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Old 03-07-2013, 10:42 AM
logan1 logan1 is offline
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SBC 355 Cam selection

Im ready to buy a cam and need a little help make the best choise for my setup.
First off I cannot afford a roller cam and so would like to go with a Flat tappet cam. Currently i have a Comp cams 268H hydraulic Flat tappet camand would like to retial the lifters if possible. But am not oppose to moving to soild lifters and cam if i can get a justifiable gain out of it.

The car is a Datsun 240z weighing in at around 2400lbs. Coilover suspension and lots of monocoque bracing for stiffness. I would like to be bale to run power brakes but am willing to run a vacuum reservoir canister if needed. The car is going to be 80% street and 20% autocross. Very little if any strip. Like anyone lese building a hot rod i would like to make the most power possible and have a aggressive idle sound; while makeing it a fun driving street car.

The motor is a:
SBC 350 bored 40 over.
Aluminum Patriot freedom heads 185cc runner 2.02 intake, 1.60 exhaust.
Fel pro 1010 head gasket
Edelbrock RPM airgap intake
Holley 700cfm double pumper
flat top pistons
9.75:1 compression ratio
MSD billet distributor
MSD coil
Summit racing mutli spark ignition box with 7000rpm rev limiter.


Manual 5 speed borgwarner transmission with the following gears:
1st – 3.35
2nd – 1.99
3rd – 1.33
4th –1.00
5th – 0.68

Differential:
R200 4.11 gears

I called Comp cams and they recommended the XE274H cam.
XE274H-10, Camshaft Part#12-246-3 Dyno Sheet

I called Summit racing and they recommended XE284H cam.
XE284H-10, Camshaft Part#12-250-3 Dyno Sheet
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