Seems like Dave is just dying to make major changes to a combo that only has a hand full of runs on it.
Still no determination on the valve spring situation and the affect that could be having on the lack of top end pull.
If you really couldn’t find someone to test the current springs........ they’re not that expensive.
Buy something new that is a good match for the cam and just put them in.
Less than $200 and a few hours time.
It’s your car........ so you’ll go about it however you see fit.
He computes my combo to 570hp. That's pathetic in my opinion.
Soooo....... you think that if you pulled your motor out, brought it to a reputable dyno service and ran it just like it sits....... it would make 570hp?
A motor like that should be 675-700hp.
If you did nothing but swap to TF270’s...... you’d be expecting to pick up 100-130hp over your CNC ported Victors....... with zero other changes?
That would mean you’d be expecting to pick up 7-9mph in the 1/4 from the head swap alone.
