you should probably send him an email...

 

HI,I was told the same thing also by others,,even on this site..Now my curve is more linear and longer,,,a little less fun feeling now without that big hit...lol...PM me and we can talk......

 

Wouldn't breaking a rod be a bigger risk in a 6-speed?

I guess its a bit different because I have a tiptronic, but I do not hit full boost (1.6 bar) in first gear, and barely in 2nd gear...so by the time I am in 3rd gear or above, my RPMs are already plenty high, and I do not lose boost in between shifts.

 

I would think in general you would have more load because with an automatic trans,Tips would fall in that also....Because of the gearing in most cases is not as efficent and you have some type of torque converter link which would put more stress/load on an engine also.....IMO..

 

I agree that is not as efficient, so a tiptronic will produce less power than a manual, but I am not sure why it would create more load. The tuner is going to tune the car so the load is acceptable, independent of the tranny.

With you 6speed, you go from 0 to full boost in each gear, so you get a lot more hits...

 

I see your point....,,, But you do not tune the map for each individual gear,,,,So,usaually,a automatic has longer gear ratios and/OR farther spacing of the ratios,,thus puts more load on the turbo to boost quicker...

 

Load is a variable that you do not tune. Load is uh.. load???

The motor is still making the same TQ on the engine regardless of what transmission. The transmission choice just what eats up power you see at the rear wheels. 6speeds are like an automatic in the fact how much boost you will make in what gear. With my GTX35's I make 12psi-14psi in 1st on a track pass... ~25psi in 2nd and full tilt 30psi in 3rd and up. Now if I'm on the street and roll into 2nd at low RPM I'll hit 30psi because there is more load because I'm throwing all of it at 3-4k RPM vs quickly going into 2nd gear and being at 5k+ RPM.

There is a lot of factors that can bend rods. Bringing power/torque in at a super low RPM can cause damage. When I was stock motor on both my EPL tune and BL/TC Standalone we killed torque as much as we could to prevent the motor from imploding. I think on a few pulls at higher boost we saw close to 800rwtq on a Dynojet. That portion of the map was neutralized (guess that's the word) so we could keep the torque in the low 700 area. I had 6k+ miles on that setup before the motor came out when the transmission decided to blow away 3rd gear. There are a lot of things we learned with my build and other shops know the same. You can only push a motor so far and I was very fortunate I didn't kick a rod or anything. I knew from the start making the power I was that it could end badly if certain things happened. But I was very lucky they didn't.

 

Here's the dyno sheet of the car.

 

wow the A28 give torque early....

 

That was the worst of the six rods, but bent so far that it forced the pin sideways on the piston and popped the circlip out on one side. then the pin worked it's way over to the sleeve wall and started eating away at it. Carved a 1/4" wide groove almost all the way through the sleeve.

And no it didn't come out of the motor rusted. It's been sitting outside for a year now on the scrap pile.

 

wow. so maybe i dont wanna push these to 1.6BAR on stock rods...

great info guys. thanx very much.

my thinking has always kinda been, if im going to crack the motor for rods, might as well make the most of them and do some bigger ALPHA turbos.

 

Wow...I am getting worried and a bit confused...isn't it the tuners job to tell us how far we can safely push the engine?

I see a dyno from a member and his tuner post he is putting out too much torque

Here is my dyno...but I have a tiptronic, which loses a lot more power before it hits the wheels. I wonder if its because you ran methanol. I only use 100% ms109/gt plus when i run 1.6 bar (which spikes at 1.7 bar) and have had no issues. Also, it might because your torque curve is very flat at peak...maybe tony can explain.




I might too need to contact my tuner to make sure I am ok lol...softronic, if you would only answer my email!

 

I haven't gone thru the whole thread But I find it ironic how one blown motor with throw everything you been reading and believing out the window... responsibility first comes from the owner. Tuners will tune whatever you want.... I was there myself.. like a kid in a candy store... until things go boom... then everyone is in retreat... Yet when you received a kick *** dyno of the car making globs of TQ you were SOOOOO happy.. why didn't you ask a common sense question... isn't that maybe a little too much too soon? Nope... then your too busy slamming thru the gears...
Everything breaks.. even a Porsche motor..
not directing this towards anyone.. just saying...

markski

 

Yeah I should have put some words in that post above, and didn't mean to get people all worried about their cars now. Just contributing to the OP and made the picture to add some humor to the mix

The tune from Tony @ EPL was fine for the car. No quims or quams about it whatsoever and he will be the tuner for when the car when I finish building it and convert it to E85 for Chris. This particular car was driven VERY hard on the street and had some serious launches and brake boosting. The car was ALSO a previous Ruf 550T converted car with an unknown history, so who knows what was going on before Chris bought it.

Markski said it best. Even unicorns die sometimes. Don't let it put distrust in your tune/tuner and or the setup you have, nor let it sway you from geting A28's because they are one hell of a turbo on this car!

 

Has anyone else on this forum had a engine problem because of A28s?

How do you know the cause of the engine trouble was too much torque vs a problem with the meth / use of stock parts restricting flow / possible fueling issues?