Thread: 10:1 On Boost?

With the right setup( hp goal?) you can boost without any probs on 93 15-6lbs.
The key its a good tuned ecu.
Cheers.

Boost it up mine loves and I mean loves 18psi. All you need to do is make sure there is no detonation. I had a problem with that for a little while so I had to keep the boost down to 14psi but now I have it holding 18psi. The most important thing is the tune and timing like everyone else said. I can't tell you any long term effects I only ran it for about 3 weeks and had to park the car to go to college.

Is there any proof of this? I mean a 10:1 motor is suppose to be 150hp right? And the 9.5:1 one is 140 so doesn't the high compression give the extra 10 crank hp? I doubt the 10:1 intake cam is any bigger then a 91 high port. I know they are suppose to have sodium filled exhaust valves just like the det's do, but that and the flat top pistons are about it IMO.

I call bs on this until I see some proof! I am a skeptic

^^^Agreed I have the motor and a few other heads with cams I think bs also.

well i think the motor we just go for my buddy is a 10:1 motor, it came with a tubular header and the goldish valve cover with black center, havent check the head codes but i believe one of the 10:1 motors falls under this description plus i wouldnt doubt if it had a bit more aggressive cam, the motor idles like it does, With just intake, header, exhaust in a full interior b13 this motor pulls. It revs up sooo fast as well, I have the timing at probably only 17 deg or so so i know i can bump it up a bit more as well.

But just the way it idles i would think it does have a bit more aggressive cam.

I had one.



On the dyno it pinged a bit at tq peak but still wanted timing up top. From what I've seen good A/F and less back pressure are te key. In fact thats what a lot of smart people told me. That's 10psi and up top the internal wastegate fluttered so it got all wavy. Done at unnatural last April on a very rainy day. Cool and humid.

UK highport 10:1. GtiR T28 kit, 370s @4-bar N60 set up blow-thru, 3" turbo back FMIC.

I burned a rod bearing at PIR. WOT in 4th the bolt walked off my rotor/distro.

I was running a 10:1 with boost for a while with a gt2871r and s4's, ran great 10 psi on pump did 270whp on a superflow dyno(lower #'s than dynojet) with a 2.5" turbo back at 13 deg. timing. I never got to dyno when i upped the boost, i had an injector failure at 20psi. I can post a pic of the one melted piston.

To confirm the cam argument, i personally had 3 sets of highport cams and the 10:1 cams at my shop and from what i could tell the 10:1 cams were a bit more agressive. I never got a chance to actually measure them before i sold them.

That doesn't confirm anything. Show me a measurement of a 91 highport cam and and 10:1 cam, then I will believe it. I drove around in a 10:1 car and it didn't feel any different then my 178k mile 9.5de. Maybe a tad more power almost like adding a intake or something.......

thanks guys! very useful info here.
im still debating on either boosting mine
or just getting a turbo motor.

If you know what you are doing Boost your concurrent motor... ad some alky and be done with it.