How much power can stock injectors handle

[jokergerm]

so i am trying to get a high performace crate motor. looking at about 370hp + my whipple charger est. 550hp

I dont think the stock injectors can take that much power.

Where can i get bigger injectors?

or a marine manifold

does the marine manifold go right in with no problem?? or do i need to mod something

thanks

[dalejrfan8]

Im pretty sure the stock vortec injectors can handle about 400 crank HP. You cant get bigger injectors unless you get a marine intake or something similar.

[98GreenMachine]

There are no larger injectors for the stock CSFI setup available. In order to user larger injectors, the marine intake or other vortec compatible intake is required. The marine intake is not a direct bolt-in, some modification and fabrication is required.

Here is info on the marine:
http://www.pacificp.com/forum/viewtopic.php?t=317
http://www.fullsizechevy.com/forums/...ne-intake.html

I get the feeling you are looking for a easy plug-and-play setup to achieve your 500+ HP Vortec engine. The only problem is, there isnt one. You are going to have to do your homework and find out which intake manifold you want to go with to fuel your project. That combined with a supercharger will require some dedicated tuning. A mail-order tune ain't going to work here, you will need a dedicated dyno tune to achieve the full potential of your engine.

[jokergerm]

ok so the stock ones can handle about 400 hp.

and my whipple kit has 2 extra injectors, so would that set up work. The crate motor i am looking at works with the stock tune, the company said. so that sounds like it might work

[jokergerm]

any one think my idea will work???

also i talked to whipple and there kit comes with 2 40lb/ hr injectors

and they said i can swap them out to 2 80lb/hr injectors

I think that should be enough fuel

please let me know

[jokergerm]

someone must hav an idea

[Pauly]

400 natuarlly aspirated hp and 400 firce inducted hp use very different amounts of fuel. The 199 pph popets may flow enough for 420-430 NA hp but may not be able to feed 370 hp with a blower. When using boost you use more fuel than when making the power NA.

Of course it will work, thats what Whipple designed their blower kit for. Whipple owuldnt make a kit that didnt work. Having 8 actual injectors firing at teh back of the intake valve is much better than having 2 extra fuel injectors firing into the intake manifold. Cylinder to cylinder distribution of mixture is poor when compared to 8 individual port fuel injectors.

I'm sure a PCM tuner would be able to work some magic as well over the stock PCM tune for sure. STock is leaving lots on the table.

Tuning with a wideband would help zero in on safe power production.

You are travelling down a road that many have travelled, you will reach the limitations of the stock Vortec injection. You need 8 larger port fuel injectors for ultimate L31 power.

Talk to Boosted Z71, is a Marien Intake user that has went through the extra 9 and 10th injector scenario.

Obviously you have to play to pay.



peace
Pauly