[JSH]

Originally Posted by Camaro1973

You don’t need e85 or 93 with meth.

This is on 93 w/ roughly 14lb boost.

This dyno jet uses an unspecified SAE correction factor whereas Hennessy uses the standard SAE correction factor

[danhr]

Granted this is an A8, but this will give you some food for thought

LT1: SAE certified at 455 hp at the flywheel. Go google what SAE certified means, if you dont already know.

396 rwhp baseline.... ok so we are looking at 12.96% drivetrainloss... ok cool

Throw bolt ons on... we are now at 480 rwhp. Drivetrain loss is the same.. only did engine work. A little basic algebra would ballpark us at 551 flywheel horsepower

Next we install a converter... fun stuff happens. Now at 460 rwhp. Didnt do any engine work... so we are still at 551 hp at the flywheel. Again... some basic math here will show a 16.5% drivetrain loss.

Did I mention this converter was locked up as well?

[Camaro1973]

Originally Posted by JSH

This dyno jet uses an unknown SAE correction facture factor whereas Hennessy uses the standard correction factor

LOL what! That is the dumbest thing i've ever heard on here. I'm sure you can call them to give you the science behind their dyno.. lol. Between you and ZX-10 you should both become salesman for henneseey and elite engineering.


And BTW Hennessey is one of the ones who posts their dyno numbers in STD... unreal.

[Flexhorn]

I’m at 824 Rwhp. I have Rotofab, cam, headers, lower pulley, 2650, 103 TB, and I replaced the rear axles with 1500hp rated. I’m on 93.

[JSH]

Originally Posted by Camaro1973

LOL what! That is the dumbest thing i've ever heard on here. Between you and ZX-10 you should both become salesman for henneseey and elite engineering.

SAE:
"SAE (Society of Automotive Engineers), USA. Power is corrected to reference conditions of 29.23 InHg (99 kPa) of dry air and 77 F (25°C). This SAE standard requires a correction for friction torque.

STD:
STD is Another power correction standard determined by the SAE. Power is corrected to reference conditions of 29.92 InHg (103.3 kPa) of dry air and 60 F (15.5°C). Because the reference conditions include higher pressure and cooler air than the SAE standard, these corrected power numbers will always be about 4 % higher than the SAE power numbers. Friction torque is handled in the same way as in the SAE standard."

The first problem with quoting SAE is that there are at least 3 different SAE testing procedures but Dynojet does not distinguish them. The new SAE J2723 is actually not a new set of correction factors, it is simply a new procedure for using the existing factors (J1349 and J1995) used by automotive manufacturers but likely not by performance shops.

[Camaro1973]

Originally Posted by JSH

SAE:
"SAE (Society of Automotive Engineers), USA. Power is corrected to reference conditions of 29.23 InHg (99 kPa) of dry air and 77 F (25°C). This SAE standard requires a correction for friction torque.

STD:
STD is Another power correction standard determined by the SAE. Power is corrected to reference conditions of 29.92 InHg (103.3 kPa) of dry air and 60 F (15.5°C). Because the reference conditions include higher pressure and cooler air than the SAE standard, these corrected power numbers will always be about 4 % higher than the SAE power numbers. Friction torque is handled in the same way as in the SAE standard."

The first problem with quoting SAE is that there are at least 3 different SAE testing procedures but Dynojet does not distinguish them. The new SAE J2723 is actually not a new set of correction factors, it is simply a new procedure for using the existing factors (J1349 and J1995) used by automotive manufacturers but likely not by performance shops.

This here "The first problem with quoting SAE is that there are at least 3 different SAE testing procedures but Dynojet does not distinguish them."


Is complete nonsense. What you posted above is exactly the conditions that are corrected when SAE/STD are used on a dyno.