Procharged/Nitrous Power on Forged L76

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Sep 18, 2018 | 10:54 AM

EatMoreChikin

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Procharged/Nitrous Power on Forged L76

I'm currently fine tuning a build I recently completed. It's a forged L76 block running a F1A procharger, dual nozzle meth with all the supporting bits. The car made 1071/1097 at 3500 DA with no knock and has ran perfectly smooth. The thing is a beast with the main limiting factor being traction. I'm wondering if I'm at the limit of what the block can handle because I still have a nitrous system that is in the car that I have not began to work with yet. At this point, I am thinking that the standard heads will begin lifting despite the ARP 2000 studs. The blower is not even maxed yet so I think I may just have more power that can be made available than the block can handle.

I'm just curious what others have pushed their L76s (basically a LS2) to somewhat reliably?

Sep 18, 2018 | 06:54 PM

Prowler

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Be happy with what u have.

Sep 19, 2018 | 03:38 PM

Bob@BruteSpeed

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If you feel like you need more power, a very small shot of nitrous would drop the inlet air temps. Bob

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Sep 24, 2018 | 12:29 PM

95-1LE-Z28

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Quote:

Originally Posted by EatMoreChikin

The blower is not even maxed yet so I think I may just have more power that can be made available than the block can handle.
?

I'm curious how an F1A pushing 1071 to the wheels isn't maxed out. What is your pulley combo? I have an 8.65 crank pulley and a 4.13 blower pulley and at 6500rpm the F1A is almost at the max impeller rpm and I don't think I'm anywhere near 950rwhp let alone 1K plus. This is on a 408 btw. Once again I'm just curious what pulley combo you're running and what RPM you're shifting at.

Thanks

Sep 24, 2018 | 02:18 PM

Kfxguy

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Can't hook. Add more power. Makes sense. lol

cletus had an aluminum block 5.3 that held over 1200hp. I'm no professional but I'd imagine an iron block could hold as much or more. I'd think if you added 100-150hp more you wouldnt be able to tell unless you just wanted to roast the tires to 160 instead of 150mph..or your just chasing dyno numbers.

Last edited by Kfxguy; Sep 24, 2018 at 02:25 PM.

Sep 24, 2018 | 02:28 PM

Kfxguy

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Wait, i noticed you said you have a forged block. Ive never seen a forged block before but a forged block vs a cast block should hold as much power as you could ever make. That is, if it is really a FORGED block.

Sep 24, 2018 | 02:43 PM

EatMoreChikin

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Quote:

Originally Posted by 95-1LE-Z28

My crank pulley is just slightly bigger than stock. I'd have to look the ATI part number up again. I had to pulley up on the blower from a 4.00 to a 4.13, I believe to keep the boost under 20psi. I could throw the 4.00 back on and probably be right at max impeller speed at 6600-6800 where I shift.

Car hooks fine on the track on a 29.5 x 10.33 slick so I feel I could still spray some on the big end if the rods/pistons can take it, but I'm wondering if it has more to do with the cylinder pressure at this point.