383 Street Cam Choice

[bytor]

obviously budget concerns here do matter,and a cast steel crank is stronger that a cast iron crank,
but personally Ive always felt going with the forged 4340 and internally balanced rotating components and forged pistons was well worth the cost increase , I don,t worry about something coming loose with an all forged rotating assembly and 7/16" ARP rod bolts

Yep, that's what my gut was telling me but my wallet was getting in the way. Thanks for the advice. Finally got my block back from the machine shop so I'll be getting busy on it soon.

 

[Indycars]

I just noticed in your signature line the link to your photos. Those are some good pictures, you
should post some here when you get a chance! Maybe start a build thread.

Also looks like you have a really nice clean shop to work in!

 

[bytor]

Be sure and post any pictures you have of them, it would be interesting to see how they compare.

Indycars, here's a few pics of my Dart SHP heads right out of the box. Everything looks good but the intake runners will need some cleanup for sure.

 

[Indycars]

The Dart SHP and Brodix IK heads look very similar, of course that's only what one can tell from a visual inspection. The one thing I did notice is the location of the sparkplug(SP). Your head (Dart) seems to have located the SP closer to the deck surface. No threads showing along the chamber roof, like my Brodix IKs. And maybe a little closer to the center of the combustion chamber. I see what looks like more of a bulge into the chamber where the SP boss is located.



Have you decided what work you are going to do to your heads? CCing, Polish Chambers, Bowl Cleanup. At the very least I would disassemble them and clean them up real good. I found many aluminum chips in the springs and such.

 

[grumpyvette]

... At the very least I would disassemble them and clean them up real good. I found many aluminum chips in the springs and such.

yes this is often over looked and frequently the source of an amazing amount of machining trash the manufacturers failed to remove prior to shipping new parts, Ive seen casting flash, machining chips , and drill chips that would absolutely amaze you left in new heads

related thread
viewtopic.php?f=50&t=6255&p=21695&hilit=cleaning+parts#p21695

 

[bytor]

... At the very least I would disassemble them and clean them up real good. I found many aluminum chips in the springs and such.

yes this is often over looked and frequently the source of an amazing amount of machining trash the manufacturers failed to remove prior to shipping new parts, Ive seen casting flash, machining chips , and drill chips that would absolutely amaze you left in new heads
viewtopic.php?f=50&t=6255&p=21695&hilit=cleaning+parts#p21695

Yep, I intend to disassemble and cleanup the runners, port match, polish/cc the chambers and lap/leak test the valves. The heads had tape covering all the water jacket holes out of the box but I agree, a through cleaning and inspection is important before slapping them on.

 

[Indycars]

Bytor,

You may very well know exactly what and how you want to CC and port match the
heads, but for anyone that needs some ideas read these posts.

"cc your cylinder heads"
viewtopic.php?f=52&t=2077&p=5565&hilit=ccing#p5565

"How to Accurately Measure a Volume in CC "
viewtopic.php?f=50&t=4618#p12357

"Port Matching Procedure (Step-by-Step Guide with Pictures)"
viewtopic.php?f=55&t=5378&hilit=port+match

"port/gasket matching an intake"
viewtopic.php?f=55&t=2773&p=7200&hilit=port+matching#p7200