turbo charging NA's
02-24-03, 01:13 PM
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turbo charging NA's
I was wondering if anyone out there would know how much boost I could run with a factory fuel system before I start leaning out. As well, aproximatly how much hp would I be pushing getting close to this limit.
02-24-03, 01:40 PM
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With a full TII fuel system, I lean out at anything over about 8-9 lbs at 5000 rpms.
This sucks considering I've seen up to 13 lbs.
My engine is being rebuilt right now, and I'm puttting in an FD or walbro pump, and bigger secondaries for sure.
I wouldn't even consider doing it with a stock NA system. A turbo putting out 200 hp uses way more fuel than an NA putting out 200 hp... and also, its not as effecient. You'll notice that you'll need your turbo putting out about 3-4 psi of boost before you match the same power as an NA with a free exhaust and intake. That's because the turbo represents a huge intake/exhaust restriction.
For all you people that think they can slap on a turbo and put out 5 psi... good luck. First off, have fun keeping boost down that low. The higher comp NA engines really spool the turbo up. You'd need some serious restriction, then the car would just plain suck. Also, at approx 10 hp per PSI, at 5 psi, youd only be making about 10-15 more hp than your stock engine with a free flowing ehxuats system (read above about restriction!)
This sucks considering I've seen up to 13 lbs.
My engine is being rebuilt right now, and I'm puttting in an FD or walbro pump, and bigger secondaries for sure.
I wouldn't even consider doing it with a stock NA system. A turbo putting out 200 hp uses way more fuel than an NA putting out 200 hp... and also, its not as effecient. You'll notice that you'll need your turbo putting out about 3-4 psi of boost before you match the same power as an NA with a free exhaust and intake. That's because the turbo represents a huge intake/exhaust restriction.
For all you people that think they can slap on a turbo and put out 5 psi... good luck. First off, have fun keeping boost down that low. The higher comp NA engines really spool the turbo up. You'd need some serious restriction, then the car would just plain suck. Also, at approx 10 hp per PSI, at 5 psi, youd only be making about 10-15 more hp than your stock engine with a free flowing ehxuats system (read above about restriction!)
Last edited by Bambam7; 02-24-03 at 01:45 PM.
02-24-03, 02:58 PM
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Re: turbo charging NA's
Originally posted by Dougrxheaven
I was wondering if anyone out there would know how much boost I could run with a factory fuel system before I start leaning out. As well, aproximatly how much hp would I be pushing getting close to this limit.
I was wondering if anyone out there would know how much boost I could run with a factory fuel system before I start leaning out. As well, aproximatly how much hp would I be pushing getting close to this limit.
"If you have to ask..."
http://www.aaroncake.net/rx-7/naturbo.htm
02-25-03, 04:09 AM
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Just so you all know I have driven my car on 4psi and the stock fuel system can cope fine. However I have a very efficient intercooler and a few dodgy gheto-tech mods to increase fuel with throttle position and you CAN keep the boost this low quite easy, you just restrict the intake.
And it is ALOT faster at the same RPM with 4psi vs my car N/A with a exhaust/intake... alot faster.
However I don't recomend doing this. I'm now not boosting my car at all until I get my E6K and new fuel pump.
but I havn't done any damage yet doing the above, still has the same compression it had before and not even a hint of detonation.
And it is ALOT faster at the same RPM with 4psi vs my car N/A with a exhaust/intake... alot faster.
However I don't recomend doing this. I'm now not boosting my car at all until I get my E6K and new fuel pump.
but I havn't done any damage yet doing the above, still has the same compression it had before and not even a hint of detonation.
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