GM 847 stock heads dyno was today
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Joined: Feb 2001
Posts: 3,068
From: Cincinnati, Ohio
GM 847 stock heads dyno was today
357 SAE HP, and 368tq at first hit, 345-350tq for rest of powerband. Gotta run to work, will post exact numbers and graph, maybe video if i can get it up tonight. Im EXCITED. 
Last edited by atljar; Oct 11, 2003 at 10:17 PM.
Thread Starter
Registered User
Joined: Feb 2001
Posts: 3,068
From: Cincinnati, Ohio
Thanks guys.
Here is the dyno graph
http://home.cinci.rr.com/atljar/atlj...Heads%20NA.jpg
Hopefully will have friends email me the video soon. This was also made through a 12 bolt which robs a little more HP than a 10bolt
Cam is 234/242 .575/.595 on 112 . Running k motion k-800 springs. Peak power was MUCH lower than what i expected it to be. I have been shifting at ~6600-6700. I think i can grab a few more mph out of it by shifting a little sooner.
First pull made most power, but it was somewhat lean. Gave it fuel, then some more fuel on 3rd pull. Car started getting a little warmer which i attribute some of the loss in hp/tq after tuning, but its a little rich now. Going to pull a tad of fuel and go back to the track and see what happens
I think 365 SAE rwhp is possible if i can get 1 more dyno session and a little more track time to mess with timing.
Here is the dyno graph
http://home.cinci.rr.com/atljar/atlj...Heads%20NA.jpg
Hopefully will have friends email me the video soon. This was also made through a 12 bolt which robs a little more HP than a 10bolt
Cam is 234/242 .575/.595 on 112 . Running k motion k-800 springs. Peak power was MUCH lower than what i expected it to be. I have been shifting at ~6600-6700. I think i can grab a few more mph out of it by shifting a little sooner.
First pull made most power, but it was somewhat lean. Gave it fuel, then some more fuel on 3rd pull. Car started getting a little warmer which i attribute some of the loss in hp/tq after tuning, but its a little rich now. Going to pull a tad of fuel and go back to the track and see what happens
I think 365 SAE rwhp is possible if i can get 1 more dyno session and a little more track time to mess with timing.
Last edited by atljar; Oct 11, 2003 at 10:20 PM.
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Joined: Nov 1998
Posts: 746
From: Columbia, SC, USA
It did peak earlier than I expected, but its pretty flat almost all the way to 6400. I would think you should stay where you are shifting at, or no less than 6500. Great numbers tho, especially with a 12 bolt! Do you know the raceweight of your car? Just trying to get some info for my calcs...I think I'm gonna go with that cam now...anyone want to buy a cc305?
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Joined: May 2000
Posts: 2,889
From: Peachtree City, GA
awsome numbers man 
i am going to the track tomorrow.
New mods: 12 bolt, Street Twin, 315 Nitto Drag Radials. Laptop with datamaster for loging the runs
Bad news is that the car is feeling littel slow to me, or i am just so used to the speed, or the car needs a tune up. Unfortunatly i didnt have any time to give the car a tune up before the track since i had tons of school work. So i am not hoping for much
Ill be posting the times tomorrow
Marcin
i am going to the track tomorrow.
New mods: 12 bolt, Street Twin, 315 Nitto Drag Radials. Laptop with datamaster for loging the runs
Bad news is that the car is feeling littel slow to me, or i am just so used to the speed, or the car needs a tune up. Unfortunatly i didnt have any time to give the car a tune up before the track since i had tons of school work. So i am not hoping for much
Ill be posting the times tomorrow
Marcin
Last edited by xxsaint69x; Oct 11, 2003 at 11:28 PM.
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Joined: Feb 2001
Posts: 3,068
From: Cincinnati, Ohio
Not sure on race weight, 3700-3800??? Nothing removed from it (spare, jack still even in car), lots of crap thrown in back seat, 12 bolt, 17s all around with 275/40s and me which = a lightweight 160ish.
Last edited by atljar; Oct 12, 2003 at 03:12 PM.
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Joined: Oct 2002
Posts: 6,518
Your TQ peak is not really 368 because the converter is flashing there, it looks like its more in the 340 range. If your cam was in a M6 then the TQ would be in the 340 range, so that's alot more realistic.
Either way that's a good HP number for a cam only setup.
Bret
Either way that's a good HP number for a cam only setup.
Bret