The Ford Barn

Purdy Swoft · 08-26-2011, 12:22 PM

Actually the the low end performance or torque is very good. The intake duration is 255 the exhaust duration is 252 . No doubt many like this grind . The last I looked at Bills site it was listed as The most popular regrind. I haven't looked at the site lately but I am well pleased with my cam. I have no agenda here. Anyone can do as they please, my lifetime experience is that the 3.78 gear ratio is best suited for the model A. My model A's are only fun cars and fullfill all of my expectations.

Richard Lorenz · 08-27-2011, 09:39 AM

Three cheers for the people who run dyno tests and share their results. Regarding torque versus horsepower, my guess is that the torque results are for the serious engine people, and horsepower is for bragging.

There are a couple of things that might account for different results observed by different people, and maybe results by the same person. One is that engine temperature never seems to be reported, and might not even be controlled or measured. Another is that with Model A tests, the timing is usually set at a fixed position for the entire run-up. This means that maximum performance is being measured only for the RPMs where the timing is optimum.

hardtimes · 08-27-2011, 03:02 PM

Richard,
'one is that engine temp never seems to be reported'...
I read the charts/stats/comments that were provided. One thing what stuck out, to me, is that the dyno tests were done at a CONSTANT temp..i.e.- 180!
Got me to wandering if I shouldn't take out my 160 stat and put in 180 ? My gut tell me that if my engine is running 180 (as in dyno tests done), that my engine will operate more efficiently, etc.... i.e.- wear more evenly, burn fuel more evenly, use oil more evenly(less polution in oil) ???

John S · 08-27-2011, 11:14 PM

Quote:

Originally Posted by pat in Santa Cruz

I don't know if an Aries muffler "adds" 10 HP when compared to an original Ford muffler. I think the cheapo repo commonly found on an A took it away in the first place. With an old rusty repo muffler, I suspect the engine loses even more HP due to clogged baffles.

You are quite right about the Aries muffler. I have seen Dennis run this test, and the muffler used was one of the repros that haven't been made for a few years.

Bassman/NZ · 08-28-2011, 12:09 AM

Quote:

Originally Posted by hardtimes

Richard,
'one is that engine temp never seems to be reported'...
I read the charts/stats/comments that were provided. One thing what stuck out, to me, is that the dyno tests were done at a CONSTANT temp..i.e.- 180!
Got me to wandering if I shouldn't take out my 160 stat and put in 180 ? My gut tell me that if my engine is running 180 (as in dyno tests done), that my engine will operate more efficiently, etc.... i.e.- wear more evenly, burn fuel more evenly, use oil more evenly(less polution in oil) ???

Most old engines run best at around 180-185.

Bruce,Upstate NY · 08-28-2011, 12:48 PM

Sponsored Links (Register now to hide all advertisements)

On these very interesting dyno tests, what is the difference between corrected and uncorrected horsepower?

hardtimes · 08-28-2011, 01:38 PM

Bassman,
I believe that you are correct! As my B tends to run a 'little' cool anyway (new rad/new pump/new block) I feel that she is not running maximum efficiency. Going to a 180, can't do but help IMO.

08-26-2011, 12:22 PM	#21
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: A closer look at dyno data: what gives the most bang for the buck? Actually the the low end performance or torque is very good. The intake duration is 255 the exhaust duration is 252 . No doubt many like this grind . The last I looked at Bills site it was listed as The most popular regrind. I haven't looked at the site lately but I am well pleased with my cam. I have no agenda here. Anyone can do as they please, my lifetime experience is that the 3.78 gear ratio is best suited for the model A. My model A's are only fun cars and fullfill all of my expectations.

08-27-2011, 09:39 AM	#22
Richard Lorenz Senior Member Join Date: May 2010 Posts: 447	Re: A closer look at dyno data: what gives the most bang for the buck? Three cheers for the people who run dyno tests and share their results. Regarding torque versus horsepower, my guess is that the torque results are for the serious engine people, and horsepower is for bragging. There are a couple of things that might account for different results observed by different people, and maybe results by the same person. One is that engine temperature never seems to be reported, and might not even be controlled or measured. Another is that with Model A tests, the timing is usually set at a fixed position for the entire run-up. This means that maximum performance is being measured only for the RPMs where the timing is optimum.

08-27-2011, 03:02 PM	#23
hardtimes Senior Member Join Date: May 2010 Location: South California Posts: 6,188	Re: A closer look at dyno data: what gives the most bang for the buck? Richard, 'one is that engine temp never seems to be reported'... I read the charts/stats/comments that were provided. One thing what stuck out, to me, is that the dyno tests were done at a CONSTANT temp..i.e.- 180! Got me to wandering if I shouldn't take out my 160 stat and put in 180 ? My gut tell me that if my engine is running 180 (as in dyno tests done), that my engine will operate more efficiently, etc.... i.e.- wear more evenly, burn fuel more evenly, use oil more evenly(less polution in oil) ??? Last edited by hardtimes; 08-27-2011 at 03:04 PM. Reason: add..

08-28-2011, 12:48 PM	#26
Bruce,Upstate NY Senior Member Join Date: May 2010 Location: Odessa, NY Posts: 385	Re: A closer look at dyno data: what gives the most bang for the buck? Sponsored Links (Register now to hide all advertisements) On these very interesting dyno tests, what is the difference between corrected and uncorrected horsepower?

08-28-2011, 01:38 PM	#27
hardtimes Senior Member Join Date: May 2010 Location: South California Posts: 6,188	Re: A closer look at dyno data: what gives the most bang for the buck? Bassman, I believe that you are correct! As my B tends to run a 'little' cool anyway (new rad/new pump/new block) I feel that she is not running maximum efficiency. Going to a 180, can't do but help IMO. Last edited by hardtimes; 08-28-2011 at 01:40 PM. Reason: ad..