Porting, Polishing, and Cams project
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From: Ohio
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From: Des Plaines, IL
C32 AMG
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From: Ohio
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UPDATE:
i dyno'd the car yesterday, here are the numbers. i need to get my graphs scanned so i can post them, but here is what happened before an after the pulley.
Tuesday i dyno'd at 322whp 308wtq
Friday i dyno'd at 335whp 342wtq
so, i gained 13whp and 35wtq.
the torque is impressive, the hp is not...
the car is pulling too much timing up top and i am sure it is because of too much boost and not having the ability to expel the exhaust gases...
also, my IAT's are getting too high with that much boost (1.5 bar), they are hitting the 180 degree range! not good.
i am going to install the Intercooler pump today to see if that helps any, but i doubt it will help that much...
i really think that i need headers on the car to be able to move the exhaust out of the head, it seems like there is too much back-pressure...
i am going to lunch today with the fabricator for the headers, hopefully i can update this with some better news...
i will update this on monday once i get the new I/C pump to let you know if it makes a difference...
i dyno'd the car yesterday, here are the numbers. i need to get my graphs scanned so i can post them, but here is what happened before an after the pulley.
Tuesday i dyno'd at 322whp 308wtq
Friday i dyno'd at 335whp 342wtq
so, i gained 13whp and 35wtq.
the torque is impressive, the hp is not...
the car is pulling too much timing up top and i am sure it is because of too much boost and not having the ability to expel the exhaust gases...
also, my IAT's are getting too high with that much boost (1.5 bar), they are hitting the 180 degree range! not good.
i am going to install the Intercooler pump today to see if that helps any, but i doubt it will help that much...
i really think that i need headers on the car to be able to move the exhaust out of the head, it seems like there is too much back-pressure...
i am going to lunch today with the fabricator for the headers, hopefully i can update this with some better news...
i will update this on monday once i get the new I/C pump to let you know if it makes a difference...
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From: OC
C32
So you went from and EvoSport pulley with 18psi to a LET pulley making 20psi and picked up 13whp and 35wtq? 
Can you explain how 2 more psi gave you 35wtq when going from stock 14psi to the Evo 18psi did not even gain that much and the IAT's would be lower?
Maybe I missed something and I am trying to figure out what.
I think what we have is the inconsistency of the C32 on the dyno. I could take mine back 3 days in a row and get numbers that range 20hp or more.
Can you explain how 2 more psi gave you 35wtq when going from stock 14psi to the Evo 18psi did not even gain that much and the IAT's would be lower?
Maybe I missed something and I am trying to figure out what.
I think what we have is the inconsistency of the C32 on the dyno. I could take mine back 3 days in a row and get numbers that range 20hp or more.
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From: Ohio
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So you went from and EvoSport pulley with 18psi to a LET pulley making 20psi and picked up 13whp and 35wtq?
Can you explain how 2 more psi gave you 35wtq when going from stock 14psi to the Evo 18psi did not even gain that much and the IAT's would be lower?
Maybe I missed something and I am trying to figure out what.
I think what we have is the inconsistency of the C32 on the dyno. I could take mine back 3 days in a row and get numbers that range 20hp or more.
Can you explain how 2 more psi gave you 35wtq when going from stock 14psi to the Evo 18psi did not even gain that much and the IAT's would be lower?
Maybe I missed something and I am trying to figure out what.
I think what we have is the inconsistency of the C32 on the dyno. I could take mine back 3 days in a row and get numbers that range 20hp or more.
there is more boost down lower in the rpm range with a lighter crank pulley to spin which explains the jump in torque. my torque curve is pretty flat now, where as before, it was not...
the higher IAT's explain why i am not making much more power on the top end of the rpm range, but i will fix that...
i do agree with you on the inconsistency of the C32 on the dyno, it seems to be very sensitive on the dyno...i wish that we had a manual mode like the E55, it would make dynoing the car alot easier!
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From: Ohio
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From: Miami, FL
02 C32 AMG sold!
I'll bet you if you run your headers (when done) and nice 3"
single exhaust back w/2 or 3 magna flow resonators I'll bet
you'll drop 2-3psi and make more bottom end hp/tq
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From: Santa Barbara & Los Angeles, CA
C32, Cobra, 700hp Vespa
Erick, does your datalogger allow for street dynoing? I have the autoenginuity setup. I have not tested out the dyno feature. But a magazine last year did a head to head between a real dyno and the autoenginuity software. They found the numbers were almost identical, with only a tiny variance between the two. I want to test it out myself. But if its spot on, I will stick with the software in the future as I garner so much more information while street dynoing.
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From: Philadelphia, PA
2008 A8L, 2002 996TT X50, 2009 X5
Since this is a loss assumption being used to convert back to bhp, the lower the number, the more conservative it is. I thought I'd read on other threads that, if you want to be conservative w/ the C32, assume a 15% drivetrain-loss, if you want to be pretty much dead-on accurate (from what's been observed and recorded w/ actual cars) use 17%. And therefore, presumably, if you want to use an "aggressive" figure to impress your friends, you could use something in the 18-20% range
So, by my math, conservative (15%) would be 394 bhp, a likely more accurate assumption (17%) would be 404 bhp, give or take - and an aggressive *optimistic* (20%) figure would be 419 bhp.
As for Erick's car - I'm anxiously awaiting a "post-headers" dyno run with all these other mods
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From: Houston
C63S
I'm not going to post my numbers yet, but I have picked up 35whp since my visit to the Dynojet earlier this month.
The car feels strong and I enjoy driving it again.
I got a ticket this morning for burning through second gear across an intersection.
Unmarked car!
The car feels strong and I enjoy driving it again.
I got a ticket this morning for burning through second gear across an intersection.
Unmarked car!
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From: Miami, FL
02 C32 AMG sold!
was set standard when Dynojet was popular.
Since this is a loss assumption being used to convert back to bhp, the lower the number, the more conservative it is. I thought I'd read on other threads that, if you want to be conservative w/ the C32, assume a 15% drivetrain-loss, if you want to be pretty much dead-on accurate (from what's been observed and recorded w/ actual cars) use 17%. And therefore, presumably, if you want to use an "aggressive" figure to impress your friends, you could use something in the 18-20% range
loss is almost 1/2 of what it would loose from the engine
through the tranmisssion, driveshaft, differential, axles,
wheels, and tires. Not saying all cars will loose 30% but it's
pretty much close to there.
a proper exhaust (mid pipe and rear exhaust) to go along
with it. Having a aftermarket header and stock exhaust is
having a bottle neck in the system right there.
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From: Boston
2004 C32 ///AMG
the C32 exhaust flows very well as it is...maybe delete a cat and resonator.
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From: Miami, FL
02 C32 AMG sold!
a modified (bigger) exhaust manifold or header, have stock
piping minus the catalyst and resonator? That's like having
C-B-A exhaust when it's suppose to be a D-E-F (increasing
letter, increasing diameter vs A-B-C for stock)
Also take a look at Erick post #531
can get a set of the headers I'll be more than glad to build
a Y pipe 3" exhaust system for his header for the C32 chasis.
This will be made from the same fabricator who built my
exhaust for my M3 Turbo that made almost 500rwhp on pump gas.
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From: Ohio
...
Erick, does your datalogger allow for street dynoing? I have the autoenginuity setup. I have not tested out the dyno feature. But a magazine last year did a head to head between a real dyno and the autoenginuity software. They found the numbers were almost identical, with only a tiny variance between the two. I want to test it out myself. But if its spot on, I will stick with the software in the future as I garner so much more information while street dynoing.
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From: Ohio
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How can you have a proper exhaust system when you have
a modified (bigger) exhaust manifold or header, have stock
piping minus the catalyst and resonator? That's like having
C-B-A exhaust when it's suppose to be a D-E-F (increasing
letter, increasing diameter vs A-B-C for stock)
Also take a look at Erick post #531
Hence why I said I hope he's gonna build a full exhaust. If I
can get a set of the headers I'll be more than glad to build
a Y pipe 3" exhaust system for his header for the C32 chasis.
This will be made from the same fabricator who built my
exhaust for my M3 Turbo that made almost 500rwhp on pump gas.
a modified (bigger) exhaust manifold or header, have stock
piping minus the catalyst and resonator? That's like having
C-B-A exhaust when it's suppose to be a D-E-F (increasing
letter, increasing diameter vs A-B-C for stock)
Also take a look at Erick post #531
Hence why I said I hope he's gonna build a full exhaust. If I
can get a set of the headers I'll be more than glad to build
a Y pipe 3" exhaust system for his header for the C32 chasis.
This will be made from the same fabricator who built my
exhaust for my M3 Turbo that made almost 500rwhp on pump gas.
i am going to do a full exhaust setup on the car at some point, just trying to take it one step at a time...
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Posts: 6,213
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LET C32 2002
$125 and traffic safety school....so the LET is costing you more then expected now....glad your car is running better.
