I didn't explain that very good sorry. I currently have an open ticket with trifecta and I would actually be buying the TVS from the guy at trifecta who tunes 05-06 cobalts and have already came to and agreement on a re-calibration. Now a year or so down the road and I don't know if he will still be willing to help. So I am figuring if I want to do this I have to do it all now to avoid tuning complications in the future.

 

first step is to make sure you can still get tuned

 

building the motor wont change the tune

 

There would at least be a timing adjustment. I can hardly even tap the potential of the TVS without building the bottom end. If I dropped a pulley size I would need a retune as well wouldn't I? With a TVS would I keep the stock CR or drop it?

 

timing adjustment for what? yes, dropping pulley size needs a retune. keep stock cr

 

Ignition timing. Basically I'm saying I can't run the potential of the TVS with a stock L61. So I don't see how I wouldn't need a retune when I go built. I will need a retune to crank up the power at least. Would I not be able to drop a pulley size on built engine vs. Stock?

 

yes you will need a built motor to really wind out the tvs, i get what youre saying now.

 

If your planning all this you might be better off buying a lsj or le5 and working with that instead. Or if you really want to do the swap, could look for a lsj donor wrecker

 

I really want to build the 2.2 to keep the car as close to it's base model roots as I can. Maybe I'll get a donor wrecker 2.2 and build it on the side and then do the swap. Is the LE5 plug and play in place of the L61?

 

its not "plug and play" but it will work, your car being 06 makes it a lot harder

 

Alright well it looks like I am going to go with the TVS as I have confirmed that I will have tuning support. Next step will be to build the lower end consisting of:
-Wiseco pistons 10:1
-Eagle rods
-ARP head studs
-Cometic gasket

 

use an oem lsj gasket, or an oem l61

 

The cometic gasket cause problems?

 

you should be able to 300 hp using the M62 with a good map and a small pulley,
becareful of trying to run a over retarded map you can cause knock by not running enough ignition why are you planning on restricting it
i would also consider going for lower compression pistons
i run a cc up front of the car but do plan on running water injection soon when the software i use introduced a second map with safety features which kicks in when/if the water runs out

 

I was planning on retarding the timing to prevent knock.
Do you know of any 9.5:1 pistons available for L61? I don't want to go clear down to 8.9:1

I also don't want to do any water/meth injection. I want to make as much power as I safely can on 91 octane gas because that is all I can get.

 

Is anyone with an 05/06 still running an aem f/ic?

I'm in a similar boat as the OP as I was waiting to order my Trifecta until I got my motor back from the shop.

 

If you still want Trifecta I would suggest trying to get into contact with them and see if you can secure a tune.

 

Anyone know how small of pulley I can run with TVS on pump gas with 650cc/min ~62#/hour injectors, no meth/water or E85?

 

Below is as far as I got last night. I need some female torque sockets. Is there any other relatively special tools I will need?


Valvetrain






I have been following the build book for installing rods an pistons. I was looking ahead in the build book and it says to reuse the old rings on the new pistons. I thought I was supposed to lightly hone the cylinder walls, gap the new rings and use them. Anyone have any insight on this?

Also, those of you who have replaced your own valve springs, what valve spring compressor tool did you use and how was the process?

I still would appreciate some feedback on the smallest pulley people have run with a 10:1 compression, pump gas, no meth/water, and ~62lb/hr injectors.

 

I did actually. No response from wot-tuning and Vince responded saying "support has ended".

/threadjack

 

try reel street performance from the usa

 

I run 8.9 on 91 without any issues, it's better to be safer. It should only be a 2% loss in hp between the two you've stated. Not really a big difference at all.

 

Well at this point I have already installed the 10:1 forged pistons. Everything has actually been put together for a couple weeks now. I mainly wasn't wanting to lose any low end torque.

However, I am getting knock under high load conditions. To help alleviate this problem without sacrificing power I will be installing a water/methanol injection system.

 

If that doesn't work you could try some torco additive. Would be cheaper than high oct fuel.

Are you running bkr7e plugs?

 

Dont run those plugs. They are way too short for an l61