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i jus cant get one opinion on this : can i run a 4 psi turbo without fuel mods. i did read an article i got from somewhere here with HKS sayin 3-4 psi is aight fr our civics. is this truuuuu or not.

and will jus a aftermarket fuel pump do if modification is needed. oh heres da beggenin part of the article:



"You need a couple of things. I myself haven't figured out how to take care of the fuel system yet, so I'll only list those parts that are needed to run about 3-4psi. HKS said they could run 3-4 psi on the stock fuel system without going lean, so that's what I'll shoot for as well.

First off, if you don't have an EX you're going to want to redo your exhaust system. Buy someone's EX header and do the conversion to the EX exhaust system. Either make your own exhaust system (like I'm planning to do), or just buy the EX cat and downpipe and header and an aftermarket exhaust system. Then extend the sensor wires. No biggie..."

 
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I've heard the same thing too!!!

Dude, you're from Pakistan? Somebody with more knowledge help this guy out!!!
I think you're the only memeber I've seen from there. Welcome!

 
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i heard from some dude that you can run 6 psi with NO internal mods but i thing he has no clue about what he is talking about. you'd be runing lean as hell without any fuel mods. plus whats that sh*t about having to convert the returnless fuel systemm into a return plus the "missing link" mod?

 
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As for modification you are going to need an aftermarket fuel pump, and also change over the return-less fuel system to a return fuel system. You could raid a junkyard in hopes of finding a civic with one and tear out most of what you would need for it. But the biggest problem that you are going to run into is internals, getting the engine to handle more than 3-4 psi on stock internals over a period of time is going to be hard on the engine.

I'm sure there are more people on this site way more knowledgeable when it comes to turbo'ng our cars hopefully one of them will shed some more light here

 
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This again.... you do NOT need to convert to a return fuel system! I've been running 8-10psi for a while now with the returnless (modified, but still returnless) system.

You may be able to go 3-4psi with no fuel modifications, but your engine will not last longer than a year. I can guarantee that. It'll be running right at the edge of safe on the air/fuel ratio, and it will be outside of the safe range when it's cold outside (cold=more dense air= needs more fuel). So, you can do it, but I would never recommend it. It's not that much more expensive to do the fuel system, and it's a hell of a lot cheaper than buying a new block.

The blocks themselves can handle 10psi no problems as long as it's tuned and maintained properly, this has been tested extensively by a few shop owners. Just gotta make sure there's adequate fuel.

People... I just have to add this. If you have no experience with a turbo, please do not post a reply to a turbo question. Me and a few others have had to correct way too many members on this subject, so please, for the sake of everyone, do not reply unless you have firsthand knowledge of turbocharging a car, specifically our cars.

 
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jus plz tell me one more thing, cant i do any fuel mod that dosnt include gettin a EMS. and i read that an APEXi S-AFC controller can change the fuel curve or whatever 50 points +-.



ooo and by the way my engine is a D16 vtec3. jus incase it wud make any difference.

 
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oh and i jus wanted to ask if anybodys heard of a power boost valve. its suppose to pump more fuel into the cylinders. ive seen it on a previous gen civic.

 
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and what year civic do u have??

 
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ok i just looked u up in the members ride..... what is the engine code on your block?

 
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its D16W9

 
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sounds like a varient of the 96-00 civic block.... there may be one or two people here that really know about the D16 .... the usdm civics have D17's which are different from the D16's... ill try to look some stuff up for u but i doubt i will find anything

 
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thanx , apreciate da help

 
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Yeah, it sounds like the overseas variant of the USDM's 6th generation Civic engine. My experience with those blocks in the US is that you can use a rising rate fuel pressure regulator or a Vortech FMU for up to 6psi, it's not the best, but it's pretty cheap and reliable as long as you stick to 6psi and below. You can get one of those for around $75. But this is only if you have a return fuel system already... The USDM D16 blocks are all return fuel systems, you'll have to check and see if yours is. If it's not, then you can use larger injectors and a S-AFC for the cheap decent route, but you'll have to have it retuned everytime the weather goes from cold to hot and back.

 
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research under the 1989 integra that had a d16a (i used to have one) just my 2 cents[IMG]i/expressions/face-icon-small-wink.gif[/IMG]