FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
In Other News . . .
You will notice a few enchancements to the forums to make your experience better. These include: Email Notifications, Thread Previews, Thread Starter Notation, and Emoji Options on the 'Like' icon. . .
Additionally, the merchant portions of the website have been updated and are now operational. . . . Check out iBoats for all your boating gear.
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...
