Nice write up. I am wondering if you adjusted your tunes with each swap??
I did for the FAST setup, because that was the descreeed 85mm maf (not the easiest to tune for sure, esp for low airspeed street driving) That took a little time street tune, but WOT for the pulls while it was on the dyno that night. Mike (@ Newera) did 1-2 pulls with a backup pull it was good.
But for the LS6/ported stock TB that was the tune Mike did for me I drove/raced on for last year, and this year till that night (basline). Then put the 85mm TB on, with the stock maff. (I never took the maff off the bellow/lid). And did 1-2 pulls quick, I have a 02 bung in my wideband and watched the AFR on a LM1. My old roomate Bpipe95 on here, and another friend helped me for the night, some others stoped by too. But it was fine, I forgot the numbers only maybe .2 difference. Just WOT only it was fine. But your should do a tune, for the larger TB moving more air at part throttle, or if you change maff for sure. Same for the BBK, with the 85mm TB, just put the stock bellow/maff and my lid on , and did the pulls. AFR was close. Mikthat tunes my car, wasn't right there on the dyno at the time (probably on the phone, and going Emails, it wasn't really late yet, lol.
I had alot of work to do changing all this stuff that night and getting my car off the dyno that night. There was a customer getting a tune in the AM and I had to work eaily also. I know all these things you'd like to do, but I basicly had a small window of time I could use a dyno. So now looking back I wish I did some other things. Like the BBK 85/85 would make more power with a descreend/ported stock maff, Or a 85 or larger maff. You can get a 85mm truck maff CHEAP! I got mine for like $30 shipped, so that would the way to go, USE the larger TB and intake. Thats cheap and might be another 3-5 whp witch is twice the gain over a LS6 intake on my car. If you have a LS1 intake that would be the way to go.
Quote:
Originally Posted by Cumbias
Can the BBK be polished? Anybody try to?
BBK used to but they don't anymore, It was a nice job too. You could always polish it yourself. Just just the top ribs, that would be really easy. And paint the rest some other guys I saw did that and it looked really nice.;l
BBK used to but they don't anymore, It was a nice job too. You could always polish it yourself. Just just the top ribs, that would be really easy. And paint the rest some other guys I saw did that and it looked really nice.;l
Oh, not the outside, I meant the runners inside. A port and polish to smooth out the imperfections and get all the casting residues out.
__________________ R.I.P: 2000 Trans Am, M6, stock except for a flowmaster exhaust(came with the car).
how would that work? think of whats going on, this is a diffreance of polished to a normal sand roll or even just carbide porting finish. Even a good modern cast finish isn;t that bad.
Surface finish is a very small percent of restriction. Its the shape the size that matters.
There should be no questioning after reading this. I have no questions and I now know, what I need to know. Thank you for your time to help others out! This is very good information on how you can spend a lot to gain almost nothing.
