Which springs do you prefer?

[mean05]

actually it will give you less compression....but for 150 complete with 918 springs they are a good set of heads to do some porting/milling and massaging

aren't 853's a small CC then the 317's....thought the 317's were like 72cc and the 853's were 66cc....i'm prob wrong...just curious

[1slow01z71]

aren't 853's a small CC then the 317's....thought the 317's were like 72cc and the 853's were 66cc....i'm prob wrong...just curious

853s=67cc

[mean05]

853s=67cc

damn 1 off lol....then it would raise compression if the 853's are a smaller combustion chamber, not by much but it would do it

[Red03SilSS]

So any HP dif?

[mean05]

So any HP dif?

1 point of compression is worth 20hp...you may get 5hp from switching the heads....unless you do what he said and get the ported and polished

[1slow01z71]

So any HP dif?

Its not worth the trouble of swapping heads unless you get some nice ported ones and while you are at it bump the compression up. The best budget heads out there right now are the patriots, I think TRT has a set for sale now for 700 or 800 bucks which is a damn good deal. With those and milling them to get you around 11:1CR you would probably drop an additional 4 tenths and gain 3-4mph.