Racetronix Fuel Pump Kit LS1: Do i need a retunne?
11-25-2006, 06:43 PM
#1
TECH Enthusiast
Thread Starter
iTrader: (51)
Join Date: Apr 2006
Location: socal
Posts: 641
Likes: 0
Received 0 Likes
on
0 Posts
Racetronix Fuel Pump Kit LS1: Do i need a retunne? I want to upgrade my in tank pump to this: Racetronix Fuel Pump Kit LS1
http://www.harrisspeedworks.com/shop...cat=330&page=1
My question, im going to get my car tunned in a few weeks and when i install this pump do i have to get my car retunned? Thanks
http://www.harrisspeedworks.com/shop...cat=330&page=1
My question, im going to get my car tunned in a few weeks and when i install this pump do i have to get my car retunned? Thanks
11-25-2006, 07:49 PM
#3
Originally Posted by ozws6
If you're just installing the fuel pump kit and not changing fuel injectors or fuel pressure, then the car will run just like it does on the stock pump.
11-26-2006, 01:21 AM
#5
9 Second Club
iTrader: (25)
Join Date: Sep 2002
Location: Missouri
Posts: 237
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by MeentSS02
Pretty sure his fuel pressure would be different...most report a higher pressure at the rails after an install, which would skew the tune.
11-26-2006, 03:27 AM
#6
TECH Enthusiast
Thread Starter
iTrader: (51)
Join Date: Apr 2006
Location: socal
Posts: 641
Likes: 0
Received 0 Likes
on
0 Posts
Thats what i wanted to hear. When i put this in i dont need to upgrade my injectors right? I heard that the stock injectors are big enough to support my mods. thanks
11-26-2006, 07:06 AM
#7
TECH Regular
Join Date: Jan 2005
Location: Orlaanndoooo
Posts: 475
Likes: 0
Received 0 Likes
on
0 Posts
I wouldn't think it would matter unless you are on the ragged edge of what the stock pump can supply but that is just me thinking. Has anyone verified via wideband the before and after results on this?
Trending Topics
11-26-2006, 02:13 PM
#8
TECH Junkie
iTrader: (28)
Join Date: Jan 2004
Location: Houston
Posts: 3,250
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by MeentSS02
Pretty sure his fuel pressure would be different...most report a higher pressure at the rails after an install, which would skew the tune.
At this point, you should get a tune to make sure you're getting the most out of your hardware. You're best bet would be to pick up your own tuning software so you can tweak all the other drivability things a dyno tune will miss.
11-26-2006, 02:52 PM
#9
Originally Posted by ozws6
I was running a Racetronix pump and wiring harness and needed no changes to my tune after the install (I tuned my car with HPTuners). The stock fuel pressure regulator will keep the fuel pressure the same.
11-26-2006, 03:05 PM
#10
7 Second Club
iTrader: (18)
Join Date: Mar 2004
Location: Cincinnati, Ohio
Posts: 790
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Long Beach
Thats what i wanted to hear. When i put this in i dont need to upgrade my injectors right? I heard that the stock injectors are big enough to support my mods. thanks
11-26-2006, 05:14 PM
#11
11 Second Club
iTrader: (27)
Join Date: May 2002
Location: East Palestine, OH - USA
Posts: 2,397
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BlwnTA
You should be fine with your mods, stock 2002 injectors I believe are 28 lb/hr. They are good up to around 400-450 whp range.
11-26-2006, 05:19 PM
#12
TECH Enthusiast
Thread Starter
iTrader: (51)
Join Date: Apr 2006
Location: socal
Posts: 641
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for all the imput guys. I think im going to wait for the tune until i get the fuel pump and injectors done. They will charge 500 for one time but he said that he can work out a deal if i need minor adjustments. thanks
11-26-2006, 08:30 PM
#13
9 Second Club
iTrader: (25)
Join Date: Sep 2002
Location: Missouri
Posts: 237
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by MeentSS02
Do you actually monitor fuel pressure real time (or logging)?
11-27-2006, 05:43 PM
#14
Originally Posted by ozws6
I had a manual fuel pressure gauge on the rail and compared the before and after pressures. The pressure ranged between 58-60 psi with the stock and racetronic pump. A 2 psi change in fuel pressure only equates to a 1.7% change in fuel flow on the stock 28.8 lb/hr injectors.
11-28-2006, 03:44 PM
#15
TECH Enthusiast
Thread Starter
iTrader: (51)
Join Date: Apr 2006
Location: socal
Posts: 641
Likes: 0
Received 0 Likes
on
0 Posts
Im just debating on if i should get the tune then put this fuel pump w/ injectors in and get retune. Or just wait until after fuel mods then do the tune. I dont want to waste money.
11-28-2006, 09:15 PM
#17
TECH Enthusiast
Thread Starter
iTrader: (51)
Join Date: Apr 2006
Location: socal
Posts: 641
Likes: 0
Received 0 Likes
on
0 Posts
Thats what i think im going to do. How many of you guys have installed one of these fuel pumps using the trap door method? I was thinking of finding the write up and atempting to do this myself but im not really to familiar with the fuel system though.
11-28-2006, 10:22 PM
#18
If you upgrade your injectors to say SVO 30lb'ers or Delphi/Lucas/Racetronix 42+lb'ers, you have to get those tuned for. Injectors aren't optional. Didn't know if you knew this already.
I plan on installing the 42s since I plan on a small dry shot in the future.
I've read how to do the install on the pump (both methods), but I've never done it myself. Maybe we could meet up and do the install on both of our cars on the same day?
I plan on installing the 42s since I plan on a small dry shot in the future.
I've read how to do the install on the pump (both methods), but I've never done it myself. Maybe we could meet up and do the install on both of our cars on the same day?
11-28-2006, 10:37 PM
#19
TECH Enthusiast
Thread Starter
iTrader: (51)
Join Date: Apr 2006
Location: socal
Posts: 641
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BigDaddyBry
If you upgrade your injectors to say SVO 30lb'ers or Delphi/Lucas/Racetronix 42+lb'ers, you have to get those tuned for. Injectors aren't optional. Didn't know if you knew this already.
I plan on installing the 42s since I plan on a small dry shot in the future.
I've read how to do the install on the pump (both methods), but I've never done it myself. Maybe we could meet up and do the install on both of our cars on the same day?
I plan on installing the 42s since I plan on a small dry shot in the future.
I've read how to do the install on the pump (both methods), but I've never done it myself. Maybe we could meet up and do the install on both of our cars on the same day?