Dyno 2000 Camshaft Possibilities For 396

[Grumpy]

it was for some guys t-bucket, I helped him build about 12-15 years ago,
and hes never done much with it other than, impressive burn outs,
at a few car shows, but he wanted to have a scary fast car,in that we succeeded
he won,t race it as its almost uncontrollable,
due to the cars suspension is not set up properly, no roll bars etc.
he has a ford 9" differential, 3.90 gears, a muncied 4 speed and a 24 lb aluminum flywheel
and a low rise dual quad intake, the car probably makes over 570 hp but hes never raced it or had it dyno-ed

 

[T-Test]

it was for some guys t-bucket, I helped him build about 12-15 years ago,
and hes never done much with it other than, impressive burn outs,
at a few car shows, but he wanted to have a scary fast car,in that we succeeded
he won,t race it as its almost uncontrollable,
due to the cars suspension is not set up properly, no roll bars etc.
he has a ford 9" differential, 3.90 gears, a muncied 4 speed and a 24 lb aluminum flywheel
and a low rise dual quad intake, the car probably makes over 570 hp but hes never raced it or had it dyno-ed

Smart guy!! Death can come quick when you go crazy with HP. Wild Willy Borsch comes to mind for a full tilt T-Bucket. Buckle up and hang on and try to keep between the rails!!

 

[Indycars]

I'll try to get this done tomorrow, sorry for the delay!

RICK
I've used a roller BBC cam, in a similar BBC in the past,
in a serious 13.5:1 compression 427,BBC
a crane 138631

https://www.summitracing.com/parts/crn-138631
you can use this as seat timing
in 45-79
ex 93-39
seat timing
why not try that and see if the software likes that better?

 

[Indycars]

Ok, so here is the latest sim, the only change was going to the Crane 138631 camshaft and raising
the SCR by a 1/2 point to 13.5:1 . Still using a 200 HP shot of Nitrous.


.

 

[Grumpy]

first RICK, THANK YOU


I have too point out that power plot .... well...
obviously somethings fishy/hinky with the software or the data,
you don,t or at least should never get a prediction I.E. torque curve and power band that looks like that

https://www.cjponyparts.com/resources/how-to-read-a-dyno-graph

https://dsportmag.com/the-tech/learning-curves-recognizing-a-race-friendly-dyno-graph/

https://www.team-integra.net/forum/blogs/surferx/131-hp-torque-analyzing-power-curves.html

http://www.pencilgeek.org/2009/09/exposing-dyno-cheaters-how-the.html

https://www.hotrod.com/articles/hrdp-0401-torque-horsepower-guide/

The relationship of horsepower and torque

1 HP= 550 lb-ft per second.

HP is directly related to torque with respect to time. To put it into terms we can actually use, we can convert that second into an engine RPM value. One revolution would be equal to the circumference of a circle (2pi)r, "r" being a radian or one revolution, and one minute would be equal to 60 seconds.

550 lb-ft/[(2pi)r/60]= 5,252r

And the resulting equation to convert lb-ft (torque) with respect to RPM to lb-ft per second (HP) ends up being:

HP = (Torque x RPM) / 5252

Engrave this equation into your head. Note that dynomometers only measure torque, they do not measure horsepower. The horsepower curve is purely a calculated value using the above equation.

dyno syms should look more like these below

 

[Indycars]

I have too point out that power plot .... well...
obviously somethings fishy/hinky with the software or the data,
you don,t or at least should never get a prediction I.E. torque curve and power band that looks like that

The only reason I have to offer at this time, is the fact the Nitrous is added at ALL rpm's. I
suggested that a parameter for the rpm to start Nitrous injection be added. Larry Atherton
said it has been on his list of things to do and maybe now was the time.

If you can give me a more detailed explanation of what you see is wrong, I can pass that on
to Larry. I've mentioned that I have had negative comments about my sim graphs from knowledgeable
people and he wanted to know what was said, so he does seem to be concerned.

Thanks!

 

[Grumpy]

its got zero to do with you RICK, its something in the way the software is posting the torque curve chart
hp is simply the conversion of torque vs rpm

torque x rpm divided by 5252 = horse power
HP = (Torque x RPM) / 5252

in that chart , you show hp dropping from about 740hp at 3000 rpm,
to about 400 hp at 4300 rpm


400 ft lbs at 3000 rpm= 228 hp 350 ft lbs at about 4300 rpm=286 hp

 

[Indycars]

400 ft lbs at 3000 rpm= 228 hp 350 ft lbs at about 4300 rpm=286 hp

Wow, that's right! I'm emailing Larry Atherton shortly.

 

[Indycars]

400 ft lbs at 3000 rpm= 228 hp 350 ft lbs at about 4300 rpm=286 hp

No, that's not right.

That's 730 ft/lbs at 3000rpm, which equals 417 HP ..... the red line is HP.

 

[Grumpy]

what ever the chart shows you have to agree its a bit odd, and out of place, at best!

 

[busterrm]

I have it at 522 tq @ 5000 and 564 hp at 6500.

 

[Grumpy]

that 522 tq @ 5000 and 564 hp at 6500.
certainly seems to be a more logical and closer to reality expectation.