motor combo ...wondering hp and if it could get me into the mid to low 9s

want to buy a ultra block
605 cubes .....wondering also is 4.5 stroke to much?
p-51 heads
crower rods
diamond pistons 13.1
crower cam custom ground
danny bee belt drive
big carb not sure size ect

with a jw glide/tbrake running c16 race gas

want mid 9s to low all motor

car is a 92 mustang backhalved 4 link 9inch 29/10.50w/15


any input would help im gonna do it right buying aftermarket block and heads , realy dont want to use nitrous either

any idea if 605 is a bad bore stroke combo or is there a bettter ci combo let me know

hp idea also

There are several of us on here running low nines to high eights with 534 - 562 inch engines @ 850 hp and less car weight at 3000 - 3200 lb's 4.6 bore x 4.3 stroke = 572 nice combo with the P-51's .

I have seen two 557 engines make 900 and 905 hp with out of the box Kasse's and flat top pistons. These were with stock blocks and 4 bolt aftermarket caps. 4.440 bore and 4.5 crank.

and some doing it with smaller motors and smaller heads.............


If the p51 are ported, and that car failrly light , It would be tough to go 9's...............have to slow it up some to get there............

thanks guys are the 600 inch motors a bad combo vs the 572 ish

and the ultra blocks are a nice piece by the looks ..any u guys using them

any idea power id be making with a combo like listed
thank u

willing to spend 3k on heads just heard p51 heads for money and the bang effect is great

thanks again

A smaller bore seems not to hurt the P-51's like it does on other heads. (valves moved toward center of bore more). Kasse makes good power with them on a.030 bore stock stroke deal. Take a look at Charlie and D Free's EMC engine.

Aftermarket block is a good investment, I wouldn't bore it to big to start, as I don't think it's needed to accomplish your goals. Then you would have several overbores left for later on.

Everyone has their own idea of whats the best bore stroke combo. You can do what your wanting with a 521 cid and 13:1 with the P-51's if everything is right, ( Jon is doing it with 528 inches and a set of ported TFS Streets). I ran 5.70 flat with a 557 and ported TFS Streets @ 124 mph 3000lb, that should be about a 8.90 at a buck fifty throught the 1/4. And you can do it with P-51's on a 605 and be drunk

Call Lem

thanks good info

i like the ultra block

i figuare 602 or 605 and it will leave enuff for re bores down the road