Bukin 67
Bronco Abuser
- Joined
- Jul 3, 2008
- Messages
- 2,262
Sure Craig, I'll pm it to you later. I've got it on the home pcHoly cow that's got to be close to 500 hp at the motor. I'd like to see your spec sheet if possible.
Craig
Sure Craig, I'll pm it to you later. I've got it on the home pcHoly cow that's got to be close to 500 hp at the motor. I'd like to see your spec sheet if possible.
Craig
Holy cow that's got to be close to 500 hp at the motor. I'd like to see your spec sheet if possible.
Craig
Todd
I can post a vid of mine running at idle for you I you want me too
It is very smooth but you know something non stock is under the hood
Chuck
TZ, you've heard my 347. It's set up for 'lower' end torque. If you want the spec sheet I can send it to you. 425hp at the ground.
With proper timing and fuel/air ratio you should not having cooling problems at idle. Yes it may run a little hotter than 190 but when your thermostat opens fully by about 220 and you have a good radiator with a fan shroud, I don't see why you would have cooling problems.
My 408W runs a little hot, but I also have a smaller fan than stock because I screwed up when ordering stuff. But once the thermostat opens up it does a decent job. I am using a 3 core Champion aluminum radiator. And no, aluminum radiators do not cool better than copper radiators.
Some people may wish to call me out on this, but I am a degreed engineer and versed in the laws of physics. I would also we leery of anyone telling you they have 425HP at the wheels (at least 500 at the crank) from a streetable "built for low end torque" motor. There are dyno machines out there that horribly miscalculate the horsepower at the wheels. I have seen several of these at car shows.
Look at any 500+ HP 347 and it has high compression and a very large cam for high end torque. Just not happening on pump gas compression and a low end torque cam. For starters, peak torque is going to be about 1.15 to 1.25. A 408 would have expected peak torque of about 500 lb-ft. A 347 about 420 lb-ft. An engine built for lower end power but above stock sized cam will have peak torque happen between 3500-4000 rpm. It will drop off after that. Provided the formula for horsepower, at 6000 rpm you would need 440 lb-torque to produce 500hp.
Read this article to see what it took to get 530hp from a 347 stroker. Huge roller cam, 10.5 compression which is certainly on the verge of pump gas with the AFR heads, a single plane intake, additional porting, etc. They probably had huge diameter headers and exhaust on this engine which is absolutely critical for high end horsepower, but also zaps low end torque. Look how high they had to rev that thing to get that horsepower. Horsepower = (torque X RPM)/5250.
http://www.enginebuildermag.com/2007/08/the-shermanator-347-a-530hp-gas-stroker-you-can-build/
A realistic, street friendly stroker for a Bronco is going to make 400hp or less at the crank. Keep the .050" duration under 230.
just wondering if anybody knows of a good source for create engines. I am looking for a 351. I know there is a lot out there, just looking to see if any body has had good luck. also any tips would be helpful I never ordered a create motor before.
thanks Dave
With proper timing and fuel/air ratio you should not having cooling problems at idle. Yes it may run a little hotter than 190 but when your thermostat opens fully by about 220 and you have a good radiator with a fan shroud, I don't see why you would have cooling problems.
My 408W runs a little hot, but I also have a smaller fan than stock because I screwed up when ordering stuff. But once the thermostat opens up it does a decent job. I am using a 3 core Champion aluminum radiator. And no, aluminum radiators do not cool better than copper radiators.
Some people may wish to call me out on this, but I am a degreed engineer and versed in the laws of physics. I would also we leery of anyone telling you they have 425HP at the wheels (at least 500 at the crank) from a streetable "built for low end torque" motor. There are dyno machines out there that horribly miscalculate the horsepower at the wheels. I have seen several of these at car shows.
Look at any 500+ HP 347 and it has high compression and a very large cam for high end torque. Just not happening on pump gas compression and a low end torque cam. For starters, peak torque is going to be about 1.15 to 1.25. A 408 would have expected peak torque of about 500 lb-ft. A 347 about 420 lb-ft. An engine built for lower end power but above stock sized cam will have peak torque happen between 3500-4000 rpm. It will drop off after that. Provided the formula for horsepower, at 6000 rpm you would need 440 lb-torque to produce 500hp.
Read this article to see what it took to get 530hp from a 347 stroker. Huge roller cam, 10.5 compression which is certainly on the verge of pump gas with the AFR heads, a single plane intake, additional porting, etc. They probably had huge diameter headers and exhaust on this engine which is absolutely critical for high end horsepower, but also zaps low end torque. Look how high they had to rev that thing to get that horsepower. Horsepower = (torque X RPM)/5250.
http://www.enginebuildermag.com/2007/08/the-shermanator-347-a-530hp-gas-stroker-you-can-build/
A realistic, street friendly stroker for a Bronco is going to make 400hp or less at the crank. Keep the .050" duration under 230.