hey guys i'm running the cc305 with 918 beehives, comp pro mag 1.6s, stock lifters. what would i need to switch besides the cam to upgrade?

 

comp R lifters, HD timing chain

 

do i really need the comp r's when i'm running the beehives? what timing chain can i run on the non vented opti?

 

it is best to run the comp R's with those cams because you'll be running the rpm's up to 65-6700 rpm or so, and i think stock lifters are only good to around 61-6200(someone correct me if i'm wrong), LT4 extreme duty timing chain, or, what i'd suggest wich will also free up some hp, is get a cloyes double roller for like 80$ at cmotorsports.com and then get an electric waterpump. those 2 together work out to be about the same if not cheaper than the extreme duty timing chain.

 

aren't alot of people running the stock chain? can i run either of those chains with the non vented 94-94 opti? will the comp 918 springs still work ok?

 

do you'll have the part numbers for the timing chain i need?

 

918's will work, installed height might play a role at what point they bind tho
jump on google or yahoo and search under rollmaster timing sets or cloyes timing sets
and then look for the sets that are available for hydraulic roller blocks (small block chevy of course)

rollmasters are nice billet machined pieces and they cost about the same as cloyes

lots of people use stock lifters with those cams
lots of people switch too the R's (875's) also but they can be a pita too adjust
another option is comp 850's, they are basically a better OEM type lifter that dont seem too have as much adjustment issues as the R's

 

ok cool. my major issue is the timing cain. i thought the above ones wouldn't work with the old style opti??

 

being as i have a '97, i didnt even think about that
yes from what i know, you will need too swap too a vented style opti and '95+ timing cover too use one of those timing sets

which swapping too the vented style stuff isnt a bad idea in the 1st place

 

yeah its just that i have abrand new opti on my car right now

 

btw..whats the difference in the 306 and gm 847??

 

well someone makes a double roller timing set for the earlier optis nut it costs like $400+
maybe try the lunati set (not a double roller, its a link belt type chain like stock but might be of better quality (?))
or check into the GM stuff (LT4 or HD sets)
i'm not sure if those will work either tho

try searching those cams on here, you will find a **** ton of info on them

 

If more power is what you are after then some ported heads would really wake that cam up. I bet youd be a lot more satisfied with the results of that cc305 and ported heads than a big cam, stock heads.

 

yeah i kno lt4 won't work. is a new stock one a bad idea?

 

i have mildly ported heads already