| Engine swap on the C1 |
Subject: Engine swap on the C1 by wesmigletz on 2008/11/14 16:44:48 I pulled the 62's original 327/300 HP engine a few weeks back, in anticipation of some part swapping and dyno testing. The testing is on hold for now, but since I had the engine out, I'm going to go ahead and swap my old truck's 383 back in. The engine is an 010 350 block, with 4 bolt mains, and .030" over bore. Fresh rings and bearings since I pulled it back out of the 62. An externally balanced 3.75" stroke, 5.7" rods, 12 CC dished pistons. It has an Engle HR cam with .492/.501" 223/232*, 271/282* adv on a 112* LS I put a 1.6 rocker on the intake and a 1.5 rocker on the exhaust. The heads are 180 CC Dart Pro 1 Platinums, with an advertised 64 CC chamber. The intake runners actually CC'd at 191 CC and the combustion chamber was 69 CC. Having paid a premium for the Pro 1 Platinum Heads, I expected the statedvolumes to be accurate vs the measured volumes. Oh well, don't cheap out, buy premium parts, from a reputable manufacturer, and you get what you pay for, right? The combustion chambers have been milled to 65 CC. The intakes flowed 253 CFM @ .500", and exhaust flowed 203 CFM @ .500" lift. The low lift flow numbers weren't bad. If I can find the flow sheet, I'll post it. My plan is to finish assembling the engine: cam, lifters, heads, intake, tin, etc. on Saturday, and drop it on Sunday. Not sure what intake I'm going to run on it. I'm torn between an old C4B, a GM #461 327/350 HP Chevelle intake, and a Weiand #8120 low-rise dual plane. I like the C4B for a nostalgia look, but mine has several stripped threads. The C4B and the #461 both let me run an oil fill tube, which in turn will let me run closed valve covers (I vented the block last time I had it in the Vette). On the other hand, the Weiand #8120 is a pretty decent piece and only gave up 1 MPH vs a Weiand high-rise Airstrike dual plane (which doesn't fit under the stock hood). If all goes well and the stars are aligned, I will be running it at Famoso on 11/22. I'm curious to see how an aluminum headed, roller-cammed stroker compares to the relatively gutless original engine. EDIT: TO ADD CORRECT CAM SPECS. |
