Any HP gain with 255HP fuel pump, Mag says 23.2

[BOBS90TURBO]

Will I get any HP gains when I install my Walbro 255hp pump? Import Tuner Mag dynoed a 93 awd mod by mod and when they installed thier 255HP they gained 23.2 HP.
They did a base line dyno at 157.2 HP 143.4 TQ
After a air filter, Exhaust, ground wires,down pipe, HKS fuel cut defencer they had 267.1 HP 252.8 TQ
Then they installed the 255HP Pump last and they got 290.3 HP 278.4 TQ.

WTF how can this be,,If this is true I should get a gain right

Also do I really need to re wire the my new 255hp pump.

 

[Agent Ezzard]

When you install the pump you'll actually have to tune your car in order to get the extra horspower in conjunction with added boost. It's not a necessary that you rewire it when you install it.

 

[BOBS90TURBO]

The guys at Import Tuners did no tuning at all, stock ecu and maf and they got an increase in power.

 

[Turbo98]

133.1 HP gain with just filter, exhaust, ground wires, down pipe, fuel cut defencer, and a 255? They didn't do anything else? The rest of the car is stock and untouched?

 

[lowridin2g]

some impressive shit i may add. i also have that issue. makes me think twice about waiting to put my 255 lph pump in till i get 660's. i think it will work just fine with 550's and no fpr. anybody want a walbro 190lph?

 

[DevilSperm]

anybody want a walbro 190lph?

yes $$??

 

[WhipmastaFlex]

without a boost controller, either. i have the 'power pages' issue with the same 1g. i would imagine that thing was running (barely) a 14.1 a/f ratio and/or creeping to 20+psi to get those numbers, if in fact they are legitimate. all the dyno graphs they showed for that car look sketchy.

 

[Just Nasty]

what issue is this?

 

[WhipmastaFlex]

what issue is this?

an issue of import tooner, in which they added an apex'i N1 downpipe, HKS fuel cut defencer, and 255lph pump and gained over 100whp. since then, about 578939 sixteen year old kids have bought a first gen, signed up for the site, and asked where they can get these mods (not directed at the creator of the thread, however, this article has been brought up in many threads)

as for the question asked, unless you are running VERY lean, a fuel pump will cause you to run rich, thus harming performance rather than improving. at which point, you would need an AFC, DSMlink, e-manage, etc, to controll the amount of fuel injected into the motor. THEN you will see improved, more consistant performance.

 

[90DSMTurboFWD]

your 255 will be crao without a AFPR, I had been driving my 255 for about 5 months before i got a AFPR, set it at 40 PSI and man could I feel the difference even without the tune. Got it tuned an hour later and DAMN great stuff.

 

[BOBS90TURBO]

Thank You so much for answering my question about the 255hp pump, I do not run lean now, I would say normal, lean at idle and gets rich at WOT, I only have a A/F gauge now.

But I do have a bad ass AFPR and fuel pressure gauge that I can install with my new 255HP, would I still run rich with the AFPR??? Or should I just wait and get a afc, I really want to wait on the afc for now(if I can).

And you are not kidding about the 1g turbo cars getting scarfed up since that article came out, I try to buy all the 1g cars I can at the local auto auctions(dad has dealers license), they have gone through the roof latley. :thumbdown

 

[WhipmastaFlex]

i have a walbro 255lph HP pump and AFPR waiting to be installed. i've had them for a month now, but waited on my AFC. i installed the AFCII last nite, since i figured it will not alter the cars performance as long as i don't mess with it. i get my logger monday, then the pump and fpr go in, then the tuning begins. just may way of doing things.

 

[gsxtacy]

I mean where did all the 1000's of 1G AWD Turbo's go!!!

Better grab em while you can I am telling ya!!!

Gsxtacy

 

[4g63swap]

I will tell you were they are look, around detroit. any tree you find near the road theres a 1g wrapped around it with a sixteen year old in the drivers seat shaking there head.

 

[DSMKevan]

Stupid f%^*ing Fast and Furious....stupid import "tuner" magazine, stupid....

How new is this issue? Good god I hope its not recent....

 

[CanadianTSi]

The only way you well gain power from the fuel pump is the ability to run more boost.

 

[BOBS90TURBO]

I think it was in the Feb/04 import tuner power pages is where I saw it.

 

[98Bomex]

It was import tuner #56, November 2003. It has a blue WRX on the cover.

hp tq
base 183.6 198.6
apexi n1 dp 219.9 228.7
HKS FCD 267.1 252.8
255 LPH FP 290.3 278.4


Straight from the book.

 

[BOBS90TURBO]

If the only way to gain HP from the install of a 255hp is from uping the boost then the mag is fibbin, I mean they show 267hp then install the pump and it shoots to 290hp 23hp gain.
They do not say anything about raising the boost at all. What Gives

 

[Zenja]

I would think it's implied. I can see someone doing that.

 

[ZenkaiRacerDsM]

If you knew anything about tuning at all then you would know that just by simply throwing a fuel pump in you will not magically get power. They were probably running lean as #### and the ecu was retarding timing as much as it could.... then when they installed the pump there was more fuel so the ecu didnt have to pull as much timing and ran more. Thus more power.

 

[BOBS90TURBO]

Now thats an answer, That makes perfect sense, And if I knew anything about tuning I would not be asking the question, hell I just bought my first datalogger today.

But seriously, thank you for answering this I was really trying to figure this out.

 

[BatmanGSX]

Installing a bigger fuel pump will not give you more fuel or more power unless there was a starvation problem to begin with. Those who say different are lying and probably do not understand the concept of a fuel pressure regulator. As volume increases it will just open more to keep pressure the same, thus installing a larger fuel pump will also not make you run rich as some people claim. This does not account for regulators that are being overrun because they simply cannot open enough to regulate the pressure. This is rare on a 1G but likely on a 2G with the largest pumps.

 

[Keaka26]

as for the question asked, unless you are running VERY lean, a fuel pump will cause you to run rich, thus harming performance rather than improving. at which point, you would need an AFC, DSMlink, e-manage, etc, to controll the amount of fuel injected into the motor. THEN you will see improved, more consistant performance.

BatmanGSX (above) is talking about this post. Thank god someone chimed in, because misinformation is a b**ch. A fuel pressure regulator (stock in this case) will bypass the unused fuel back to the tank. The only time when a pump will cause you to run rich, is when it flows too much for the FPR to bypass (255HP, supra pump etc) . This usually happens at off-boost situations because of low fuel demand.

 

[DSMKevan]

Its all part of the ruin the dsm'ers community evil doers plan