fat hack, ive noticed the same thing with that comp 270h.i though it would be pretty nice for that 305, but it doesnt have hardly any bottom end and tops out at like 4800rpms. and its got that odd stumbly kinda idle to it. anyways, yes i was plannin on having it rev to at least 6500-7000 rpm. if i have the bottom end balanced and all that it will be perfectly fine running it to 7000. i was lookin at the summit 1105 cam. advertized is 282/292 and .465/.488. it says its got a 3000-6200 powerband. that looks to be right about up my alley. i think it would still make the occational 7000 mark if i wanted it to. not lookin to be at 7k all the time, just every once and while to have some fun. if itll do 6500 ill be happy as a clam! i do have one more question about the cam specs. the LSA is 114*. now is it a lower LSA that makes it lopeyer? i want his thing to lope like a mofo! now for the intake, i know where i can get a nice edelbrock single plane. kind of an older piece too. ill have to get a pic of it. now for the carb... i was thinkin somethin like a mechanical secondary holley 650. i read earlyer that some guys put 780s and stuff like that on a small cuber. does it work well? what would work best? also i was plannin on runnin a set of ramhorns. i know where a set are for cheap. theryre the 2in exits though. they still work well? i might use a set of blockhuggers too.
ok yeah, screw the summit cam, im gonna go with a isky! got to lookin at the 278 mega and THAT is right up my alley! 2500-6800 powerband, lower lift and 106* LSA. sounds good to me... oh yeah, and its only 100bux. cant beat that!
one more question. im lookin at pistons right now and was wonderin if casts will stay together? or should i just go with the hypers?
Lots of good info. in this thread. I dig the high winding small cube Chevy's. Just had my 327 screamin' at 7400 rpm last weekend at the track. Nothing sounds better. A couple of sets of heads ago, I had some 305 heads on my 327. They worked pretty good and I think they would work better on your smaller 283. But factor in that to rev it high, you're going to want to get guide plates to keep everything in line. By the time you factor in machine work to ad them and general cleaning up of old heads, you may be close to some of the less expensive new heads. Just a thought. I went the long way about it only to end up with new heads.
If it were mine, and 7000rpm was going to be a regular occurrence, I'd go for forged pistons. I used to rev stock 283s damned near that high, but that was when ignorance was bliss, and if I blew it up, I could have another one for $50 in five minutes.
Personally I woud build it like my old 316ci "stroker" 283 that I built out of leftover junk that noone wanted. It ran great and I only had about $600 in the thing. Here are the specs: 283 block that was worn right out - needed to take it 60 over to get straight bores, small jounral, 2 bolt main. Guy that brought it in thought it was a 327 and abandononed the complete motor at the machine shop. No trick machining - it was only washed, bored, and honed. 327 crank, rusty and needed grinding, ended up being 30/30. Still used it. Stock bearings in the oversize needed were used, and I had it balanced for the lighter 307 pistons. Instead of drilling, they told me to chuck it in a lathe and take 1/2" off the counter weights and bring it back. Good thing I did or it wouldn't have fit in the block I used! They only had to touch it a few places with the drill after I turned it down to get it to balance. stock small journal 283 rods with ARP bolts - resized, ect. Pistons were rebuilder special 307 castings from Zymol. Gave 9.2:1 compression with the 55ish chamber heads. Rings were moly, but generic hastings rebuilder ones IIRC. 601 casting 305 heads - off of a 84' Z28 that was bing scrapped, that had low miles but was rusted right out. Cleaned them up, ported them, put on z28 valve springs, pinned the studs, and had them shaved so they were flat. Sealed Power 214/224@50 112 lobe sep, 442/465 lift, 280/290 advertised duration. A cam that has been around forever and only cost $60 to have ground onto the original 283 cam core. I splurged for a new set of lifters, new timing chain, oil pump, and pickup. Everything else was stock in the valvetrain. I put it all together with an early 60's 327 intake for an afb and ran a Edelbrock 600, and a stock recurved HEI. Thing ran great, had tons of power and reved very quick. It even got good gas milage with the saginaw four speed beind it in a 79 Camaro, and 3.08 rear gears.
Another thing--if you're using power pack heads and would like to flow a little more air, 1.84 intake valves from early to mid '80s 305 heads make a nice upgrade.
Some catalogs list what the cam will do in the various size engines. a cam that is "moderate" in a 350 will be "mild" in a 400, and a lot more "radical" in a 262, 265, or 283. As displacement grows, the cam size has to grow to maintain the same charicteristics.
You oughtta be happy with that Isky Mega-cam...I've thought highly of them since the 80s when I first tried one out!
283 will wind til tomorrow and a good strong motor.I run a 278H crane cam that works from 2kto5500, large tube hookers, m-22 muncie and final gear of about 4:88.Not much good on a highway but killer take off and in 4th gear real quick.H.O. 305 heads breathe better than 283 powerpack heads but check with somebody that knows what it will do to your compression.A dual plane performer intake and a 500cfm carb I think would do a great job for you and be good on gas.A 600 is a little bit too much but if you use one make sure you get the one you want because there are 2 differant 600's in manual choke.The economy carb has .86 jets in front and the performance carb uses 100's in front.I made the mistake of 100's and I can't lean it out enough to make it right. Good luck
I had a 283 in a 64 chevelle with a old edelbrock tarantula 1 plane intake, holley 600 double pumper, comp cams 292 cam, headers and a 4 speed with 3.90 gears and it was a fast and fun car to drive. The heads were off a 327 and I had a corvette dual point distributor in it. I won a lot of money with that car on telegraph road back in the early 80's! 283 engines like big cams and carbs from what I learned on them!
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