M370 with High flow mods.

Motordyne · 07-27-2012, 02:27 PM

Quote:

Originally Posted by SS_Firehawk

...
Compared to my last run, I was able to get most of the torque back, but I'm missing a lot of power on the top end. After 5k rpm, I'm not making as much as I did with the stock manifold. This leads me to believe that the stock manifold is better than the M370 when full bolt on's are on the vehicle. Both the intakes and headers really opened up power after 6k rpm and the M370 is the limiting factor. For a near stock vehicle, I see no issues with the M370, but for my car, I did not see a bump in midrange power and I saw a dramatic loss up top when compared to the stock manifold. I'll be removing the M370 and replacing the stock manifold soon and I'll be back on the rollers to retune the vehicle with the old manifold....

When will you do the re-dyno?
I'm wondering if you have some other variable affecting your results. That loss of 100HP sounds really off. Too much to be even a bad install because the primary thing to a bad install is a air leak. And they affect idle exponentially more than WOT.

It's hard to imagine a air leak that would cause a loss of WOT 100HP without making it impossible for the engine to idle or even start up.

The sooner you can get the car back on the dyno with the stock manifold, the better. Just in case there is something else happening that isn't currently accounted for.

100HP is just too much to be a air leak alone.

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