i get alot of black soot from the tail pipe and have always been told that is rich and lean was where you dont get the soot. is this different in DI motors

 

All motors produce carbon soot. It is that a normal byproduct of the combustion process, but most cars do not have strait through mufflers like our cars do. Instead of all that carbon collecting in the muffler it shoots right out to the tail pipe. Even with as lean as the stock tune is it will still blacken the crap out of the tailpipe. Perfactly normal and nothing to worry about just messy to clean.

 

How many times did you see this knock?

I am thinking that the ECU was still adjusting. If it was a new tank of gas and you did three runs back to back , not sure if it was long enough to compensate for the current conditions. If it was consistant on different days and gas then that would be different. Sometimes ghost knock will occur with stock tunes as well. The same could be applied to the AFR if it is not corrected yet.

si o no , amigo?

 

and whoever said you can buy the spec clutch for $550 straight from them where can you getting that from? Because it was over $600 on their forum

 

and whoever said you can buy the spec clutch for $550 straight from them where can you getting that from? Because it was over $600 on their forum

 

3 pulls stock tune. It was not Ghost knock it was there for all three stock pulls. Car was driven down the hwy to the shop for about an hour so it was adjusted and warmed up. I did stop to top off the fuel tank about 3 gallons or so went in and I drove for 30 Min after that but that is not it trust me. The fuel just takes too long to get there after you go WOT so we made it come a little sooner and richened it up quite a bit and that took care of the knock. Loaded dynocom dyno that I used may have something to do with it too. Still should not knock like that

 

As of now it has been holding up fine, no problems at all.

 

according to http://www.zercustoms.com/news/Chevr...-SS-Turbo.html

The full torque seems to come on the the range that you have said. So I am thinking that with the DOHC and this aggressive torque goals from the factory to achieve this number so early in the power band might add the the leanancy of the tune. The above graph doesnt seem to indicate any knock in that range , but is obvious lean in the said area. It seems that with the type of turbo they chose that extra timing seems to get the turbo to spool faster and maybe create higher ext gases, hence the blow through muffler setup as well. I dyno'ed my car as well and had a similar graph in my AFR's. but no knock. So I am thinking that with the Alum block they feel that this is acceptable for them if they are going to warranty it .LOL I know that from my previous experience from tuning my cars that all the FI cars will have knock in consistant places, due to maybe casting errors, assembly, injector malfunctions, etc. , but all seem to stay within acceptable AFR's. All this to say that I think that this knock might not necessarily be detrimental, although not ideal , probably more enevitable.
I think that the load dyno is probably not the culprit , unless it was improperly calibrated , but I doubt that.

 

I am unsure as well but the timing advance on these cars is pretty conservative if you ask me. It is like 10* advance at WOT stock. I have mine advanced to 14* advance with no knock whatsoever. My A/F is richer than that tune on the bottom end though. The dyno was loaded to 8% because unloaded the car boosted only 14 psi stock instead of 16 psi.

 

Did you happen to get a look at how much timing was at the range of knock on the stock tune? Is the TDC range the same in these DI cars as in regular FI?

 

Hmm. I would have thought that the higher gears would cause the clutch more distress, but you seem to imply that the low gears are the bigger problem? I've never had to deal with clutch slip before, and will be getting a tune shortly, so I guess I should start learning how to deal with it...

Thanks, Mal.

 

I went and looked it up the 557.00 was for a stage two clutch for a sc, and it was 619.00 for a stage three for the tc. my bad

 

No. The clutch would have more stress in higher gears at lower rpm's. That is what could cause the clutch to slip!

 

i just got my tune 2day and all i can say is wow!! other then the traction problem everything is good and no clutch slippage whatsoever. all props to everyone @ cia and trifecta!

 

Glad to hear it!

 

I got my cable today and I am blown away by this tune. It was cake to use the software and install the tune. The car pulls so hard its unbelievable!

 

You guys are getting me excited!

 

you should be! lol

 

I wanna scare some people when they ride and i am sure this will do it lol!

 

it scares me sometimes lol

 

how do you install it???

 

plug up, load, and drive

 

Did Anyone Just Use The Cable And Your Laptop For The Tune? If So Do You Data Log It At All And Send That Back To Vince So He Can Tweek It Out And Send You A Revised Tune Through Email.

 

I used my laptop and cable, but I didn't datalog and send it back to vince. I am waiting until I get my downpipe and Cold Air Intake before I have him adjust it.

 

WWWWWWWOOOOOOOOOOOOWWWWWWWWWWW !!!!!!! Just tuned it. easiest thing in the world and WOW does it pull boost up to 22, yes some slippage up front but this is amazing!!!! Thanks guys, just let me know where I can get the metal to replace the plastic on the turbo. Wow can't get over how easy and the incredible notice in hp and torque!!!!