275 drag radial universal rules????
275 drag radial universal rules???? I was wondering if there were any universal rules for 275 racing?
I just looked at outlawradial.net and these are there rules:
1. 3100 lbs NOS base weight and 2700lbs N/A base weight
2. Stock Suspension, door car or truck use base weights
2a. Stock frame rail with ladder bar add 100 lbs
2b. Stock frame rail with 4 link add 200 lbs
3. Any cubic Small Block, sheetmetal intake okay
4. 275/60 Drag Radial Tire on nitrous combos - 28 X 10 slick allowed on N/A combos only.
5. Nitrous Combos or N/A only (multiple systems okay)
6. Must have mufflers
7. Progressives ok
8. 7531 ok
9. Frame notch ok, no back half cars
10. Fiberglass ok
11. Lexan ok
12. Coil Overs ok
13. Mini Tubs ok
14. No wheelie bars
1/8th mile and a Quick 8/16 format with a Pro Ladder and Pro Tree
--------------------------------------------------------------
BB/Turbo/SC Rules
BB conv head non stock deck ht single system 3400 lbs on 275's
SB F1 or = 3100 lbs on 275's
SB T76 T4 flange 3100 lbs on 275's
BB conv head stock deck height single system 3250 lbs on 275's
BB N/A conventional heads 3100 lbs on 275's
BB N/A big chief heads 3200 lbs on 275's
Ladder bar stock frame rail add 100 lbs
4 link stock frame rail add 200 lbs
The reason I'm asking is because at VMP i dont think they let you run turbo at all (I may be wrong). And in some places i think you can run a 88mm turbo instead of a 76mm.
In the future I want to build a "budget" truck manifold turbo kit and would like to race 275 but with the way RPM, Smith, and ATV are running now I dont think one 76mm would cut it even with a high dollar setup. I think a 88 could be competitive but with all the different rules I didnt want to build the wrong thing and get left out in the cold.
What are the rules for 275 where you race?
I just looked at outlawradial.net and these are there rules:
1. 3100 lbs NOS base weight and 2700lbs N/A base weight
2. Stock Suspension, door car or truck use base weights
2a. Stock frame rail with ladder bar add 100 lbs
2b. Stock frame rail with 4 link add 200 lbs
3. Any cubic Small Block, sheetmetal intake okay
4. 275/60 Drag Radial Tire on nitrous combos - 28 X 10 slick allowed on N/A combos only.
5. Nitrous Combos or N/A only (multiple systems okay)
6. Must have mufflers
7. Progressives ok
8. 7531 ok
9. Frame notch ok, no back half cars
10. Fiberglass ok
11. Lexan ok
12. Coil Overs ok
13. Mini Tubs ok
14. No wheelie bars
1/8th mile and a Quick 8/16 format with a Pro Ladder and Pro Tree
--------------------------------------------------------------
BB/Turbo/SC Rules
BB conv head non stock deck ht single system 3400 lbs on 275's
SB F1 or = 3100 lbs on 275's
SB T76 T4 flange 3100 lbs on 275's
BB conv head stock deck height single system 3250 lbs on 275's
BB N/A conventional heads 3100 lbs on 275's
BB N/A big chief heads 3200 lbs on 275's
Ladder bar stock frame rail add 100 lbs
4 link stock frame rail add 200 lbs
The reason I'm asking is because at VMP i dont think they let you run turbo at all (I may be wrong). And in some places i think you can run a 88mm turbo instead of a 76mm.
In the future I want to build a "budget" truck manifold turbo kit and would like to race 275 but with the way RPM, Smith, and ATV are running now I dont think one 76mm would cut it even with a high dollar setup. I think a 88 could be competitive but with all the different rules I didnt want to build the wrong thing and get left out in the cold.
What are the rules for 275 where you race?
Look @ cecil county's website, they have a set of rules for the 275 class that are pretty fair, from the results I have seen they're class seems to be pretty even. I do beileve that they allow a single turbo 88 or 80 mm ( I don't recall without looking it up) and they allow up to an F1R supercharger as well, unless ti changed since I was looking at it.
Honestly I considered trying to build for that class... but what it costs to basicially build to go 4.80 is more $ then I have (and that's what you have to build for, if you want to be able to win, because if as many guys have gone 5.0 to 5.1 this year, next year they'll be going 4.80) That being said, I may not even build for 8.50 next year now
Might jsut try to get as much weight out as I can, make some changes on the existing motor and try for 9.50 on a 50 shot, and maybe hope, that the car will go 8.50 with the wick fully lit, and then maybe, try to go to a couple 8.50 races, if it stays together.
Honestly I considered trying to build for that class... but what it costs to basicially build to go 4.80 is more $ then I have (and that's what you have to build for, if you want to be able to win, because if as many guys have gone 5.0 to 5.1 this year, next year they'll be going 4.80) That being said, I may not even build for 8.50 next year now
Might jsut try to get as much weight out as I can, make some changes on the existing motor and try for 9.50 on a 50 shot, and maybe hope, that the car will go 8.50 with the wick fully lit, and then maybe, try to go to a couple 8.50 races, if it stays together. 
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Like all other rules, everyone is going ot have a different twist to the thing with the same name. About the only thing that might be and we will see for how long, common is the 275 radial.
I say that because if someone wanted to run with a 16" wheel, a 275 would make no sense but a 295 measures about the same.
I say that because if someone wanted to run with a 16" wheel, a 275 would make no sense but a 295 measures about the same.
Look @ cecil county's website, they have a set of rules for the 275 class that are pretty fair, from the results I have seen they're class seems to be pretty even. I do beileve that they allow a single turbo 88 or 80 mm ( I don't recall without looking it up) and they allow up to an F1R supercharger as well, unless ti changed since I was looking at it.
Honestly I considered trying to build for that class... but what it costs to basicially build to go 4.80 is more $ then I have (and that's what you have to build for, if you want to be able to win, because if as many guys have gone 5.0 to 5.1 this year, next year they'll be going 4.80) That being said, I may not even build for 8.50 next year now Might jsut try to get as much weight out as I can, make some changes on the existing motor and try for 9.50 on a 50 shot, and maybe hope, that the car will go 8.50 with the wick fully lit, and then maybe, try to go to a couple 8.50 races, if it stays together.
Honestly I considered trying to build for that class... but what it costs to basicially build to go 4.80 is more $ then I have (and that's what you have to build for, if you want to be able to win, because if as many guys have gone 5.0 to 5.1 this year, next year they'll be going 4.80) That being said, I may not even build for 8.50 next year now
Might jsut try to get as much weight out as I can, make some changes on the existing motor and try for 9.50 on a 50 shot, and maybe hope, that the car will go 8.50 with the wick fully lit, and then maybe, try to go to a couple 8.50 races, if it stays together.It seems like the 8.50 index class is gaining some steam now, I may just have to cancel my heads up racing dreams and plan to run some bracket or index races.
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alot of times the organization has an idea of how fast they want the cars to run before they setup the rules.... it seems a majority want it to stay at or below 4.90 in the
8th.... if cars start going faster they will just make more rules to slow people down which i think is smart and keeps some of the speeds down atleast for a safety stand point...
anymore a 5.50 or 8.50 stock suspension car is just an average car.... these damn cars are getting out of control every year they are ran.... wont be long till 5.00 aint **** either...
8th.... if cars start going faster they will just make more rules to slow people down which i think is smart and keeps some of the speeds down atleast for a safety stand point...
anymore a 5.50 or 8.50 stock suspension car is just an average car.... these damn cars are getting out of control every year they are ran.... wont be long till 5.00 aint **** either...
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Don't see too many 275 class cars running 4.90's and below.
You need to build the car for the specific series you will run or you take the chance of building the car and not fitting in the class. Our 275 class is almost like outlaw 275 where twin 80's are allowed, F3R's and BBC's up to 600", but weight gets added. When you start going to fast or you dominate a class, the rules get changed anyway...
You need to build the car for the specific series you will run or you take the chance of building the car and not fitting in the class. Our 275 class is almost like outlaw 275 where twin 80's are allowed, F3R's and BBC's up to 600", but weight gets added. When you start going to fast or you dominate a class, the rules get changed anyway...
It seems like the "fast guys" are running at about 5.00-5.15 range with someone dipping in the 4's every once and a while. I would be happy to run 5.30's all day which would be a mid qualifier.
I think its pretty obvious that 76mm's cant hang with small block unlimited n2o cars too. Especially since turbo and sc cars shine in the second half running big mph while nitrous cars seem to do best in the 1/8th.
I also think it would be best if there could be some universal rules agreed upon by the majority and the track owners so you can run 275 at different tracks and not worry about fitting into the class. There are enough tracks like Cecil, MIR, Rockingham, VMP, Atco, and Piedmont in the area I'm in to have a pretty awesome 275 class where people can travel about 4 to 5 hours and race 275 at all the tracks.
If we could get organized enough maybe the LSx shootout and maybe someone like the NMCA could adopt the rules and run a class called "Limited 275", "275 Street", or something like that along side of the outlaw radial class. Let the outlaws run 315's on stock suspension all out and use the 275 class as a feeder for the big class when guys are ready to make the step up. If the rules can keep the cars in the 4.9 to 5.60 range in the 1/8th or 7.90-8.90 in the 1/4 I think it would be a good entry level heads up class.
I think its pretty obvious that 76mm's cant hang with small block unlimited n2o cars too. Especially since turbo and sc cars shine in the second half running big mph while nitrous cars seem to do best in the 1/8th.
I also think it would be best if there could be some universal rules agreed upon by the majority and the track owners so you can run 275 at different tracks and not worry about fitting into the class. There are enough tracks like Cecil, MIR, Rockingham, VMP, Atco, and Piedmont in the area I'm in to have a pretty awesome 275 class where people can travel about 4 to 5 hours and race 275 at all the tracks.
If we could get organized enough maybe the LSx shootout and maybe someone like the NMCA could adopt the rules and run a class called "Limited 275", "275 Street", or something like that along side of the outlaw radial class. Let the outlaws run 315's on stock suspension all out and use the 275 class as a feeder for the big class when guys are ready to make the step up. If the rules can keep the cars in the 4.9 to 5.60 range in the 1/8th or 7.90-8.90 in the 1/4 I think it would be a good entry level heads up class.
Last edited by MelScrilla; Sep 30, 2009 at 05:11 PM.
Originally Posted by from drag radial message board
Posted by John Sears on 9/30/2009, 11:29 am
Suspension Rules
1. Any type suspension, stock rear frame rail , stock front frame rail including:
A. Coil overs
B. Spindle Mounts
C. After market K members
D. After market front sub frame on Chevy II
E. Anti-roll
Weights by combo
2. SB Multiple Systems w/NOS-Blower-Turbo -NA -3100 lb base weight
NOS SB
A. Stock Valve angle 20-23 degree deduct 100 lbs (NOS Combos only)
B. Canted valve limited to 2 systems
C. Single nitrous system deduct 100 lbs.(any other system must be capped off)
BLOWER SB
A. YSi / F1A or = at base weight of 3100 lbs
B. F1C or = add 100 lbs
C. F1R, Xi or = add 200 lbs
TURBO SB
A. 76 mm T6 at base weight of 3100 lbs
B. 80 mm T6 add 100 lbs
C. 85 mm T6 add 200 lbs (max turbo size is GT47, Y2k must run reducer sleeve)
N/A SB
A. Deduct 400 lbs
3. Big Block Combos (limited to N/A and NOS only)
NOS BB
A. Standard Deck HT BB Conventional Head Single System NOS 3250 lbs
B. Tall Deck HT BB Conventional Head Single System NOS 3400 lbs (limited to 10.2)
N/A BB
A. Standard Deck HT Conventional Head 3000
B. Tall Deck HT Conventional Head 3100 (limited to 10.2)
C. Standard Deck HT Big Chief 3250
4. General Rules
A. 275 max tire size as printed on sidewall, radial tire
B. Deduct 50 lbs for 275 BFG Drag Radial
C. 28 X 10.5 non W slick allowed on N/A combos
D. All weights are with driver
E. Mufflers on all combo except turbo
F. No wheelie bars
G. Tech reserves the right to accept of reject any car or driver
H. Courtesy Staging is in effect
Suspension Rules
1. Any type suspension, stock rear frame rail , stock front frame rail including:
A. Coil overs
B. Spindle Mounts
C. After market K members
D. After market front sub frame on Chevy II
E. Anti-roll
Weights by combo
2. SB Multiple Systems w/NOS-Blower-Turbo -NA -3100 lb base weight
NOS SB
A. Stock Valve angle 20-23 degree deduct 100 lbs (NOS Combos only)
B. Canted valve limited to 2 systems
C. Single nitrous system deduct 100 lbs.(any other system must be capped off)
BLOWER SB
A. YSi / F1A or = at base weight of 3100 lbs
B. F1C or = add 100 lbs
C. F1R, Xi or = add 200 lbs
TURBO SB
A. 76 mm T6 at base weight of 3100 lbs
B. 80 mm T6 add 100 lbs
C. 85 mm T6 add 200 lbs (max turbo size is GT47, Y2k must run reducer sleeve)
N/A SB
A. Deduct 400 lbs
3. Big Block Combos (limited to N/A and NOS only)
NOS BB
A. Standard Deck HT BB Conventional Head Single System NOS 3250 lbs
B. Tall Deck HT BB Conventional Head Single System NOS 3400 lbs (limited to 10.2)
N/A BB
A. Standard Deck HT Conventional Head 3000
B. Tall Deck HT Conventional Head 3100 (limited to 10.2)
C. Standard Deck HT Big Chief 3250
4. General Rules
A. 275 max tire size as printed on sidewall, radial tire
B. Deduct 50 lbs for 275 BFG Drag Radial
C. 28 X 10.5 non W slick allowed on N/A combos
D. All weights are with driver
E. Mufflers on all combo except turbo
F. No wheelie bars
G. Tech reserves the right to accept of reject any car or driver
H. Courtesy Staging is in effect
It seems like the "fast guys" are running at about 5.00-5.15 range with someone dipping in the 4's every once and a while. I would be happy to run 5.30's all day which would be a mid qualifier.
I think its pretty obvious that 76mm's cant hang with small block unlimited n2o cars too. Especially since turbo and sc cars shine in the second half running big mph while nitrous cars seem to do best in the 1/8th.
I also think it would be best if there could be some universal rules agreed upon by the majority and the track owners so you can run 275 at different tracks and not worry about fitting into the class. There are enough tracks like Cecil, MIR, Rockingham, VMP, Atco, and Piedmont in the area I'm in to have a pretty awesome 275 class where people can travel about 4 to 5 hours and race 275 at all the tracks.
I think its pretty obvious that 76mm's cant hang with small block unlimited n2o cars too. Especially since turbo and sc cars shine in the second half running big mph while nitrous cars seem to do best in the 1/8th.
I also think it would be best if there could be some universal rules agreed upon by the majority and the track owners so you can run 275 at different tracks and not worry about fitting into the class. There are enough tracks like Cecil, MIR, Rockingham, VMP, Atco, and Piedmont in the area I'm in to have a pretty awesome 275 class where people can travel about 4 to 5 hours and race 275 at all the tracks.
A few 5.teen passes
A bunch of 5.2-5.5's if you can run 5.4's consistantly you will be very competetive.
We will have our motor for sale here shortly ... you can buy it and run 5.3's or better all year with no problem.
I would love to buy your motor but I'm broke, if i did anything is going to be a slow used parts build. I was thinking a forged 347 with a gt47-85, so I could reuse my block and crank, and hope it holds up to 1100 or so hp. I'm local to RPM I plan on getting them to do the work and I know they can tune it if anyone can.
Outside of the LS world no one is running faster than Justin Smith (who has a sweet car by the way). I thought there might be a nitrous BBC dipping into the 4's.
Outside of the LS world no one is running faster than Justin Smith (who has a sweet car by the way). I thought there might be a nitrous BBC dipping into the 4's.
Hell The 8.50 class is geting really big... but the cost of racing it is making it a little out of my reach I think, as I'm trying to stay within a budget too.
I'm just gonna stay on the weight reduction kick, keep after the 2900 lb goal... if I get it there and make a few moor improvments, 9.50 will be attainable with probably a 100 shot on a 4 second delay or so, maybe not at all.
If it gets to that mark with little to no nitrous, I'll hit it with 300 and see how close I am to 8.50. If it runs the #, then I'll give it a shot. Really good competition in the 8.50 stuff I've seen, and there's decent prize money too, entry fee's aren't too bad either.
I'm just gonna stay on the weight reduction kick, keep after the 2900 lb goal... if I get it there and make a few moor improvments, 9.50 will be attainable with probably a 100 shot on a 4 second delay or so, maybe not at all.
If it gets to that mark with little to no nitrous, I'll hit it with 300 and see how close I am to 8.50. If it runs the #, then I'll give it a shot. Really good competition in the 8.50 stuff I've seen, and there's decent prize money too, entry fee's aren't too bad either.
...Limited 10.5 is also cool and I hear there will be a 8.5 class here in WCHRA next year, that should be cool too...Sounds like some of you want index classes with the limit on times run instead of heads up. Believe me I want to run a heads up class... I just can't afford it with no actual sponsorship help. Even then, I don't think I could do it and race every week. Index class, I may be able to float, but even then, it's iffy on a weekly regiment.
Hell, if there was a 12.0 speed heads up type class I'd have built for that.
Hell, if there was a 12.0 speed heads up type class I'd have built for that.
I'm not trying to make an index class and not trying to force people to adopt rules but there are so many classes that are super close to each other. If they could agree on weights and combos it could be one big class instead of having every track having there own rules.
If you have a class where you race that you like thats cool no one is trying to change that. But if there is a class where a nitrous sb can weight 3100 and another where they are 3200# maybe we can get them together.
Here in NC we have VMP, Peidmont, Roxboro, Fayetville, Benson, Rockingham, and other tracks that have 275 classes with similar rules but if we could get them together the radial scene would just be better for it.
If you have a class where you race that you like thats cool no one is trying to change that. But if there is a class where a nitrous sb can weight 3100 and another where they are 3200# maybe we can get them together.
Here in NC we have VMP, Peidmont, Roxboro, Fayetville, Benson, Rockingham, and other tracks that have 275 classes with similar rules but if we could get them together the radial scene would just be better for it.
That's the one thing I like about the 8.50 stuff, that attracted me to it. It's pretty much run what ya want, as long as there's no lettering, the car looks like a car with 1/2 an interior, you're good. Weights, motor combo's, tire size are all pretty open, hell youc an run a back 1/2'd car, so that says it. Tire limitation is 31x10.5W, which is friggin huge, and I think the weight is 3000 lbs small block 3200 big block (don't quote me that's just what I recall)
So, a stock suspension ls car can runn all day long, hell with stock frame rails anything more then a 29.5x10.5S tire is gonna be really tight... and weight wise it's a fight to get the car to 3000 lbs... everything else, is prety open. Just run 8.50, don't go any faster (unless the guy in the other lane goes WAY faster and you both run too fast, in that case the guy closer to the mark advances) and have your safety stuff for how fast the car will run (25.5 if you're going faster then 8.50)
I'd love to see a 5.50 1/8th mile index. That, would be cheap to run, and easy on parts.
So, a stock suspension ls car can runn all day long, hell with stock frame rails anything more then a 29.5x10.5S tire is gonna be really tight... and weight wise it's a fight to get the car to 3000 lbs... everything else, is prety open. Just run 8.50, don't go any faster (unless the guy in the other lane goes WAY faster and you both run too fast, in that case the guy closer to the mark advances) and have your safety stuff for how fast the car will run (25.5 if you're going faster then 8.50)
I'd love to see a 5.50 1/8th mile index. That, would be cheap to run, and easy on parts.
There is more than 1 5.0 pass on 275's, Dave Bowman has laid down several 5.0's and several others in the 5.teens, you just looking at a particular series I would guess? PSCA and several other santions make the rules for their own series and to change them to some universal rules will never happen accross the board or you would screw the guys already running them. Everyone wants the rules to fit their build ...Limited 10.5 is also cool and I hear there will be a 8.5 class here in WCHRA next year, that should be cool too...Sounds like some of you want index classes with the limit on times run instead of heads up.
...Limited 10.5 is also cool and I hear there will be a 8.5 class here in WCHRA next year, that should be cool too...Sounds like some of you want index classes with the limit on times run instead of heads up. I figured that, PSCA has tightened it up to. We don't have all the choices you guys get so were limited to what we have on a very few tracks and the tracks don't make the rules, WCHRA does. You guys have faster and better prepped tracks for sure and we run in 100+ deg heat all summer lol, we need all the help we can get. Whatever the rules, it just needs to bring cars out and race, be competitive and have fun. Our 275 class could simply swap tires and just go to outlaw DR and compete which makes it super pricey to race in. I see you have put down some steller times ATV on your own setup with 275's with a jug even, very nice.