Need Gear Recommendation

[Lonnie Cox]

You have all helped me with my stocker, I am getting closer to the index.But need more help.what I have is.
76 Camaro
350 cid
287 NHRA rated HP
350 turbo with 275 First
5.13 gears
Mickey Thompson ET Slicks 9x30
we ran a 12.80 @ 102 yesterday
shifting @ 7k
went thru the lights @ 6500
60ft 1.71
I have the Cal Tracs bars and springs
Thank You all I am happy I finally got in the 12's

[Alan Roehrich]

I'd consider going to a 2.52:1 low gear, and a 5.38:1 rear gear.

[Lonnie Cox]

Alan I dont want to spend any money on this trans, would the 5.38 work for now I am thinking of a Pro trans later I am not sure I dont know what first gear ..

[Mark Lewis]

what type of converter?
Looks like you ned about .15 just in 60'
5.38 won't help that much

[Greg Reimer 7376]

Sounds like you're close, but try short shifting it about 6500 and seeing what happens. I usually don't turn a 327 that high through the gears. 5.38's to 5.13's isn't that different-5-7 % or so. You do need 60 foots in the 1.55-1.58 range, though. What class are you shooting for, and what index?

[Alan Roehrich]

Yeah, the 1-2 shift probably needs to be about 6200-6400, at most.

The 5.38 will help if you swap to a 2.52 low gear, what's going on here is you have way too much drop between 1st and 2nd, the car is not moving fast enough, and the RPM drops too far.

[Lonnie Cox]

Originally Posted by Greg Reimer 7376

Sounds like you're close, but try short shifting it about 6500 and seeing what happens. I usually don't turn a 327 that high through the gears. 5.38's to 5.13's isn't that different-5-7 % or so. You do need 60 foots in the 1.55-1.58 range, though. What class are you shooting for, and what index?

Greg its is a 350 cid the class is I/SA 12.30 index,

[Glenn Hayes]

Originally Posted by Lonnie Cox

You have all helped me with my stocker, I am getting closer to the index.But need more help.what I have is.
76 Camaro
350 cid
287 NHRA rated HP
350 turbo with 275 First
5.13 gears
Mickey Thompson ET Slicks 9x30
we ran a 12.80 @ 102 yesterday
shifting @ 7k
went thru the lights @ 6500
60ft 1.71
I have the Cal Tracs bars and springs
Thank You all I am happy I finally got in the 12's

Have you had the engine & your carb and headers on the Dyno yet?
If so, scan the Dyno sheet and post it.
Based on the MPH your down of H.P.

When I ran my '74 Corvette I/SA car back in the '90's one of the things I learned with my engine was that the car was much quicker when:
1. Held the car at the line @ 1,500 RPM
2. Flat footed it on the last yellow
3. Made the 1st to 2nd shift @ 5,100 RPM
4. Made the 2nd to 3rd shift @ 5,500 RPM

When I made the switch from a Turbo 350 to a Turbo 200 my car picked up .20-.25

Back then my engine was just a home built adventure and only made 378 HP. It ran ok, but would not come close to running with the guys that had there packages all iron out.
At that time, a good friend and customer, Jeff Stealy (Rest in Peace) was a First Class Stock and Super Stock Engine builder. His engines of my combination which was a 350 with 882 heads,were making 420+ HP.

Other things to look at are brake drag.... you should explore everything, front to back, and make the car roll (push) with as little effort as possible.

[Lonnie Cox]

Originally Posted by Glenn Hayes

Have you had the engine & your carb and headers on the Dyno yet?
If so, scan the Dyno sheet and post it.
Based on the MPH your down of H.P.

When I ran my '74 Corvette I/SA car back in the '90's one of the things I learned with my engine was that the car was much quicker when:
1. Held the car at the line @ 1,500 RPM
2. Flat footed it on the last yellow
3. Made the 1st to 2nd shift @ 5,100 RPM
4. Made the 2nd to 3rd shift @ 5,500 RPM

When I made the switch from a Turbo 350 to a Turbo 200 my car picked up .20-.25

Back then my engine was just a home built adventure and only made 378 HP. It ran ok, but would not come close to running with the guys that had there packages all iron out.
At that time, a good friend and customer, Jeff Stealy (Rest in Peace) was a First Class Stock and Super Stock Engine builder. His engines of my combination which was a 350 with 882 heads,were making 420+ HP.

Other things to look at are brake drag.... you should explore everything, front to back, and make the car roll (push) with as little effort as possible.

No dyno yet, timing @ 39degrees, I will check the converter flash and as for brake drag coming back from the run , I could coast a good distance, but I will start checking the suspension and brakes as well, Thank you all so much. I know with all your expert advice I will get there. I will keep you posted, Any comments on the tire I should run.
Cam is a Bullitt
GRIND CHS311/315H106+4
> MASTERS H311/262 H315270C
> DUR @ .050 263/270
> LIFT .390/.410
> LSA 106
> INT C/L 102

[Dan Fahey]

Originally Posted by Glenn Hayes

Have you had the engine & your carb and headers on the Dyno yet?
If so, scan the Dyno sheet and post it.
Based on the MPH your down of H.P.

When I ran my '74 Corvette I/SA car back in the '90's one of the things I learned with my engine was that the car was much quicker when:
1. Held the car at the line @ 1,500 RPM
2. Flat footed it on the last yellow
3. Made the 1st to 2nd shift @ 5,100 RPM
4. Made the 2nd to 3rd shift @ 5,500 RPM

When I made the switch from a Turbo 350 to a Turbo 200 my car picked up .20-.25

Back then my engine was just a home built adventure and only made 378 HP. It ran ok, but would not come close to running with the guys that had there packages all iron out.
At that time, a good friend and customer, Jeff Stealy (Rest in Peace) was a First Class Stock and Super Stock Engine builder. His engines of my combination which was a 350 with 882 heads,were making 420+ HP.

Other things to look at are brake drag.... you should explore everything, front to back, and make the car roll (push) with as little effort as possible.

Interesting !!
My M/SA 1969 Impala ran a 350/255 with a Turbo and 3800 Stall Conveter.
Shift points were near identical.
Used 5.13s and 28 inch tire.
Woodro Built the Engine
Ran a best of 12.80 in WPB, Florida weather.
Before Woodro ran barely on to 3 tenths over the Index, mostly hot weather.

Always wondered how it would have done on a cold day?

D