i need some opinons with gearing

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chpcamaro
Posts: 773
Joined: Sun Nov 09, 2008 1:28 am
Location: socali

i need some opinons with gearing

#1 Post by chpcamaro » Sun Nov 09, 2008 12:50 pm

ok lets start with saying hello to everyone.
alright here's my setup
1)572 making around 1000hp i'll know exactly after i dyno it i'm figuring my high rpm will be 7500
2)power glide i don't remember if it was 1.80 gear or 1.76 my paper work is at work
3)tires 29.5 10.5 15w
4)and i am running a 12bolt/35 spilne axles
5)car weight with driver 2800
6)and i run 1/4 mile 80%of the time
7)i'm not running the bottle if it runs what i think it will but i will run it later but at that time i will make changes for gears but right now i just need a set up for no bottle.
8)ok i can't make up my mind if i need to run 4.11 or 4.56

some more input the reason i am having a prob with this is i came from a 18 dregee SBC with 850 hp
and i am so use to running low gearing that these gears seem rediculously high lol but i know the torque is going to way lower with the BBC
so any input would be greatly appreciated
thank you
rob :thumb:
best to date N/A 8.91@153
psca westcoast heads up racing open comp
67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com

sc racing
Posts: 1773
Joined: Sun Jun 11, 2006 1:45 pm
Location: Sahuartia Az

Re: i need some opinons with gearing

#2 Post by sc racing » Sun Nov 09, 2008 1:41 pm

Depending on the alltitude you race at I would think your car should go around 160-164 mph and with some tire growth and conv slippage to go thru the traps @ 7500 you would need a 3.89. You should dyno first get your rpm info then buy gears IMO

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chpcamaro
Posts: 773
Joined: Sun Nov 09, 2008 1:28 am
Location: socali

Re: i need some opinons with gearing

#3 Post by chpcamaro » Sun Nov 09, 2008 2:24 pm

thank you sc racing
yea i just wanted to get a idea you know the more you read the more confused you can get lol.
but i will wait for the dyno numbers before i buy anything and i will post those results
thank you once again
rob


p.s. altitude changes but i would say 1000ft socali ok that looks better
Last edited by chpcamaro on Mon Nov 10, 2008 12:11 am, edited 1 time in total.
best to date N/A 8.91@153
psca westcoast heads up racing open comp
67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com

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sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: i need some opinons with gearing

#4 Post by sc68z28 » Sun Nov 09, 2008 11:14 pm

chpcamaro wrote: p.s. altitude changes but i would say 500ft socali
Rob, 500 ft :scratch: Where :?:

Nice car.

---Bill.
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

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chpcamaro
Posts: 773
Joined: Sun Nov 09, 2008 1:28 am
Location: socali

Re: i need some opinons with gearing

#5 Post by chpcamaro » Mon Nov 10, 2008 12:05 am

just a guess i know it's more then that that i run at fontana which i sure your have been to being in riverside i'm in ontario. do you run any class. and after seeing your video i know you run there lol.
very nice car your self sound real nice to i probably have seen you there also might even know some of the same people.
thanks
rob
best to date N/A 8.91@153
psca westcoast heads up racing open comp
67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com

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sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: i need some opinons with gearing

#6 Post by sc68z28 » Mon Nov 10, 2008 9:29 pm

chpcamaro wrote:i run at fontana
do you run any class.
Ok Rob, Fontana is what I saw in your pic. Just didn't know if I was missing something.
The D/A there in the summer can reach 5,000 feet, better this time of year at around 2,500'.

I do not run any class at this time, still learning how to drive it :oops: I need seat time bad, the car is better than me right now.
Would like to run PSCA Quick street, (9.60 index heads up) http://www.pscaracing.com/Rules/rules_08_quick.html

What about you? Is yours going to run a class?

---Bill.

PS. I also visit the boys over at Westech, Steve, Ernie,... and still see Tom at the track from time to time.


Image
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

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chpcamaro
Posts: 773
Joined: Sun Nov 09, 2008 1:28 am
Location: socali

Re: i need some opinons with gearing

#7 Post by chpcamaro » Mon Nov 10, 2008 10:08 pm

i have been running with psca for along time but work has me so busy that i can't get out and run my car or class. i started with hot street then moded the car more and put myself out of my class so now i am just running open comp till i figure out what i want to run ith my new set up but the cars has been down for a while i will be getting my new motor to steve in the next few weeks to dyno it. next week i will be there also dynoing a blown akly dragster motor for a customer so he can start running his dragster and i can start working on my own car.
rob :thumb:
best to date N/A 8.91@153
psca westcoast heads up racing open comp
67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com

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