Injector Upgrade - At what power level? - 6SpeedOnline - Porsche Forum and Luxury Car Resource

Mar 7, 2015 | 06:18 PM

Mitchy

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Injector Upgrade - At what power level?

Guys,
Just a quick one,

I've been doing some reading, and at what power level should one upgrade the injectors?

I'm just about to drop the engine, so now is as good of a time as any. I'll be getting a 'protune' so the ecu side of things is no trouble.

Just no need to shell out 1k if I'll never max out the stock ones.
I live in a place that only has 91oct - Coupled with Methanol Injection,

If I can get by with just the 5bar, I'll stick to that cheaper route.

And Nope.. No E85 here. haha...

Mar 7, 2015 | 08:22 PM

rix

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Stock injectors and a 5 bar are good for stock turbos and E85, so anything you do on stock turbos will be fine. If you're doing Alpha turbos you might as well do the injectors at the same time.

VTGs seem to work fine with very slight injector upgrades or a 5bar FPR on normal gasoline. Things get hairy with E85.

Mar 8, 2015 | 03:39 AM

elite1

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What 5 bar for is everyone changing to?

Mar 8, 2015 | 03:52 AM

93ls1rx7

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I think the consensus is the actual Bosch one, not the ones that are 3 bar and have been modified.

Mar 8, 2015 | 01:29 PM

Mitchy

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So is it safe to assume that with no E85, the stock injectors without the 5Bar reg should handle all that the Stock VNT's can give,

With the addition of the 5Bar reg, it can probably handle the larger 65 & 68mm VNT upgrades

Anything else (alpha, etc) will require the larger injectors...

E85 is a different animal.

Mar 8, 2015 | 08:59 PM

dhahlen

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I run 1000cc injectors and I can max out fuel around 750 wheel with 65mm vtg - on e85

Mar 9, 2015 | 08:29 AM

Mark @ AIM Performance

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Quote:

Originally Posted by elite1

What 5 bar for is everyone changing to?

New Bosch Motorsport one is E85 compatible.

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Mar 9, 2015 | 11:27 AM

Yogi911

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Can a stock car run on larger injectors (ID1000s). I.e. if it is not tuned but if you want to change injectors for future upgrades or e85?

Mar 10, 2015 | 03:23 PM

tt91185

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Contact Mitch at Cobb tuning, I have 1000cc injectors and tune waiting to be put in and was sold on this setup when a buddy of mine running ep2, intercoolers, injectors and a Cobb tune put down 569awhp on 93 and just under 600awhp on e85. The car is an animal when it needs to be.