How much HP with stock fuel pump?
Thread Starter
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
How much HP with stock fuel pump?
How much power can the stock fuel pump in my '87 support? I've got a 383 MR engine with just about 500 hp / 500 torque at the crank. Should i replace the fuel pump? What about the feed and return lines?
As always - thanks for the help!!
As always - thanks for the help!!
Instructor
Joined: Jun 2001
Posts: 132
Likes: 0
From: Monroe Washington..the State
not sure on the pump it self but in a blown application with say a .55-.60 BSFC we maxed the lines around 526RWHP with a 383 and 14Psi.
Bigger injectors and pumps have yet to push it over. Next go the lines.
Our Tell tail sign's were that even with the bigger fuel pumps we still started loosing pressure at the injector rail around 5,400 RPMs.
In a N/A use with a more favoriable .40-.45 BSFC (about where our LT engines are) you should be able to hit 600RWHP I would think
Good luck!
Bigger injectors and pumps have yet to push it over. Next go the lines.
Our Tell tail sign's were that even with the bigger fuel pumps we still started loosing pressure at the injector rail around 5,400 RPMs.
In a N/A use with a more favoriable .40-.45 BSFC (about where our LT engines are) you should be able to hit 600RWHP I would think
Good luck!
Last edited by TwoFast4Lv; Jan 1, 2005 at 11:45 PM.
Le Mans Master
Joined: Feb 2002
Posts: 5,970
Likes: 20
From: San Marcos Texas
You need to change your pump. Get a walboro 255lph high pressure pump that goes in the fuel tank. It a very easy install. I have it in my car and it feeds my 500hp car with no problems...The stock fuel lines are fine. 24lb or 26lb injectors are also needed..
Burning Brakes
Joined: Apr 2002
Posts: 1,126
Likes: 0
From: Cleveland OH
I would think of the upgraded pump as cheap insurance frankly. From what I've seen, the GM stock pumps (on many GMs not just Vettes) are prone to failure. While I'm not advocating that folks running stock setups go out and buy the Racetronix kit, I would say that it's an easy choice on a heavily modded setup like the one you have. I would recommend the Racetronix kit available from Racetronix and many resellers. It uses the Walbro pump mentioned in this thread along with a nice shielded wiring setup that'll ensure you're getting steady voltage to the pump.
Good luck,
Ron
Good luck,
Ron
Thread Starter
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
ok - so after 30 minutes of online searching...
Where did you guys get your Walbro pumps from? I came up with a lot of places that sell them, but couldn't find anything specifically for an '87 vette. thanks!
Where did you guys get your Walbro pumps from? I came up with a lot of places that sell them, but couldn't find anything specifically for an '87 vette. thanks!
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Instructor
Joined: Jun 2001
Posts: 132
Likes: 0
From: Monroe Washington..the State
Originally Posted by byebyeL98
ok - so after 30 minutes of online searching...
Where did you guys get your Walbro pumps from? I came up with a lot of places that sell them, but couldn't find anything specifically for an '87 vette. thanks!
Where did you guys get your Walbro pumps from? I came up with a lot of places that sell them, but couldn't find anything specifically for an '87 vette. thanks!
I personally recomend the whole kit, on a Vette more then any others
Instructor
Joined: Jun 2001
Posts: 132
Likes: 0
From: Monroe Washington..the State
I went with the 340 because I run a NOS Dry kit some times
When you call them they are very helpfull...most of the time
MAKE SURE they send you directions...you HAVE to ask for them or they do not send them!
When you call them they are very helpfull...most of the time
MAKE SURE they send you directions...you HAVE to ask for them or they do not send them!
