Chas
Thanks for this info. The Dart aluminium block weighs only 83 Lbs with caps and sleeves according to the sales guy I spoke to. Where is the difference in weight between the blocks if the Man O War aluminium block (8.2" deck, 4.125 bore) is 108lbs with caps and sleeves?
Also, do you have any pics of the aluminium blocks with the expanded water jackets so that I can see what you mean in terms of their look.
Many thanks for your help
Martin
Mike is correct, I gotta weigh an 8.2 when the production blocks arrive. No sense weighing a PPAP block as often they're not completely machined or require revision.
We won't win any diet contests with ours for several reasons. First, it's a clone of our
iron version which weighs 213lbs (9.5) That's handily heavier than a standard 351 for instance. We know of a customer's 400ci build which is just shy of 1750HP (boosted) and another's who runs regularly at 9000RPM and approximately 1200HP. So the bulk pays off in iron.
The alloy version is the clone with some additional webbing in the valley and rear bulkhead.
Second, there's added weight in the alloy due to the additional bolt bosses at the 12 and 6 O'clock positions for the 6 bolt-per cylinder attachment. Of course, the expanded water jacs too. So that changes the shape as well.
To save you a search, here are two views, to hopefully help. Just shot the one on the engine stand and they're both 9.5's.
Here's what you might see in a GT engine bay:
Minus the Frankenstien wires...
These are our 18 degree heads which are like other aftermarket heads in that they employ 4 bolt-per cyl. attachment. So you see the unused bolt bosses.