70's 3.8l

[epsilon2322]

What's the difference between the 70's 3.8l and the 3.8l series 2? Also is anything interchangeable?

[Shad0wguy]

Re: 70's 3.8l

Same displacement, different series motor.

Same reason we cant use the turbo from the 3.8 out of a Grand National.

Short answer, no.

[LETZRIDE]

Re: 70's 3.8l

I thought we could use the turbo out of a grand national, but it was good luck finding one, and if you do...restore the damn thing...

[ViperRider]

Re: 70's 3.8l

I can't imagine a 3.8 from the 70's being as efficient and putting out as much power as one from the 90's.

[epsilon2322]

Re: 70's 3.8l

yeah, thats what I was thinking. Thanks for the help

[epsilon2322]

Re: 70's 3.8l

ViperRider check out http://www.hotrod.com/techarticles/e.../photo_23.html. Something to slowly build too.

[ViperRider]

Re: 70's 3.8l

ViperRider check out http://www.hotrod.com/techarticles/e.../photo_23.html. Something to slowly build too.

700 horsepower? :eek:

[Shodown]

Re: 70's 3.8l

I can't imagine a 3.8 from the 70's being as efficient and putting out as much power as one from the 90's.

Buick GN's can produce TONS more power than any car on this site ;) Thats partially why they can run 11's without breaking sweat and why so many can run 8's and 9's.

[LETZRIDE]

Re: 70's 3.8l

Buick GN's can produce TONS more power than any car on this site ;) Thats partially why they can run 11's without breaking sweat and why so many can run 8's and 9's.

why is that though?... I thought we were supposed to have a revised version of that engine, therefore it is more efficient.

Why is it that GN's can make soo much power, but even guys who turbo our cars can't make that kind of power without breaking a sweat...

[Shodown]

Re: 70's 3.8l

why is that though?... I thought we were supposed to have a revised version of that engine, therefore it is more efficient.

Why is it that GN's can make soo much power, but even guys who turbo our cars can't make that kind of power without breaking a sweat...

Gee, I thought you'd know this. You seem to be the resident expert.

20+ years of R&D, large aftermarket industry, better intake manifold, stock turbo manifolds to work with, it was specifically made for FI etc.

Plus, at the time that they came out they were faster and made more power than anything GM, Ford or Mopar had to offer with 276 hp (which was underrated). Thats more power than the vette's were making in the 80's. So being at the top of the food chain, it got lots of attention from people who wanted to go fast thus creating a solid aftermarket with R&D. What is at the top of the food chain today? The cars with LS1/2/3/6/7 motors. Who gets all the attention for aftermarket and R&D? The cars with LS1/2/3/6/7 motors in them. See how that works?

They are also faster at the strip because they are lighter than the Fbody and can accept such transmissions like the turbo 350, 700R4, Powerglide etc. Do you know what those have in common? They can use a trans-brake. I only know of one V6 Fbody with a brake and its Tim King's race car. A brake is possible for our trannies, but its very costly.

[LETZRIDE]

Re: 70's 3.8l

Gee, I thought you'd know this. You seem to be the resident expert.

20+ years of R&D, large aftermarket industry, better intake manifold, stock turbo manifolds to work with, it was specifically made for FI etc.

Plus, at the time that they came out they were faster and made more power than anything GM, Ford or Mopar had to offer with 276 hp (which was underrated). Thats more power than the vette's were making in the 80's. So being at the top of the food chain, it got lots of attention from people who wanted to go fast thus creating a solid aftermarket with R&D. What is at the top of the food chain today? The cars with LS1/2/3/6/7 motors. Who gets all the attention for aftermarket and R&D? The cars with LS1/2/3/6/7 motors in them. See how that works?

They are also faster at the strip because they are lighter than the Fbody and can accept such transmissions like the turbo 350, 700R4, Powerglide etc. Do you know what those have in common? They can use a trans-brake. I only know of one V6 Fbody with a brake and its Tim King's race car. A brake is possible for our trannies, but its very costly.

I'm no where near an expert on anything (yet)...That does make sense though...never really thought about it as they have a much bigger aftermarket then we do.

what do you mean trans-brake? what is that?
and what is R&D?

[Shodown]

Re: 70's 3.8l

what do you mean trans-brake? what is that?
and what is R&D?

R&D = research and design

Trans-brake = locks 1st gear and reverse together thus making it able to rev up to the allowed stall RPM. It makes it possible to launch at high RPM's which is ideal for a turbo car so they can build boost on the line.

In drag racing, a transbrake is a setup installed in automatic transmissions which selectively places the transmission in first and reverse gears simultaneously, effectively holding the race car stationary as if the foot brake was applied. The transbrake is activated by the driver by applying electrical current to a solenoid at the transmission. With the transbrake engaged (transmission locked), the engine throttle can be increased to any position (opening) in preparation for launch without the race driver worrying about the car creeping forward. Milliseconds before the green light illuminates on the Tree the transbrake is released (by the driver releasing an electrical switch or by a delay box "timing out" originally triggered by the driver releasing an electrical switch) and the car launches forward, it's engine already in the higher power band and the transmission already in low gear.

[LETZRIDE]

Re: 70's 3.8l

so would you get the same result from a stall and a line lock?

[Shodown]

Re: 70's 3.8l

Absolutely not. The foot brakes of a car will not hold the car back at high RPM's like that, the car will push thru the brakes AkA "pushing thru". The transbrake makes it mechanically impossible for the car to move until the driver lets go of the button.

I have a line lock and 3200 stall and I can still only get my RPM's to maybe 2200 before it starts pushing the car forward.

Guys with manual trannies will sometimes use a line lock to launch but they can play with the clutch simultaneously.

[LETZRIDE]

Re: 70's 3.8l

Absolutely not. The foot brakes of a car will not hold the car back at high RPM's like that, the car will push thru the brakes AkA "pushing thru". The transbrake makes it mechanically impossible for the car to move until the driver lets go of the button.

I have a line lock and 3200 stall and I can still only get my RPM's to maybe 2200 before it starts pushing the car forward.

Guys with manual trannies will sometimes use a line lock to launch but they can play with the clutch simultaneously.

interesting...I always thought if you had a 3200stall you could rev to 3200 without the car moving forward (while on the brake of course)

so would that transbrake not significantly reduce the life of the transmission, among other things since it simaltaneously holds the trans in 1st and reverse?