What turbo/manifold should I buy? 450 whp - Page 3

layzie12g · 06-01-2008, 02:25 PM

Damn man im stuck. I dont know where to go from here. No leaks any where. I dont want to do a gm maf either. Any other suggestions or ideas on why the airflow would continue to go up as the rpm goes down???? Car is rich as hell under load in 5th gear on the freeway also. Like 10.0ish. Not sure why.

chavez408 · 06-01-2008, 03:19 PM

Are you having issues with your 2maf and your 4" intake? Does it not bolt on?

layzie12g · 06-01-2008, 03:20 PM

No it bolts up fine. By the way i DO NOT have an afpr on my car. Could this be causing any of my problems?

NewTurboTuner · 06-01-2008, 04:24 PM

Quote:

Originally Posted by layzie12g

Damn man im stuck. I dont know where to go from here. No leaks any where. I dont want to do a gm maf either. Any other suggestions or ideas on why the airflow would continue to go up as the rpm goes down???? Car is rich as hell under load in 5th gear on the freeway also. Like 10.0ish. Not sure why.

Quote:

Originally Posted by layzie12g

No it bolts up fine. By the way i DO NOT have an afpr on my car. Could this be causing any of my problems?

Oh yeah you NEED a after market afpr. The stock afpr can't handle a 255.
No matter how you tune..... it won't matter, because the 255 will over power the stock afpr, and you'll go rich.

I think we just found your next upgrade

Slippi84 · 06-01-2008, 04:24 PM

Quote:

Originally Posted by layzie12g

No it bolts up fine. By the way i DO NOT have an afpr on my car. Could this be causing any of my problems?

*Smacks head*

Can you say overrunning the stock fpr.

talon187 · 06-01-2008, 04:32 PM

id kill for a 35r my friend ran 10.3 @133 on 26psi and the vac line blew off in 4th so the bov went right open and the car broke up

layzie12g · 06-01-2008, 05:09 PM

Yea but the car ran fine with the evo 3 and 650s. When i first got the car together i thought that was the problem so i switched back to the 650s and had all of the exact same problems as with the 950s. The car did idle better but still no difference problem wise. Car still wanted to die just ilke it did with the 950s. Global and dead times were changed accordingly. I dont want to spend the 200 bucks and be in the exact same boat and id bet my left nut that is exactly what is going to happen. There is one on craigslist so maybe i should pick it up.

dsm-onster · 06-01-2008, 05:34 PM

Running fine before or not, with a walbro 255 you're overrunning your stock fpr. My stock FPR could not hold the pressure below 55psi !!! Even with the fuel pump not rewired. It will explain idle and part throttle richness, though being able to run 10:1 under higher loads.

Do you have a log of the airflow increasing as rpms fall off?

RipperXX · 06-01-2008, 06:28 PM

Uh get an AFPR... After which you will more than likely have to re-tune since you will then actually be running not only a controlled amount of fuel pressure but the correct. Should help with the idle and what not as well.

chavez408 · 06-01-2008, 07:41 PM

X200 on the afpr.

Slippi84 · 06-02-2008, 06:54 AM

Quote:

Originally Posted by layzie12g

Damn man im stuck. I dont know where to go from here. No leaks any where. I dont want to do a gm maf either. Any other suggestions or ideas on why the airflow would continue to go up as the rpm goes down???? Car is rich as hell under load in 5th gear on the freeway also. Like 10.0ish. Not sure why.

That's when your pump is going full steam and tech it's not your fpr it's the return on it. Your return is not big enough to route enough fuel back to the tank so it creates unstable fuel pressure and you get unwanted inector drip and like everyone says it's hard to tune something that isn't consistant. As long as you have the couplers on tight your 4" intake will not cause any of the problems your seeing 2g maf or not. How your running 27psi on a 6psi spring is beyond me but I would def look into that too. Tuning a car that gets to a certain psi by creeping is bad too because whatever is causing that creep is DEF not good and coudl get worse and then you creep to 30 psi or more and bye bye stock engine

NewTurboTuner · 06-02-2008, 01:14 PM

Don't spend any more $$$ on dynos or tunes until you get a afpr. It's a waste of $$$.
You're trying to use a mis-match tune, as a band-aid for an incomplete set-up ...It's not going to work. After you get a afpr installed, You'll have to re-tune everything.

These are the best "kit" deals that I've found. (I have the same super rich problem with my stock EVO1 afpr. and 255 pump)

EXTREME PSI : Your #1 Source for In Stock Performance Parts - DSM Specials

Blank

Theres also a few in the classifieds, but you'll need a install kit to make it easy. Both places above sell a install kit separately.

prostreetdsmx1 · 06-02-2008, 01:57 PM

The answer to your question is.....

layzie12g · 06-02-2008, 02:01 PM

I just reread this and want to put this at the beginning of the post. The car runs very lean (17.7-lean) at an idle which doesnt make sense to me. I dont have any of the logs because i use my friends computer. I will try to get some up. I already fixed the wastegate with another spring. I doubled them up. No more boost creep. I have the boost down to 25 psi and it feels slower then it did with the evo 3. (Rich and could probably take a little more timing) I dont pay for tuning or labor or anything so its not like Im wasting anything but my time. Here is the thing though. Ive read everything about the 255 and the stock regulator and I know its no good but im broke right now and trying to live with what i got. The car never did any of this before with the 255, evo 3, and 650s. Not one problem. Even when i switch the 650s back it the car still has all of the same problems. Im going to look in to what I can find as far as a regulator goes and will post back when i get one on. If i know my car an afpr will fix the bad idle and WILL NOT fix the airflow (main problem) that Im having. Hopefully Im wrong......Thank for the help

NewTurboTuner · 06-02-2008, 02:56 PM

Hey Layzie
AFR's are probably all over the place because your trying to create a crazy tune to fix a separate problem. It's hard to make good sense outta something thats not working right in the 1st place.

Right now your trying to learn tuning, with a system that's not complete. Thats a hard way to learn. Things will make alot more sense when it's all complete.

I totally understand about not having fund$ for the next mod..... Thats the life of a DSM'er

The best thing you can do for now (without any $$$) is to turn you boost down. I think you'll get a more consistent tune that way. The higher boost you go, the more fuel the ECU is going to add, (making it super rich) so just keep boost down for now. (thats what I gotta do for my EVO until I get a afpr)

Your stock afpr probably just had enough... it might have been working before, but now it's a no go. The only alternative that I know (while using a stock afpr) is to get a smaller fuel pump. I hear the Walbro 190 won't over power the stock afpr like the 255 does.

Slippi84 · 06-02-2008, 03:02 PM

Yeah but you havce a turbo tha is producing a lot more air flow with all that boost. So your ecu is trying to send a lot more fuel than it was with yoru little 16g. SO your pump is working harder than it did before thus why you have a problem now and didn't before. Put your 16g back on and I bet it goes back to the way it was. Like they sai dlower boost save up for the afpr and then try again

NewTurboTuner · 06-02-2008, 03:25 PM

Quote:

Originally Posted by prostreetdsmx1

The answer to your question is.....

"The answer to your question is....."

.........Cheap knock off imitations???

Looks frightening

chavez408 · 06-02-2008, 04:12 PM

Hey layzie, don't be lazy on modding your car. Haha I just had to do it. You don't know any other dsm'r around your area to see if they would let you borrow their afpr?

1992awdlaser · 06-02-2008, 04:28 PM

Some people modify the stock regulator to lower the pressure with a 255. Some people with 1g's (should work with 2g) use a n/t 1g fpr to lower the pressure. If it is a fuel pressure problem it could also be the siphon tube in the tank (1g's don't have to worry about this).

I heard about modding the stock fpr from coltboostin. He refers to it as porting.