problem when boosting
#1
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problem when boosting
Ok I set my car to high boost and it accelerates great...then I hit 1 BAR and BAM! Its like I hit a wall. If I let off the gas a little so the boost goes down its fine. Any ideas? I have the stock turbo upgraded to a T04B comp. side and a larger turbine wheel in the stock housing. Now I am running a walbro, 4x720cc injectors and an s-afc tuned all the way rich to be safe for now. My car wouldn't run right without it tuned up to at least +25 in the 4k plus RPM range. Am I running extremely lean somehow? I was thinking I possibly have a boost leak that only shows its face under a certain amount of pressure. I know the only way to be sure what the problem is is to hit the dyno Guess I will try that soon. Just wanted to see if anyone had any similar problems. Thanks.
#2
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buy yourself a afr meter ...you gona save a lot on dyno time
you could be to rich :www.innovatemotorsports.com/resources/rich.php
you could be to rich :www.innovatemotorsports.com/resources/rich.php
Last edited by madmax420; 12-23-04 at 08:04 AM.
#4
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Do you guys think I am not getting good enough voltage to my pump? I never have done a rewire. Can someone postme a good link to a rewire write-up? Thanks alot.
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Originally Posted by RETed
Stock ECU?
FCD?
Overboost fuel-cut?
The S-AFC should be turned down from +25, so something is really wrong...
-Ted
FCD?
Overboost fuel-cut?
The S-AFC should be turned down from +25, so something is really wrong...
-Ted
Stock ECU
FCD installed
#6
I R SAD PANDA W/O BAW
I dont think it's a fuel pump issue because if it was you'd already be in trouble. I think something is really wrong if you have to turn up your 720s +25% above 4k. Were you thinking your fuel pump is not getting enough voltage and you had to up the percentage on the injectors to make up for it? I'm not sure if that's plausible because the pump would still have to keep up with the injectors and at a certain point one of them will be pushed too far.
#7
I'm a boost creep...
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Originally Posted by Ryde _Or_Die
My car wouldn't run right without it tuned up to at least +25 in the 4k plus RPM range.
Have you upgraded the pump? Have you checked the fuel rail pressure?
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#8
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I have realized that there is a problem. I do have a fuel pressure regulator but no clue what the pressure is at right now. I know I need to get a fuel pressure gauge to be able to properly diagnose the problem. I haven't been boosting it any more since I noticed this when I turned the boost up. I am going to get a greddy fuel pressure gauge as soon as I can after the holidays. But I also am going to rewire the pump to be sure its getting good enough voltage. I do have a walbro 255lph pump, mallory adjustable fpr, 4x 720cc injectors, fcd, and s-afc. I should be pretty good for 300rwhp+ I would think. Just need to get it setup right and tuned.
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http://www.rx7store.net/index.asp?Pa...ROD&ProdID=180
That is where I was going to get my FP gauge. I already have the EGT, oil press, and boost gauge that match.
So I will be rewiring my pump and checking my fuel pressure and I'll see what I come up with. Thanks guys.
That is where I was going to get my FP gauge. I already have the EGT, oil press, and boost gauge that match.
So I will be rewiring my pump and checking my fuel pressure and I'll see what I come up with. Thanks guys.
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