Maxed out injectors, upgrade fuel pump too?
05-06-2005, 02:27 PM
#1
Maxed out injectors, upgrade fuel pump too? Well a while back I had my car redynoed with the new cam and was having issues with air fuel ratio. It was obvious that it was the injectors. Installed the SVO 30 lb. injectors, problem solved. Well from what I've read and been told, the injectors and fuel pump support about the same power. So since I upgraded my fuel injectors and seems to be doing fine, should I upgrade my fuel pump as well? I just did installed the 90mm FAST intake, Nick Williams throttle body, and waiting on an 85mm SLP MAF and TS&P 85mm lid, so I should be picking up some more power. I'm sure its close to being maxed out as well. What can happen if my pump cant handle the power and it gets maxed out? Anyhow, what do you think? Also, any recommendations on pump/system? Thanks.
05-09-2005, 08:26 AM
#3
Coal Mining Director
iTrader: (17)
Join Date: Nov 2001
Location: Virginia
Posts: 4,442
Likes: 0
Received 0 Likes
on
0 Posts
With a head/cam bolton car your fine with the stock pump as long as it's healthy. I'd do an A/F check on a dyno for insurance, but you're fine. If you step the power up over 425ish rwhp, then look at the Racetronic plug and play system from Thunder,etc.
05-09-2005, 12:29 PM
#4
Well I only have a cam only setup, but my car puts down 400 rwhp through a 12 bolt w/4.10 gear, through an automatic, with a loose unlocked converter, on slicks. I am certain that it would be 450+ rwhp range if it was still a 6 speed because with the C2 cam and lots of mods ago, I put down 417 rwhp. Automatics, loose converters, 12 bolts, numerically high rear end ratios, and slicks take up lots of power. My car has always put down more than usual. I picked up 35 rwhp over the C2 cam with the T-ReX. Anyhow, as far as the stock pump being healthy, Im not sure. I have a '00 model with 68k miles on it. I know power to the wheels is competely different between a 6 speed and an automatic, so how much does the Racetronix fuel system from Thunder support? I have roughly 518 motor hp.
05-09-2005, 09:44 PM
#5
i thnk the racetronix kit is 250 with everything you need for install. im looking to make anywhere from 430 rwhp up to about 470 when im "done" modding. i decided to upgrade, wouldnt hurt anything doing it only help. at least u know it will pump enough fuel for you. i would say do it
05-12-2005, 11:43 AM
#6
Just for my reference, how much power does the Racetronix system support? Also, as stated before, I've heard/read that the fuel injectors and fuel pump support about the same amount of power and I've maxed out my injectors, so how come my pump hasnt gone yet? What can happen when it does max out? Any harmful effects? Thanks.
05-12-2005, 12:28 PM
#7
if you pump does "max" out, i assume that the pressure drop gets pretty significant in the fuel rail. so instead of 58 psi at wot, it may be something like 52, u could tell because it would start to run lean and prob have some KR. racetronix kit as far as power i dont know, its 255 lph i believe. dragaholic, what kinda power u making?? and what size injector your running? i would *think* that the racetronix kit could support well over 500 hp on a N/A car, maybe?
Trending Topics
05-12-2005, 12:50 PM
#8
I have no way to measure the fuel pressure because I dont have a fuel pressure guage. I have a tranny temp guage that I've had forever now and have yet to install it. I might pick up a fuel pressure guage and install them both. Anyhow, right now I'm making 400 rwhp, but I have yet to have it back on the dyno with the new 90mm intake setup. This is through a fully built automatic, loose and unlocked converter, 12 bolt w/a 4.10 gear, and on slicks. Back when I was a 6 speed and was running the C2 cam, a much smaller cam than the current T-ReX, I was putting down 417 rwhp. I would imagine if I was still a 6 speed, that I'd be putting down 450+ rwhp because I had a 35 rwhp gain with the T-ReX over the C2.
05-12-2005, 01:17 PM
#9
u can get a pressure gauge from auto zone for 40 bucks and sit in the driveway and test it, if you have too much of a pressure drop when you open the throttle fast and get the vacuum down to 0 then i would upgrade, if it sits right at 58 u should be good, i figured it would help keep higher pressure at the rail at WOT and there wouldnt be a large fluctuation in pressures because the new pump coudl pump more. im looking at making 450-480 rwhp when i get through with my mods and feel like i have a good enough fuel system now to do it
05-14-2005, 01:08 PM
#10
TECH Resident
iTrader: (4)
Join Date: Jul 2004
Location: USA
Posts: 972
Likes: 0
Received 0 Likes
on
0 Posts
FWIW, my Racetronix pump was good to around 600rwhp on my SC Z06. I assume it would be about the same on a F-body. More than that requires a BAP... which might be a good idea for you. You could install a BAP and not have any worries w/ your factor pump.
