[asthmamax11]

I remember in 2016-2018 alot of shops were upgrading to a Camshaft with bigger fuel lobes instead of changing the fuel system or spraying Methanol.

Anyone have experience with this ?

[Joshinator99]

Originally Posted by asthmamax11

I remember in 2016-2018 alot of shops were upgrading to a Camshaft with bigger fuel lobes instead of changing the fuel system or spraying Methanol.

Anyone have experience with this ?

Doing that simply gives the HPFP more headroom, usually 32-42% depending on the cam & HPFP in question. It doesn’t fix the low side or injectors, so as always you need to log:
1. Low side commanded & actual pressure
2. High pressure rail commanded & actual pressure
3. Injector pulse width

Maybe KingLT1 will chime in….I swear he’s memorized exactly how much HP each fueling mod can support.

[laynlo15]

Originally Posted by asthmamax11

I remember in 2016-2018 alot of shops were upgrading to a Camshaft with bigger fuel lobes instead of changing the fuel system or spraying Methanol.

Anyone have experience with this ?

Why would you do that when you can pull the 2300 and add TooHighPsi Port Injection. Then you don't have to worry about tearing the motor down, leave the stock cam and make 700 rwhp on 11 psi of boost on E65 as I do. No brainer.

[cjperformance]

Originally Posted by laynlo15

Why would you do that when you can pull the 2300 and add TooHighPsi Port Injection. Then you don't have to worry about tearing the motor down, leave the stock cam and make 700 rwhp on 11 psi of boost on E65 as I do. No brainer.

I'll second that. Really good experience with that system, and the support i recieved when i had a technical glitch was TOP NOTCH.

Still need low side improvements though.

If you are going to dig in to the engine for other things anyway a cam might make sense, but cant complain about the THPSI setup.

[Dynamical]

Originally Posted by laynlo15

Why would you do that when you can pull the 2300 and add TooHighPsi Port Injection. Then you don't have to worry about tearing the motor down, leave the stock cam and make 700 rwhp on 11 psi of boost on E65 as I do. No brainer.

Do you still have the AFM/DOD lifters/equipment?

Would your setup still be safe if setup to run on 93 pump gas?

[KingLT1]

Originally Posted by Dynamical

Do you still have the AFM/DOD lifters/equipment?

Would your setup still be safe if setup to run on 93 pump gas?

No the stock LT1 cannot survive 700whp on 93 at stock compression. cylinder temps are too high with too tight of ring gap. Install a cam to bleed off some dynamic compression it would have a better chance or even better lower compression with drop in pistons and it will make good power on 93.

The path of least resistance with the best bang for buck is what Laynlo suggested. ToohighPSI port kit with a low side upgrade and you can run E60-E80 and the stock LT1 will live in the 700whp range.

You might as well forget about 93 octane and start thinking about E85. This isn't the LS1 days. These high compression engines love the octane and need the cooling from Ethanol to make reliable power.



To answer the OP question. No the LT1 injectors are not capable enough. If you did LT4 fuel system and 38% cam you could get upwards of 780-800whp on E50-60. Probably could run full E if you kept power in the lower 700's. Shops were changing cams and not upgrading the fuel system because there wasn't any fuel upgrade options at the time and nobody fully understood the tuning side of things.

[laynlo15]

Originally Posted by Dynamical

Do you still have the AFM/DOD lifters/equipment?

Would your setup still be safe if setup to run on 93 pump gas?

Yes, everything is totally stock. AFM/DOD is turned off. If your just going to run 93 octane I can't see a benefit running the TooHighPsi, its really meant to run E85 or lower depending of the low side fuel system.

[laynlo15]

Originally Posted by KingLT1

No the stock LT1 cannot survive 700whp on 93 at stock compression. cylinder temps are too high with too tight of ring gap. Install a cam to bleed off some dynamic compression it would have a better chance or even better lower compression with drop in pistons and it will make good power on 93.

The path of least resistance with the best bang for buck is what Laynlo suggested. ToohighPSI port kit with a low side upgrade and you can run E60-E80 and the stock LT1 will live in the 700whp range.

You might as well forget about 93 octane and start thinking about E85. This isn't the LS1 days. These high compression engines love the octane and need the cooling from Ethanol to make reliable power.



To answer the OP question. No the LT1 injectors are not capable enough. If you did LT4 fuel system and 38% cam you could get upwards of 780-800whp on E50-60. Probably could run full E if you kept power in the lower 700's. Shops were changing cams and not upgrading the fuel system because there wasn't any fuel upgrade options at the time and nobody fully understood the tuning side of things.

Totally agree with King.

[Dynamical]

Originally Posted by laynlo15

Yes, everything is totally stock. AFM/DOD is turned off. If your just going to run 93 octane I can't see a benefit running the TooHighPsi, its really meant to run E85 or lower depending of the low side fuel system.

That's just awesome to me. Are you worried about those stock lifters failing at all? For the time being, I have the range so it stays in V8. I planned on taking all that AFM stuff out when a cam goes in but now I'm seeing all these FI setups like yours and I wouldn't mind having that
But E for me isn't really an option. I may have to look into Methanol injection instead.

[KingLT1]

Most dod lifter failures happen when they are active. Disabling them usually curbs any issue. I have had a Whipple on my stock engine since 2019. The car has made over 200 dragy pulls. It traps 137 full weight on the 20" wheels. Basically I have a stretch of concrete industrial road I test on. Car runs 10.5 @ 137 rolling into it from second gear with no prep on a 305/35/30 555r2. It would be a 140mph car on a full drag pack. I didn't do Port Injection simply because it wasn't cost effective at the time. It was easier/ more cost effective to do +30 injectors and LPE di pump before the price doubled. I run E60 and 10-11psi. Probably real close to Laynlo's car power wise. His is faster being on the drag pack and A10 traps a little harder. I am also running more conservative with the timing. Either way it's plenty of power for a street car. right on the edge of what you can use on the street from a 40 roll. I have driven/rode in and tuned these cars all the way up to 1000whp. So I have a pretty good idea how this platform handles power.

Point being if you do a fuel system and run E50-80, these engines will handle some boost and make good power without totally having to dissect the engine for internal upgrades.

[asthmamax11]

Originally Posted by laynlo15

Why would you do that when you can pull the 2300 and add TooHighPsi Port Injection. Then you don't have to worry about tearing the motor down, leave the stock cam and make 700 rwhp on 11 psi of boost on E65 as I do. No brainer.

You definitely have the ideal setup.
I was just thinking the DoD delete might be a neccessity and might as well upgrade the Cam while we're at it