As a continuation of my long term issues
with my health and engine in my 69 I'm starting a new thread.
My health is good now and it's time to get this Camaro back in order for Spring. Hence, 'Project Resurrection'.
Long story short (read the link above), while I was in the hospital I let someone build my 406 for me, first engine I haven't built for myself in 20+ years, and I don't think there is a correct clearance in it. So I decided to let it sit until I could build another.
I have a nice 511 casting 400 4 bolt over at G&G Machine in Stephenville, Texas (Donnell Gaines). Some of you may know who Donnell is but he has a long time reputation as a great engine builder, I know him personally and trust his work, plus he is only 30 miles west of me. He has align honed and decked the block and is waiting on the Scat stroker kit to arrive to finish hone and assemble.
I went with the Scat 1-90610BI which is a 3.48" stroke Scat 9000 series cast crank, forged I beam rods and forged Icon IC9938 pistons which are -3.7cc flat tops, all balanced by Scat (although Donnell is going to check it all to verify everything). Why a cast crank? I'm not going to make enough HP to require forged but certainly prefer forged rods and pistons even though I'll never spray it.
I was going to use my Edelbrock RPM Performer 70cc heads but as they are 185cc and have some years on them I decided to go with a pair of Dart Pro 1 200cc heads at 72cc which flow a little over 300 with the 2.05/1.60 SS valves and CompCam springs/guidplates. Along with my Edelbrock Air Gap intake it should work well. I'm keeping my new Edelbrock 750 but will get it tuned properly this time.
I selected a Howard's hyd roller kit .500/.510 - 278/284 duration but with 1.6 CompCam rollers which should give me about .533/.544" of lift. Lobe separation is 112 so should help scavenge well but still be streetable with my 2400RPM stall.
Once I get the old 406 pulled and get some of the external stuff off then we will get the 380 on the dyno and see where we stand. Should knock down around 450HP at the flywheel but push the curve up a bit. The 406 was likely making about the same HP, maybe a touch less, but had gobs of torque and could never hook up with the ArtCarr 2004R banging gears. Even with my sticky Nitto 275's it was a lost cause so maybe this will push things up in the RPM range a bit.
Some may ask why the 377/380...why a destroked 400, why give up the cubes? It's a valid question but I simply wanted to build a slightly hotter big bore short stroke engine. Maybe the Z/28 badges made me want a short stroke setup, I dunno, regardless it will be fun to see where it falls on the dyno and how it performs on the street. As a Pro Touring type of car it makes sense and would be fun for a track day too.
I'm keeping the 302 badges on the hood though.
Anyway, will update as things progress.
Oh.. and once the 406 is out we'll see what/if is really up inside. If all goes well then I'll refresh and put it on the engine stand for the next project...maybe something off road.