Thanks! Glad to be back Dale!

Pillsbry10: Mine runs fine on the stock 2.8 pump. Have not noticed any real issues. But I have not put a fuel gauge on it and took it down the track either though.

Oh....I was wrong...Lt1guy had done a few bolt on mods to the 95 and changed the rearend gears, but that is all, no internal engine changes. He said he ran it down the track with the fuel gauge on it and saw it drop. Said it had always felt like the car pulled great out of the box and then dropped off like the TQ was gone. It was the lack of fuel pressure at higher RPMs.

See mine will pull hard till I'm going, then it feels like its lost its torque. Like I'm cruzin on the hwy @ 55/60 and punch it and the responce is not there like I think it should be for 207 TQ. So fuel pressure might be dropping, thats my guess. Seems that is what modding the 2.8/3.1/3.4 is...guess work! Asked around and since we have a return sys and I have the Adj fuel pressure reg, it can't hurt to go a bit bigger!

 

Am91, I've got two words for you!


TEE FIVE !!!!!!!!!!

For when the auto goes out

 

over at caspers electronics, they sell some device that hooks up to your tps, and alt.

When your tps is at xx% throttle, it makes the alt put out more volts. Claims to help with spark, and fuel pumps not keeping up :shrug:

As tight at my funds are, and I dont really "race" mine, I havent got it.

 

V-Plus Volt Booster

https://www.casperselectronics.com/M...ry_Code=firev6

The V-Plus Volt Booster is designed to incresase your entire electrical system voltage approximately 2.2 volts above and beyond factory voltage. This unit is activated when you reach 70% throttle. This is when your whole vehicle's electrical system is under the most amount of load. The result of the increased voltage is hotter spark, incresed fuel pump flow, etc.

$80


----------

TPS-TEC G38S

https://www.casperselectronics.com/M...ry_Code=firev6


NOTE: Must have FLAT connector on TPS. TPS voltage at Wide-Open Throttle (WOT) is a function of power enrichment (PE). If the voltage is below a certain point at WOT, the ECM will reduce the level of power enrichment and the engine will not perform to its potential. This device is completely transparent until 70% TPS, then it takes over and assures maximum TPS voltage for 100% Power Enrichment (PE) when you need it the most. The TPS TEC also corrects for low sensor voltage and "dead spots". Plug-and-Play, installs in minutes. LED indicators verify correct operation.
$90
-------------
https://www.casperselectronics.com/

I found them both under the Firebird with the 3.8 so who knows if these will work for us.

 

I got a 5.7L with a stock 3.1L 1991 fuel pump ( for now!)
and the motor's throwing over 370hp and 410 ft lbs.

I just did 12.88 @ 113.342 in the 1/4 last month. I don't
think you will have a problem! I would eventually change
it, as I am going to next spring. I would like to have peace
of mind, so I am buying a high peformance Holley pump.
Since the pump's original , over 13 years old and rated for
a stock V6, I am changing it!

 

Found another one under the cavalier. They had 2.8s???

if ya search around they got lots of nifty fancy products for the 3.1/3.4

V-Plus Volt Booster

Quantity in Basket:none
Code: 102130
Price:$79.95


Round TPS / Late Alternator

------

Just search on the site for V-Plus Volt Booster and they have 6-7 different ones.

 

You might be surprised; I know I was. On a relatively stock 95Z (LT1, T56, 4.11 gears) I picked up 3 tenths and 5mph in the 1/8 mile, with nothing but a fuel pump change. The car only had about 30k miles on it then (bought it new), and had never been run low on gas, so the original pump was fine. The car felt strong, and ran comparably to other like-modifed cars...until I changed the pump to a 190lph. I think the demands of a manual trans car (or a high stall convertor), launching hard (avg 5000 rpm for this car), combined with the gear ratio (was running 4.56s for a while), overwhelmed the stock pump. Redraifs car isn't making the power that one was (or that yours is), but considering her stall and gears, plus the engine mods, I'll be surprised if it doesn't pick up something. Either way, we'll post the results.

 

GM pumps in general are weak from the factory. I had to
change the fuel pump in my aunt's 96 Olds Cutlass 3.1L with
40K in it. After the change, the car literally "woke up"! I couldn't
believe it! The car pulled better and cruised smoother on the
highway. FYI, most GM cars in the 90s to 2000s had
a TSB for updating the fuel pump!

Also, Fords are just as bad if not worse than GMs.
I had changed like 10 Ford pumps to every 3 GM pumps.

That's why I want to swap in the Holley pump next
spring. With the power and torque that we throw
at these cars, the stock pump can only do so much.
Even though I only need 35lph on my motor, I am
still going to change it. Years, mileage, etc. are main
reasons.

 

you really need to bring the car up to greg at PFE so we can tune that puppy up. im sure we can fix your flatspot no problem.

 

where exactly are you guys located?

 

Michigan somewhere, dont have the adress anymore lol... im was wondering if anyone from pf&e was posting still

anyways are you guys gonna be burning chips up there becuase i know im gonna need one bad after this engine goes in, and im not to far away....not to mention ill need a good tune

 

Maybe if we can get enough of us with modded 3.4/2.8/& 3.1s we can get a baseline program that will help everyone. give a starting point so to speak. If I was further North I would go up there. Ga is a long way from MI, esp this time of year. Been meanig to get my stock chip to funstick. I had to buy a new one, old one failed somehow. I've got a custom chip from him. It was too far off though. Maybe with my stock one he can get closer. Get us a good start.

 

yeah im sure we can get a few of us together that need a chip and could go up there at some point im in IN. i need to get ahold of a 3.1 manual chip as i still have my auto chip in there whicch is giving me a few problems anyways.

hopefully they can help us out....

 

No doubt it would be a tremendous help...but I still believe the car needs more fuel pump, too. Hopefully we'll have time to put one in during the next few weeks.

 

well hang tight and i might be able to setup a few dyno days. to go with the tunning. im and avid small engine guy. i love building small motors to make big power. but pillsbury if you need a chip swing north we can take care of it.

as for redraifs car needing more fuel pump ??? good question. most likely however the maf is maxed out. a stock GN maf with a properly setup chip would probably wake that puppy up. but again id need the car.

 

id be more than happy to come up there but it would have to be a weekend thing, i live fairly close to you guys. when i get the motor in we can arrange a time for me to come up there, what kinda cost would we be talking for a tune and chip? im looking to have the engine in over the holidays and maybe round january or febuary would be time for chip? lemme know what ya all can do for me..im probably gonna have a lot of the problems that redraif is having

 

For the Fuel pump info:
2.8 uses the same pump as the TPI 350's. Sonar and I (owner of a modded TA) changed our fuel pumps at the same time, the part numbers were the same. You won't ever have a fuel issue with going to 3.4 unless you're runing boost or lots of nitrous, even then and I doubt it.

 

If its possible to use a GN MAF, is it possible to use an LT1 MAF also (far more common, and seen often on modified GNs)? Or would a switch to speed density (say a 749) be better, esp considering the car will possibly get a turbo in the next year or so?

 

Thats the first I have heard that. Who parts were you buying? Dealer or parts store?

 

May be true with some brands of pump, but the factory specs are different.

 

yes a GN maf will work has a different flow curve and the maf tables and scalars in the ecm need tweaking same FQ range 35-150 hz however. to run a lt1 maf youll need a translator. switch to s/d and turbo. might have some basdeline type of tunes here in the next few weeks hopefully.

what ever you wanna do let me know.

 

Will do...I have to do something soon. My m/gal is horrible! Going to and from work is breaking my wallet. I go approx 20 miles a day to work one way. Half expressway...half surface streets...some stop and go... Car is using 1/8 of a tank per leg!

So say 40 miles per day 1/4 of tank used...15.9 gallon tank...so 4 gals used...

10 m/gal yipes! And we just tuned it up! Though at idle when in stop and go, I'm getting an intermitant code 22 & 44... TPS and O2 (lean condition) My car runs rich though! So swapped O2...checked TPS voltage OK? Go figure! Only me. So I have to do something quick that will provide some tuning.

Oh I have the a duplicate of my stock prom now if that will help! Recently I had to buy one when computer was replaced. Thought old prom was bad, but is not. So I can send it and yours & a heap of stockers from the junkyards I scavanged, if you think you can help!

 

you wouldnt happen to have a 90ish 3.1 manual prom would ya?

 

They pumps are Carter units (Made by Federal Mogul). I think they are 205 lph (or somthing like that) My pump makes 55 psi of pressure at the rail, I have it adjusted to be 45 psi (stock regulators kick it down to I believe 42)

 

You both got pumps that are more powerful than the stock V8 pumps...even a 155lph pump on a V6 would be a major upgrade. As far as stock type pumps, I verified at AutoZone that the stock pump is different between V6 and V8 (it'll work, but the V6 one obviously doesn't flow as much).

 

Nope most came out of the generic cars with the same type proms we have...hardly any f-bodies. Funstick was going to erase and burn over the stock chips. He needed mine to download a baseline for my car. I can't find anyone here yet that will read the stocker in my car. Though we have a lead on a guy. just have to talk to him.

 

my prom burning setup should read the stock chip fine.

 

The problem was that until recently I did not have a spare chip to let someone read. I was stuck with the chip in the car, which meant that I had to get someone local to read it. That was the issue... Funstick needed my stock program to build from, which I could not get a local guy to read for me. BUt with the spare now I can just send it where ever or leave it with a local guy to play with...