Op sorry to hijack your thread but it's info that's useful too you-
3rd gear with the 3.82 gears I hit redline (7,200) about 40ft from the lights and started slowing down, but still trapped 115 due to not shifting into 4th and losing speed doing it. That was shifting at about 7,000 every gear which is a waste for my power.
With the 4.45's I'm at about 6200 in 4th gear going through the lights at about 112-113. I would have to rev to like 8,300 in 3rd to run it out without shifting. And we know that ain't happening. 1st gear is a bear to not spin off the line unless you have slicks. My drag radials won't even hold it. Slicks will.

 

I know but zzp says if ur planning on doing 600 plus u need the girdled block or ull crack cylinders possibly

 

Do you think maybe they wanna sell their girdled block which is $1000 more?

 

Guess ull find out eh

 

YOU will DEFINITELY need a girdled block with going for 600 lol

Ask me how I know. Personal experience, a Gen 3 block will handle 500+....for a little bit. And then your car will force you to upgrade it. :-)

As for the 6 speed, after having 3 our of the 4 transmission options in my car before I started working at ZZP (3.82, 4.45, and F40), there is no comparison. The recommended F40 blows the other two out of the water.

Definitely not slower around the track either (road racing or straightline). The F40s 1st gear isn't as usable as the 3.82s, but not quite as bad as the 4.45, the rest of the gearing has been by far the favorite out of all the transmissions.

Had a non LSD 4.05 in my LSJ though.

 

Im only gonna turn it up to see what it'll do with the 71 after the dyno I'll be running it at a sane level

 

yeah, after having my STi with a 6 speed if I still had a Cobalt I'd run an F40 in a heartbeat.

 

Would 500whp be reliable with non girdled block. Or is that just an upgrade waiting to happen as well?

 

Right at it would likely be fine. All depends on how much you beat on it and the like.

 

I ran my stock block at over 500 and its fine

 

I also ran mine there....for a decent while, but it is a disaster waiting to happen. I prefer to nip things in the bud, personally.

Wouldn't recommend it. Gen 2's are known to be ticking time bombs past 450.

 

What's your 75-100? Compared to Shaun's 2.9

 

IDK I only did 90 to 130s this year on low boost