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you need a melonized gear with that camshaft.

Did some flow testing again, with my new ferrea 2.06" valves and small short turn reshaping, made the short turns 0.08" wider, valve has round back cut instead of 30 degree back cut and BOOM!!

BAD port 28"

0.100= 71.3cfm same
0.200= 157cfm +3cfm
0.300= 228cfm +22cfm
0.400=253cfm +24cfm
0.500= 261cfm +18cfm
0.550= 264.5cfm +16.5cfm
0.600=266.2cfm +14cfm

GOOD port 28"

0.100= 71.2cfm +3cfm
0.200= 154.5cfm +8.5cfm
0.300= 229.7cfm +21cfm
0.400= 265.7cfm +15.7cfm
0.500= 275.4cfm +25.4cfm
0.550= 272.2cfm +22.2cfm

a good small block head will outflow those peanut port heads.

Quote:

Originally Posted by seaman (Post 4667393)

i found an extra copy of the dyno sheet but don't know how to post it on here the motor made 431hp at 4800 and 527tq at 3600

Stock 454 mag did 420-430 on Dyno! New stock motor about $7000 do the math it may just be worth it???

call 1-800-runs new JJ no longer there but John good!

Quote:

Originally Posted by mike tkach (Post 4717006)

a good small block head will outflow those peanut port heads.

Ofcourse it will. How much do you think 400cid small block would push with my flow numbers and 224/234, 0.550/0.570, 110lobe hyd roller camshaft.?

It is time to order timing set, comp 7101 seems perfect. ZZ502 camshaft has 110 lope and 108icl, so it is only 2 degrees advanced. Did some valve timing calculations with different ICL choices and compared the results to crane 731 and HP500 carb camshaft. here is what it looks like @.050.

.................................................. .................................................. .................................................. ............IVO ......................IVC ....................EVO .......................EVC ...........Overlap

-Crane 731, 226/236, 112 lsa, 107icl ground to cam .................................................. ............................6*btdc ..............40*abdc ..............55*bbdc.................. 1*atdc................ 7*

-HP500, Crane 611, 222/230, 110 lsa, 105icl ground to cam .................................................. ...............6*btdc.............. 36*abdc.............. 50*bbdc.................. 0*atdc................. 6*

-GM zz502, 224/234, 110 lsa, 108icl ground to cam, 4 degrees more advance, 104icl. ........................8*btdc.............. 36*abdc.............. 53*bbdc................... 1*atdc................ 9*

Not sure but with 104icl the ZZ502 cam would work with silent choice system.

Quote:

Originally Posted by mike tkach (Post 4717419)

what is lope?

you know, cacklefest.......:D