just wondering. looking at putting together a n/a D16 for my daily driver, and i've got a complete rotating assembly from a D16A1 with P29 pistons. obviously, head and head gasket choice will make a lot of difference in what fuel i could run, so i wonder how high i can run the compression before i have to go to premium fuel.

 

I'd take it no more than 10:1 USDM b16's and GSR's say to run premium fuel, and I'm not sure of the GSR's compression, but the b16's run 10.4:1. Maybe 10.5:1 with a good tune.

 

I believe the GSR's come 10.6:1 but not positive. And you should always run 93 if you car about your vehicle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SlammedDC2 &raquo;</TD></TR><TR><TD CLASS="quote">I believe the GSR's come 10.6:1 but not positive. And you should always run 93 if you car about your vehicle.</TD></TR></TABLE>

usdm gsr = 10.1:1
jdm gsr = 10.6:1

 

Why are you guys talking about B-series when he asked about a D-series?

I don't think you'll get away with regular gas with P29s

http://www.c-speedracing.com/h...c.php

 

i ran 10.8:1 static on 87 and it wouldnt knock. that was a sohc with PG6B pistons

 

p29s will break ringlands if you're not running 93 octane ...at least on a z6, and ESP on a y8 head. D16A I think will be okay on 91/89. But 87 is out of the question, sorry.

Nathan

 

well, with P29s and a Z6 head, i can get comp ratios between 10.39:1 and 12.43:1, depending on what headgasket i use. i even know of a company that will make a 0.113" headgasket - that'd get comp below 10:1, but that's also an insanely thick headgasket.

so i guess, based on lohatch's post, i'd probably be fine with the 10.39:1 ratio...

anybody else?