Six speed / 2.87 gear

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Jan 4, 2016 | 05:45 PM

#21

forvicjr

Thread Starter

Burning Brakes

Joined: Jul 2009

Posts: 1,132

Likes: 14

From: A town SC

1st would just blow the tires off. At a hard start starting in second was more affective with the five speed. I dont want the same with this six speed install.

Jan 4, 2016 | 05:50 PM

#22

gkull

Team Owner

Joined: Apr 1999

Posts: 21,953

Likes: 1,445

From: Reno Nevada

2024 C3 of the Year Finalist- Modified

i did a lot of calculations with over drive trannies. 4.11 for over 20 years in my Vette. You just figure out top gear and the rest just fall where they are. I really believe that 3.90 is about ideal when you have .70 .64, and .62 OD ratios

As my power went up so did my tire width. I also tried to attain 40% front and 60% rear weight. The rear differential has to attached so it can't move. You have to replace or mod the rubber mounted diff cross member. You have to run big rear spring weights to put the power to the ground.

Last edited by gkull; Jan 4, 2016 at 05:55 PM.

Jan 4, 2016 | 06:33 PM

#23

forvicjr

Thread Starter

Burning Brakes

Joined: Jul 2009

Posts: 1,132

Likes: 14

From: A town SC

40/60 front rear prob wont happen with an iron headed big block for power.

Jan 6, 2016 | 09:47 PM

#24

tixeon

Burning Brakes

Joined: Feb 2008

Posts: 1,168

Likes: 17

From: Iowa

Quote:

Originally Posted by forvicjr

215 75 15. These tires are somewhat temporary. Plans are 315 30 18 on a 18x10.5 on all four corners. These would be 25.4 inches tall.

What all will you have to modify to pull this off?

Jan 7, 2016 | 08:59 AM

#25

forvicjr

Thread Starter

Burning Brakes

Joined: Jul 2009

Posts: 1,132

Likes: 14

From: A town SC

Quote:

Originally Posted by tixeon

What all will you have to modify to pull this off?

From what Ive read these will tuck with no flares with little tire rub.
Search "18x10 295/35 all four corners"

Jan 7, 2016 | 09:19 AM

#26

bashcraft

Le Mans Master

Joined: Jan 2006

Posts: 6,506

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From: Butler Pa

Quote:

Originally Posted by forvicjr

215 75 15. These tires are somewhat temporary. Plans are 315 30 18 on a 18x10.5 on all four corners. These would be 25.4 inches tall.

These tires are going to look horrible. They're way to short.

Jan 7, 2016 | 11:50 AM

#27

forvicjr

Thread Starter

Burning Brakes

Joined: Jul 2009

Posts: 1,132

Likes: 14

From: A town SC

Quote:

Originally Posted by bashcraft

These tires are going to look horrible. They're way to short.

I will be lowering the car. the 18s are comparable to a 245 60 15 which I have had on the car.

Jan 8, 2016 | 09:21 PM

#28

Gale Banks 80'

Safety Car

Joined: Nov 2008

Posts: 3,720

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From: Seattle Washington

245 60 15 is 26.6 diameter or very close to the 27" diameter C3's left the factory with. Not 25.4 ". Its going to look like it has go kart tires on it.