Dyno sheet for my 402 with overdriven 122
08-18-2008, 05:33 PM
#1
Dyno sheet for my 402 with overdriven 122 Several have inquired as to the numbers that my car is producing, another board member has helped me with generating the dyno sheet from a file that was provided to me.
UPDATE 08/20 There have been many expressing concerns about the info in the dyno sheet, and the proper function of this setup and tune. I am attaching a copy of the data log. Feel free to review, and help suggest ways to getting this corrected. I am also looking at changing to a slightly longer MSD wire, the thought is that maybe the current ones are too short for the taller ETP 225 heads, and may be causing some of the trouble. Others have suggested that the cam could be installed wrong, or a fuel issue, or spark plug issue. I have been in contact with Ed about designing a new cam. Also looking at changing to a Meziere pump, longer plug wires, and taking it to Nick's for retuning.
UPDATE 08/20 There have been many expressing concerns about the info in the dyno sheet, and the proper function of this setup and tune. I am attaching a copy of the data log. Feel free to review, and help suggest ways to getting this corrected. I am also looking at changing to a slightly longer MSD wire, the thought is that maybe the current ones are too short for the taller ETP 225 heads, and may be causing some of the trouble. Others have suggested that the cam could be installed wrong, or a fuel issue, or spark plug issue. I have been in contact with Ed about designing a new cam. Also looking at changing to a Meziere pump, longer plug wires, and taking it to Nick's for retuning.
Last edited by tom's2005gto; 08-20-2008 at 01:54 PM.
08-20-2008, 12:25 PM
#5
hmmm....... your air fuel is dangerously lean in the midrange i would have that thing at least at 11.5 a/f, you may want to take a look at that. that blower is way overdriven by looking at that graph, and by increasing the airflow into the motor (ie. heads cam changes) you are only going to make things worse. just my 2 cents take it as you like.
08-20-2008, 01:48 PM
#6
hmmm....... your air fuel is dangerously lean in the midrange i would have that thing at least at 11.5 a/f, you may want to take a look at that. that blower is way overdriven by looking at that graph, and by increasing the airflow into the motor (ie. heads cam changes) you are only going to make things worse. just my 2 cents take it as you like.
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08-31-2008, 07:44 PM
#13
I'll be sure to address the pulley thought!
Thanks, Tom
09-30-2008, 01:40 PM
#19
Well, I think I found another reason why the dyno sheet was crazy. I decided to upgrade the Comp Cam I had, to an Ed designed cam. Last Sunday, removed the comp cam and installed the new Ed cam. Car runs so much better!
Got home and compared the Comp cam to the cam card..... no match! Found out some how some way, my comp cam was replaced with a stock LS2 cam. Yep... I pulled a stock LS2 cam out of my engine. Not the cam I had once purchased and had installed before my very eyes. But apparently some how it was replaced by someone during the recent build up.
Note car has also been re-tuned with the help of Nick Williams having me data log and send him files, while he adjust and emails new tune files for me to upload. Heading to his shop in a few weeks for a dyno tune.
Got home and compared the Comp cam to the cam card..... no match! Found out some how some way, my comp cam was replaced with a stock LS2 cam. Yep... I pulled a stock LS2 cam out of my engine. Not the cam I had once purchased and had installed before my very eyes. But apparently some how it was replaced by someone during the recent build up.
Note car has also been re-tuned with the help of Nick Williams having me data log and send him files, while he adjust and emails new tune files for me to upload. Heading to his shop in a few weeks for a dyno tune.
Last edited by tom's2005gto; 09-30-2008 at 02:12 PM.
09-30-2008, 01:59 PM
#20
The problems that I see, blower is being spun to fast, and the AFR is dangerous. I do not know why people keep trying to spin these maggies so fast when all they do is produce hot air. I have people coming in with these things spinning so fast that they should be rated in Btu's.