Looks like I need to quit throwing money at my GM sbc 400 block. It has done treachery second build in a row on #4 main cap to register fit, and I don't trust it any more. And boy that hurts my feelings pretty bad because I sure loved that engine
. It made me happier than any other engine I've owned and I just am having trouble saying goodbye to it. I guess I'll get over it.
I don't trust it any more
. Fixing it again is option 1.
I have another 4 bolted 400 block but it is .040, I have Ross 15:1 pistons for it (not in hand and not sure of their compression height) but no rods or crank. My current engine is .030. If my Ross .040 pistons are the same compression height as my JE .030's...I could put my Childs rods on them and rebalance with my 3.80 crank. That is option 2. And something tells me I would run into a costly SNAFU.
Find another 400, 4 bolt it and take it to .030 is Option 3.
All these options cost, and take me to Option 4. New Dart Little M with billet caps 4 bolted on all but #5 and 1/2" bolts on #5. Talking to Carl and Mike about deck heights I realized that my little 3.8 stroke crank needs 9.015 deck whereas most strokers need 9 even. I don't like the idea of buying a new block at 9.015 so I can run my 3.8" crank...and having to re-deck when I eventually go to a 3.875 stroke.......................................
I just pulled the trigger on a new Dart block from Carl Hinkson and a new rotating assembly from Mike Lewis.
We're talkin 421 baby
Callies Magnum knife edge crank
Compstar rods(I'll let you know what I think on them after I see em) Mike says they are good
My choice of top of the line pistons
With rings and bearings, all balanced by Mike
And a Dart Little M block at 9.000 all CNC'd by Carl, no more weak block woes
So, only 2 or 3 things yet to decide
What's yalls thoughts on compression ratio vs power gain?
Here's the goal. Can flat-tops and pump gas do it? 14:1?
Sub 10 second naturally aspirated small block
Sub 9 second juiced, on the same cam