-stock bore LT1
-3.5" stock chevy crank
-4-bolt splayed main caps
-forged H-beams
-12:1 forged pistons
-LE3 heads
-custom grind cam for LE3 heads
-single-plane intake

I am debating on the intake. Thinking about sticking with the stock intake and getting it ported. I heard that guys are making 500rwhp with the stock intake. Anyway, criticize away guys.

I've already got all supporting mods (hooker longtubes, 3" duals, electric water pump, etc.)

I hope to make 500rwhp with this setup.

 

500 rwhp is kinda lofty goal. Without gettin stupid.

 

Stage 3 heads can comsume low RPM torque on a stock cube engine. Bigger isnt always better.. Well, at least not always.

 

Thats setup will be good for a max of 430-440rwhp with an LTX intake. I dont see 500rwhp happening at all.

 

500rwhp is a hard number to swallow.. But it's doable.. you'll def need that Single plane intake to hit that number though..

 

As the others have said, you really have no chance at 500rwhp I also don't (others may disagree) see the need for a single plain with those cubes and rpm range.

 

Also, if your not running a solid roller, it will be harder to hit the "500rwhp" number.

 

No chance with stock LT1 castings, sorry.

 

It's possible with stock LT1 castings, but few are willing to stay with them to that point. It would take the following:

Welded pushrod pinch
offset rockers
solid roller (7000ish rpm peak)
FAST or similar since it will likely wind out to 7800 or so
converted super vic
lots of tuning

I know there is an LT1 headed engine that exists that made 600flyhp using LE2 heads, but very few people are willing to put this kind of time, effort, and most of all $$$ into a stock head casting setup.

600fwhp should be good for 500ish rwhp with an M6

 

i do not see that combo making 500.

 

Well once I get this 355 together and it's dynoed we will see what that setup can do. I think you might be suprised.

Bret

 

Your 355 or this one from Kurt?
Making 500 from a 355 is doable, but do I think Kurt has the parts (as listed) to do it, no.

 

No I'm doing one for a customer that's basically that setup. LE3 heads, single plane and a well built 355 with a hyd roller. I think you can do high 400rwhp with something like that. I've done 600fwhp with basically that on a 383 with LE2 heads and a solid roller...

Bret

 

I see that guys have eclipsed the 500 mark with lt1 castings, and I"m not saying that I can do it just because they can, but I do think if guys can make 430rwhp on average with fully ported heads and supporting mods, I think that the single-plane can carry me to around 50 more hp.

I do not care about losing low end power. This is not a daily driver. However, since I have time to think about, I could consider a bigger stroke.

 

Who are these guys?