Dyno today Results
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Dyno today Results Video
Today was a good day for me. The dyno was new and the shop was immaculate. Great bunch of guys there also. We spent 5 hours there between the two cars. I was first up. They did the "driving" so I just watched and ran the LM1 and my son did the video. First run was 389 RWHP and 376 RWTQ. I'm thrilled with this and know there is a little more. The AF is good but could be better. The best run I had was 409 RWHP and 396 RWTQ. I had hoped to break into the 400s so I was thrilled. It is very interesting hearing your own car run from the outside. They did run it up in 4th gear. I made 5 runs and tried some different timing and jets. The best came at 36 total, and 78/86 jets in the 825 Mighty Demon. I did hear it break up a little at the upper rpm limit so I'm looking into that now. It made great HP and I was extremly satisfied. The LM1 was dead nuts on to the AF gauge they had. They liked the LM1 and were considering getting one.
My only problem was on the hour long drive my stupid tach needle broke off. The long stem broke right at center piece. All winter to fix that.
Hopefully here is the video if I did it right. Looks like it is working. If you look to the right that is me with the laptop reading the LM1 gauge.
http://smg.photobucket.com/albums/v3...ynoday1003.flv
My only problem was on the hour long drive my stupid tach needle broke off. The long stem broke right at center piece. All winter to fix that.
Hopefully here is the video if I did it right. Looks like it is working. If you look to the right that is me with the laptop reading the LM1 gauge.
http://smg.photobucket.com/albums/v3...ynoday1003.flv
Last edited by Gordonm; Dec 28, 2006 at 06:06 PM.
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
HOLY SMOKES!!! Those are pretty impressive numbers. I wish mine would be somewhere near there. I wonder what the parasitic losses would be with the Keisler 5 speed are? If it is 15% that puts you up to around 460 HP flywheel. Very nice numbers. Maybe 15% is conservative I do not know, just guessing.
I need to get my LM1 hooked up and running. I am sure mine is so far off it is not funny. The LM1 did its job for you, proven on the dyno. Hopefully I will be able to get a small improvement in mine also.
I need to get my LM1 hooked up and running. I am sure mine is so far off it is not funny. The LM1 did its job for you, proven on the dyno. Hopefully I will be able to get a small improvement in mine also.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Dyno operator said the stick cars lose 18 to 20% drive train loss the automatics are around 25%. Don't know if these are right but I have always heard 18 to 20% myself.
Burning Brakes
Joined: Jul 1999
Posts: 923
Likes: 164
From: Hudson NH
Congratulations! How high did you spin it? What rpm did you make peak power? If they haven't already done so, ask the shop to e-mail you the run files. You can download WinPep software and manipulate the graphs. Short of that, post a pic of the graph!
Any ideas on why it broke up at speed?
Mark
Any ideas on why it broke up at speed?
Mark
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Congratulations! How high did you spin it? What rpm did you make peak power? If they haven't already done so, ask the shop to e-mail you the run files. You can download WinPep software and manipulate the graphs. Short of that, post a pic of the graph!
Any ideas on why it broke up at speed?
Mark
Any ideas on why it broke up at speed?
Mark
As far as breaking up, I think it is ignition. I have a Crane HI6 box that is triggered by a set of HD ponts. They are kind of old and I don't know how HD they are anymore. I might step up to a different dizzy this winter, or just get another set of HD points. Valve springs are brand new and it sounded like it was just starting to miss slightly. My rev limiter is set at 7100 rpm so I know it was not that.
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Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Its in my signature.
Just loaded the video. Pretty cool sounding. Not much to look at just the rear half of the car with the wheels spinning. It is taken with a camera on video mode so it is not great but not bad either. I'll figure out how to post it sometime.
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Upload the video to Photobucket. I have done that a few times. Its not the bet, but it works. I am sure there are others that can be recommneded but that is the only one I have any experience with.
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Gordon's 72 posted some great numbers, mine didn't fair so well as his but the THD400 auto trans really eats up the HP, they said around 23-25% and the operator sees this all the time so I'll go on what he said. I ran Gordon's old 350 block, stock TRW pistons, around 9-9.5 compression, 750 speed demon, 76/84 jetting, (the jets were off from BG "what a surprise" and way too tight to remove) we ended up changing the jets to 78/89 and got close to 300hp with 328TQ....alittle disapointing but with differant pistons we can bring up the compression and post some better numbers, but the THD 400 is a killer....you learn soo much from a dyno, you get the real numbers and not over stated ones we hear about....Anyway one of the best times we've had, 5 hours of dyno time, does it get any better?
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
HOLY SMOKES!!! Those are pretty impressive numbers. I wish mine would be somewhere near there. I wonder what the parasitic losses would be with the Keisler 5 speed are? If it is 15% that puts you up to around 460 HP flywheel. Very nice numbers. Maybe 15% is conservative I do not know, just guessing.
I need to get my LM1 hooked up and running. I am sure mine is so far off it is not funny. The LM1 did its job for you, proven on the dyno. Hopefully I will be able to get a small improvement in mine also.
I need to get my LM1 hooked up and running. I am sure mine is so far off it is not funny. The LM1 did its job for you, proven on the dyno. Hopefully I will be able to get a small improvement in mine also.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Based on MANY dyno run results that I have seen for C3's, you are looking at 19 - 25% loss for stick shift and 25% - 35% loss for automatic (Powerglide has least loss and TH400 has highest loss).
Those numbers break down into 12 - 15% drivetrain loss (for stick cars) plus 7 - 13+% accessory loss.
For automatic cars, the drivetrain loss is between 18 and 25% + 7 to 13+% drivetrain loss. High stall converters can add another few % of drivetrain loss..
Restrictive exhaust can add to the accessory loss a lot more.. I have seen engines that dynoed at 450 HP on the engine dyno (no accessories and race exhaust) only output 280 RWHP (on a car with stock, non performance exhaust)
It all depends on how engine dyno results are achieved. For production cars, engines are dynoed with all accessories attached as also full exhaust. Crate engines are dyoned with race exhaust and no accessories.. Therefore, on late model cars, drivetrain loss is only 12 - 18% as accessory loss are already considered in the engine dyno rating.
Last edited by GrandSportC3; Dec 28, 2006 at 07:12 PM.
Le Mans Master
Joined: Oct 2005
Posts: 6,247
Likes: 471
From: Glen Allen, VA
Well, you've beat a C5 Z06. I watched one lay down a 358 rwhp run at Carlisle a few years ago. Not bad at all. I love your car BTW. My brother lived in Marlton for a couple of years while working for Lockheed in Cherry Hill.
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Thread Starter
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
