[JANNETTYRACING]

Originally Posted by KingLT1

Thanks

I figured you probably ran out of fuel. We found the limits of the LPE DI pump on E80 @ 8psi. Hard to compare power because 5th gear was used. I imagine dropping back to E60 would free up quite a bit of headroom.

With what injectors and low side?

[KingLT1]

Originally Posted by JANNETTYRACING

With what injectors and low side?

LT4 injectors
LPE DI pump
ZL1 low with JMS booster

[JANNETTYRACING]

Originally Posted by KingLT1

LT4 injectors
LPE DI pump
ZL1 low with JMS booster

Seems odd to me must be stock cam also.

My ZL-1 made 668 RWHP on 10 psi boost on stock fuel system parts.

[JANNETTYRACING]

Originally Posted by KingLT1

Thanks

I figured you probably ran out of fuel. We found the limits of the LPE DI pump on E80 @ 8psi. Hard to compare power because 5th gear was used. I imagine dropping back to E60 would free up quite a bit of headroom.

Yes sir, I am just using boost to fuel combinations as reference.

[KingLT1]

Originally Posted by JANNETTYRACING

Yes sir, I am just using boost to fuel combinations as reference.

So you are saying my stock cam SS A8 with a 3.5 pulley Whipple (8psi), shouldn't be at it's limits on E80 with those fuel system upgrades?

[JANNETTYRACING]

Originally Posted by KingLT1

So you are saying my stock cam SS A8 with a 3.5 pulley Whipple (8psi), shouldn't be at it's limits on E80 with those fuel system upgrades?

I would have expected the LPE pump to extend that a bit.

Ted.

[KingLT1]

Originally Posted by JANNETTYRACING

I would have expected the LPE pump to extend that a bit.

Ted.

That that is why I asked if you tested any further because you used E60 with the LT4, so I figured E80 must be putting quite bit more strain on the system. or the AFR is too rich. I should know the fueling and afr data here shortly. I too expected the LPE to have more headroom.

[JANNETTYRACING]

Originally Posted by KingLT1

That is why I asked if you tested any further because you used E60 with the LT4, so I figured E80 must be putting quite bit more strain on the system. or the AFR is too rich. I should know the fueling and afr data here shortly. I too expected the LPE to have more headroom.

I recently tested my car with E-70 and I am just starting to see low side fuel pressure drop

[KingLT1]

Originally Posted by KingLT1

So with a Whipple on stock pulley, primary cat deletes, Rotofab, LT4 fuel system, Pump booster, and E78, will I have enough fuel supply? If not will the LPE big bore give me enough?

Originally Posted by JANNETTYRACING

Only Careful logging will tell for sure but I suspect you will be OK at 8-9 PSI boost.

Also the tuning is a Key player in all of this.

Ted.

Just to clarify, I was reporting back that it took the LPE pump to have enough fuel for E80 on a SS with the mods above. That is why I bumped this thread back up asking if you tested any further with different pullies and more E content on the Whipple SS car.

I don't understand how a ZL1 correlates here being it has a different cam driving the HPFP compared to a SS.

My low side is fine and pressure is holding with the JMS and ZL1 in-tank.

[JANNETTYRACING]

Originally Posted by Hyperlinkblue

So theres a new table in hp tuners?, what exactly can you do with FPCM?

We can adjust the pressure.

[F419sr1]

I spoke with your shop today about low side fuel. I’m going to bring the car up Monday

[JANNETTYRACING]

Originally Posted by F419sr1

I spoke with your shop today about low side fuel. I’m going to bring the car up Monday

Awesome Thank you for your business.

Ted.

[Alpha6gen]

Nice gains

I have a simple question for you, my car has a maggie kit and we only get 91oct pump ! Can I run 90mm or 85mm pulley with LT4 fuel system and E85?

[JANNETTYRACING]

Originally Posted by Alpha6gen

Nice gains

I have a simple question for you, my car has a maggie kit and we only get 91oct pump ! Can I run 90mm or 85mm pulley with LT4 fuel system and E85?

With our LT4 fuel system upgrade package which includes a JMS FPVB you can easily run the 90 mm pulley on E-85 and the 85 mm pulley on E50