getting ready to put a sbc together for bracket racing.......sorry guys its going in a s-10 truck......

this is what we have so far for the combo

350 bored .030
stock rods, with new h617cp30 pistons.....they have a 11.8 cc dome
60 cc measured sbc head with 2.02/1.60 valves, three angle valve job and porting has been done, dual spring set up 1.555 i dont have the casting number.....
cast crank stock, polished
single plane intake....weiand x i believe
carb will be 750 vs for now....will either get 750 double pumper or 850 doublepumper soon after the motor is complete and running.
we got shorty headers for now....
3200 brake stall 10" convertor for now at least thats what it did in the camaro before we removed from a sbc that was running 13.20's with the summit 234/244 cam
th350 tranny
gears are open for now maybe go with 4.10

the compression ratio will be somewhere between 13.0 to 14.35 depending on how the measurements go for deck and what gasket we use ....the bottom line we are going to run the most we can get.

the engine is going to be limited to 7000 rpms and we want to go with like a short 105-106 LS cam

we was looking into the 255/265 solid range @ .050 with somewhere of .540/.550 lift.

we realize we are playing with a stock bottom end and thats why we are limiting the rpms...the engine will run on straight 114 octane fuel,

ignition is msd 6al , hei locked out of course,

the block , crank, rods, pistons, intake carb, headers, convertor, tranny, heads are done we just need to start to put together, the parts may not be the best picked but thats what we are using no moatter what to get things started.....just using whats laying around the shop for now.......

there is a very good chance...more then likely convertor change if needed, carb will be changed for sure, maybe intake if not good enough, headers not the best design but more then likely will stay.

this engine is being built for fun.....if it lives for a few months great....just would like to see what others think of the cam and maybe might recommend.......and see what gears might work too........ think we need more convertor closer to 4000 rpms but we will see what it will do with the one we have first then may change out.

this is budget fun.......run til it blows and laugh about it......

I may have just what you're looking for and pretty cheap, too.
A Comp Cams 310B-4 solid.
It is 310*/320* advertised, 275*/283* @.050, .585/.588 lift with 1.5 rockers, and it's on a 104*LSA.

It was in a piece of ***** 350 that was in my Vega when I bought it. It had completely stock 462 heads milled to 60cc's with 1.94/1.50 valves, no porting, cast crank, stock rods, 12.5 TRW's, a Vic Jr. and a 750 alcohol holley. It ran 6.80's in the eighth in this trim at 2800lbs. with me in it. It had a PG with a 5500 rpm converter, 4.56 gears and 14x31 slicks. It would rpm to 7000+ nicely.

I'll look and see if I can find it if you're interested. I'd take 50 bucks for it. No lifters.

I also have the Hughes 8" Trans-brake ready PG converter out of the same combo. It stalls 5400-5600rpms on the T-brake. It'd probably go 4500 or so on the foot brake. It's in good shape. I'd take $250 for it. You pay the shipping. I'm in Dallas.

Randy

Crane 285M will work well for that.

thanks toyzrme...thats alittle more cam then we would want to go......

1968 the 285M do you have any specs on that cam.........i have an older crane book but i didnt find it......

285-2M @.050 I 250° .533 lift 106° Lobe Sep
E 260° .555 lift
I opens @.050 21°btdc closes abdc 49°
E @.050 58°bbdc closes atdc 22°
Part #WG 5083 grind #285-2M
This stick is suprisingly drivable my customer runs mid 10's on a 150 shot w/3:73's and a 10 super holeshot converter in a gbody Bu.
peaks out around 7300 in a 365 cube motor.

I was under the impression that SB's didn't keep building power above about 12 to 1 CR. b/c the piston dome created less then an ideal flame front upon combustion across the chamber??

What's happening to allow this high a CR.??

I mean, they would still keep making more power, but not at the same increase/rate(?) as at the around 12 to 1 CR. level is all....

pdq67

I have 12.7-1 with flat tops.....4.155 with a 53cc chamber

with an effective 11.8 cc dome and cc'd 60 cc head that leaves 48.2 of chamber left.....of course our other factors will be deck height and gaskets we used to get around a .035 piston to head clearence.....

once we get the pistons in the block then we can figure the gasket that we will use. since the block was not deck were hoping it will be around .020 so we can use steel shim gaskets....

i heard as well that really anything over 12 to 1 compression its kinda a waste....but for this fellow he wants it all he can get.....

thats why i dropped my compression on my 468 from the 14.9 in my best hole down to 13.9 without killing the quench to bad.....hoping i might gain some in a better flame front.....