Right so typically The higher the HP the more loss ur going to see, and alots got to do w the converter slip % and whats its set up for correct?

 

Your dyno #ers certainly wont do that motor justice through that drivetrain. I would guess 660 minimum at the flywheel NA. Thats a pretty good size cam for LS7 heads with that intake. The intake will be your restriction for peak horsepower.

 

Post it here https://ls1tech.com/forums/dyno-gues...ing-forum-150/

 

Moved...

 

Also from what I've seen that cam is all wrong for LS7's.[/QUOTE]

Really?? Interesting.......

 

Also if you have a loose converter that flashes to a pretty substantial rpm off the hit, most dyno's have a hard time being able to keep up with the torque curve/output and the numbers will be skewed.

Pat G does know his stuff, I just think your heads would do better with more exhaust split on a wider lsa.

 

Really?? Interesting.......[/QUOTE]

Whats your imput on this? Sounds like u may have ran a LS7 heads n cam before

 

Whats your imput on this? Sounds like u may have ran a LS7 heads n cam before[/QUOTE]

Me? Naw, only thing i can say is that cam looks pretty darn good to me

 

Ya Iv herd of big cam spec in LS7 and LS3 headed build and ppl saying how it ran like crap down low so they swapped out cam for a smaller one and it rans just as good but pulled harded down low.....but this may have only been a issue w the newer style PCM and not our 4th gen style

 

I worked with 7 different cams on the engine dyno and in my car so trust me, more then one of those was bigger then that and idled like a kitten at 900 rpm's. How does 646 lbs of torque at 5250 rpms sound to you!? It's all in the combo...

 

lol feel free to pm me those cam specs

 

Hahahahahahaha!!!

 

My 402ci is 545hp and near 132mph in a 3,700lbs car. A 427ci proper built could see 570-580hp set up right.

 

I thought your car was M6 ?

 

Here's a little help...
GMPP LSX block 427ci
Callies 4 inch stroke crank
Howards 1000hp billet rods
Wiesco -2.8 cc pistons
deck height -.003
.036 comedic gasket
Heads are PI/MAST 6bolt angle milled by WCCH to 58cc's (and now 11 degree angle) = 13.6 to 1 compression
Crower Shaft rockers
Cam is a 243/255 113+4 660/670 lift (found out quick that bigger cams don't work that well with a FAST manifold on these combos).
FAST ported and raised to fit the heads by LS2 PORTWORKS
Nick Williams 102mm t-body
ARH 1 7/8 headers, Dual/Dual cat back, 4inch race ready cut out after the cats...
Strange 12 bolt 3.73 gear ratio.
4L80E
Circle D 4C converter... Flash rpm 5400 on the dyno

It made SAE 584, STD 601 (locked). Unlocked SAE 530, 547 STD. I will have to wait to see what the extension is on the track to find if I need to restall. With a little break in time, NO cats and a 4L60E, I might have seen 560 unlocked. So you can see how hard it is to make 580 unlocked with a Fast manifolded combo "with a loose converter"(...54hp is getting up there). I do have video on you tube but I can't get on it for the link from work. If you want to see a few pulls search "Nohorsepower" on youtube...