Can you up the max rev limit with HPT and if so how... I was playin around with it this weekend and couldnt find it. I change shift light RPM but that didnt do anything lol. What is that for anyway?
http://www.cardomain.com/ride/2090440
you know the little light on the dashboard that lights up and tells you to shift when you're in gear too long? thats the shift light.. its in the upper right corner of the cluster.
the rev limiter is under fuel cut
Engine -> Fuel control -> Fuel cutoff
im always scarred to tell people what to do on HPT..i just keep it to myself so i dont piss anyone off.lol
Built&Boosted moar
04 Cavalier Turbo r.i.p my baby
2nd place 2009 GM tuner bash qwick 8--holla
Saaweeeet...
http://www.cardomain.com/ride/2090440
you can go to 8192rpm max, sad thing is you really cant tune it right beyond 7k
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Will the valve train and whatnot hold up to 7000rpm? All my internals are balanced and whatnot.
http://www.cardomain.com/ride/2090440
it shouldl.. are you making power up there? look at your dynographs to see where you should be shifting at and set the limiter slightly higher.
you're gonna want to drop back into the peak torque part of the curve, so figure your shift point accordingly
Its still putting down power until 5000 so i figured 7000 so that i can drop back down into the 4500-5000 range when I shift
http://www.cardomain.com/ride/2090440
I wonder what an LN2 sounds like that high.
Get some clips of it?
Nitrous Nate wrote:Its still putting down power until 5000 so i figured 7000 so that i can drop back down into the 4500-5000 range when I shift
Of course you are putting down power at 5000 RPM's if the motor runs it will. You should not need 7000 RPM's to drop in the 4500 range. Truly probably drops there on it's own. I know my 2.4 does with the 6400 limiter.
FU Tuning
My LG0\W41 LOVES to spin to 8200 with the Rocket Parts ECM...
now i just need to get the 95 that its in tuned like the RP ECM was.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Taetsch Z-24 wrote:My LG0\W41 LOVES to spin to 8200 with the Rocket Parts ECM...
now i just need to get the 95 that its in tuned like the RP ECM was.
Chris
i hate/love u.
GLD someday... someday...
with the stock 95 LO tune now, it rips them loose in secound as soon as it gets to 4500...
(with 222/50/R16's) mounted on black GTZ rims
ITS HOT
but i need to learn how to mess with injector size and block learn mem.....
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Taetsch Z-24 wrote:with the stock 95 LO tune now, it rips them loose in secound as soon as it gets to 4500...
(with 222/50/R16's) mounted on black GTZ rims
ITS HOT
but i need to learn how to mess with injector size and block learn mem.....
Chris
u need to learn how to get a vid up of ur car one of these days, idk if im the only one that cares but ive always wanted to hear/see/drool over ur stuff
the 02, or the W41?
you should have heard it with the .450/232* intake, .430/232 cams... lol sounded mean as hell, but was SLOW
take a trip down some time.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
MadJack wrote:Nate, the problem with the motor holding up at thoase rpms is the valve train. The stock springs won't hold up, you'll get valve float and break all kinds of stuff, to includ the well built bottom end. Besides, the cam does't have the duration to make power that high.
.....
HOLD UP
Piston speed is a big factor, thus, your rods need to be able to hold this heavy weaght at the end of it.
what engin? 2.2?
89 mm bore and 88.00 mm stroke.....
3MM longer than a LG0, and 2 longer than a LSJ.
that said a LD9 stroke is 94MM... 6 MM shorter.
(thinking out loud there)
with the correct cam, i dont see why a LN2 cant rev to 7 safley, but i dont think the head flow's well enuf to suport it.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
but why rev to rev, if it dosent make power?
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
^^^^ I doubt MadJack is arguing that point. I think he's just stating that Nate will physically destroy his valvetrain without upgrading to a stiffer spring(s). Like Skwirl said, Nate will have to look at his dyno graph and find where he will get the most TOTAL power under the power curve between gears. That will determine exactly where he needs to be shifting. Also, without custom gear ratios, that doesn't necessarilly mean shifting at the same rpm in each gear.
-
"Youth in Asia"...I don't see anything wrong with that.
....... nothing will get hurt unless he goes above 7K....
2200 stops making power at what.... 5500?
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Actually, odds are, something will get hurt before 7000rpm. A stock 2200 peeks out at approximately 5200rpm. With the mods he's done it's still the same, but the power holds on a little longer after peek (and peek is higher). Making power any higher isn't the question right now, it's needing a cam that can let the motor rev that high and the springs to support the lift and rpms.
The stock rev limiter on the 2200 is at 6250rpm for a reason. It's not that the bottom end can't hold up, it's the springs aren't strong enough to support those rpms or the lift that typically comes with a cam with the duration need to make those rpms. Remember the stock springs only have a seat pressure of about 78lbs @ 1.60" and a spring rate of somewhere in the neighborhood of 228 lbs/inch (that works out to be 176.5lbs open pressure). This is not very conducive to high rpm operation with .432"+ lift or rpms over the 6250 rpm rev limit.
He can easily get a cam reground to the specs he needs. The problem lies in the need for springs to handle the cam specs (i.e. total lift, ramp rate and rpm) before the springs begin oscillating and valve float sets in.
Edited 1 time(s). Last edited Sunday, December 23, 2007 4:49 PM
g*
