What will go in our 3.8's if your running 350+ hp?

[SLOWBRAEATER]

I was told by a guy who specializes in the gn turbo 3.8 and he said our 3800 series 2 is about as strong im sure he knows what hes talking about

[Perry V]

how much power does the GN 3.8 turbo put out...??

[Mighty Thor]

It's safe to say that you have the most strongest cylinder block in the world. The crank according to Hemming is rated to hold up to 400 hp. The crank on a 4.1 buick is rated much higher. But yeah you do need to change your rods, push rods, pistons, and such.

I'm thinking of doing the same thing too. But I'm doubting SSM heads because just about everybody that gets them seem to run into problems of some sort. I'm thinking of ZZperformance heads. Maybe not as good but so far its been good to alot of people.

[Bliggida]

The Turbo Gran National put out anywhere from
200 horsepower at 4000 RPM and 300 ft-lbs. at 2400 RPM.
to
245 HP at 4400 RPM and 355 ft-lbs at 2000 RPM

The GNX however had a power output of 275 HP and 360 Ft-lbs.

For reference, the 2003 Corvette's LS6 is rated at 360 Ft-lbs. The GNX accomplished this back in 1987 with a turby-six.

[camaro_speedemon]

<blockquote>quote:</font><hr>Originally posted by naptown:


Umm if im not mistake the dyno resaults from a 6lbs charger put an extra 100rwhp plus that with a 45-50rwhp ssm package(with optimum pcm performance) im thinking that would put him at about 330rwhp because stock i think our cars have about 170rwhp I could be way off but I thought i would add my $.02<hr></blockquote>

I it's the 9 PSI version that pushes 100RWHP increase. I would think that your pistons and everything should be alright, but I personally would go out and upgrade the pistons. The tranny, from what I have heard would most likely need to be beafed up a little to handle that kind of power.

[megathumpzilla]

t5 wil not take it, it'll grenade if you make that much power. Best that could happen is you will start loosing gears as the cheesy shifter forks tweak, worst is it will lock up att full throttle and I shudder to think what that would do.

[jmorgan]

you dont need new pistons you dont need new rods your stock motor will be fine as long as you are not detonating
Things to reduce or stop detonation:
better fuel
less timing
more fuel

you would probly need a new clutch

a new fuel pump would be recommended just to make sure you can get enough fuel in there, besides FI like alot of fuel

and do what you have to do to get 9 lbs working

nocutt is running stock motor with a 11 psi turbo and i know that turbo is putting a hell of alot more power down then your powerdyne will ever

like i said your block, rods, and pistons are fine

[Perry V]

Really? that was a shocking post.... so u think @ 6 lbs of boost (possible upgrade to 9) and the supersix pkg.....with expected output of approx 350 hp at the crank...that the stock motor (i.e. pistons, rods, tranny etc..) will have no problem handling that? I agree with the fuel pump....but wouldn't i need to get larger injectors as well?? also... wouldn't u think the least i could do is replace the rods....those seem to be the easiest thing that'll go...... how long has your buddy been running that turbo setup on stock internals? and how much hp do u think he's getting up to at the crank??

thanks for the help bro

[pgriffith]

<blockquote>quote:</font><hr>Originally posted by megathumpzilla:
t5 wil not take it, it'll grenade if you make that much power. Best that could happen is you will start loosing gears as the cheesy shifter forks tweak, worst is it will lock up att full throttle and I shudder to think what that would do.<hr></blockquote>

Probly not. The rear end would go first.

[SLOWBRAEATER]

Jason how can you say that an 11 psi turbo will put down way more power than a powerdyne sc? Doesnt stefan or someone here have something so you can run higher than 9-10 lbs of boost? Im sure there is a way to run more than 9 lbs.

[strobhen]

I do not think you need to go insane on the internals.

While you already have the engine apart for the supersix, now would be a great time to upgrade. But you could get by without doing so.

First off, putting the supersix package on your supercharged car may lower the boost your engine sees (your engine becomes a more effective air pump thus lowering boost). By how much, I do not know, but it will help with blow-by & heat issues. New pistons and especially a new crank are simply not necessary.

A better fuel pump is a good idea, as is something to monitor your O2 readings (like autotap). Perhaps even a maft+ to do some tuning.

Long as you keep an eye out for detonation, you will be fine. Tranny will need a new clutch. And you are going to have a much better chance of damaging the differential. But that's a fix it when it happens deal.

[Morgan]

Originally posted by Bliggida:
Same/same. I have a 3800 series 1 3.8L in my garage. Block is identical to the GN motor. Internals are different, heads, intake, cam are all different but the block is the same, except for the corporate bolt pattern on mine. (I believe) I'm building it to GNX specs.

"I'm building it to GNX specs"...?? How are they different vs. the GN/TR's specs?

Mighty Thor-- there's a car hangout every Saturday morning from 6-8 AM in Huntington Beach at the corner of Adams & Magnolia. The turnout has been very heavy the last few times and there's lots to see, so it might be worth a trip if you live near OC. If you see a GN there with chrome bumpers & Weld wheels, that'll be me.

[Tiago]

ok whoever said the GN engine and the ones in the 4th gen are the same has it all wrong, it has been established before that the only thing equal between the two is the displacement. STefan tryed to run the gN internals, it doesn't work, parts are not interchangeable.

now your 3.8s are also quite strong I believe, on my turbo project I plan on running 9-12 psi on it, its a daily driver/track car respectively on teh boost figures. shoudl be ready to roll soon.

there is no secret, just gotta get to work, hopefully oncee our turbo 3.8 is done peopel will see real potential in it, look at what I did with my car ;)

[Bliggida]

...I made the comment that the series 1 3.8L such as in my 1986 Oldsmobile Ninety-Eight, is the same as a 1986 Buick Gran National 3.8L. And I clearly stated that everything was different as far as internal components, that only the blocks were the same.

The GNX vs the GN/TR was just the last year for the Turbo Gran National. 1987. They simply built or put more horsepower into that 3.8L than any 3.8L ever built by GM before or after. My engine won't be to exact specs, but just as a referance that it will make the minimum of 275 horsepower and 360 ft-lbs of torque. And probably more like 300 horsepower and 400 Ft-lbs.

[Kelly Rosato]

Sounds like its time to build an adapter plate and put a T56 in it with a Moser 12 bolt rear end. LOL