///AMG4EVER

Yesterday, I did 3 Dynojet runs at Hennessey Performance. My numbers were: 362.37, 349.83 (2 minutes later) & 357.86 rwhp; and 340.27, 341.91 & 344.22 rwtq accordingly. My printed out graphs are not the same as the ones given to me in a CD... I'm missing something here using the dynojet software to get to 362.37. First attempt:



Mr. Hennessey himself told me to consider a 19-20% drivetrain loss... which equates to 440-450 HP at the crank... not too bad for a 5 year old car with 101,000 miles...

I'm not a dyno expert but Dynojets are supposed to be optimistic. I'm very happy with the car overall; power is very linear and consistent. The correction factor used was by SAE: .99; temperature ranged in the mid 60s and humidity was about 12%. Pulls were done on dyno mode, 3rd gear and over 3,500 rpm punch.

I'm going to the track this weekend if the rain lets me (I tried Sunday) so I'm hoping to at least get a decent 12.7-12.8 run.

sales@eurocharged.com

Good job man!

boohooramblers

Nice numbers man! What mods do you have (can't remember!).
Did you get to monitor the AFR also?

[Edit] - sorry - I see you have Renntech mods!

///AMG4EVER

Oh, forgot to list the current mods. Pretty straight forward stuff:

Performance:
Renntech Pulley & ECU
Full 55 Intake Setup (Boxes & Splitter)
K&N Filters
Resonator Delete

Cooling:
LET FMIC Heat Exchanger
Johnson CM30 Pump
Phenolic Spacers

I'm not sure if the sprint booster is consider a performance mod but I have it as well.

Thanks to all of you guys for the usual help and advice.

neihouma

Good lord now I CAN'T WAIT till I dyno my C32 on the dynojet

What fans did the shop used?

Congrats Carlos!

///AMG4EVER

I did monitor my AFR... here is a graph for that same run:

neihouma

I recall and noticed you still haven't changed your spark plugs
and wires!

///AMG4EVER

Thanks Rey. It was a small cheap blower, brand was Sanitaire. Looking forward for your dynojet results as well!

neihouma

I couldn't make it yesterday, the SRT4 that was being dyno
tuned hogged up the dyno. Going back Monday. Those fans
PUSHES alot MORE air than the fan used in my dynojet:



ALSO have the fan hitting the heat exchanger! That's why
the car is running rich! The HE isn't getting any air so the
IAT IS OFF THE ROOF!

///AMG4EVER

Thanks for the input Rey. I'm going to keep that in mind for next time. And no, I haven't change the spark plugs & wires yet.

I took the name and number of the operator to make sure next time we simulate the procedure as close as possible. The people at HPE were really nice and professional, I was sorrounded by 1000 hp snakes.

430

Nice numbers.

One point our cars do not suffer from 19%-20% drive train loss. It is more in the 16%-17%.

neihouma

Stock C32 349HP & 332TQ

Loose 17% and you get 289.67rwhp & 275.56rwtq

NOW multiply that by 1.17 you get 338.91HP & 324.74TQ

NOW multiply that by 1.21 you get 350.50HP & 333.42TQ

MB_Forever

Very impressive numbers. You're car is running really strong. You need to hit the tracks as soon as you can, I garauntee you'll see upper to mid 12 seconds

///AMG4EVER

Thanks man - your E63 is launching crazy fast... 3.9 seconds are supercar specs!

I'll do my best to go this weekend.

MB_Forever

At one point, my C32 was putting down 335 whp and I still was able to pull 12.7 seconds at 109 mph, I'm confident, you'll be able to hit 12.5 with a good launch and maybe even better

MRAMG1

Hey there neihouma:

I would HARDLY call 13.0-13.5 A/F ratio RICH for a forcedinduction engine. IF anything, I would same thats as LEAN as I would won't to go. I ran my 5.0 race car with a whipple around 12.0. Keep in mind that 14.6 is perfect real world conditions, but almost EVERY race car runs ALOT less than this for power and safety factors.

I would say that WHOEVER did his tune, DID ONE GREAT JOB ON HIS ECU

See yeah

PS: GRAET numbers!!!

neihouma

You're right, I didn't look at the chart correctly, but when
Carlos dynoing his car at WOT on 3rd gear to 105mph and
no air hitting the heat exchanger would make the car run
rich because the coolant in the aftercooler between the
supercharger and engine is hot beyond specs, making the
car run rich just in case.

But in the graph DOES show it's running lean, my C32 is
running consistant low 12's in AFR.

MRAMG1

No sweat neihouma

Thats what we are all here for my friend, and your right about the air blower

See yeah

c32AMG-DTM

I get your initial conversion (assume 349 crank hp to be accurate, so if stock rwhp dyno figure is high 280s, you're looking at 17% driveline loss), but I don't get the following multiplication factors you're using.

If AMG4EVER's looking to ballpark crank hp, he just needs to take actual rwhp and divide by 1-driveline loss (that is, 0.83). 362/.83 = 436 hp at the crank, roughly. Not too shabby for a Stage I (or I+ maybe?) C32...

DarkXerox

You want to multiply 349 by .79 (21% loss), then divide the subsequent dyno level by .79 to get the approximate crank hp? So 362rwhp should be like 458hp. His estimates were right. That's pretty sick though, basically a little under what the W211 E55 was rated at.

neihouma

Something I learn in the mid 90's. If anyone from South Florida I learned
this multiply ratio from Maximum Performance, Victor and his brother. Now
the shop is South Florida Performance, I forgot how it was said but it was
explained to me once and I accepted it.

///AMG4EVER

The real dyno will be at the track. Hopefully Erick will come along so he can drive the car as well... I've only been to the track once... 13.2 @ 109 was my best run with RT ECU and green filters. If I shave .5 seconds out of that time, I'll be extremely happy. Maybe it's too optimistic so we'll see.

I've also concluded that if you want to feel good about the car, no matter what mods you have, then dyno it on a cold day.

If you see all the correction factors this software has, some of them takes you to 378 rwhp, lol... I guess from a selling stand point that's something you can brag about...

///AMG4EVER

This is what I did but with 19-20%... (.81-.80). It really doesn't matter as long as I can break into the 12s.

c32used

Great numbers!

If I was able to do 13.29@105.89 in stock form with Magnecor wires, Denso IK20 Iridium plugs and Green filters at 299 RWHP/290 RWTQ with Dunlop Sport SP 8000 235/45/17 all around I don't see a reason why you couldn't hit low to mid 12s with essentially 60 RWHP more then me. Unless your weather and elevation really hold your car back.

I feel with just the ASP pulleys I can pull mid to high 12s now but since Evotech is reflashing my ECU I feel with getting larger Heat Exchanger and Larger Cap Johnson CM30 pump installed maybe low to mid 12s now.....can't wait til Spring for private drag race session with the usual suspects....

If the new Kumho Ecsta don't put me in the low 12s I feel the Nitto 555R will..

c32used

I mentioned the larger heat exchanger and higher flow Johnson pump cause they will keep car way cooler providing me with more power longer..