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fuel pressure dropping towards redline, what inline pump do I need??

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fuel pressure dropping towards redline, what inline pump do I need??

 
 
 
 
Old 07-31-03, 06:18 PM
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fuel pressure dropping towards redline, what inline pump do I need??

Got the car on a dyno and found the fuel pump couldn't hold the 55+psi pressure up to redline. The tuner said all his company cars he tunes uses Vortech T-Rex inline pump. Now the T-Rex pump isn't a powerful pump but it isn't a tiny honda pump either.

I would buy the T-Rex pump but I think if I do I'll just be buying the Vortech name at $200.

I want to buy 2 of these pumps to add to my upgraded intank pump.

Here is what MSD says about this pump......Made in the USA, the pump is ideal for use as a “booster” for nitrous oxide applications, or as a stand alone pump for multiport EFI systems on engines up to approximately 500 HP. Capable of 43 gph at 40 psi/162l/h.

My question is if this pump will even help out flow at 55+psi when it is only rated at 40psi
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Old 07-31-03, 11:22 PM
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Those MSD pumps SUCK! I got a genuwine Cosmo pump that flows about 183 liters/hour @ 40 psi!!
$250 shipped!
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Old 08-01-03, 01:21 AM
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The cosmo pump is good up to about 20 psi. I don;t know if it will support more boost than that.
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Old 08-01-03, 03:04 PM
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I'm talking about static fuel pressure - 183 liters/hour @ 40 psi.
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Old 08-02-03, 07:50 AM
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Well, the one in the car right now is the cosmo pump but it still isn't enough and I want to be safe than sorry. The MSD pump won't help at all? I'm not trying to just use the MSD pump alone. I'm using it as an add on
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Old 08-04-03, 09:29 AM
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Originally posted by LT1-7
Well, the one in the car right now is the cosmo pump but it still isn't enough and I want to be safe than sorry. The MSD pump won't help at all? I'm not trying to just use the MSD pump alone. I'm using it as an add on

just get the rx7.com pump. it worked fine with my t78. if you need to pair it with your stock pump. there are some writeups on how to do that.
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Old 08-04-03, 09:59 PM
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Does'nt Ralph sell a realy large intank pump? Something out of a Porshe? CJ
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Old 08-04-03, 10:17 PM
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john,
get the walbro- flows 255lph and is only $95. there's two types, get the one for higher fuel pressures. nothing beats it for bang for the buck.
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Old 08-04-03, 10:58 PM
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The Cosmo pump will flow fine if you upgrade the wiring to it. There's info about it on Wade's site -- be sure to read the added comments re: the wiring.

http://www.newwave.net/~flanham/wlan...l/fuelfaq.html

scroll about 1/2 way down
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Old 08-06-03, 08:16 PM
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www.TPiS.com

There a Vette tuner up here in Minne and sell these Bosch intank and inline fuel pumps for around 179.00 each.....They support 575hp and they also offer a new Bosch pump that supports 800hp... I have one and I run 18-20psi with a T60-1 1.00 a/r and the fuel pressure is fanastic...

BTW: 55psi fuel pressure is kinda high

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Old 08-06-03, 10:41 PM
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Originally posted by [email protected]

BTW: 55psi fuel pressure is kinda high
Not under boost.....
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Old 08-07-03, 08:13 AM
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You could always run 2 intake pumps. I run 2 stock FD pumps...Had the walboro and the supra TT pump...both fell off top end.
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Old 08-07-03, 12:03 PM
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55psi under boost? thats your opinion
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Old 08-08-03, 06:10 AM
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Originally posted by pp13bnos
Does'nt Ralph sell a realy large intank pump? Something out of a Porshe? CJ
Yes he does and that is the one the we have. Ralph says the pump will support up to 18psi safely. We want something like 22psi.
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Old 08-08-03, 07:33 AM
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ahhh. I gotchya. CJ
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Old 08-08-03, 07:53 AM
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Originally posted by [email protected]
55psi under boost? thats your opinion
I think rynberg means boosting...i.e. static is 40 psi fuel pressure, and at WOT boosting 15 psi the FPR is at 55 psi. Which BTW, mine is set exactly like that.
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Old 08-08-03, 11:52 AM
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Look into the Bosch lineup. I've got two of the Bosch 044 pumps in my car...they are the same pumps used in Indy cars... (btw: *one* pump was overkill, but I wanted to be complete-fuelpump-failure "failsafe".)

Sorry, I don't have the flow specs handy.

K
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Old 08-08-03, 12:12 PM
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Kyle, nice to here from you, How's the car? I liked your hood so much, I am having one made for my FC, as well as a GTC bumper . I have a Bosch pump as well, not sure which one, but I'll check. Mine is VERY loud(in tank). You can here it from 10 feet away.
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Old 08-09-03, 07:15 AM
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Both of mine do howl occasionally when they get hot, especially the mid-pump...which today is coming out...Don't need it...

I'm telling you, those pumps are awesome....They don't look fancy but one gives a ****, they work and mine have been in since 96...

Brad
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Old 08-09-03, 10:36 PM
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Nocab.......where did you purchase your Bosch 044 pump?
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