: domes and vortecs
May 15th, 00, 02:38 PM
the bottom end of the 302 "clone" is almost done, heres what i got 13.5 to 1 with 64cc heads 283 +.080, second offroad gm 302 grind and a "crossram" intake. Now it's head time, i have just over $450 in the bottom end so sticking with the low buck buid i'm thinking about the vortecs. My question is will the they work with huge domes? How many hp do you think this will make?
May 16th, 00, 04:51 AM
Vortecs and most other modern combustion chambers will not work with the old style domed pistons. If they work with domes at all, the pistons are custom, similar to the Trick Flow pistons they sell for their heads. Most engines these days use flat top pistons.
I think you are stuck with early style heads if you want to keep the domed pistons. A better build would have been to use flat top pistons and late model 58cc combustion chambers to get the compression you wanted.
With respect to the Vortec heads, I don't think you should use them on the high winder you are building. They are light weight castings and were not designed for such an application.
Hugger Orange & white 69 Camaro with supercharged 350, Tremec TKO, and 3.73 12-bolt
See my website updated 4/5/00 at:
May 16th, 00, 10:34 AM
I'm curious as to what gear you are planning on running? I had that same cam in a 327, and felt I needed a 4.56 atleast, and probably a 4.88 to get the best performance. It had 11.1's with 461's, and a Street Dominator single plane intake. The power didn't come in till about 3600-3800 rpm. Just curious. I don't EVER plan on running that cam again, it's kinda outdated with todays current cam technology.
May 16th, 00, 11:58 AM
this one is just for the hell of it, the gear will be a 4.88 and m21. I guess i'll use the 186x's that i have. I got to have aleast 12.5 to 1 with this cam. I'm hoping the engine will turn 8G's.
May 16th, 00, 07:59 PM
I have that cam (1st grind) in a dz 302 and it will pull till 8500. I will more than likely swap cam out at the end of this year. Fun though.
May 17th, 00, 05:26 AM
It is a smart move SS396CAMARO to go with the 186's opposed to the light castings. My brother and I built a 2nd gen 302 with the same set up as you and used the tricked out 882's and FRYED them. Now in the process of another 302 we will be using a heavy casting. By the way. What pistons did you use?
May 17th, 00, 12:22 PM
cheap comp products, $99. I know they will not last forever, but it's going to be fun while it last!!!. the cam is same $59 i think, one correction i think it's the first design. Did you use a 283 overbored? what kind of power did it make. Did you have problems with the valves hitting the cylinder walls?
May 18th, 00, 03:15 AM
Our first stab at it was a 69 4 blt 350/302 innerds, A (CLONE) This one is a 58 283 (thicker walls) bored to 4" using all first design 302 rotating assenbly and cam. No problems what so ever with clearences. What year block are you using?
May 18th, 00, 11:51 AM
early 60's, what kind did it power?. How bad do you think the .045" under 4.00 will hurt. My resoning for the 283 not bore to 4.00 is the durabity factor and trying to get out the cheap as possible, just spent $3000 on a 454 build up(roller and all that crap). I want to build this one for less than a $1000 and give the big block a run for the money. which i think it will, bigger is not always better.
May 22nd, 00, 05:42 AM
Your set up should have plenty of power. The power ours produced was awesome. Ive never heard a small block that sounded like that one did. We fired up the 283 (CLONE) yesterday and it sounds as tho it may have more power than the 350 (CLONE). We will see shortly. TEE HEE! It is a good idea that you didnt go on to the 4" bore cause the later blocks are ?able as I have talked to guys that have had trouble with the 63' and on blocks (think they lightend up on the castings about that year). Good luck with it and keep us posted.
P.S. (HAVE IT BALANCED ALSO)