I'm trying to figure out what size motor to build when I get my aluminum block. Is it possible to get 2 hp. per cube with a Buick motor?? I have Stg. 2 TE's, that flow in the high 360 to low 370 range, 7 inch GRP aluminum rods, and a 3.95 stroke Moldex crank. If I go the 4.40 bore, looks like a 480 ci motor, and should be about 13 to 1 compression, from the on line horsepower caculators, that could be 770 "ish" horsepower. I was hoping for more...This will be a nitrous motor, so even with the 770, add on 200 to 300 or 400 of nitrous, that should just crest the 1000+ hp level. Like I said, I thought it would be more. From my figures, my 12.5 to 1, 464ci motor I have now makes about 700 on motor, and then with the 200 shot, from the numbers it's putting about 800+ to the rear wheels, 3600 lb. car running 9.44 @ 140+mph. What do you think?? Gary G.
Could be tough. I know a guy with a N/A 11:1 460 ford bored and stroked out to ~580cid with 700+Hp at the wheels, guestimates in the mid-900hp at the flywheel. Runs on pump gas too. Drives a convertible mustang and won a drag week class a few years ago. Runs 10 flat weighing 4200lbs and terrible 60ft because the autocross/street suspension set up. If you go for more compression, a nastier cam and nail the tune, I don't see why not. Bill drives his on the street and autocrosses it, etc. so lots of comprimises in the build and tune. Heck, even gets 14mpgs with the EFI and AOD.
Yes, but just speaking for myself, id be a little leary of pushing that block that hard by internal methods. I love cast iron, got nothin against alum, but would push internal only to a safe margin, and go as far as I could external. Just My thoughts Good luck Wil
Considering the core shift issue with the old iron blocks I'd feel safer with aluminum. Remember that Chevy Gen3/4 can run 700+ horses on a stock aluminum small block. That's right at your 2hp per ci. I'd say a modern aluminum big block should make over 700 horses if you can make everything work together. Just have to decide exactly what rpm you want to have your power at and make all the parts work to that goal. Of course with it being a big block it may be more fun to focus on huge torque numbers and try to beat people off the line.
Gary, the calculator at http://www.wallaceracing.com/et-hp-mph.php is almost dead nuts with the dyno that I use (same one Bobb and Geof at Finishline use) The 9.44 comes up to 845 at the flywheel. Scott
Gary, Supercharge it! Several folks have gotton 2hp/CI plus using centrifical blow thru set ups. I know we hit just over that number w/ my combo.....can only dream of what we could have done w/ a new block and billet crank. Have fun!
"Supercharge it", but I already have the nitrous unit. Either way if I sold the unit, I still wouldn't have enough cash to buy everything to supercharge, and even if I bought a fogger unit (bigger), I would still have nowhere near the amount spent compared to everything needed to supercharge, and I will make 1000 to 1200 horsepower....I do not have any concerns regarding the strength of the aluminum block, pretty sure it'll be able to take whatever I throw at it. And I know compression makes horsepower, but 13 to 1 and nitrous I'll be good. Pump gas is not a concern, this is a race car. Bobb M. at Finishline is going to help me figure this all out when I get the block. Gary G.
I understand the money issue....believe me I am already putting money aside for a block and crank....for when mine goes BOOM! You will have very fast ride and dependable ride w/ your new parts and the hose.....no need to worry about the 2hp/CI. I am sure you will hit your goal. How fast do you want to go? BTW very cool car!
i dont think thats near enough cylinder head for 2hp per cube on that size engine more like 425 cfm with a larger port volume to rev it up and then an extremly aggressive roller in the 290 @ .050 and 8500 rpm range if its is NA
with a power adder like nitrous that is no problem, I make around 3hp per inch, Aluminum blocks bend and flex, Iron blocks crack period. go to the track and look at any car going really really fast they will have an aluminum block...Just set your engine up to get the most out of your nitrous and I would hit it with at least 350 or 400hp.. My heads only flow 360 with a power adder through all of the theroy's out the widow
I think if you supercharger (centrifical) you will save money in the long run. You only buy the charger once. You won't have to keep filling a bottle. The motor will live longer. It will idle easier You "only" need to invest say $5000.00 on a motor to run good numbers instead 15,000.
I say go with a Procharger or Turbo, why waste money on bottle refills? Nitrous is cheap in the short term but expensive in the long term.
