My dad is, to say the least, disappointed with his 15.04@94mph at the drag strip and now wishes to go stage 2. I have had various friends in the Lightning and Cobra scene tell me to get my own pulley and injectors and go to town, however, I have some questions.

Can the stock injectors go any higher on their injector duty cycle or is it necessary to purchase larger injectors? Can a local shop reflash and tune using the stock ECU or do I need to install a Haltech or SAFC?

From what I can see, the Stage II kit should cost me ~$650USD. outsourcing parts I can pick up a 2.8'' pulley for $90, a set of injectors for a little over $200, and a belt around $40-$75. On top of that, tuning at a local shop yields a rate of $150 an hour. That puts the total price somewhere between $550-$625. However, is it really worth the hassle to do all of the sourcing and tuning when I can install the Stage II myself?

I had a guy tell me this weekend that all he did was "change the pulley" on his LSJ and gain mad horsepower. However, I can't help but think that the smaller pulley and lack of injectors would cause the engine to run waaaaaaay lean and possible burn out a ring.

Thanks for any help.

 

just go to zzperformance.com or ottp-over the top performance. or if you want crateenginedepot and get the full stage 2 kit. crateenginedepot will have the gm stage 2 which is 42# injectors, 77.9mm pulley, stock is 79mm. zzp will have the option of much smaller pulleys and 60# injectors and can tune the pcm for you. I personally went with the GM Stage 2 from crateenginedepot and am very pleased with it, but some just want more power.

 

OTT Stage 2 Kit - Over The Top Performance

Get a custom HP Tuners tune in your area.

 

^^^ This

 

I was able to run 13.6 to 13.9 on just a GM Stage 2 and a Injen Intake. I just recently helped out a fellow guy on the forum who went from stock to OTTP 2. I got a ride in the before and after the install and loaded the tune for him. We did a pull from second and he honestly left me by a car in 2nd. Its a impressive little kit. Have not gotten to see a tune file from zzp to see the difference between the three kits .

HP Tuners takes some time getting use to and you really need to do alot of reading. BYT has a really good tuning excel file. Iam Broke is another guy that has some really good articles on tuning.


I would pick OTTP, ZZP or GM stage kits and go from there.

 

Damn you, I've only gotten a 14.02. Probably the track too....

 

This is a typo on CED's site. The stock pulley is 85mm.

 

No matter where you get your parts from, always go with a custom tune if you want your moneys worth.

 

I went the ZZP route and got a conservative setup with a 3.1inch pulley and 42# injectors and a ZZP canned tune and dynoed at 233whp. With a custom tune I should be at or around 240whp. The kit plus labor to install was at about $750 even. Both ZZP and OTTP are good starting options.

 

You could also troll around the for sale ads and part on together, then get a custom tune. That's the cheapest route.

 

zzp or ottp for sure! i wish i would of just skipped the gm s2 and then get the trifecta tune with the gm stage 3 os awesome tune in my opinion

 

Kind of what i did. I bought the car with a GM2 on it and added the GM3+ Trifecta Tune and had BYT tune my car on top of that.

With GM2,ZZP 2.9 and a Injen Intake i put down 244/225 on the dyno.

Second dyno i was on i put down 233 as my base and after the BYT tune i put down 253/223.

 

I wish you did your comparison on the same dyno.

I find it so odd that you made less power with a trifecta tuned GMS3 OS (before BYT tuned you) over the GMS2 tune. The GMS3 tune as it comes from GM is a good improvement over the GMS2 tune.

Either way you made some nice progress.

 

It was during a BYT/Dyno Meet. Everyone believed the dyno was a little off. I have not gotten a chance to go back to were i had my original one done yet but will have to get a hold of my buddy since its his dyno.