hamann69

What were the gains?

phatmitzu

I gain none... and about 20 lb tq.

Jakpro1

I learned quick over the last tuning experience, the power of the ECU tune.

Stock ECU must be freaking seeing the ASP boost on there and is doing all kinds of voodoo to adjust (timing etc)

ECU + ASP is best bet. Tunes really coming down in price now to look around when you wanna put on the ASP.

hamann69

I am having the pulley put on tomorrow actually. What do you guys think of the LET Motorsports tune? Its only $600.

MB_Forever

When Shawn dynoed his car with just the ASP pulley, one time the car showed +2 hp gains and the other two times showed -10 and -15 hp losses. Once he flashed the ECU, the car showed 40+ whp on the dyno.

hamann69

Wow the ecu is a must then. Anyone know about the LET ecu? Does it get the job done?

ATKM5

I though it was 40 whp without an ECU tune.... Doesn't it just need time to adopt to the stock ECU???

c32used

Well its not a w211 but I dynoed at the wheel 312 rwhp/314 rwtq with just the ASP pulley thats a +27 rwhp/ +29 rwtq.

MB_Forever

After the ECU upgrade and a new IC pump, I think the car was able to show +40 to 50 whp in gains, but I'll have to check with him to confirm the exact number as I don't remember. But I do remember that the car lost power when we dynoed with pulley and no ECU I think with all the added boost and not enough fuel, the ECU probably pulled timing like crazy until it got tuned.

Zod

from what i recall this has to do with the ''secondary air pump recall flash''
Cars that did not have this might have shown improved dynos with just pulley..but the number of peopel with just pulley and no ecu and losing power seems to be increasing a little. Could be air pump recall and boost do not mix with out tuning!

TopGun32

i have had the recall

and my car is definately has more torque and hp across the RPM.

will a ECU flash or tuning yield more HP and Tq.. You Bet!

But not worth $1200 at this point. If it was around $700 and included a before and after Dyno it would be ideal for local customers but not logical for customers that don't live around the particular tuner.

I'm not much of Dyno numbers guy.. all I can say is that I have driven stock and modded C32 and E55 and I can say and pulley with a nice FM HE runs strong.

How strong.. I don't know, but not really curious to find out.

c32used

There is obviously a problem if you increase boost yet yeild less HP/TQ than stock...

hamann69

How do i know if my car has this problem? My car is a 2003, was there any issue on those?

Fast55

Correct. You won't see an immediate gain by slapping on a pulley. The stock ECU needs time to adapt.

hamann69

How many miles will it take fully adapt. I dont want to dyno to soon after I get the pulley on. Also should I do the ECU reset trick?

Fast55

You can, but figure a couple of hundred miles for it to figure out the pulley. You'll still get more out of it with an ECU tune, but it'll run just fine without it.

ATKM5

Fast55 - Thank you!!! I was getting worried, because I'm planing on doing it myself, and don't want to tune the ECU.

hamann69

I just got the asp pulley installed. The car still drives like stock but you can feel the s/c engage a little more. There is defently a noticeable power increase. I dont know how much but its a pretty big difference. I will be getting my car dynoed tomorrow and ill post up the gains.

MB_Forever

But with the increased boost and not enough fuel, the ECU freaks out and I've seen it pull timing on the dyno in Shawn's car

hamann69

Will see what happens tomorrow when i dyno. It defently feels like i picked up some good power.

MB_Forever

I can't wait, thanks for sharing your results with us....

Fast55

Most cars seem to be a bit rich when stock, so adding boost usually doesn't present a problem with a stock ECU. My first mod was K-1, and without software, the car was fine after a few miles of "learning" the extra boost. Not as good as a full tune + pulley, but a lot of times loosing timing on a dyno is either not enough air and/or heat soak.

Zod

is it heat soak or is it after your car got the secondary air pump recall when sending in you car for some service?
Dealer have to do it mandatory and some of the newer cars have it inbuilt i believe 05-06.

When ECU sees more boost it dumps more fuel... i.e you run richer
For the people making statements that its fine.. do you have dynos other then butt dyno feel?

Also some have debated the ''your car needs a few miles to learn, ECU wise''

what i am trying to say is what you feel, is not always what you get.

Dyno & track are what you should be looking at. Data loging is also very good to do and to get an idea if heat is an issue.

If these are not done then you do not have many facts to look at and make a good analysis on what you are getting, or how it effects your car.

Fast55

This isn't a guess, it's also what happened to my car when I first started modding. Kleemann pulley and no tune on the first runs showed only torque increases, no real HP gains. Dyno's were done at Evosport.

Zod

So you are saying that pulley with no tune is not good. K thanks for the info
Can you tell me what model (year ) your car was please?