vtknight

Hi everyone,

To all Vendors - I was told there were LT4 fuel upgrades coming for our cars in October.

Does anyone have any information on this?

Even if if it isn't this season - any ETA?

Thank-you!

WS6JJP

I called weapon x a few weeks ago and they said there is something coming but not anytime soon. In fact, they had no idea of when.

vtknight

Thank-you for that - I have heard the same. I am hoping that ID or any other groups (Katech, LPE, AMP, Vengence etc.) will have some information on the topic.

Sam@amp

You can make plenty of power with the factory DI pump if the fuel pump and lines feeding the DI pump are upgraded.

Does you car have the stock cam? Does your car have methanol injection?

WS6JJP

Does anyone make direct fit parts for those? And when you say you can make plenty of power, if those other fuel components that you mentioned are added, will that enable you to run full E85 without having to run meth or a bigger cam lobe?

Sorry vtknight, didn't mean to hijack your thread.

vtknight

We will have to disagree here. That said, "plenty of power" is subjective lol. Higg's can chime in better than I - but I agree - adding a cam with the appropriate fuel lobe is the first step - but not a real "fix". I have a two nozzle meth solution - without a cam at the moment. I recognize that the cam will definitely allow better fueling. I am running an F1A PC (my car is an M7).

From what I know - some shops are combining port injection or port-meth injection to get at the higher power levels. A larger mechanical pump seems to be the key as the 3000 PSI pumps are pretty beefy. How DI is used is critical of course - when and how much it "sprays".

I'm interested to hear what - if anything is being developed for the C7 Z07 regarding fueling mods.

Sam@amp

I made 1200 rwhp with the stock DI pump on straight C16 NO methanol. It makes a little over 1300 with the methanol. The only "upgrades" being the 32% cam lobe and the low side pressure fuel system regulated to 72 psi with a -8 fuel line feeding the DI pump.
This same system would supply enough fuel for 850-900rwhp with a PC on E85.

The main reason why most shops refuse to talk about how they make power using the stock DI pump is because someone without the experience is willing to say it cant be done.

ajrothm

Are you going to sell plug n play low pressure side fuel system upgrades or is it in house install only?

I would love to do flex fuel and be able to run 100% E85 and not have to mix it... Maybe around 700 rwhp E85 only is all I would be looking to do this time around, but without a cam swap(no upgraded lobe)

vtknight

Thank-you for your response - that was my understanding as to how you achieved the power - cam fuel lobe with a low side pressure fuel system (I know a few people in your camp). I really appreciate you being forthcoming. Two main questions; in your experience - how stable is the side pressure fuel system and will it be more stable for my less powerful requirements (850-950 whp)? I'm making ~800 whp now on pump fuel on meth without a cam. As per the poster above - will you provide these systems or are they in house only?

You can PM me if you would rather...

I plan to add the cam and do some of the internals (valve train) and maybe heads.

Thanks!

vtknight

Bump for AMP - any news on low side pressure pump upgrades? In house only?

Thanks!

HNK

Hi

my fuel pressure goes down to 57.9 @ wot. I have a 15% pulley, cai, headers and 103mm TB and ported snout. I read somewhere when pressure drops below 60 a fuel upgrade is needed. Is that true?

No methanol
straight pump gas

if needed, which upgrade will be enough?

HNK

Anyone???

strapp

Ttt

chevyfanatic

Thats nuts ! how are you making 800 whp and almost stock ? what are you mods ? heads/E85/headers ?

Katech_Zach

We are no pursuing one. We've been waiting for the Lingenfelter pump.

chuntington101

Is there nothing off another model of car that could work for the LT engines? There are many direct injection engines out there now. But I guess nothing in the 1000bhp plus range! Could be a good market though if someone could come up with an affordable solution.

Maybe the ZR1 will bring an option.

Jason, what's you feeling on the limits of the stock unit with sufficient low side pressure and capacity (and cam obviously)? I have heard over 1000rwhp being mentioned on proper race fule (112 octane)!

Sorry it was Sam @ amp that mentioned 1200rwhp with 112. Sorry Sam I forgot you posted that in this thread! Doh!

Katech_Zach

I'm just starting to touch the limit on my car. I made 760rwhp on E85 with a +38% fuel lobe. So that's like 988rwhp on E0.

Warp Factor

If the E0 had the same octane and cooling benefits as E85

Katech_Zach

This is true.

FYREANT

Subscribed. Hoping SOMEONE comes out with a "plug and play" low side fuel system upgrade soon!