- Apr 18, 2009
- Reaction score
- Prince George BC
I think that's what hot rodding is all about. Using what you have
NO, I think that cam is too big for 302 heads in stock form. If you go with the swirl-port 302s, make sure you step down to a cam with lift more around .450" on the intakes; that's about the most stock 302 heads will take. If you port them well and gasket-match them to the Weiand intake then I'd say you could try that Crower cam. Also, with the Crower cam I think 9.0:1 compression would be the bare minimum; 9.5:1 would be better, and 10:1 would be the best.
That cam would also work well with J heads (and the Weiand intake, or possibly the Edelbrock RPM which is the next step up in size I think) but in this case compression is even more vital... at this point I'd strongly recommend some shorter gears and/or a higher stall converter because bottom end might begin to suffer with the larger "non-swirl" ports.
Other than the valve guides hitting the retainer, how is it too big? Considering a flat tappet cam doesn't spend much time with the valve open at max, and a 302 head 318 will pull decent to 6K......
Just the owner of more than one 302 headed motor here curious about your theory.
ya ya those are the ones you want. those are the same chamber as the magnums if i remember right or darn close use those and clean the bowls up and port match them to intake and try a smaller cam your stock pistons are in the hole like .120 the performer might be a good cam but I would look into the smallest comp thumper they make a reg hyd flat tappet cam for us mopar guys now it closes the exhaust valve earlier and helps build compression and gives you the sound of a larger cam they just dont like to rev real high like past 5800 but you shouldnt need to rev yours up that high anyway also what intake are you running
I do have allot of parts to choose from. Four intakes (three are edelbrock performers though), J heads or 302 heads or the stock ones, 360 or 318, 904 or 727, Carter AVS or TQ or brand new in the box Edelbrock 1406. Edelbrock performer cam or Crower Beast, All of that stuff and I still don't think I can build an engine. I was hoping to sell a few of the things so that I could get my car together, but no one wants to buy. So I'll hold onto them. I figured that the J heads would have been worth $250 to someone. They are worth that much for me to keep. Shipping on them was going to be over $100 though. I just have to wait. Slow and steady wins the race, right!
Here is the new hyd thumper cam from comps website
COMP Cams #CL20-600-4 Thumpr
CHYSLER MOPAR 273-360 HYDRAULIC FLAT TAPPET CAMSHAFT & LIFTERS
Chrysler 273-360 C.I. 8 CYL. 1964-2000
Hydraulic-(Thumpr) High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.
Now available for hydraulic flat tappet applications, COMP Cams® new Thumpr Camshafts are the hottest cam series to hit the streets in more than a decade. Street rodders and muscle car enthusiasts just cant get enough of the incredible exhaust sound and equally impressive performance delivered by these innovative camshafts. Applying a new camshaft design concept originally created for sports car endurance racing, the COMP Cams® engineering team incorporated early exhaust valve opening, long exhaust duration and a generous amount of intake and exhaust overlap to maximize your engines nasty-idling characteristics without negatively impacting power output or streetability.
.486 .473 107°
Rumblefish I have the older version of that crane cam it is .464 .497 lift powermax cam that is a great cam for mild 360 build with the 112 lobe sep
I went 13.1 @102mph with some 1.88 valve heads and the performer intake and 3.91 gears with that cam and it had loads of torque it felt as good as my 408 down low sometimes going bigger is not always better
BUILD STREET DRIVEN CARS FOR TORQUE!!!
just port match the intake to the gasket.
Put the gasket up to the intake line up the bolt holes and mark where the gasket lays spray paint over the gasket
Then do the same for the heads and grind off the area that is painted
maybe someone else could explain better
if you are going with 3.23 gears use the performer intake mare bottem end
the whole point of a 302 chamber is to promote swirl.. so chamber mods like that are not recomended IMO.2.02 yes, 1.88? Not enough of a difference to notice from the stock valve. If anything, the chamber of the 302 will shroud, not the cylinder bore.
the whole point of a 302 chamber is to promote swirl.. so chamber mods like that are not recomended IMO.
once you start milling heads + high lift cams + big valves the valve gets pretty close to the bore wall.
even the 1.88 valve will be to close for comfort with a moderate lift camshaft. but all this is JMO.
I recommend if anyone wants to do the 360 1.88/1.60 heads on their street 318, that they use a dual plane 'or more gear', have as high compression they can run on pump like 10.8ish 'quench dome would be nice, and keep the cam's O lap right on the edge of letting ping as to get max torque/hp for the combo/comp [around 62-66*], and of corse ...the most initial timing it'll take with what ever it likes for total 32*-34* er what ever.
And if porting, beyond 245ish is gonna make it worse cc wise, it starts getting big in there.