View Poll Results: Renntech or Weistec tune?
Voters: 11. You may not vote on this poll
Poll for a tune: Renntech v. Weistec
MBWorld Fanatic!
Joined: Dec 2003
Posts: 6,279
Likes: 58
From: OC
i drive them all, fast and hard
and with any of the companies i havent seen any convincing real results showing that adding pipes and new turbos on the street is better that tune only, maybe just the dyno
MBWorld Fanatic!
Joined: Aug 2009
Posts: 1,699
Likes: 4
From: Tucson, AZ
C63 AMG
I find still amazing to see that people thinks that just because a tuner has a good reputation and a dealer is "friendly" that you can go ahead and assume that the dealer will cover all the cost of repairs in the vent of a catastrophic failure or related mechanical problems.
Do you guys know how a car dealer operates? They just sell you the car and perform warranty repairs under warranty given that the car is all stock.
Why would a car dealer have to put up for a repair bill for something that the customer choose to modify? in this case a tune.
As far as I know the dealers are privately owned/operated. They must offer, sales, service, parts, paint shop etc but it is not their responsibility to fix your car if you alter it to the point of mechanical failure.
In my opinion, this is a fair game, if you want to play you have to pay. I should have to get upset if the dealer finds out that I blew my cylinder head gasket because I was running too much boost or too lean due to a tune. my .2c
Do you guys know how a car dealer operates? They just sell you the car and perform warranty repairs under warranty given that the car is all stock.
Why would a car dealer have to put up for a repair bill for something that the customer choose to modify? in this case a tune.
As far as I know the dealers are privately owned/operated. They must offer, sales, service, parts, paint shop etc but it is not their responsibility to fix your car if you alter it to the point of mechanical failure.
In my opinion, this is a fair game, if you want to play you have to pay. I should have to get upset if the dealer finds out that I blew my cylinder head gasket because I was running too much boost or too lean due to a tune. my .2c
MBWorld Fanatic!
Joined: Aug 2009
Posts: 1,699
Likes: 4
From: Tucson, AZ
C63 AMG
lol.. you can run faster than that at half throtle. Looking at your numbers it looks like you spun and wasted lots of time on your 60' and 330' then once the car started rolling it picked up speed very quick. Just put some 295 or 305 street soft compound tires and you should be able to run consistent low 11'-mid 11's
MBWorld Fanatic!
Joined: Aug 2009
Posts: 1,699
Likes: 4
From: Tucson, AZ
C63 AMG
I kept blowing my plugs on Weistec tune..And continues to throw 02 sensor codes. I need to get them the exact code so they can tell me whats going on. I think they just forgot to turn off the secondary 02 sensors. And I finally pulled the trigger on the Weistec plugs hoping it would stop burning through plugs.
Myself and a few other tuners believe the tune is a little too aggressive, and that is the reason it keeps burning through plugs. Im waiting for the 2015 CLS63 and will go with AMS. Have had a ton of parts from them including 2 fully built engine (3.8 and 4.0). Eric over there has amazing customer service. Weistec could take some notes..
Oh and my neighbor has a Renntech tuned CLS63 with the same mods on stock plugs and he has never had problems...Just my opinion.
Myself and a few other tuners believe the tune is a little too aggressive, and that is the reason it keeps burning through plugs. Im waiting for the 2015 CLS63 and will go with AMS. Have had a ton of parts from them including 2 fully built engine (3.8 and 4.0). Eric over there has amazing customer service. Weistec could take some notes..
Oh and my neighbor has a Renntech tuned CLS63 with the same mods on stock plugs and he has never had problems...Just my opinion.
Senior Member
Joined: Dec 2006
Posts: 317
Likes: 34
From: LasVegas-Miami-Montana
...
Based on your comments it suggest that perhaps Weistec is using a leaner AFR on their tune and consequently running leaner to squeeze more power... either that or like you said, the o2 sensors feedback is out of whack causing the sparkplugs to run to hot. How often did you replaced the sparkplugs?
Super Member
Joined: Dec 2011
Posts: 921
Likes: 14
From: Edmonton alberta, canada.
Porsche 991 GT3, 2012 cls63 Kleemann K3
i was thinking ams too but their tune says only 630 hp on their site??
thats only 50 hp more than stock on the 2015 cls which is the one im considering.
$3000 for 50 hp?
renntech is 670 hp, so ill probably go with that one.
thats only 50 hp more than stock on the 2015 cls which is the one im considering.
$3000 for 50 hp?
renntech is 670 hp, so ill probably go with that one.
MBWorld Fanatic!
Joined: Aug 2009
Posts: 1,699
Likes: 4
From: Tucson, AZ
C63 AMG
Im pretty sure there off the shelf tunes, but I haven't had a chance to throw it back on the dyno and verify AFRs. Timing could be a little aggressive as well though. I have replaced the plug 3 times, last one was with Weistec's version of the plugs which I believe is 1 step colder. Its only been a month that those are in there. But I have heard nothing but good things when cars come out of there with a custom tune.
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Senior Member
Joined: Dec 2006
Posts: 317
Likes: 34
From: LasVegas-Miami-Montana
...
Thats peak gain bud..Look at the hp/tq graph :-)
Senior Member
Joined: Dec 2006
Posts: 317
Likes: 34
From: LasVegas-Miami-Montana
...
And I have done the plug swaps each time. So it saved me some money, but not time.
Super Member
Joined: Dec 2011
Posts: 921
Likes: 14
From: Edmonton alberta, canada.
Porsche 991 GT3, 2012 cls63 Kleemann K3
Senior Member
Joined: Dec 2006
Posts: 317
Likes: 34
From: LasVegas-Miami-Montana
...
Renntech is a good company, also my neighbor runs the complete package from them. They have 2 different tunes available to purchase..I believe AMS Peak Tq is higher then both those tunes. And Renntechs lower tune is the same Peak HP as AMS...
There are a lot of variables when someone says X car is faster then Z car....All I can say is I trust AMS with there work and knowing they wouldn't put a customer in a bad situation just for numbers...This is coming from someone that has done business with AMS, more then just sending my ECU out to be bench flashed.
I am no way trying to sway anyone to AMS over any other company...I am just speaking from personal experience in general. I think if a tuning device like Cobb, Ecutek, etc could be created then it would benefit us all very much. That would also eliminate a lot of tuning companies that just sell boxed tunes, since we would be able to log ourselves and actually see what is going on..
Aloha,
Will
There are a lot of variables when someone says X car is faster then Z car....All I can say is I trust AMS with there work and knowing they wouldn't put a customer in a bad situation just for numbers...This is coming from someone that has done business with AMS, more then just sending my ECU out to be bench flashed.
I am no way trying to sway anyone to AMS over any other company...I am just speaking from personal experience in general. I think if a tuning device like Cobb, Ecutek, etc could be created then it would benefit us all very much. That would also eliminate a lot of tuning companies that just sell boxed tunes, since we would be able to log ourselves and actually see what is going on..
Aloha,
Will
Former Vendor of MBWorld
Joined: Dec 2011
Posts: 462
Likes: 6
2012 E63 AMG
Super Member
Joined: Dec 2011
Posts: 921
Likes: 14
From: Edmonton alberta, canada.
Porsche 991 GT3, 2012 cls63 Kleemann K3
Renntech is a good company, also my neighbor runs the complete package from them. They have 2 different tunes available to purchase..I believe AMS Peak Tq is higher then both those tunes. And Renntechs lower tune is the same Peak HP as AMS...
There are a lot of variables when someone says X car is faster then Z car....All I can say is I trust AMS with there work and knowing they wouldn't put a customer in a bad situation just for numbers...This is coming from someone that has done business with AMS, more then just sending my ECU out to be bench flashed.
I am no way trying to sway anyone to AMS over any other company...I am just speaking from personal experience in general. I think if a tuning device like Cobb, Ecutek, etc could be created then it would benefit us all very much. That would also eliminate a lot of tuning companies that just sell boxed tunes, since we would be able to log ourselves and actually see what is going on..
Aloha,
Will
There are a lot of variables when someone says X car is faster then Z car....All I can say is I trust AMS with there work and knowing they wouldn't put a customer in a bad situation just for numbers...This is coming from someone that has done business with AMS, more then just sending my ECU out to be bench flashed.
I am no way trying to sway anyone to AMS over any other company...I am just speaking from personal experience in general. I think if a tuning device like Cobb, Ecutek, etc could be created then it would benefit us all very much. That would also eliminate a lot of tuning companies that just sell boxed tunes, since we would be able to log ourselves and actually see what is going on..
Aloha,
Will
but a 90 hp gain seems alot more desireable, so id be going with renntech. and the fact that the guy used to be an AMG engineer doesnt hurt things either.
Senior Member
Joined: Dec 2006
Posts: 317
Likes: 34
From: LasVegas-Miami-Montana
...
like i said, if i couldnt get more than 630 hp from a tune where i already had 580 to begin with, i dont think id bother. not for $3000
but a 90 hp gain seems alot more desireable, so id be going with renntech. and the fact that the guy used to be an AMG engineer doesnt hurt things either.
but a 90 hp gain seems alot more desireable, so id be going with renntech. and the fact that the guy used to be an AMG engineer doesnt hurt things either.
