[Sillysspeed]

So I got the P1x on otherwise stock lt1 car. On lt4 fueling it’s maxed out in cold weather at e50. It’s making around 7psi max. I’d like some more power. What do you guys suggest next?

[KingLT1]

Port Injection

or

Piston, Rods, Cam

At this point it's hard to recommend LPE HPFP and XDI +30 injectors with the recent price increases but it's an option. That's what I have currently and the car traps 137 @ 10psi full weight on 20's in 500 da running E60. But I paid about half of what this fuel system would cost today.

[Joshinator99]

Agree with King. Tough to beat TooHighPSI port injection system here in 2023.

Silly: think about your real goals for the car. Otherwise you’ll end up buying parts, only to change them out a year later when the new power goal exceeds what you installed…

[LT1ornothing]

Originally Posted by Sillysspeed

So I got the P1x on otherwise stock lt1 car. On lt4 fueling it’s maxed out in cold weather at e50. It’s making around 7psi max. I’d like some more power. What do you guys suggest next?

Agreed with King and Josh, those are your 2 best options. Keep in mind, that P1X will start to run out of steam when you pulley down a couple sizes. You are currently at the fuel limit and not too far off from the blower limit. I'd leave it as is, or get ready for a full build including both engine and blower upgrade. Another option would be sell it as is and get into a ZL1 and build that. It will end up costing the same either way in the end.

[laynlo15]

Originally Posted by Sillysspeed

So I got the P1x on otherwise stock lt1 car. On lt4 fueling it’s maxed out in cold weather at e50. It’s making around 7psi max. I’d like some more power. What do you guys suggest next?

Port injection all the way. I have it and I love it. Best bang for the buck right now, best thing since chocolate milk.

[Sillysspeed]

How about a smaller pulley and like e30 with a small shot of meth?

[Joshinator99]

Originally Posted by Sillysspeed

How about a smaller pulley and like e30 with a small shot of meth?

Are you on a stock bottom end? A lot of SBE carnage on this board over the years from owners trying to use meth instead of proper fueling FYI…

[KingLT1]

Originally Posted by Joshinator99

Are you on a stock bottom end? A lot of SBE carnage on this board over the years from owners trying to use meth instead of proper fueling FYI…

Build back better.

[JSH]

It's so much easier to run race gas

[Joshinator99]

Originally Posted by KingLT1

Build back better.

That’s the spirit!

Originally Posted by JSH

It's so much easier to run race gas

Not sure about that. Sure, your fuel system stretches a lot further HP-wise.

But I feel like that’s where the good news ends? You can’t go very far on the street without needing to get pump gas, so you sure as hell don’t want to go WOT with 93 but be in the race gas tune. Then when you want to run race gas again, you have to get virtually all the 93 out of the tank again. E just tunes itself depending on how much you’re running at the time. And race gas isn’t available very readily around here either (although neither is E85 if I’m being honest).

I don’t know…maybe I could be talked into it lol. Would probably save me a lot of money from having to add port injection…

[KingLT1]

Keep in mind the cost of 104 octane race gas is over 13.00 a gallon.

If you drive 3000 miles a year at 15 mpg, that's 2600.00 in race fuel vs 600.00 in E85. In 1 season you just paid for most of a ToohighPSI setup.

I would wager two things happen in this scenario.

1) The car no longer gets driven due to the cost of race fuel.

2) The car lives detuned on 93 because of inconvenience of flashing tune and ridiculous cost of race fuel.


*I do agree that race fuel allows the fuel system to go much further. Either way there is no free lunch on this platform. Pros and Cons either way you go.

[laynlo15]

I went thru the race gas era on my 16SS, spent a lot of money at 14.00 a gallon on Ms109, believe me I went thru a lot of it running 8 to 10 races a year for 3 years. Just do port injection and you'll save money in the long run. I wasn't even driving my car on the street because it was so much trouble messing with going back to 93 octane at the time. GO E.

[Joshinator99]

Originally Posted by KingLT1

Keep in mind the cost of 104 octane race gas is over 13.00 a gallon.

If you drive 3000 miles a year at 15 mpg, that's 2600.00 in race fuel vs 600.00 in E85. In 1 season you just paid for most of a ToohighPSI setup.

I would wager two things happen in this scenario.

1) The car no longer gets driven due to the cost of race fuel.

2) The car lives detuned on 93 because of inconvenience of flashing tune and ridiculous cost of race fuel.


*I do agree that race fuel allows the fuel system to go much further. Either way there is no free lunch on this platform. Pros and Cons either way you go.

Originally Posted by laynlo15

I went thru the race gas era on my 16SS, spent a lot of money at 14.00 a gallon on Ms109, believe me I went thru a lot of it running 8 to 10 races a year for 3 years. Just do port injection and you'll save money in the long run. I wasn't even driving my car on the street because it was so much trouble messing with going back to 93 octane at the time. GO E.

This is how I felt all along but good to hear others thinking the same way.