Place your bets...having engine dyno'd in about 2 weeks.

[Anthony]

Originally Posted by blykins

mine should peak at 6300-6400. Somehow a rod slinging out at 5900 rpm seems like it would do just as much damage as one coming out at 6300. Shoot, he's not responsible for someone else's build....I say dial her up and if she comes apart, she comes apart.

If your engine peaks at 6400, then I'd take it up to at least 6800, maybe 7000 for a good peak curve. I'd think you'd want to shift at 6800-7000 to get max acceleration.

[Sizzler]

440 Hp 470 Tq

[blykins]

Hot Rod magazine built a 390 with out of the box Edelbrock heads, a Performer RPM, an Edelbrock hydraulic flat tappet cam, and an Edelbrock carb and made 450hp.....

My combo should do a lot better than that....I hope anyway.

[blykins]

Here's a 427FE build.

http://www.edelbrock.com/automotive/...11/bomber.html

That's 505hp with 427ci, out of the box heads (but with larger valves), a Performer RPM, and a (milder than mine) solid flat tappet cam.

[Anthony]

Originally Posted by blykins

We'll know November 3rd.

So Brent, did you dyno your engine?

What are the numbers ( torque and HP), before and after tuning ?

[blykins]

Hey Anthony, it made 533hp @ 6500 and 479lb-ft @ 5400.

The dyno videos are floating around here somewhere.

[blykins]

Tada.....

[Anthony]

I had found my cam specs.

I/E 242/248 0.670/0.677

idles well. On a previous engine (that blew up), I had a slightly wilder cam, I think 248/256 or something like that. I like this cam better, better low speed response and cruising rpm smoothness, without giving much on top end, that is up to 6500. In fact, as I'm presently rebuilding the "other" engine, actually, I'm having Eric rebuild it for me, I'm going to put this slightly milder cam in it. It's a stroked shleby block, 480 ci, with 10.5 CR, ported Edel 428 heads, single 4BBl, sidewinder intake, holley HP950. I'm curious how this engine will compare to my other engine, different displacement and heads, but otherwise similar. This engine will be dyno'd on the stand and also in the car.

[Anthony]

Originally Posted by blykins

it made 533hp @ 6500 and 479lb-ft @ 5400.

That is impressive. What also is interesting is the differences between my engine and yours, as they are very similar in design, except for the heads and intake. My engine had 10.5 CR, yours, 11.0, My displacement about 429 ci, yours about 428 , slightly different bore/stroke. Cam is about the same, yours a little wilder, but not by much. I'm running Dove aluminum Hi-Riser heads, original single four intake, with original 780 holley vacuum carb, as I was trying to emulate an "original" competition light weight engine that possibly could have ordered when the 427 cobra came out in 1965.

What surprises me is the torque curve differences between our engines. I can't find my chassis dyno sheets at the moment, but I know I got max rwtorque 488 @3800 rpm's, which should be about 610 at the flywheel and rwHp was 454@5900 rpms and still climbing, which is about 570 at the flywheel, when he stopped the test. Your max torque didn't occur until 5400 rpm's, with max power @ 6500 rpm's.

I don't think the cam difference had that much of an impact, nor the bore/stroke relationship. My guess is that heads / intake combination were the major factors impacting engine performance.

I had no idea how my combination of parts would work out until Eric dyno'd it. I figured it is what it is, with again really only trying to emulate an original competion 427 light weight engine.

Very interesting.