Quote:
Originally Posted by geezer#99
THe only difference Jocko is the 260 hp one is because of a 4bbl (holley or eddy) and headers and likely intake.. THey assume you'll outfit the 195 hp one with a stock intake, carb (quadrajet or 2gc) and single exhaust.
http://www.jegs.com/p/Chevrolet-Perf...67244/10002/-1
At least that crate has a cam that's matched closer to it's compression ratio.
The 290 hp engine has a mismatched cam with it's low compression. Look at this chart to see a relationship between cams and compression ratios.
http://www.crankshaftcoalition.com/w..._compatibility |
Thx Geezer, so the engines being sold are identical, just advertised differently based on what the buyer adds on - thanks, appreciate the info. Yeah, the compression ratio/cam combo on the 290 horse motor baffles me. I think the 195/260 with a cam improvement may be the way to go (for me) I’d rather change the cam than pistons, ha.
Anyone have any additional info on the internal/external balanced 1 piece rear seal approach? There are a lot of 383 crates floating around ought there so it can’t be that big of an issue - I just haven’t looked into it much yet. I guess I’m only used to internally balanced engines, even though GM has had fully external balanced engines around for decades. I’m guessing it’s just not really a big deal. And if that’s the case then maybe a 383 in sheep’s clothing (stock valve covers with perimeter hold down adapters) is what I am really seeking. If I didn’t care about the bone stock look, I wouldn’t care about the vortec valve cover look.