I don’t think I asked, but I’m pretty sure they’re running it on pump gas.

They were baselining the motor with the std Victor intake and a shop carb, and are swapping to an Edelbrock EFI system.
I believe it’s going on a street car.

C’mon Don.......”extremely optimistic”?

What should it make?

Well, as someone with 30 years of dyno testing to call upon, I’m confident that if I built a 10.5:1 416 with TF heads, that cam, intake and headers....... it would easily exceed 550hp.

People like to quote the Moroso chart when it fits their narrative...... until you mention “Stock” or “Super Stock”....... then for some reason it doesn’t apply.

If we say the Moroso Chart is more accurate and reliable than a modern dyno, then I guess my friends 400 Pontiac, with its unported heads, .420 lift cam, stock intake and Q-jet makes around 545hp........ even if it makes nowhere near that on the dyno.

My 408 has been 10.70 in my 3150 lb. Dart.. 539 hp. 502 tq. on dyno .. 408.. 4 inch stroke R3 Block, 9 1/2 to 1 compression for pump gas, out of box Indy 360-1 heads and intake, 600 lift mechanical cam. 1 7/8 inch headers, AED prepped 750 HP carb. easy low 10s / high 9s with more compression, roller cam and a little head work. I am very impressed with the torque from the 4 inch stroke, I went from a 4.88 gear to a 4.10 and my 60 fts stayed the same. I went 10.40 with a 5.9 Magnum block, 30 over , 590 lift cam, 11 1/2 to 1 compression , W2 heads, Victor W2 intake, 750HP carb, 1 7/8 headers 549 hp. 450 tq. on dyno. I am redoing it now for lower compression/ pump gas expecting between 500-520 hp. Will be a backup motor still expecting high 10s. Both combos ran thru mufflers and with a 904 and 4900 Stall Ultimate prepped 8 inch converter , car is throttle stopped down to run 11.50s.

The car picked up 5 tenths and 11 mph from the converter swap.

You should read about the motor my engine builder won a competition with. Stock stroke, 11.66 compression 360. Made 773. Then 737 with mufflers on a 90 degree day at the competition to win it.
Yep, heads matter.

From a recent thread:



At the performance level of the car in that post, that 11mph represents about 150hp on the Moroso Chart.

I wonder how much extra hp the motor made with the new converter.

You think it seems reasonable that a 416 with TF heads, roller cam, nice headers, good intake, nice carb would make the same power(550-ish)as a 412” Pontiac with stock heads, intake, carb, and a .420” cam?

Interestingly....... you don’t seem to have any problem with the vailidity of these dyno numbers....... yet I don’t think that motor has been on the track yet:

I’ve dynoed piles of motors that went into cars that go to the track.

I know first hand that some people have cars that just don’t work very well, for whatever reason.
That doesn’t mean the dyno is lying.
The motors that I’ve tested that run right on the number, and the ones that have beat the Moroso Chart........ and the ones that don’t even come close........ are all being tested on the same dyno.

There are waaaay less variables to contend with in the dyno room, vs the endless myriad of variables between different cars, tracks, weather...... not to mention the owners/drivers skill in maintaining, tuning, and driving the car...... then throw into the mix whether or not the overall “combo” is well matched.

Be curious to see that motor go down the track. Sounds extremely optimistic to me, especially based on other trick flow stuff that has went down the track i know about. Thats pretty much saying it would make 630-640 with compression.
That’s healthy W5 type power.

Track times don't mean much, especially for street cars or novice bracket racers. Lots of street cars have 10 second power but 12 second tires. I don't have any trouble accepting that TF heads on a 400 inch SB Mopar can make 600 hp. Just because nobody at your track runs 9's with a TF headed SB doesn't mean it isn't possible.

The 700 hp LS7 with a small cam is a different animal. That number isn't what I'd expect from that cam.

https://www.youtube.com/watch?v=fsU...yF_12F8zjYDv-M2_2_dltlZzLuIaBHwXuLS_2yJI

this is just a 360 with TF190's and 286R@10.5:1 if you haven't seen this before.........

https://www.youtube.com/watch?v=fsU...yF_12F8zjYDv-M2_2_dltlZzLuIaBHwXuLS_2yJI

this is just a 360 with TF190's and 286R@10.5:1 if you haven't seen this before.........

And i cant remember( if ever) hearing of a 600+ horsepower pump gas Eddie motor. But.... i dont race dyno’s either

We also use a 1025 4150 carb instead of the dominator, which drives much better for street/strip car.

lol

Nice!
What compression and what camshaft?
Has it been in a car?