Dyno results: MS4 & PRC Stg. 2.5 5.3l 59cc heads [Archive]

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Kevin Doe

March 6th, 2009, 07:05 PM

My combo:

93 RX-7 (FD)
2004 GTO LS1
MS4 cam, and PRC dual spring kit
LS7 lifters
PRC Stg. 2.5 5.3l CNC ported heads. Milled down to 59cc chambers
60 lb/hr injectors
LS6 manifold
Shaner S3 ported and filled stock TB
Dual 3.5" ramhorn style intake system.
1 7/8" long tube ceramic coated headers
True dual 3" with X-pipe, and no cats.
3.55 gears

The dyno was done on dynapacks, in 4th gear.

Peak numbers:
487 hp
435 ft-lbs

http://i93.photobucket.com/albums/l55/Kevin_Doe/RX-7/Dyno_3-6-09.jpg

I also included the tune file for those that are interested.

mr.prick

March 6th, 2009, 07:10 PM

:thumb_yello:

Blacky

March 6th, 2009, 09:17 PM

Wish I could find the time to get to a dyno and play with my ride for a while :)
Paul

joecar

March 7th, 2009, 01:18 PM

Nice work Kevin...:cheers:

If do you drive on the street, be sure to get the low rpm high map AFR/PE richer.

Kevin Doe

March 7th, 2009, 03:10 PM

Joe, what makes you say that? I developed the fueling curves/maps based upon what fuel made the most torque at that point.

joecar

March 8th, 2009, 10:39 AM

Kevin Doe

March 8th, 2009, 12:25 PM

Kevin,

I'm assuming VE table is correct for the top right corner of B3647... see my comment in the attached image (include the next few rpm rows also)...

I am not saying you did it wrong... I am saying "what if this condition occurs"...:)

Cheers
Joe
:cheers:

I don't really think its a concern. 13.5 AFR should be fine I would think. But then again, I'd never floor it at 1000 rpms anyhow. All the dyno pulls I did were 2000-7000 rpms. At 2000 rpms WOT the AFR was good. I was never more than 1% off on my BENs by the end of dyno tuning.

joecar

March 8th, 2009, 07:22 PM

That's fine... I was just thinking of if that condition ever did happen, and I see that it wouldn't...:)