buzz12586

iTrader: (17)

I am considering running a local 275 radial class with the following rules:

275 Real Street

Body & Glass

- Must have working headlights and tail lights
- Stock appearing interior, single seat, carpet, door panels, factory "type" dash
- Lexan permitted (tech will have descretion to not allow "yellowed" or poorly mounted lexan on race day)
- Windows must be operational
- No wheelie bars

Suspension

-stock type suspension factory frame rail
-ladder bar with factory frame rail add 50 lbs
-Coil overs and anti roll okay

Tires

-Maximum rear tire size allowed is 275/60-15 designation

-Tire must be used as intended from manufacturer. No alterations permitted.

Power Adders

-Single type power adder only

Exhaust

-Must have mufflers

Weights-

Small block N/A – 2750 lbs

Small block nitrous .082 jet max– 3150 lbs

Small block turbo 76 mm T4 & D1 or = supercharger - 3300

Big block N/A – 3050 lbs

Big block nitrous .065 jet max – 3450 lbs

Cylinder Head/Induction-

Single stage plate only no multi stages # 4 nitrous line

4150 carb only

23* Chevy - 20* Ford - 18* Mopar - *15 LS

Conventional Iron BB heads only

SB Limited to 427 cu in

BB limited to stock deck height 525 cu in

Buick, Pontiac and Oldsmobile engine combinations run at small block weight

Electronics-

Ignition boxes limited to standard type ignition controls (No Slew or Traction or Boost Controllers)

Digiset or time delay for nitrous control only

EFI okay

We will make an adjustment with weight, tire, jet restriction etc in the future.


Now my question is can I run 5.80-5.90's with an LT1 under these rules?

I am really considering going to a 370 or 408 LS based motor unless I can do it with the LT1 for cheaper.

I have no problem going solid roller/single plane etc... The only thing I would like to keep is the stock computer or do the LS1 computer conversion.



Thanks..

Tony Shepherd

iTrader: (4)

Just to give you an example. 5.80-5.90 is about a low 9 sec 1/4 mile which is in the range us fastest nitrous guys are at. I ran a 5.90 on a 275 shot. We are all doing it on a true slick not drag radials. I am not saying it can't be done but you better become best friends with Madman and his components. And have deep pockets! LOL

buzz12586

iTrader: (17)

Yea that's what I am worried about. I would have to be one of the fastest nitrous LT1s in the country just to be competitive in the 275 class. Where as if I go with a 408LS setup there are more guys running that fast or faster.

I hate to give up on the LT1 but I think I would be better off with an LS.

Tony Shepherd

iTrader: (4)

We would all hate for you to give up on the LT but if your goals are what you say....LS might be the better choice.

It is better to run an engine at 90% capacity than one at 100% capacity reaching the same goals. Longevity is key here. An LS would not have to work as hard.

buzz12586

iTrader: (17)

Thanks for your input Tony. I appreciate an honest answer.

suicidal racing

iTrader: (14)

Iknow 275 racing real well and let me just say..with them rules..which are similar to florida real street class and the uors class..them boys run 5.20s-5.50s most of them..and up here in the atco area and virgina there rulels are more opend and the record is a 5.08..

you need alot of power to run with them boys..im turning my car into a outlaw 275 dr car after i have fun going after the bolt on record..the atco and virgina area will let you be 2900#s with a single plate with no jet restriction and a 23 degree head..some my first engine i do will be a stock block gen1 engine around 335ci and make around 850hp on juice which will get me mid 5s on a good day..

you will want to make 1000hp-1200HP to be up in you class

theres alot of 275 action and info on rules for the east coast on yellowbullet forums...donald long they guy who puts on the outlaw radial tire championship has a 275 vs 28x10 , outlaw radail vs true ten five race going on in g.a on feb 28th..called the night the lights went out in g.a

everyone is expecting the 28x10/275 guys to be in the 4s and the tt5 and radial guys to be in the 4.40 range

suicidal racing

iTrader: (14)

also though you could run your lt1 till it gives out while you build a real motor for the class..im going to run up here just to have fun and support the class..

buzz12586

iTrader: (17)

Yea I am on Yellowbullet as well and plan on heading to SGMP to watch the race in late Feb.

The class I posted is going to be run in the southern VA, NC area. I don't think anyone is gonna run 5.20s with an .82 jet limited plate or a 76mm turbo at these weights.

z28rob18

iTrader: (7)

i agree with tony on this one you can do it but your gonna have to work it harder to get there. ive been lookin for a radial class heads up racing to compete in but if i meet my goal i wont be competitive. what track/tracks you racin this class??

buzz12586

iTrader: (17)

I know it will be run at Rockingham for sure. They haven't come out with a schedule yet though. This year I am going to try and run some 7.49/7.99 index stuff with my slow LT1. Then next winter tear it apart and start my LS build.

AChotrod

iTrader: (17)

If I was to swap out my LT1, I would just go wit a BBC and dominate all!!

z28rob18

iTrader: (7)

i dont have the money yet to compete in the heads up classes college student wit a minimum wage job. ill get there. maybe one day i plan to live in NC unfortunately heads up is impossible in NJ near me

suicidal racing

iTrader: (14)

floridas real street have been 5.20s on that sizr jet at 3100..but are not limited to 4 line..but the line dont hurt most like you think.

also the texas boys run that same size jet limit and run 5.30s and such..

no one has been that fast with a 76mm turbo though..fastest is the killa pumpkin stang with low 5.40s and mike fratena with mid 5.40s on a 76mm turbo..

buzz12586

iTrader: (17)

This class is also limited to 427ci and a 4150 carb/tb. I don't see an engine or carb limit for Florida Real Street. Not trying to start an argument, I just don't see this class being a 5.20 class.

mikes94z

What I noticed is noone commented on the small bore. It would be hard to run with the other cars. A larger bore and the best 23 degree heads you can get will be needed if you want a chance of winning. The push rod pinch area will need to be welded up. With shaft mount rockers and .375 to .550 offset on the intake. You will have to turn the motor over 8000 rpm's to get enough power to run with the class on that small of jet

Not saying it can't be done but I would be doing a motor swap.

05HD

Looks like a turbo class to me.

blackz93

iTrader: (2)

I agree. And I also vote for LS power!

CARFREAKS

iTrader: (14)

Omar Ran a 8.50's on a 275 but that was a twin turbo setup... Done by Madman

OutlawZ

iTrader: (4)

One thing you guys are forgetting is that Omar is twin turbo and he's talking about a nitrous setup I think...

OP, you didn't say what setup YOU were considering running as far as spray. You're limited to an .82 jet which with most companies is like a 225 shot???? Yeah good luck running that with the LT1.

If you were going to do it with an LT1 and THAT jet you're going to have to be right up against the weight limit. Like you'd be at 3150 exactly with you in the car. Your car's motor would have to making at least like 600-700hp NA to run those numbers at that weight.

I'm at 3400lbs and on a much smaller .065 jet (150 shot) the car went 6.20's in the 1/8th.... I figure dropping 250 lbs down to the minimum for your class you're running in would maybe shave like two tenths in the 1/8th AT BEST. Probably 1.5.... and i'm leaving on a slick not a 275 radial... I've been 5.76 in the 1/8th at 3400 but it was on twin .073 jets... way more than what that class limits you to.

To run with the best guys in those class (I'd say that class will be in the 5.30's-5.40's) you have to be at the max cubic inch wise and the minimum weight wise. I think most of those classes that are 1/8th mile and 275 radial seem to be dominated by BBC's/Nitrous combos. Not hard to run 5.40's with an .082 jet when your motor makes 800hp on nuts alone..... With those rules though it won't be as fast cause they limit BB's to conventional iron heads and 4150 carbs. Watch the class leader will be some dude in a notchback stang with a BBC and all the nitrous it can take...

even with 275 racing there is NO replacement for displacement.... sad but true. Even the turbo cars are at a disadvantage in that class cuz by the time they build max boost the race is over....

buzz12586

iTrader: (17)

Big Blocks are limited to 525ci and a .065 nitrous jet. I just wanted some reassurance that going to an LS is my best choice.