Most SBC run best in the range of 36 to 38 total timing with some exceptions, my 306 had a giant dome and wanted 42+. The engine in the the dyno was never track tested.steve cowan wrote: ↑Sun May 06, 2018 6:01 pm Gary,
thanks for sharing,i figure i can make around 420 as well
this thing has a lot of piston to bore,old trw pistons,5/64 rings
stock rods and bolts,like i said just a throw together while other motor is getting sorted want to still be able to race and have some fun.the other cam is comp solid F/T
270xos-8
adv 270-280
dur @ 0.050'' 240-246
LSA 108
lift 510-519 - 1.5 rockers
any advice on what intake - exhaust % ratio to work to ??
i am running 1.6-1.5 stud mount rockers and stud girdle at the moment
i will source some 1.5 rockers for intake.
if the intake has reasonable fitment i will run it first out of the box and proceed from there,i dont want to mess up a good intake.
On the 331 in the dyno sheet I wanted to see an Air Gap and a 268 to 272 cam with a 1.6 or 1.65 intake ratio to see how it ran down low, he was building it for a street rod not a race car and was some what disappointed with the sound and idle quality of the cam as I told him he would be, he wanted to change the cam after the dyno session but he ended up selling all of it before completing the project.