Tampa 928s

Does anyone know or has anyone changed the gearing to provide a lower power band. If so what is involved and any feedback on the subject would be helpfull.

Lizard928

you have to replace the ring and pinion gear, however the pinion gear in these trannies/diffs is a single unit with the main shaft so replacement requires pretty much the whole unit to come apart.

FlyingDog

Unless you want stump-pulling low gears or you find a 2.6363 r+p, just swap the tranny.

mark kibort

what specific speeds to you want to opimize your power band for? (eg: 40-80, 60-120mph, etc)

you may be "optmized" now, and dont even know it!

Scott M.

Is now the right time to say it??


Oh what the heck...



3.09!!






I just love messing with Kibort.

6.0-928S

Everyone knows that installing a 3.09 ring & pinion creates an inverted vortex & damages the novertrunions & that slows the car down!!!

Hammer

Jim bailey - 928 International

but the critical aspect is the contact patch...

Scott M.

And on a more serious note (for once)... Gary, shot Dr. Rick Carter a PM. He had an 89 4 spd in his 85 for awhile. He could give you an honest assessment.

BTW Sterling, I have 3.09, sport seats and a GTS rear (gears, contact patch and seats) do I win?

mark kibort

I have the 2.2 and won

Lizard928

if you look at his signature you will see he has a 5 speed.

PorKen

Easier to advance your valve timing a bit for more low end. Plus, you'll still have a first gear.

mark kibort

After all the pages of discussion and misunderstandings, it boils down to this. (if you missed that discussion)

Look at the MPH you reach in each gear at max rpms. Knowing that your max acceleration potential at ay speed will be at max power (i.e. acceleration = power/(mass x velocity) , find a gear box that hits the speed ranges you want to run at, and allows for the most amount of power for the longest amount of time possible.

Back to Hammer's signature line: Do you love me or hate me?

mk

Shane

Put a Euro '86 ring and pinion (2.72) in your US box, that will give you gears in 1-4 very close to what Scott has in his 3.09 equiped GTS, but gives you a taller 5th gear which would be the same as a GT (2.73).

PN for Euro 2.72 = 928.302.911.55

This is what the one of the previous owners of my second 5sp did to the car. I'm impressed with the way it runs!!

6.0-928S

[QUOTE=,
Back to Hammer's signature line: Do you love me or hate me?

mk[/QUOTE]

First of all, I hate no man.
Second, I haven't been corrected.

Hammer

Tampa 928s

I did read a lot of posts and it seems that the change would max out first gear and not change much on the other gears. I was looking for a more bang for the buck for off the line with out supercharging. My reading gave me the impression that gear changes are not the way to go.