Getting Horrible MPG's

[Croustibat]

Originally Posted by spartan

well it does look like signs of track use but when i say beaten up i meant like paint wise. everything else is in pretty good condition. lol why does greddy manifold make it more signs of rice?

Because it costs an arm and a leg, and nets 0 gain, unless the engine is already past 450/500HP.

Originally Posted by Rb26kouki

[...]
I did a compression test before I replaced the turbo & gaskets it read 160-160-142-160
[...]
Still trying to find the problem

Cylinder 3 on its way out ... compression should be 150psi max, so it is likely the engine has been rebuilt and head was skimmed without a thicker headgasket. Or the compression tester is off.

Try doing the test again on cylinder 3, if compression goes back to normal after some tries you are likely to have worn / sticking valve. If it does not though, check cylinder 3, piston, bore and head for det damage. These engine usually kill the 3rd cylinder first around ringland.

[codyace]

Originally Posted by Croustibat

Because it costs an arm and a leg, and nets 0 gain, unless the engine is already past 450/500HP.

I disagree. I believe they are a great addition to any 28RS or 2871r or larger turbo'd SR20. A good friend of mine went from a similar setup as mine and lost a smidge of torque down load (below the usable turbo area mind you) and netted much more HP and torque from 4500rpm+ over the stocker setup.

I wouldn't run it on a stock turbo type setup, but anything beyond that, coupled with nice cams, is a perfect setup if you ask me. I could care less abotu 2500-3500 rpm, the only time i'm there is during mundane driving...whereas when I'm having fun I never drop below 4500 rpm.

[Croustibat]

Originally Posted by codyace

I disagree. I believe they are a great addition to any 28RS or 2871r or larger turbo'd SR20. A good friend of mine went from a similar setup as mine and lost a smidge of torque down load (below the usable turbo area mind you) and netted much more HP and torque from 4500rpm+ over the stocker setup.

I wouldn't run it on a stock turbo type setup, but anything beyond that, coupled with nice cams, is a perfect setup if you ask me. I could care less abotu 2500-3500 rpm, the only time i'm there is during mundane driving...whereas when I'm having fun I never drop below 4500 rpm.

The $$$$/HP gain ratio of these is ultra high compared to the $$$$/HP ratio of a bigger turbo, cams or any item that really increase power, that is what i meant. I mean ... they cost 1000$+ delivered. For what ? increased low end torque ? No thanks.

[Tom N]

Originally Posted by Croustibat

The $$$$/HP gain ratio of these is ultra high compared to the $$$$/HP ratio of a bigger turbo, cams or any item that really increase power, that is what i meant. I mean ... they cost 1000$+ delivered. For what ? increased low end torque ? No thanks.

I would think the manifold would lose low end tourque in favor of more top end hp.

On a 2871 and smaller turbo I would think a extrude honed intake manifold would be benificial.
Especially at widening the power band.

[Croustibat]

Originally Posted by Tom N

I would think the manifold would lose low end tourque in favor of more top end hp.

On a 2871 and smaller turbo I would think a extrude honed intake manifold would be benificial.
Especially at widening the power band.

The greddy mani is just a cast aluminium manifold.

[Tom N]

Originally Posted by Croustibat

The greddy mani is just a cast aluminium manifold.

I'm aware of that. I guess I need to be more clear. When I said a extrude honed intake manifold I am meaning a extrude honed stock intake manifold.