So i had the turbo ls and just got this vtec head on it and tryin to do a little tuning on the boost+vtec portion. Is this enought timing advance? It pulls relly strong in 1st and second but when i hit third in the top end it seems to die off and not pull as hard. Ive also got the PLX-M300 WB and its always at around 11.3-11.8. IM shifting at 7500. And there are no boost leaks or anything like that. Boost hits a solid 10psi.

Oh, and its an LS/VTEC. t3/t4 57trim. Open 2.5" DP

 

You may want to check your cam timing again, otherwise it could be gear-based ignition correction in crome (I can't recall if it has it, I can't quite find it). The map looks to not be aggressive, so phantom detonation isn't likely. If you really want to know, I'd suggest taking it to a dyno and test gears 2-4; *** dynos are the most finikey and unreliable of all automotive instruments.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">; *** dynos are the most finikey and unreliable of all automotive instruments.</TD></TR></TABLE>lol

 

timing up top looks good. i have noticed about crome that it doesnt pull much timing around max tq, so im sure pulling a degree around 5000-6000 wouldnt hurt

 

you are looking pretty conservative on the timing, but like the others said, hit the dyno and get it tuned.

 

Anyone else?

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackeg &raquo;</TD></TR><TR><TD CLASS="quote">timing up top looks good. i have noticed about crome that it doesnt pull much timing around max tq, so im sure pulling a degree around 5000-6000 wouldnt hurt</TD></TR></TABLE>

I agree, I have always pulled timing in this area. It is actually amazing to see how much you can oull on a dyno before you start to loose any power in that range.