I went to a local dyno day earlier today. Here are the numbers.
1994 M6 Z28
LE Heads, 2.02/1.60 valves, Combo 612 Springs
227/233 XE camshaft, 1.6 Pro Mags
Jet Hot LT's, True Duals
Moroso CAI
Moser 12 Bolt, 4.56 gears
Stock Bottom End

Motor Pull:
347hp, 328tq. The numbers are down from my earlier pull of 351hp/347tq, but I attribute the loss to the dual exhaust which changed my AF ratio to 11.9 on today's pull.

Nitrous Pull: 175hp Nitrous Works Plate
497hp, 510tq
The AF ratio was a nice 12.9 all the way through the pull.

All dyno numbers are SAE corrected.

 

Nice, Im guessing the reason your N/a numbers are kindof low is because the cam is for nitrous?

 

nice.

 

It's a NA camshaft. It is the 227/233, 560/569 XE from Combo Motorsports. The NA numbers are kinda low, but I think I could have squeezed around 360rwph out of it if it were leaned out to around 13.1 instead of the 11.9 that we ran at today. Also, I don't have an electric water pump, crank pulley or any of the little stuff that makes those last few ponies. I figure if everything was tuned for a NA pull it would top out around 360/345. However, I always run nitrous at the track so we have it set up for nitrous.

 

Have you ever run this beast NA and on the jug?

 

did lloyd fully port those heads?

 

Lloyd did these heads back before he had any set "stages" or cam packages so I can't really say. The flow numbers look like his full port stuff though. I haven't had a chance to run the setup yet, but the tracks around here are starting to open back up so it shouldn't be long.

 

Id expect at least 380 NA with that combo of parts. How much hp does a 12 bolt normaly eat up?

 

What rpm did you have peak hp and torque?

 

Yeah, that is what I would have liked to see, but the most the car has made with the 12 bolt is 356hp/347tq which was on a different day and before the dual exhaust setup was installed. This combo is probably good for around 365hp is everything is just right. I don't see it making 380hp for me though. I think the "real world" track numbers will be nice though, especially with the nitrous.
EDIT: The 12 bolt will eat up around 10-15 hp in most instances.

 

Also, the peak hp looks to be just before 5500 rpm and we spun it up to around 6500 rpm.