572 DFI Procharger Build
08-09-2010, 07:53 PM
#321
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08-09-2010, 07:57 PM
#322
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Smaller cam, smaller heads, less boost more power???
I cant imagine the M4 is using that much less power than my M5. I have the dyno set as it would be in the boat. everything is on it, pwr steeering, water pump, alt.
I really wonder if my headers are the restriction I have the E-tops. I might see if I can get a larger set for the dyno just to compare.
I cant imagine the M4 is using that much less power than my M5. I have the dyno set as it would be in the boat. everything is on it, pwr steeering, water pump, alt.
I really wonder if my headers are the restriction I have the E-tops. I might see if I can get a larger set for the dyno just to compare.
Alt, water, no pwr steering on this motor
08-09-2010, 08:01 PM
#323
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Randy
08-09-2010, 08:58 PM
#325
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Sorry ...Fridays pull 14.6 AFR .....would of spelled melt down .... though the knock meters didn't jump at all??
08-10-2010, 03:34 AM
#327
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08-10-2010, 06:56 PM
#328
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Update
Feels like I have been here before… the new pistons are more like a NA motor with the D shape dish to take advantage of good quench when not in boost, the old pistons were just a dish with a valve relief. Plus the skirts and tops are coated…
The head gaskets are custom made, Cometic does not stock a MLS for the Merlin block..
The new cam specs are slightly less duration, more lift 112 LC and 5 deg built in advance. The regrind is the new card.
I hope it’s dressed tomorrow and on the dyno Thursday, it will be interesting. I hope to have some more in the bottom end and mid, but not lose anything up top. We will see…
The head gaskets are custom made, Cometic does not stock a MLS for the Merlin block..
The new cam specs are slightly less duration, more lift 112 LC and 5 deg built in advance. The regrind is the new card.
I hope it’s dressed tomorrow and on the dyno Thursday, it will be interesting. I hope to have some more in the bottom end and mid, but not lose anything up top. We will see…
08-11-2010, 10:39 PM
#329
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Getting there, should be on the dyno by Friday, and in the boat sometime over the weekend. Water testing Monday.
Some pics of the damaged pistons. At least 4 were this bad. Interesting it was near the intake valve relief. It is a thin area. You can see it is out of round there, got really hot expanded scrubbed against the cyl wall and warped due to heat. I have a NTK O2 to test with accel said the standard O2 sensor can be of up to 1 AF under boost. I will see. I have not found any big tube headers to try yet.
Some pics of the damaged pistons. At least 4 were this bad. Interesting it was near the intake valve relief. It is a thin area. You can see it is out of round there, got really hot expanded scrubbed against the cyl wall and warped due to heat. I have a NTK O2 to test with accel said the standard O2 sensor can be of up to 1 AF under boost. I will see. I have not found any big tube headers to try yet.
