Auto's with GForce ECU upgrade

there are a few for sale in the for sale section. And im sure if you dont have the gas all the way down, it will shift out befor 8500(or whatever you have it set too)

From what ive heard from 2 people who have singles and raised revs (past 8000), the tranny shifts itself, not really dependent on the rev limit. Its more a precautionary measure, just in case it shoots up a few hundred rpm high in first or something, it wont bounce off the rev limiter like mad.

I have a sc61, stock tc, G-Force ecu w/ 8450 rpm limiter...to be honest I never even get close to the limiter more like 7400 is as far as i go. The reason I purchased one is because at 124mph I was real close to the stock rev limiter!!!

1slow93turbo said:

I have a sc61, stock tc, G-Force ecu w/ 8450 rpm limiter...to be honest I never even get close to the limiter more like 7400 is as far as i go. The reason I purchased one is because at 124mph I was real close to the stock rev limiter!!!

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I am very curious about this subject also. You Gforce ECU is raised to 8450, but the highest you go is 7400. Is that when the car manually shifts or is that when you shift it? I am just curious to know if the tranny takes over and how high? I want to get mine raised and remove my boost cut. Where would I send it? And how much do you suppose it costs?

Thank you in advance,

Kevin

It depends on the tranny. Most built trannies with stalls will shift a little higher in each gear. And the more power, the higher it will likely shift. But I've never seen mine shift higher than 7100.

Would a GForce benefit a BPU+ car on a stock tranny and stall?

So lets say I bought a G-force with a 8000rpm rev limit. Should I be concerned about my stock valves/springs/retainers or will the car shift early enough to avoid any problems?

Supralative said:

Would a GForce benefit a BPU+ car on a stock tranny and stall?

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Only real benefit i would see is in 3rd gear, so maybe you can go to ~145mph befor overdrive kicks and and the Viper/zo6 starts to pull you.

VeilsideTT said:

So lets say I bought a G-force with a 8000rpm rev limit. Should I be concerned about my stock valves/springs/retainers or will the car shift early enough to avoid any problems?

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Id be more worried about the lame stock oil system.

sorry I didn't realize what you were after!! I manually shift mine by 7500 ish , I have stock stall also, my problem was I was crossing the traps in 3rd almost on the stock rev limiter when I hhad stock twins and NOS=no good. I love my g-force because the stock tranny WILL start shifting slower which is when the g-force comes in handy. It will let the tranny shift a little slower at high RMP'S and not hit the rev.

VeilsideTT said:

So lets say I bought a G-force with a 8000rpm rev limit. Should I be concerned about my stock valves/springs/retainers or will the car shift early enough to avoid any problems?

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I have heard from several sources that 7800 rpm is a good limit for a 100% stock engine. Going past 8000 rpm is an excellent way to float your valves, 8450 rpm is suicide.

A BPU car typically peaks for HP around 5500-5800 rpm and holds nicely until about 7000 rpm, when power starts dropping fast, and torque goes down like a torpedo! So if you rev a gear out to 7800 rpm, you end up in the next gear way past your torque peak, not a good idea. A big single turbo with cams will make the most out of higher rpm, but forget about it with the twins.

Nase, please explain more about the stock oil system.

Drift, I have a 67GTQ so I'm wondering if that is big enough to take advantage on stock cams. I bet I would at least need to go from my .68 to a larger exhaust housing.