Mike Norris

iTrader: (10)

Hey All,

We just finished up a 2002 Z06 with 1510 205 AFR's, 226/230 XER on a 114, Halltech Stinger, LG longtubes w/ OR "X", Borla Stingers, 10% underdrive pulley, stock throttle body, stock LS6 intake, stock MAF and on our "conservative", according to some, dyno. She is known to a lot of folks as the humbler. Maybe 1-2 percent lower than others.

She put down 440RWHP and 402RWT on a 12.8-1 A/F ratio and 27* timing on top. Before everyone jumps in and says "thats low compared to Tony's car", consider that he has a ported 90mm FAST intake, 90mm TB, electric water pump, 25% underdirve pulley and full roller rockers (to be seen if they actually help HP). He also can run his car with more timing at a leaner A/F ratio. Every car is different in that respect.

All in all, a nice combination that idles and drives very nice, and for what the exhaust is, not too loud. Even for me Just wanted to let folks know more info on the AFR's. We have quite a few more coming in for different combo's and will keep everyone up on things as we go along.

Mike Norris

SPANKY LS1

iTrader: (24)

Were the heads milled any? What was the head gasket thickness? Were the pistons flycut? Good numbers, Shawn

pdd

iTrader: (3)

nice

00SS4780

iTrader: (3)

#'s look good. Can you post a graph of it? I would love to see how it pulls all the way up.

mikey

iTrader: (6)

Good job Mike. We have an F-body getting the same heads and one of our Dominator cams. Should be interesting.

10secondZ

iTrader: (24)

Nice!The quality of the AFR's are impressive.Very nice heads, and 440 rwhp is great with a stock ls6 and tb!

Carter

gomer

iTrader: (13)

I'm wanting to know the same, that would be some good info. Also, what was the ICL of the cam and do you have a graph you can post?

Mike Norris

iTrader: (10)

Hey All,

Thanks for the kind words and I'll try to answer the questions for you.

As far as posting a graph, haven't made it that far in my lack of PC knowledge, but I will give a decent idea on what it looks like. It was SAE corrected with a correction factor of .97. Actual numbers were 453RWHP and 414RWT. It peaked tirque at 4900 and had 375RWT from 3800-6400. The HP peak is at 6400, but is very flat from 6300-6700, and made 400RWHP at 5300.

The heads had 60cc chambers and a stock GM MLS head gasket. Cam was in at a 113 ICL and no flycut.

Hope this helps and talk to y'all soon.

Mike Norris

00SS4780

iTrader: (3)

Thanks, that works for me.

Viper

iTrader: (6)

60cc heads, they come at 66cc. So that's like 11.4:1 CR or so?

SAM98WS6

10.6-7 on a 2002 Z06 I believe

Mike Norris

iTrader: (10)

There are a lot of different calculators to use. Mine uses 10 parameters and seems to be the most comprehensive. Of course opinions will vary on this. With that said heres what I inputed and came up with.

Bore: 3.898 (inches)
Stroke: 3.622 (inches)
Rod Length:6.098 (inches)
Cyl. Head Vol: 60 (cc)
Deck Height: -.007 (inches)
Head Gasket Bore: 3.970 (inches)
Head Gasket Thickness: 0.054 (inches)
Piston to Cyl. Wall Clearance: 0.003 (inches)
Top Ring Land Height: 0.2 (inches)
Piston Dome Vol: 0 (cc)

Compression Ratio: 10.978 : 1

Hope this helps.

Mike Norris

Tony Mamo @ AFR

iTrader: (13)

Hey Guys...

Mike and I had a brief conversation about this job before the head install and we were both hoping for around 440RWHP with this somewhat conservative package. Considering the parts that could still be bolted on and the gains they would provide....these results are right in line with a "mild" package capable of producing mid/high 400's in "daily driver" trim. Also, the fact that NLP's dyno is known to be a little "stingy", it's all the better.

By the way, I did the math on CR and I got exactly 10.9 to 1 (ASSUMING...you know how that goes...a piston up .005 out of the hole).
While on that subject I think a 62 cc head and a thinner .040 gasket might have provided slightly better results (with almost identical compression) due to the tighter quench....Hey Mike...are you up for an experiment?? I'm sure Jeff won't mind at all!!....LOL

Regards to all,
Tony M.

Mike Norris

iTrader: (10)

Hey Tony,

Nice of you to chime in. Yeah, I thought about the tighter quench also. I usually figure at .007 out of the hole for the piston as an eductaed guess. We are up for whatever you have BJ Talk to you soon.

Mike Norris

DavidNJ

Tony,

Are you saying to go with the smallest head gasket, and mill the head to match?

David

Mike Norris

iTrader: (10)

I think what Tony is getting at is that an optimal quench area is in the .035"-.040" area and work your way from there. Some will say that for every .010" added to the quench area over .035" is worth 5HP or so, compression still being equal. Maybe Tony will elaborate.

Mike Norris

next

iTrader: (9)

Mike,

If you want to post up the dyno sheet, you can email it or fax it to me and I'll add it to one of your posts.

Eric

DavidNJ

The hypothesis is then that you used .007 out of the hole with a .054 gasket for a .047 quench area, and using a .040 gasket with a piston .005 out of the hole (mill the piston?) for a .035 quench area would add maybe 10hp?

Is that right?

David

Tony Mamo @ AFR

iTrader: (13)

David...

There is no "set" power figure you will gain with "X" amount of tighter quench. One motor might respond different than the next. The bottom line is that the "tightest" quench you can run without driving the piston into the deck of the head under running conditions will usually yield the best power results given the same CR. Tighter quench "tolerances" help to reduce detonation, provide an extremely efficient "burn", and helps completely "atomize" any fuel droplets left...also, there is no "dead space" which would waste some of the energy available from combustion. Some of the best running motors I've seen come in for a freshen up (back east when I was working @ SSRE) were scraping the carbon off the tops off the piston on the quench pad side and slightly "kissing" the deck of the head...thats when you know you have it "just right"....LOL

Regards,
Tony

Got Me SOM

iTrader: (2)

good job mike makes almost as much power as me and i'm blown.