Can I check for the EGR passage from the exhaust side or can I view it from the top of the head (under the valve covers)? The heads and intake are currently bolted on so I can't view the intake ports. Thanks for the help.
Casting number 25509263 seems to point to the heads not being a stage one Buick motorsport head. I definitely don't see 6 head bolts per cylinder either. Looks like somebody got a raw deal... Are the 25509263 castings any better or worse than the 25518445 castings?
Thanks for the help guys :) My map is slightly more aggressive than one tune I recieved and slightly less agressive than another. So I should be close enough to keep head gaskets together :eek: Now if I could only get my old beemer's eprom figured out then I would be all set....ahh but that's...
burner_0352@yahoo.com
As for build info...it's not my car so I'll tell you everything I can remember about it.
Engine
-Standard block with all the tricks that are supposed to make it live at 600+hp. pistons, ARP, cometic, oiling modifications etc.
-8.5-1 Compression
-Bored .20-.30 over...
I'm currently working on a speed density tune for a 87 GN and so far I have had to start mostly from scratch. Although I have been making steady progress, starting from scratch sucks. I was wondering if anyone would be willing to share their completed tune with me so I could have a general idea...