My last dyno was 446rwhp.

The changes I made this time were:
Victor Jr EFI intake
Custom Joe Overton Solid Roller
Fast
Acufab 2100cfm TB

I had a solid roller in the car last time so it's just a different grid on a 108ls

New numbers are:
500.4rwhp & 456.1rwtq

This is on a 398cid that I had just freashened up. Still needs to break in, but that's what she made. Heads are AFR 210's ported by GTP.

Neal

 

How different is the cam are you trying to say same lobes on different LSA?
I would also be interested in the torque curve typical asumption would be the single planes longer runners should have helped it down low.

 

Last cam that was in it
250/256@.050 644/614 lift 112ls

the one that's in it now is
270ish@.050 670lift 108ls.

It made peak TQ at just past 5k. Never dropping below 400. I'll have to compare the two graphs. I was just happy to see 500 at the wheels. I also dynoed it with 28" slicks. I'd like to through on my street tires and see what the difference is?

Neal

 

"just" a different grind

 

lmao........yeah, thats a pretty starkly different cam.


regardless..........badass numbers, congrats!

 

Congrats on the 500rwhp. You accomplished something that many other people only dream about.

Any pictures of the new intake and such? I've only seen pictures of a couple of others with a single plane manifold.

 

I will put pic's up later tonight or tomorrow. I think with a little more dyno time and break-in I hope to see 515rwhp. I'm heading to the track today. Only problem is I race at a mile up. Track elevation is 5,300 feet. Da is right around 6,500 today. I'm hoping to go low 11's to high tens's. Wish me luck.

Neal

 

what RPM are ya shifting at?

 

What rpm did it peak at?

Dave

 

Just curious, why did you choose the Victor Jr.?

 

i was hoping you would give us a better idea of how much the single plain intake helped you... Im wondering how much power doing that would help on a regular h/c 350 setup

 

Jon, I think he is talking about the Victor E intake...... I've shared with you my thoughts on that thing. None the less this really does illustrate the advantages of a good intake design over the LT1 intake.

Bret

 

I will conceed that you know more than I and respect your thoughts and opinions, but how does this support changing the intake, the cam swap about makes the comparison pointless beyond saying the new combo made more power.

 

It's the power numbers involved. I've had some 383's with Single Plane intakes and LT1 head castings make 600-650hp on the engine dyno with a big solid roller like this. There is no way to make those kinds of numbers with a LT1 intake and a solid roller and LT1 castings.

His intake and cam swap is the right way to do that since the longer runners will like more camshaft. Yeah it would be nice to see just a intake swap for comparison sake, but one of the reasons this thing is making so much power is because of the intake swap, not just the cam.

Bret

 

has anyone done just the intake swap? if so how much power did it gain? i have a 396 with the LT4 topend. the car ran 10.57@127 fri. night in 58* weather. i would think the bigger motors would like the vic E but i would also like to see someone that has done it.