[clg82]

Originally Posted by JANNETTYRACING

The low side pressure drops which in turn shortens the range of the high pressure pump and injectors.

A JMS fuel system voltage booster easily extends the range past 700 RWHP.

My 2018 ZL1 and many many others make 670 RWHP on E-60 with the stock blower and I have been 725 on race gas with the LT4 fuel systems.

It is also important to achieve commanded Lambda which is .82 for me.

If you are .78 you will shorten up the range as well.

Ted.

Would you consider my 702 without any fuel upgrades an outlier then?

[SATINSTEEL1LE]

Originally Posted by clg82

Would you consider my 702 without any fuel upgrades an outlier then?

Personally I'd like to see your logs of the low and high side fuel pressure, and then we'd know if you are an outlier with a safe combo or you are running on the ragged edge. I see others show their logs where low side is dropping from 76 commanded to low 60s and shops consider that ok. Thats not ok...lol

[Joshinator99]

Originally Posted by clg82

Would you consider my 702 without any fuel upgrades an outlier then?

Not necessarily. Happy dyno, a tune that is leaner than .82, or a run that was dangerous (not meeting commanded low or high fuel pressure, or over 6.0ms IPW) can all come into play. More than one way to get a number that appears to be an outlier.

[CW3SF]

If you are replacing the supercharger it’s really easy to do the HPFP and injectors while the stock blower is off. I get that they are not cheap but you can sure make a lot more power. Especially with a JMS on the low side too.

[clg82]

Originally Posted by SATINSTEEL1LE

Personally I'd like to see your logs of the low and high side fuel pressure, and then we'd know if you are an outlier with a safe combo or you are running on the ragged edge. I see others show their logs where low side is dropping from 76 commanded to low 60s and shops consider that ok. Thats not ok...lol

Originally Posted by Joshinator99

Not necessarily. Happy dyno, a tune that is leaner than .82, or a run that was dangerous (not meeting commanded low or high fuel pressure, or over 6.0ms IPW) can all come into play. More than one way to get a number that appears to be an outlier.

Interesting thoughts here, thanks everyone. How without contacting the tune am I able to take the logs of what you guys are looking for? Don't want to bother the tuner to send me the logs if I don't have too. Their a pretty reputable tuner here in so-cal so I wouldn't expect them to do anything dangerous.

[Joshinator99]

Originally Posted by clg82

Interesting thoughts here, thanks everyone. How without contacting the tune am I able to take the logs of what you guys are looking for? Don't want to bother the tuner to send me the logs if I don't have too. Their a pretty reputable tuner here in so-cal so I wouldn't expect them to do anything dangerous.

Data log with HP Tuners. Their YouTube channel has a lot of videos to give you a crash course on how it works.

[JANNETTYRACING]

Originally Posted by clg82

Would you consider my 702 without any fuel upgrades an outlier then?

JMS is a fuel system upgrade.

I don't see a problem as long as you do an Upgrade, Strongly recommend the JMS fuel system voltage booster to feed the FSCM what is needs to control the pump.

Ted.

[JANNETTYRACING]

Originally Posted by clg82

Interesting thoughts here, thanks everyone. How without contacting the tune am I able to take the logs of what you guys are looking for? Don't want to bother the tuner to send me the logs if I don't have too. Their a pretty reputable tuner here in so-cal so I wouldn't expect them to do anything dangerous.

You will need an HPtuners device to get the proper logs you can order a device from us without ordering a custom remote tuning session.

However there is a 199.00 savings on the tuning if you order them together even if you don't plan to tune immediately there is no expiration date on the session.

https://jannettyracing.com/collectio...uning-packages

[JANNETTYRACING]

Originally Posted by SATINSTEEL1LE

Personally I'd like to see your logs of the low and high side fuel pressure, and then we'd know if you are an outlier with a safe combo or you are running on the ragged edge. I see others show their logs where low side is dropping from 76 commanded to low 60s and shops consider that ok. Thats not ok...lol

You learn fast student!

[KingLT1]

If a car makes 530whp base line, 140-150whp of additional fuel support is going to max out the stock fuel system on pump. So that is 670-680whp.

If a car base lines 560whp, then it will likely run out at 700-710whp on pump.

Being able to produce 670whp with E60 @ .82 on stock fuel system tells me the dyno reads high. Give us some dragy data or track times to go along with that number.

From what I have seen a FBO ported blower car with 2.117 pulley making 14psi needs +30 injectors, LPE pump, and JMS low side to hold E60 @ .83. The car made 660/670 on a Mustang Dyno but 60-130's 6.0's and traps 136 in the 1/4 full weight on 20" wheels.

Point is that it's pointless to try and cross compare peak dyno numbers. You need a baseline and then compare power gains from baseline.

[JANNETTYRACING]

Originally Posted by KingLT1

If a car makes 530whp base line, 140-150whp of additional fuel support is going to max out the stock fuel system on pump. So that is 670-680whp.

If a car base lines 560whp, then it will likely run out at 700-710whp on pump.

Being able to produce 670whp with E60 @ .82 on stock fuel system tells me the dyno reads high. Give us some dragy data or track times to go along with that number.

From what I have seen a FBO ported blower car with 2.117 pulley making 14psi needs +30 injectors, LPE pump, and JMS low side to hold E60 @ .83. The car made 660/670 on a Mustang Dyno but 60-130's 6.0's and traps 136 in the 1/4 full weight on 20" wheels.

Point is that it's pointless to try and cross compare peak dyno numbers. You need a baseline and then compare power gains from baseline.

That is kind of a blanket statement talking about Dyno to dyno and I can't necessarily agree.

In my experience Fuel quality plays a big role in base numbers as these cars are very Knock limited by fuel.

I have had some dyno low 530 with bad fuel and same car with good fuel make 560.

My personal car dynoed 560 on good pump 93 and 580 on Sunoco GT 100.

Same car with my 125 flex fuel road race package NO PULLEY CHANGES, makes 670 on E-65 which is where the fuel system starts to show signs of maxing out.

I routinely raced my car on the road coarse with E-60 as well as many other customers.

Take away the E and you gain quite a bit of Head room.

SatinSteel1LE has a Magnuson 2650 and a JMS, I tuned is car to just a hair under 700 and still have some room on fueling.

[SATINSTEEL1LE]

Originally Posted by JANNETTYRACING

That is kind of a blanket statement talking about Dyno to dyno and I can't necessarily agree.

In my experience Fuel quality plays a big role in base numbers as these cars are very Knock limited by fuel.

I have had some dyno low 530 with bad fuel and same car with good fuel make 560.

My personal car dynoed 560 on good pump 93 and 580 on Sunoco GT 100.

Same car with my 125 flex fuel road race package NO PULLEY CHANGES, makes 670 on E-65 which is where the fuel system starts to show signs of maxing out.

I routinely raced my car on the road coarse with E-60 as well as many other customers.

Take away the E and you gain quite a bit of Head room.

SatinSteel1LE has a Magnuson 2650 and a JMS, I tuned is car to just a hair under 700 and still have some room on fueling.

Ted knows Im a log-acholic and Im constantly looking at mine with HP Tuners. At this point where we left it, my low side is steady at 76psi even a bit more at times all the way to redline. My highside same thing sits at commanded 2900 and I see 3000 even. And my injpw tops out at 5.15ish. For the cam * for the high side fueling I usually see about 119* to 120*ish MAX. So from what I understand, I have a bit more headroom. Not that I would push it any farther. Here's a screen cap from my latest log.

[clg82]

Originally Posted by SATINSTEEL1LE

Ted knows Im a log-acholic and Im constantly looking at mine with HP Tuners. At this point where we left it, my low side is steady at 76psi even a bit more at times all the way to redline. My highside same thing sits at commanded 2900 and I see 3000 even. And my injpw tops out at 5.15ish. For the cam * for the high side fueling I usually see about 119* to 120*ish MAX. So from what I understand, I have a bit more headroom. Not that I would push it any farther. Here's a screen cap from my latest log.

How much boost are you running?

[KingLT1]

Originally Posted by JANNETTYRACING

That is kind of a blanket statement talking about Dyno to dyno and I can't necessarily agree.

In my experience Fuel quality plays a big role in base numbers as these cars are very Knock limited by fuel.

I have had some dyno low 530 with bad fuel and same car with good fuel make 560.

My personal car dynoed 560 on good pump 93 and 580 on Sunoco GT 100.

Same car with my 125 flex fuel road race package NO PULLEY CHANGES, makes 670 on E-65 which is where the fuel system starts to show signs of maxing out.

I routinely raced my car on the road coarse with E-60 as well as many other customers.

Take away the E and you gain quite a bit of Head room.

SatinSteel1LE has a Magnuson 2650 and a JMS, I tuned is car to just a hair under 700 and still have some room on fueling.

It isn't a blanket statement at all. Post a 60-130 time of you 670whp car with the 125whp flex package. I bet they are low 7's full weight. Which supports my point that dinos read different and cross comparing is pointless without a baseline