M6 drag racer's need some input
05-10-2009, 08:22 PM
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M6 drag racer's need some input I was at the track this weekend with my cam only ls6 setup. with a fab nine and 3.89 gear and a 275-26-15 MT Drag Rad. Well the problem is my 60. cant dump the clutch cuz of the drag Rad's. I am done trying to get them to work it is so hit or miss. So i am looking at slick's. do i go with a 28 or a 26 with the gear i have???? Oh and this time out my best pass was a 11.65 at 123.xx almost a 124 mph so what tire do i try next????
Rob
Rob
05-10-2009, 08:52 PM
#3
stay with a slick. I would go 28x9 like mentioned , the et street never worked great for me. 1.63 was the best I got on them, 1.59 on the et street radial.
Radials were very hit or miss for me too, with a 3.89 gear a 26 x10 would do good. Better then the drag radial by far and more consistent.
Radials were very hit or miss for me too, with a 3.89 gear a 26 x10 would do good. Better then the drag radial by far and more consistent.
05-10-2009, 08:59 PM
#4
spoke with the old man...he thinks you should go with a stiff wall 28" tall 9" slick(forget the 26" especially if you go heads in the future)...since the 28' is going to kill the gear a hair and also the mph some he think you should go a min of 4.10s but preferably smaller like 4.30s-4.56s(max effort)...i think you will be fine on the street too with two overdrives 5, 6...
if you dont wanna do the gear now you can always do it later, but i would get the 28" if you want consistency...
1. Smokin01ta 10.219 @ 132.29 (1.38), 01 T/A, M6, Spec4, 4.56, TRex, -1100, 3010 lbs, 3/06
2. LS1Joe 10.232@132.04 (1.39), 02z28, M6, Spec4, 4.71, 250, -1100, 3150, 03/06
6. SSmokedLS1 10.48 @ 130.29 (1.45), 01 T/A, M6, Spec4, 4.56, TRex, 800, 3035, 3/07
11. Jason99ta 10.783 @ 128.27 (1.56), 99 T/A, M6, RAM, 4.56, TRex, 1300, 3253, 06/04
14. GrannySShifting 10.821 @ 126.9 (1.47), 97 SS, M6, Tex, 4.56, PSI 233/238, -1000+, 3458, 11/08
if you dont wanna do the gear now you can always do it later, but i would get the 28" if you want consistency...
1. Smokin01ta 10.219 @ 132.29 (1.38), 01 T/A, M6, Spec4, 4.56, TRex, -1100, 3010 lbs, 3/06
2. LS1Joe 10.232@132.04 (1.39), 02z28, M6, Spec4, 4.71, 250, -1100, 3150, 03/06
6. SSmokedLS1 10.48 @ 130.29 (1.45), 01 T/A, M6, Spec4, 4.56, TRex, 800, 3035, 3/07
11. Jason99ta 10.783 @ 128.27 (1.56), 99 T/A, M6, RAM, 4.56, TRex, 1300, 3253, 06/04
14. GrannySShifting 10.821 @ 126.9 (1.47), 97 SS, M6, Tex, 4.56, PSI 233/238, -1000+, 3458, 11/08
Last edited by chrs1313; 05-10-2009 at 09:05 PM.
05-10-2009, 09:15 PM
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spoke with the old man...he thinks you should go with a stiff wall 28" tall 9" slick(forget the 26" especially if you go heads in the future)...since the 28' is going to kill the gear a hair and also the mph some he think you should go a min of 4.10s but preferably smaller like 4.30s-4.56s(max effort)...i think you will be fine on the street too with two overdrives 5, 6...
if you dont wanna do the gear now you can always do it later, but i would get the 28" if you want consistency...
1. Smokin01ta 10.219 @ 132.29 (1.38), 01 T/A, M6, Spec4, 4.56, TRex, -1100, 3010 lbs, 3/06
2. LS1Joe 10.232@132.04 (1.39), 02z28, M6, Spec4, 4.71, 250, -1100, 3150, 03/06
6. SSmokedLS1 10.48 @ 130.29 (1.45), 01 T/A, M6, Spec4, 4.56, TRex, 800, 3035, 3/07
11. Jason99ta 10.783 @ 128.27 (1.56), 99 T/A, M6, RAM, 4.56, TRex, 1300, 3253, 06/04
14. GrannySShifting 10.821 @ 126.9 (1.47), 97 SS, M6, Tex, 4.56, PSI 233/238, -1000+, 3458, 11/08
if you dont wanna do the gear now you can always do it later, but i would get the 28" if you want consistency...
1. Smokin01ta 10.219 @ 132.29 (1.38), 01 T/A, M6, Spec4, 4.56, TRex, -1100, 3010 lbs, 3/06
2. LS1Joe 10.232@132.04 (1.39), 02z28, M6, Spec4, 4.71, 250, -1100, 3150, 03/06
6. SSmokedLS1 10.48 @ 130.29 (1.45), 01 T/A, M6, Spec4, 4.56, TRex, 800, 3035, 3/07
11. Jason99ta 10.783 @ 128.27 (1.56), 99 T/A, M6, RAM, 4.56, TRex, 1300, 3253, 06/04
14. GrannySShifting 10.821 @ 126.9 (1.47), 97 SS, M6, Tex, 4.56, PSI 233/238, -1000+, 3458, 11/08
05-10-2009, 09:16 PM
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stay with a slick. I would go 28x9 like mentioned , the et street never worked great for me. 1.63 was the best I got on them, 1.59 on the et street radial.
Radials were very hit or miss for me too, with a 3.89 gear a 26 x10 would do good. Better then the drag radial by far and more consistent.
Radials were very hit or miss for me too, with a 3.89 gear a 26 x10 would do good. Better then the drag radial by far and more consistent.
05-11-2009, 03:02 AM
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just put 4.30's and a 9 inch in my buddies car. it drives great on the street with the 28's and he also runs an 18" z06 with a 275/45 (?). looking to get times very soon. 
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05-11-2009, 08:11 AM
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First of all, where is shift point? what is our rev-limiter?
Lets say its 7000rpm, you will have roughly 130mph with a 28" slick and a 4.56 gear. If you go with a 4.30 you will be closer to 135 at 7000rpm. I honestly do not see you going 135 with your current set up.
If you continualy think "well I'll set the car up this way in case I change something in the future" you will never get the best out of your current setup. There will always be a future set-up, and you will be selling yourself short by trying to forsee for it.
Work with what you have, gears are $180, you can swap them to what you need when you need it later on.
Go with 4.56, and a "stiff sidewall" M/T 28x10.5 15S
At 7200rpm this tire an gear combo gives me 132mph. so clearly, you have room to grow.
If I was you, I would go with a 4.11's and a 26" tire. At 7000rpm you can go 127/128 and this would be perfect for your current setup. You want to cross the traps at as high of an RPM as you can, "top of 4th gear"
with 3.89's and 28" tires you will be crossing the traps at 124mph at 5800rpm... that is ******* terrible
with 4.11's and a 26" tire 124mph is 6600rpm, much better [depending on your cam]
with 4.11's and a 28" tire 124mph is 6100rpm, too low unless you have a cam that you shift at 6200 or so.
with 4.56's and a 28" tire 124mphs is 6800rpm, if your heads can breath that high, thats very good.
there are too many variables, but the one constant is that you should pick a gear/tire for what you have now. Tires dont last long, so its not like you will be using the same slicks for 3 years. And gears are cheap, you can set a different ratio when you get heads.
Lets say its 7000rpm, you will have roughly 130mph with a 28" slick and a 4.56 gear. If you go with a 4.30 you will be closer to 135 at 7000rpm. I honestly do not see you going 135 with your current set up.
If you continualy think "well I'll set the car up this way in case I change something in the future" you will never get the best out of your current setup. There will always be a future set-up, and you will be selling yourself short by trying to forsee for it.
Work with what you have, gears are $180, you can swap them to what you need when you need it later on.
Go with 4.56, and a "stiff sidewall" M/T 28x10.5 15S
At 7200rpm this tire an gear combo gives me 132mph. so clearly, you have room to grow.
If I was you, I would go with a 4.11's and a 26" tire. At 7000rpm you can go 127/128 and this would be perfect for your current setup. You want to cross the traps at as high of an RPM as you can, "top of 4th gear"
with 3.89's and 28" tires you will be crossing the traps at 124mph at 5800rpm... that is ******* terrible
with 4.11's and a 26" tire 124mph is 6600rpm, much better [depending on your cam]
with 4.11's and a 28" tire 124mph is 6100rpm, too low unless you have a cam that you shift at 6200 or so.
with 4.56's and a 28" tire 124mphs is 6800rpm, if your heads can breath that high, thats very good.
there are too many variables, but the one constant is that you should pick a gear/tire for what you have now. Tires dont last long, so its not like you will be using the same slicks for 3 years. And gears are cheap, you can set a different ratio when you get heads.
05-11-2009, 10:01 AM
#15
i was leaving the line anywhere from 6500 to 7000 on 26" drag radials. I had an aluminum flywheel so it did not hit as hard. Car would still bog.
On a 26" slick it hazed a little and would never bog. I ran just as quick with 4.10's as I did with 4,30's
On a 26" slick it hazed a little and would never bog. I ran just as quick with 4.10's as I did with 4,30's
05-11-2009, 10:19 AM
#16
If you go with a 4.30 you will be closer to 135 at 7000rpm. I honestly do not see you going 135 with your current set up.
If you continualy think "well I'll set the car up this way in case I change something in the future" you will never get the best out of your current setup. There will always be a future set-up, and you will be selling yourself short by trying to forsee for it.
If you continualy think "well I'll set the car up this way in case I change something in the future" you will never get the best out of your current setup. There will always be a future set-up, and you will be selling yourself short by trying to forsee for it.
I have done well on a 26" slick on a 15 x 8 convo pro but I expect to be going up to a 28" tall slick on a 15 x 10 rim which would need a rim like a Bogart ($$$) that will clear stock brakes....
If I try 28" on a 15 x 8 rim, its not going to be optimal at all and to get a rim to properly fit w/o a **** load of grinding bogarts all the way
As for the intended use of the car vs rear gear ratio, beleive me, anyone that I know wants more gear in the car but I like driving her on the street, and depending on funds, i may get to the track 0 to 10 times a year so that 1% of use, is it worth over gearing the car.
Thats why I had looked into a MN12 trans that would get Fbody ratios for 5/6th gears, thats another option. Becuase when I drive on the street, the car cars has a 26" tall tire (Nitto DR 275/40-17) and now it maybe over geared.
There is a lot to ponder there.
05-11-2009, 10:47 AM
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First of all, where is shift point? what is our rev-limiter?
Lets say its 7000rpm, you will have roughly 130mph with a 28" slick and a 4.56 gear. If you go with a 4.30 you will be closer to 135 at 7000rpm. I honestly do not see you going 135 with your current set up.
If you continualy think "well I'll set the car up this way in case I change something in the future" you will never get the best out of your current setup. There will always be a future set-up, and you will be selling yourself short by trying to forsee for it.
Work with what you have, gears are $180, you can swap them to what you need when you need it later on.
Go with 4.56, and a "stiff sidewall" M/T 28x10.5 15S
At 7200rpm this tire an gear combo gives me 132mph. so clearly, you have room to grow.
If I was you, I would go with a 4.11's and a 26" tire. At 7000rpm you can go 127/128 and this would be perfect for your current setup. You want to cross the traps at as high of an RPM as you can, "top of 4th gear"
with 3.89's and 28" tires you will be crossing the traps at 124mph at 5800rpm... that is ******* terrible
with 4.11's and a 26" tire 124mph is 6600rpm, much better [depending on your cam]
with 4.11's and a 28" tire 124mph is 6100rpm, too low unless you have a cam that you shift at 6200 or so.
with 4.56's and a 28" tire 124mphs is 6800rpm, if your heads can breath that high, thats very good.
there are too many variables, but the one constant is that you should pick a gear/tire for what you have now. Tires dont last long, so its not like you will be using the same slicks for 3 years. And gears are cheap, you can set a different ratio when you get heads.
Lets say its 7000rpm, you will have roughly 130mph with a 28" slick and a 4.56 gear. If you go with a 4.30 you will be closer to 135 at 7000rpm. I honestly do not see you going 135 with your current set up.
If you continualy think "well I'll set the car up this way in case I change something in the future" you will never get the best out of your current setup. There will always be a future set-up, and you will be selling yourself short by trying to forsee for it.
Work with what you have, gears are $180, you can swap them to what you need when you need it later on.
Go with 4.56, and a "stiff sidewall" M/T 28x10.5 15S
At 7200rpm this tire an gear combo gives me 132mph. so clearly, you have room to grow.
If I was you, I would go with a 4.11's and a 26" tire. At 7000rpm you can go 127/128 and this would be perfect for your current setup. You want to cross the traps at as high of an RPM as you can, "top of 4th gear"
with 3.89's and 28" tires you will be crossing the traps at 124mph at 5800rpm... that is ******* terrible
with 4.11's and a 26" tire 124mph is 6600rpm, much better [depending on your cam]
with 4.11's and a 28" tire 124mph is 6100rpm, too low unless you have a cam that you shift at 6200 or so.
with 4.56's and a 28" tire 124mphs is 6800rpm, if your heads can breath that high, thats very good.
there are too many variables, but the one constant is that you should pick a gear/tire for what you have now. Tires dont last long, so its not like you will be using the same slicks for 3 years. And gears are cheap, you can set a different ratio when you get heads.
2. i never plan on what i am going to do next i always work with what i have and what i am running And as for my setup. My car is a Cam only LS6 longblock with stock 243 heads And the Vindicator cam 240/244 .605/.596 112 LSA. 2400-7000 Rpm with ported fast 90mm/90 setup full 85mm maf and lid with custom made ramair intake by chrs1313 and asp under drive. rear end is a moser nine with 3.89 gear 35 spline and moly 3.5 drive shaft with full strange SA shocks on all fours. and tex oz700 clutch.
3.I really am just trying to max out my car cam only befor i put heads on it looking to make the cam only list then get on the head/cam list so i may just get the 4.56 and a 28
4. Thanx for all your help everyone Thanx Rob
05-11-2009, 11:31 AM
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1. My shift point that i was shifting at WAS 6500(mph at 121 to 120) but on my last pass i shifted it at 6700 and mph better at the 124mph with the tach at 6300 still alot left on the table with my short shifting and gear so i need to still go hight may end up at 7000rpm.
2. i never plan on what i am going to do next i always work with what i have and what i am running And as for my setup. My car is a Cam only LS6 longblock with stock 243 heads And the Vindicator cam 240/244 .605/.596 112 LSA. 2400-7000 Rpm with ported fast 90mm/90 setup full 85mm maf and lid with custom made ramair intake by chrs1313 and asp under drive. rear end is a moser nine with 3.89 gear 35 spline and moly 3.5 drive shaft with full strange SA shocks on all fours. and tex oz700 clutch.
3.I really am just trying to max out my car cam only befor i put heads on it looking to make the cam only list then get on the head/cam list so i may just get the 4.56 and a 28
4. Thanx for all your help everyone Thanx Rob
2. i never plan on what i am going to do next i always work with what i have and what i am running And as for my setup. My car is a Cam only LS6 longblock with stock 243 heads And the Vindicator cam 240/244 .605/.596 112 LSA. 2400-7000 Rpm with ported fast 90mm/90 setup full 85mm maf and lid with custom made ramair intake by chrs1313 and asp under drive. rear end is a moser nine with 3.89 gear 35 spline and moly 3.5 drive shaft with full strange SA shocks on all fours. and tex oz700 clutch.
3.I really am just trying to max out my car cam only befor i put heads on it looking to make the cam only list then get on the head/cam list so i may just get the 4.56 and a 28
4. Thanx for all your help everyone Thanx Rob
Here's the thing, if you want to run a 28" tire, which would be a clear benefit for traction, unless you go with 4.56 gear, it will be a big waste.
Like I said before, 4.56's and a 28" tire [not counting in any tire growth] will give you 128mph. At your current trap of 124 you will have plenty of room to advance. At 124, you will be crossing the traps at 6800rpm which will be perfect for you. That is right after your shift point, and you sill have a few more RPM to go before the limiter.
Believe me, 4.56's are fine on the street. I have them in my car and I have no problem taking long trips with it. I have 275-50-17 [roughly 28" tall] M&H Drag radials on the back, which fit on my stock WS6 rims and at 80mph I am at 2200rpm. Not to bad at all when you consider with stock gearing and stock tires the car wwould be at roughly 1800rpm. 400RPM difference in cruise when you consider the difference in performance is nothing.
05-11-2009, 11:40 AM
#19
Believe me, 4.56's are fine on the street. I have them in my car and I have no problem taking long trips with it. I have 275-50-17 [roughly 28" tall] M&H Drag radials on the back, which fit on my stock WS6 rims and at 80mph I am at 2200rpm. Not to bad at all when you consider with stock gearing and stock tires the car wwould be at roughly 1800rpm. 400RPM difference in cruise when you consider the difference in performance is nothing.
05-11-2009, 12:12 PM
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If you can go to 7000rpm then the choises I gave before should work out fine for ya.
Here's the thing, if you want to run a 28" tire, which would be a clear benefit for traction, unless you go with 4.56 gear, it will be a big waste.
Like I said before, 4.56's and a 28" tire [not counting in any tire growth] will give you 128mph. At your current trap of 124 you will have plenty of room to advance. At 124, you will be crossing the traps at 6800rpm which will be perfect for you. That is right after your shift point, and you sill have a few more RPM to go before the limiter.
Believe me, 4.56's are fine on the street. I have them in my car and I have no problem taking long trips with it. I have 275-50-17 [roughly 28" tall] M&H Drag radials on the back, which fit on my stock WS6 rims and at 80mph I am at 2200rpm. Not to bad at all when you consider with stock gearing and stock tires the car wwould be at roughly 1800rpm. 400RPM difference in cruise when you consider the difference in performance is nothing.
Here's the thing, if you want to run a 28" tire, which would be a clear benefit for traction, unless you go with 4.56 gear, it will be a big waste.
Like I said before, 4.56's and a 28" tire [not counting in any tire growth] will give you 128mph. At your current trap of 124 you will have plenty of room to advance. At 124, you will be crossing the traps at 6800rpm which will be perfect for you. That is right after your shift point, and you sill have a few more RPM to go before the limiter.
Believe me, 4.56's are fine on the street. I have them in my car and I have no problem taking long trips with it. I have 275-50-17 [roughly 28" tall] M&H Drag radials on the back, which fit on my stock WS6 rims and at 80mph I am at 2200rpm. Not to bad at all when you consider with stock gearing and stock tires the car wwould be at roughly 1800rpm. 400RPM difference in cruise when you consider the difference in performance is nothing.
Thanx for the time and the help and just to let you know your car is what started me on this rant of going fast. Thanx for the help
Rob