tooslow5.0

is this cam with 1.7rr p+p cobra gt40s, cobra intake, frpp shorties, orx pipe, flows, a good setup? im lost when it comes to cams. i need smog legal, good power to at least 5500rpm's, and no valves smacking the heads. the heads are not milled more more than just a clean up. i also want an idle that is not jumping around,so these crane cams "emissions legal, computer compatible" cams sound good. my concern is that they have less duration and more lift, which may or may not be a problem with my 1.7's.

http://store.summitracing.com/partde...p;autoview=sku

silentvoice19

if i was you i was just stick with the 1.7 your gettin alittle dangerous with that combo when you go that route you have to change you valve springs or your gonna get float 1.7 if you dont mess with cam 1.6 if you do.

tooslow5.0

yeah, but that kit comes with valve springs and everything. im just worried about valve to piston clearances

OnyxCobra

That cam with 1.7s is going to have some serious lift, have you looked at the Steeda #19 cam? It has low lift so it's good with 1.7s and it has nice duration, plus its computer friendly and should pass emissions.

dimebag

thats alot of lift as is... you dont need all that for gt40 ****. im doin a gt40 build now with only .512 lift, and similar duration numbers, more lsa tho.

tooslow5.0

im definetly interested in the steeda 19, but its not in my summit catalogue, and i will be useing gift cards to purchase it. i hear alot of talk about that cam, whats so special about it? what kindof power would it add to an otherwise stock 302 cobra engine?

Joel5.0

If you're stuck with a package from Summit and 1.7 rockers, check........
http://store.summitracing.com/partde...p;autoview=sku

tooslow5.0

interesting, thanks joel. what kind of lift will i end up at with the 1.7s? still within safe limits for valve clarances?

dimebag

.563/.563

as for clearance, i dont know... i thought that was too big... joel will have to chime back in about that, but if he suggested it, i dont see why it wouldnt work

Joel5.0

Dimebag, lift and the possibility of PtV issues are "non-related" items, you could have a .600" lift cam and not have the valves touch anything....... or a .480" lift cam that would require heavy piston notching (these are examples BTW, not saying that you would need or use any of those)....... but with the specifications of that camshaft + it's CARB approved (= "emissions friendly"), the possibility of having any PtV issues is very low, BUT YOU ALWAYS NEED TO CHECK! .......

The cycle that causes PtV problems is the overlap, when both valves are open (exhaust closing and intake opening) at the same time, piston is in the TDC vicinity (very close to the valves), and the valves are only .015" - .155" (dependent on cam specs) off of their seats.... reason why total valve lift has no bearing on PtV problems.