Not enough compression?
I agree.. That is why I put buddies numbers up. It surprised me when I saw his boost.
Im seeing the heads change, pick up a little power but still need to fix something else.
Exhaust?
Im seeing the heads change, pick up a little power but still need to fix something else.
Exhaust?
TECH Resident
Joined: Aug 2008
Posts: 910
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From: Dubai
what are the specs on the EPP blower cam, that will help you figure out what your dynamic compression ratio is, which is what you need to know if you're thinking of milling the heads.
Also, is the tune spot on? how many degrees of timing are you running and what dyno?
Also, is the tune spot on? how many degrees of timing are you running and what dyno?
Don't think its out of compressor but not sure. Im 1100 mi away from the car for work for another month but I'll get my brother to get a count of cogs on the pulleys. It was on a dynojet and tuned by Andy Wicks of Dynotune. EPP's Blower cam - 232/240 .595''/.608 115 Ill have him get a picture of the graphs as well. The car has 1 7/8 tsp headers with their true dual 3in exhaust.
I know the feeling- spend a fortune and get disappointed when its done. I used an ls2 block and had a ton of blow-by, possibly cylinder expansion from the aluminum? I never found a true answer but I also had around 8.x-9 compression and the car stopped making power at 18#s. Either way its probably the same problem you have. Try the head swap and try again.
At 18-19 psi you are at 32.7-33.7 psi absolute which means you will need a minimum of a 2.5 bar map sensor, but why not go with a 3 bar at that point and a 3 bar operating system and have some head room. Sounds like some crap to me, but then again I tend to plan a little over what I need...sorry rambling a bit, but sounds like you might be dealing with some BS.
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Verdad Gallardo Well I built whole car myself and it was intended to have the maf in it still but he could never get it run and drive halfway decent. So then he went to a 2 bar without the maf and its maxed out now. If I would have known the maf wouldn't have worked I wouldn't have spent the money on it and put the map in.
My brother spoke with Tony Mamo yesterday and he said I have the right head for the rest of my setup. He thinks there is a problem somewhere besides the compression and would like to see my graph as soon as my brother can get a pic of it for me.
Well I built whole car myself and it was intended to have the maf in it still but he could never get it run and drive halfway decent. So then he went to a 2 bar without the maf and its maxed out now. If I would have known the maf wouldn't have worked I wouldn't have spent the money on it and put the map in.
