The iboats forum moderators are excited to announce that at this time it appears the iboats forums posting pictures function is working once again. Though we cannot promise for how long, we're hoping for indefinitely.
Reversion is indeed something to investigate since I do not know what exhaust system the engine has been running.
Thanks again (@all) for your responses, it is very helpful!
I run my engines always at 98 octane. Have access to 100 and 102 as well but don't think that would be necessary.
I might go for a milder cam (if there is a wild one mounted currently) to not generate to much heat for the cast iron heads (and I don't need any more then 425 max).
Thanks for that Scott, could you indicate why specifically in a marine application we have to be carefull with high compression ratios? We can get 98 fuel everywhere and 100 or 102 at places.
I understand what you say about forged/casted internals, I don't want to spend crazy money and looking...
Many thanks for your help guys, this is inline with what I thought. For the avoidance of doubt: This is not the "7.4 330" that is currently in my semi classic cobalt.
I want to build a new engine for it with forged internals. I think what I show in the pictures above could be a good starting...
Hi all, this is Maarten from Amsterdam. I own a Cobalt 223 7.4 330 Bravo1 an a lot of bbl parts. Can someone help me identifying the pistons, heads and injection system on the attached photos? The engine block casting number says Gen VI Vortec but has been modified by a previous owner.
Thanks...
