View Poll Results: do you have a tune with your pulley
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Pulley with or without ECU tune poll
Thread Starter
MBWorld Fanatic!
Joined: Jan 2007
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From: PA
S600, GL450, GLC 43
Pulley with or without ECU tune poll
Okay guys:
How many guys have a pulley on their cars with or without a ECU tune. I firgured that MNAY people here, including myself have been asking this question so lets find out. Mine is without a tune and loving it
See yeah
How many guys have a pulley on their cars with or without a ECU tune. I firgured that MNAY people here, including myself have been asking this question so lets find out. Mine is without a tune and loving it
See yeah
Super Member
Joined: Jul 2006
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From: FT POLK LOUISIANA
1992 Toyota Corolla, 1994 Chevy C1500, 2002 C32, 2012 Prius, 2013 Toyota Sienna
I have an ASP pulley with a Speedtuning ECU tune. Im not to sure what the ECU is doing for me though. I have a plan to find out. Im getting a new stock ECU (hopefully) and am going to DYNO/ and drag to compare the two. With all my mods I gained 30 RWHP and 30 lb/ft torque.
Super Member
Joined: Jul 2006
Posts: 925
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From: Maine
Not an AMG :(
, but without getting off topic, I think the question should be:"Does your pulley require an ECU tune?"
Again, I'm not trying to hijack the thread, but it would be kinda irresponsible for noobs to check this thread out and think having a pulley only is fine. In many cases it may be just fine. However, we should put the proof into this thread also. Just my 0.02
So..for those of you with pulley's and no ECU tune, can you please comment as to what datalogging you have to conclude that the pulley is safe on its own?
Thread Starter
MBWorld Fanatic!
Joined: Jan 2007
Posts: 3,342
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From: PA
S600, GL450, GLC 43
MRAMG1 - Your question is a very good one , but without getting off topic, I think the question should be:
"Does your pulley require an ECU tune?"
Again, I'm not trying to hijack the thread, but it would be kinda irresponsible for noobs to check this thread out and think having a pulley only is fine. In many cases it may be just fine. However, we should put the proof into this thread also. Just my 0.02
So..for those of you with pulley's and no ECU tune, can you please comment as to what datalogging you have to conclude that the pulley is safe on its own?
, but without getting off topic, I think the question should be:"Does your pulley require an ECU tune?"
Again, I'm not trying to hijack the thread, but it would be kinda irresponsible for noobs to check this thread out and think having a pulley only is fine. In many cases it may be just fine. However, we should put the proof into this thread also. Just my 0.02
So..for those of you with pulley's and no ECU tune, can you please comment as to what datalogging you have to conclude that the pulley is safe on its own?
See yeah
Super Member
Joined: Oct 2007
Posts: 830
Likes: 1
From: New Hampshire
2003 C32 AMG, 2003 E39 M5
Thanks for doing this 
I have been wondering this myself
I have been wondering this myself
Super Member
Joined: Oct 2007
Posts: 830
Likes: 1
From: New Hampshire
2003 C32 AMG, 2003 E39 M5
Same here I was told the 172mm and 178mm do not change the A/F enough to change the pulley.
There is one remember that has a Reentech for sale where he mention just doing the Rentech pulley with no ecu tune took him from 12/1 to like 11.5/1. Not positive on the numbers maybe he can comment and has a dyno sheet.
There is one remember that has a Reentech for sale where he mention just doing the Rentech pulley with no ecu tune took him from 12/1 to like 11.5/1. Not positive on the numbers maybe he can comment and has a dyno sheet.
Although I agree with you whole hardily, I have had SEVERAL respectable authorities from this site, HINT HINT please come forward guys, inform me that it is INDEED okay. But, just to be on the safe side, I would LOVE to see data logging on a NON tuned car showing the A/F ratio
See yeah
See yeah
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MBWorld Fanatic!
Joined: Aug 2005
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From: Southern Cali (Ontario)
welll... its all on the size of pulley..
I used to have the evosport ODPS.. and without an ECU it ran really well.. but it was not as aggressive..
pulley and ECU should be together, BUT not at the prices we are paying. Therefore I would advise against it.
In my e55, I should get a tune for the over size pulley from ASP. But with a larger FMIC I'm able to deal with the high ITA's but not properly running full potential. I'm probably leaving another 15RWHP at the table.
The ECU for me would have to help with unlocking more power, not necessarily creating more power.
I wish we had a Split Second Turbo Tuner application or Proceded, Xede, where one can install and uninstall at will. I just dont feel comfortable with ECU flashes.
I would suggest larger pulley and FMIC before going the ECU route, speciall in the south western states.. where heat is an issue.
I used to have the evosport ODPS.. and without an ECU it ran really well.. but it was not as aggressive..
pulley and ECU should be together, BUT not at the prices we are paying. Therefore I would advise against it.
In my e55, I should get a tune for the over size pulley from ASP. But with a larger FMIC I'm able to deal with the high ITA's but not properly running full potential. I'm probably leaving another 15RWHP at the table.
The ECU for me would have to help with unlocking more power, not necessarily creating more power.
I wish we had a Split Second Turbo Tuner application or Proceded, Xede, where one can install and uninstall at will. I just dont feel comfortable with ECU flashes.
I would suggest larger pulley and FMIC before going the ECU route, speciall in the south western states.. where heat is an issue.
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Super Member
Joined: Oct 2007
Posts: 830
Likes: 1
From: New Hampshire
2003 C32 AMG, 2003 E39 M5
Can someone post some dyno results of their C32 after installing just a pulley and no ecu tune? I think stock stock A/F is 12 to 1. I would be curious to see how much just the pulley changes the A/F ration with facts from a dyno report.
Thanks
Thanks
Thread Starter
MBWorld Fanatic!
Joined: Jan 2007
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From: PA
S600, GL450, GLC 43
Come on and step up, strap on a set and POST IT
see yeah
Senior Member
Joined: Jun 2007
Posts: 277
Likes: 1
From: Lafayette, IN
C32
im running a renntech pulley with no tune. havent had any problems with it. at the begining of the pull the afr is around 12.8-12.9 as i rolled into the throttle and it got richer thoughout the run ending at 11.7-11.8 @ 6100rpm. made peak tq at 4300rpm and peak hp at 5500rpm. i vote no tune with just a pulley. thats just my opinion on that. brett
Last edited by mustang281man; Mar 6, 2008 at 04:31 PM.
Thread Starter
MBWorld Fanatic!
Joined: Jan 2007
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From: PA
S600, GL450, GLC 43
im running a renntech pulley with no tune. havent had any problems with it. at the begining of the pull the afr is around 12.8-12.9 as i rolled into the throttle and it got richer thoughout the run ending at 11.7-11.8 @ 6100rpm. made peak tq at 4300rpm and peak hp at 5500rpm. i vote no tune with just a pulley. thats just my opinion on that. brett
Thats just the information that the DOCTOR
was looking for.See yeah my friend
Senior Member
Joined: Jun 2007
Posts: 277
Likes: 1
From: Lafayette, IN
C32
hey no problem. i see you used to have a stang. i have a procharged fox drag car. gotta love fox bodies.
Super Member
Joined: Oct 2007
Posts: 830
Likes: 1
From: New Hampshire
2003 C32 AMG, 2003 E39 M5
Brett thanks for doing this I told you it would be appreciated
im running a renntech pulley with no tune. havent had any problems with it. at the begining of the pull the afr is around 12.8-12.9 as i rolled into the throttle and it got richer thoughout the run ending at 11.7-11.8 @ 6100rpm. made peak tq at 4300rpm and peak hp at 5500rpm. i vote no tune with just a pulley. thats just my opinion on that. brett
Thread Starter
MBWorld Fanatic!
Joined: Jan 2007
Posts: 3,342
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From: PA
S600, GL450, GLC 43
Oh yeah, stock it was a 14.3 with EVERY bolt on known to mankind
added the whipple 13.3, nothing else
removed the cats 12.8
Changed heads AFR 12.3
Again, not bad for a raod racer running 800 lb front springs.
See yeah
PS: Thanks for everyone's posts
. So I figure we can ALL take it as safe to run without a tune, but you get a little more with one. For the $1500 bucks, I'll keep my computer stock for now. Case closed
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
i ran it without the tune for a couple months. the car felt sluggish into the high rpms. after the tune it worked as it suppose to be. i never made a stock dyno, but after the pulley and ecu I made 353 on dynapack on around 78 degree day. and I had the 55 y-splitter when i did it.
MBWorld Fanatic!
Joined: Feb 2006
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LET C32 2002
To tune or not to tune??
I had both done and with just the pully it was fine and dyno back then showed my A/F within safe range under 13s. Now I wanted the ECU to run at uptimum so it required a tune. My A/F was a little better and definitely felt the addon of power to the wheel...Alot of people have this notion that a pulley and ECU tune will hail us 50-100 rwhp but it don't and many get dissappointed when one input results...we at times forget we have a family sedan and think this car should be like a modded american car with tons of hp but at the end of day its a Benz with costly upgrades...Thanks to the LET's and Code3performance for making modds more affordable..
I had both done and with just the pully it was fine and dyno back then showed my A/F within safe range under 13s. Now I wanted the ECU to run at uptimum so it required a tune. My A/F was a little better and definitely felt the addon of power to the wheel...Alot of people have this notion that a pulley and ECU tune will hail us 50-100 rwhp but it don't and many get dissappointed when one input results...we at times forget we have a family sedan and think this car should be like a modded american car with tons of hp but at the end of day its a Benz with costly upgrades...Thanks to the LET's and Code3performance for making modds more affordable..
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
To tune or not to tune??
I had both done and with just the pully it was fine and dyno back then showed my A/F within safe range under 13s. Now I wanted the ECU to run at uptimum so it required a tune. My A/F was a little better and definitely felt the addon of power to the wheel...Alot of people have this notion that a pulley and ECU tune will hail us 50-100 rwhp but it don't and many get dissappointed when one input results...we at times forget we have a family sedan and think this car should be like a modded american car with tons of hp but at the end of day its a Benz with costly upgrades...Thanks to the LET's and Code3performance for making modds more affordable..
I had both done and with just the pully it was fine and dyno back then showed my A/F within safe range under 13s. Now I wanted the ECU to run at uptimum so it required a tune. My A/F was a little better and definitely felt the addon of power to the wheel...Alot of people have this notion that a pulley and ECU tune will hail us 50-100 rwhp but it don't and many get dissappointed when one input results...we at times forget we have a family sedan and think this car should be like a modded american car with tons of hp but at the end of day its a Benz with costly upgrades...Thanks to the LET's and Code3performance for making modds more affordable..
probably more like 60rwhp at most along with the intake mods.
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LET C32 2002
Maybe 60 RWTQ but RWHP nowhere near as much unless you add headers and maybe maybe full intake....If we go by my initial stock dyno with dirty K&N filters then I gained 35-37 RWHP but 38-40 RWTQ with pully and ECU tune. This includes the Y splitter, Magnecor wires and Denso plugs...
Super Member
Joined: Jul 2006
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From: FT POLK LOUISIANA
1992 Toyota Corolla, 1994 Chevy C1500, 2002 C32, 2012 Prius, 2013 Toyota Sienna
I went from an 11.6 A/F ratio at WOT to a 12.5 A/F ratio at WOT with ECU tune. Does that sound OK? ( Newb ?) When we say a car is running rich does that mean rich with fuel or air. Thanks.
Last edited by mdncn2762; Mar 9, 2008 at 09:38 AM.
Senior Member
Joined: Jun 2007
Posts: 277
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From: Lafayette, IN
C32
11.6 is richer than 12.5. the lower the number the richer the air fuel mixture is.
Thread Starter
MBWorld Fanatic!
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Posts: 3,342
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From: PA
S600, GL450, GLC 43
Anyway, keep in mind rich is safe, lean is KABOOM!!!
See yeah
PS: I ran my blown road racing stang around 11/1 just for this reason, okay, also because it did NOT have an intercooler.
