Dyno today finally, a little disappointed.

Video of the last run:
http://www.youtube.com/watch?v=3-_BtbUgYgs

I'm wondering if I should replace my MAF. In my pre-install research one guy over seas was low on power after his install and they replaced the MAF and made 30-40 more hp. I'm still wondering also about whether or not my tune is actually 100% stock since I had the little issue with the speed limiter being set at 105mph for some unknown reason.
Last edited by 91RS; Dec 5, 2011 at 09:20 PM.




And I'm a little confused, you install a major power adder yet don't get a tune? What magic (or lack of knowledge on my part?) does the ECU do to be able to adapt?
And after your mph debacle, I bet there's probably a few more things in your ECU that aren't stock....

I was confused too, but Brandon told me I would be wasting my money if I had it tuned. He said I could run more aggressive timing if I remove my primary cats or get high flows. It uses a secondary fuel pump with a pressure regulator to get the extra fuel under boost.
Yeah, I agree. Unless Brandon has any different ideas, I think my next step will be a new MAF and find some time to get up to ACC and have them reprogram the ECM and TCM.
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Whether the gains should/could have been higher with a supercharger alone is the question here.
Maybe the conditions at the dyno were not ideal. It has been fairly cool around here so I dont think heat could have been too much of a problem.
Cheers _PTEngineering
Here was one of my pulls (was running rich on that pull and got 400rwhp) but corrected the tune to maintain 11.6-12.0 through the range and got it up to low 440's
http://www.youtube.com/watch?v=3ZkgD64UoME
Did they offer to test your air-fuel?
Whether the gains should/could have been higher with a supercharger alone is the question here.
Stock C55s are only pulling on your same dyno 270-290 (I've never seen a stock on on same dyno over 300) , so you did gain some major HP. Your #s are the same as mine and several others.
The MAF is prolly not the issue. I think you're wasting $200.00 bucks to just replace it. Been there done that!!
Last edited by Newzchspy; Dec 6, 2011 at 05:42 PM.






My main reason for the dyno was to make sure my A/F ratio was correct, but they said I needed a bung in the exhaust to check the A/F ratio and I don't have one yet. Is there another way to check it?
I really wanted to get in on the group buy for MBH long tubes, but I just really didn't need to spend any more money.
The car does feel faster for sure, but it definately doesn't feel like the 400 whp I was expecting. I really wish I could have gotten a before dyno, but it is what it is.
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As you all know I been working on My engine for quite some time. I've had a few stops along the way , But I wanted it to do some things my way. Here is the latest Dyno sheet , I always use the same dyno ( DYNOJET 248 H ) & The same operator. This was a new Kleemann blower kit with the MP-112 Gen 4 Eaton type blower . The pull was done in 4 gear , then we hit the speed limiter at 6400 rpm. It was pulling very good til then.and I believe the HP will keep increasing to 7000. rpm and beyond. The Torque curve is right & Fuel air ratio is on the money 11.83 for safe operation . Since this post I made over on the W-209 site , I had Andy @ MHP fix the shift points & rpm limiter issues & he found me some extra Ponys under the Curve , along with some at 6750 rpms. The stock File should find you in the 400 RWHP range with a good exhaust. Enjoy ___PTEngineering Attached Thumbnails
Last edited by PTE; Dec 7, 2011 at 03:57 PM.
Video of the last run:
http://www.youtube.com/watch?v=3-_BtbUgYgs







