Maximum boost?

[TiredGXP]

http://www.fiero.nl/forum/Forum2/HTML/103956.html#p3

Iron head 2.8, 20 lbs of boost making 440 tq and 380 hp to the wheels

[2.8/3400 1985 Camaro]

That's enough boost/airflow to make baby Jesus cry! And they make turbos that will support that and spool fairly well, huh? Craziness... Just make me a promise if you build it. You will take it to the next meet and I get a ride, lol.

Lol, its going to be a very long time, and lot of money in the making, I need almost a grand just to get the engine running again on N/A, about 2 grand in other things like exhaust, headers, windshield, tires, to make it legal. And 1 more grand to make it relatively nice/nice looking. And currently I have some money issues really stinting my progress. To do the turbocharging, it would be probably 4 grand just to prep the engine, add another 2-6 for turbo/s and components...you get the idea, and like I said, money issues, atm I can't even finish the engine.

[bszopi]

Well, if that's the case, then I'll let you know when I get done...

[2.8/3400 1985 Camaro]

I've always found it funny that mustang owners put chevy's under the hood :P I rip on mustang owners all the time about it,lol, to be fair though a decent many chevy guys use ford rear ends...

[robertisaar]

it's tough to beat a ford 9", especially for the price and how common they were. GM-12 bolts were similar in strength, but not too common...

[2.8/3400 1985 Camaro]

Pretty much

[DefEddie]

A guy on Pennocks is running 20 psi on a 2.8 block and getting 400ish hp and over 400 ft/lbs.
His only issue is head gaskets (he's using stock gaskets/bolts).

http://www.fiero.nl/forum/Forum2/HTML/103956.html

*oops,turbogxp beat me to it.

[Schmieder]

It may not be as accurate as a dyno but my logs show 310 lbs/ft at 5 psi in my 3100. And that is with torque management set to 280 max. Timing gets pulled to -12* by the time it hits 310. I could probably get more but i don't want to blow my tranny.

I did smooth the short side radius and make flush the hang over just behind the valve seats in both intake/exhaust pockets.

I also removed casting defects in the Plenum and LIM.

I added 1mm radius where the Plenum meets the LIM and tapered that 1" into the LIM. Hoping to increase air velocity with the turbo.

My throttle body was heavily ported. I removed the top bar holding the throttle blade, tear dropped the blade edges, increased the funnelling radius in front of TB and flushed the blade screws/ sunk the screw heads 50%. I also put golf ball texture in specific areas to reduce turbulent drag into the TB's blade area.

Not to be off topic too much. But at 5psi with minor porting I loose traction easily at WOT.

Maybe the best question is how much PSI can a 3x00 push before all traction is lost, lol.

I would LOVE to turbo a 4 wheel drive trans with really sticky tires

[2.8/3400 1985 Camaro]

This is why RWD is better :P I could just put one huge tire running the width of the car on there...bit of an exaggeration, but you get the idea, because some cars are pretty close to that,lol.

[DefEddie]

Width isn't your big issue on most street cars,tire composition and downforce is.
Check out this article in HotRod,great read.
Twin turbo mustang in the 11's owned by a jet engineer from garrett/honeywell that runs 215 series tires.
Great article about turbo's over superchargers,the tire/launch stuff is near the end.

http://www.hotrod.com/techarticles/turbo_tech_q_and_a_supercharger_comparison/index.html

[ForcedFirebird]

A guy on Pennocks is running 20 psi on a 2.8 block and getting 400ish hp and over 400 ft/lbs.
His only issue is head gaskets (he's using stock gaskets/bolts).

http://www.fiero.nl/forum/Forum2/HTML/103956.html

*oops,turbogxp beat me to it.

Head gaskets will be your fuse

Loner had spikes as high as 21psi a few times by mistake, but consistently ran 12+. Traction and transmissions were the issue. He has severe duty gaskets and head studs. I'm thinking about going and getting the car to build a better manifolds, and have something to go from to fabricate more...

[2.8/3400 1985 Camaro]

Head gaskets will be your fuse

Is, that directed at me, and if so what do you mean by it? I have stainless steel MLS cometic gaskets...or will after the finish revising them and send them...

[robertisaar]

since fuses are used to stop to much amperage from running through an electrical circuit, i think it's safe to say john meant that if you try going too far, your headgaskets are going to blow.

[90BlueZ]

Having head gasket as a mechanical fuse is a really bad idea tho, as when head gasket blew, they can fuck up a bunch of other thing (coolant in turbo bearings is not good).

[Schmieder]

Having head gasket as a mechanical fuse is a really bad idea tho, as when head gasket blew, they can fuck up a bunch of other thing (coolant in turbo bearings is not good).

I guess its better then a rod shot through the oil pan with a half melted piston...lol

But yeah, water in the oil is a real problem. Especially for the turbo. One advantage to an isolated turbo oil system.