what can a gsr motor take

[mikeowen]

can a gsr motor take a supercharger with 8 psi and a 50 shot of nos? well a better question is what is the cheapest most reliable way to make a 95 civic with a gsr motor run 12's

[G_racer]

It would handle it fine if you set it up right but building up the motor would be a better choice to handle the boost if you want to boost higher.

[Jarflow]

could run 12's, my friend has a 100 shot on his 92civic si and he has a b18c swap and ran 13.3's with full interior on slicks

[M-type]

the b18s could handle 7-9psi for about 30,000 miles then they starts to give you problems. I wouldnt recommend anything higher than 9 psi. Talking about NOS, if you run it enought times your valves, valve springs and cylinders will become one nasty looking piece of metal. Aluminum engine + NOS = bad idea. i got pics. i'll post them if i can find them.

[JD@af]

CAREFUL tuning and you'll be good with 8 lbs and a 50-shot. Just tune carefully before you use the N2O, and don't squeeze it too much. I agree that valve springs and retainers are a good idea to change out before trying to run the set up, and if you can afford to rebuild the bottom end, it's definitely not a bad idea, though I wouldn't call it a necessity. And I'm pretty sure that if your hatch is.. say about 2,300 lbs or less, you tune the motor right, and you can race well, you should be in the 12's.

[j.fuggi]

Originally posted by M-type
the b18s could handle 7-9psi for about 30,000 miles then they starts to give you problems. I wouldnt recommend anything higher than 9 psi. Talking about NOS, if you run it enought times your valves, valve springs and cylinders will become one nasty looking piece of metal. Aluminum engine + NOS = bad idea. i got pics. i'll post them if i can find them.

are you talking about stock internals or a built motor giving problems at 30k miles?

[JD@af]

Originally posted by j.fuggi


are you talking about stock internals or a built motor giving problems at 30k miles?

From what I know, he is probably referring to a stock motor. The botttom end of built B18s should be fine as long as they have the ring gaps prepped correctly for long term usage.

[mikeowen]

so what all would need to be done to make it more long term?

[JD@af]

Originally posted by mikeowen
so what all would need to be done to make it more long term?

For long term use, an engine should have larger tolerances between the rings and cylinder walls, to allow for a more gradual break in. However, this also means that a careful break in period is necessary to prevent engine damage. For a race motor, you can use tighter clearances (for example total seal piston rings, which should never find their way into a street motor), and hit the engine harder without any break in at all in some cases, but the trade off is that there is fewer miles before a rebuild is needed.