2.5 head on eta block???

[nando]

I know, but by the time his turbo spools up he'll be close to the redline.

[atmh]

I am just repeating what I hear, I cannot guarantee the information is 100% accurate :)

Yeah, I actually just talked to some of the guys at the local parts store who have a race car with the e block and i head. The guy said that he has frequently shifted at 7000rpm without any problems with cranks breaking yet, and the car has participated in 24hr enduro races.

I think that for the most part, people blow things out of proportion. Its important to realize that while there is a limit to how high an engine can rev, its pretty well up there. I was a bit scared about revving it up, but the more I hear, and the more I read, the e crank is good to a pretty deacent redline, and there isn't much issue with it breaking. I supposed boosting it, and revving it to 7000rpm is asking for trouble, but I think I probably can let it slide and go to at least 5,500 or maybe even 6,000rpm without much trouble.

Either way, I still plan on TRYING to keep as close to the stock redline as possible, if I find it isn't working, then adjustments will be made. Anyway, a T3/T4 hybrid should be providing near maximum boost by ~3000rpm, which will still give me a bunch of RPM to play with, let alone the ability to stay within the boost range while shifting as shifts only drop it about ~500rpm (from my general observations)

So maybe your right, 250hp with the 4800rpm redline might not be practically feasible, but nothing is set in stone. Building an engine to a certain goal (in my case, 250rwhp) is not easy, there are a lot of options out there and a lot of different routes to take

[Pat W]

well put :P

[gstuning]

So maybe your right, 250hp with the 4800rpm redline might not be practically feasible, but nothing is set in stone. Building an engine to a certain goal (in my case, 250rwhp) is not easy, there are a lot of options out there and a lot of different routes to take

It´s going to take 273lbs of torque to make that power at 4800rpm

[Rich V]

So maybe your right, 250hp with the 4800rpm redline might not be practically feasible, but nothing is set in stone. Building an engine to a certain goal (in my case, 250rwhp) is not easy, there are a lot of options out there and a lot of different routes to take

It´s going to take 273lbs of torque to make that power at 4800rpm

Shoudln't be a problem. Turbo cahrged M20's are putting out 300lbs-ft of torque at the wheels all the time.

I do think your turbo may be a little too large for such a low redline. You would want max boost by 2500rpms if you're only going to 4800rpm redline.