Schantin

iTrader: (6)

Hi. Already looked at the stickies and the search. Neither directly answer my Q. Right now I'm in Germany and get to drive pretty much as fast as I wish in certain locals. But....... I have 4.11 gears in my 9" rear, and they are NOT high-speed friendly.

Right now I'm at 3K RPM exactly at 100mph (which differs by several MPH from the sticky on RPM/speed). Anyhow, I've been told by multiple members on this board that at RPMs above 3K for sustained periods will definetly toast the bearing for the T-56 trans in 6th gear. (Not to mention it just doesn't feel right to keep a LS1 in the 3K+ range for 30 minutes or more sustained )

I'm wanting to average about 2200-2300RPM's at 120-130MPH. I've been looking at possibly installing a center section with 3.42's to meet this goal, but I can't find concrete data to show that this will do the trick. I'd go as low as 3.23's, but I'm hoping NOT to murder acceleration for the sake of top speed. I'm looking for the "happy medium".

To further aid in gear selection, the car is a H/C car (420RWHP) with a 228/232 .601/.601 111LSA cam and ported 243 heads (so yeah....she makes her full power in the higher RPM range).

Any info that would help me pick the right gear would be much appreciated.

01SS99red

iTrader: (6)

Im pretty sure you would need the 3.23 to meet your goal. I dont think you will lose that much on acc. being you pu down 420rwhp.

Jawsgear

iTrader: (2)

Try using our RPM calculator, it may help you make your decesion.

http://www.jawsgear.com/calc_rpm.html

Jeff

SS4Luck

iTrader: (10)

Ive been looking for one of those for so long!!!! lol

therobman

iTrader: (39)

id do 3.42's and a 28" tire heres a calculator to play with
http://www.f-body.org/gears/

ZForce1

I tend to agree with red on 3.23's. I know plenty of people running in the 11's with 3.23 gears.

ZForce1

damn, except I forgot you're running a 6 speed. sorry. An rpm calculator should tell you all you need to know.

SIC LSX

iTrader: (10)

i would go 3.42's im running 11.3's in my cam only m6 and 4th gear pulls to 155mph Im about to go 9" and 4.30 gears looking for 10's N/A

SIC LSX

iTrader: (10)

with it having a 9 inch!

with your 275/40r17s

Richmond has 3.00,3.07,3.10,3.15 gears lol

3.00= 2500@127mph and 2600@132mph
3.07= 2600@128mph
3.10= 2600@128mph and 2700@133mph
3.15= 2700@131mph
3.25=2700rmps@127mph and 2800@132mph
3.50=2900@127mph and 3000@131mph




hoped i helped phill how ya doing?

01ssreda4

iTrader: (96)

try driving an auto with gears at 80 mph.

killagt

iTrader: (3)

any speed limit sign over in Germany, that higher then US ? mabe 100mph speed limit sign ? it be cool if you take some pix of it.

kidreno_21

The speed limit signs here are in kmph, and the highest speed limit sign is 130kmph, which is about 82mph. The autobahn is cool, but the unrestricted areas max recommended speed is still 130kmph. This is their way of saying that if you wreck at 250kmph, they are not responsible.

The problem with driving at high speeds is that there are a lot of stau's (traffic jams) and if there are other cars or trucks on the road, a driver may want to pass the car ahead of them so they will pull out in front of you and then you'll have to fully invoke your brakes or you'll wreck. I have had several cars and a few tractor trailers do this to me.

Of note, I was driving north from Garmish on a Sunday afternoon. There were very few vehicles on the road, and it was unrestricted for 70+ miles. I was following an Audi station wagon (the fastest cars on the autobahn) and we were holding steady between 145 and 155 mph for MILES. Some truck decided he wanted to pass the truck in front of him. He pulled over into the left lane in front of me and behind the Audi. In order to avoid hitting the guys' trailer, I fully invoked my brakes and prayed for friction and heat dissipation. Well, an incident was avoided and my girlfriend got woken up and about **** herself.
The worst of the matter? I never caught up to the Audi. He was long gone.

Schantin, I am running 3.73s here and I am also thinking about changing ratios. I hope we can keep in touch over this matter. I'm concidering 3.23s, I did the gear calculator and I think they will put me where I want to be. Also, do you know a good tuner? I need a touch up tune bad.

Schantin

iTrader: (6)

To all. Thanks for the responses. Using the gear calculator to figure the best ratio. For you Kiderno....sent ya' a PM. In short, have HP Tuners and know how to use it

SIC LSX

iTrader: (10)

all that and ya not telling us what ya going with? lol

Schantin

iTrader: (6)

Hi Daniel, sorry I didn't post to you as well. I'm a *** I'll be looking at 3.10's from Richmond gears for the 9" after using the calculator. Those seem to fit the bill best. BTW, this place (Germany) is a different beast tha the US for the Camaro. As much crap as I got in Hawaii for my "lowly" high-hp 12-sec car, she's actually well suited for this environment. Everything revolves around 1.) Braking capability. 2.) Handling. 3.) Top Speed. 4.) Acceleration. (in that order).

I have 1,2, and 4 covered. The gearing will solve #3. I've had the car to 170mph once, but I was running damn near 5K RPM to do so...... and the vibrations + nose lift were murder at that speed. I've already been through 2x Hawk HPS pad sets w/ my EradiSpeed rotors in the past 2 months. It's very common to have to sudden brake from 130 to 50mph or less on a dime here. For handling, the UMI subframes + strut-bar/ full rear suspension are saving my a$$. On an average curvy road that would be 30MPHin the US, it's 100kmh (62mph) here. I swapped the Sumitomo HTR ZIII's tires to Goodyear Eagle F1's and now have some stupid grip to go above the Euro speed limits on the curves (which has raised a few eyebrows )Acceleration wise I'm pretty much untouchable. I smoke all the Euro-trash + most exotics from a stop. Top speed......well, I quit that game. A 2.0T Audi A4 can run at 130mph at only 2400RPM. I'm already at 3700 at that speed. Thus my gear inquiry.

BTW, the famed Nurburgring is only 45min from my house. Going to run that soon (now that I have my helmet) Looking for a sub-8min time there....hopefully

Also looking at some craziness next year. Camaro's go for high $$ in Germany (over $20K) Might sell tha Z + my Rubicon and have a 2011 CTS-V station wagon in her place by summer 2011 (yep, I said Station Wagon....since I have 3-kids. + who wants to be spanked by a SW that does 3.9 in 0-60mph? )

Hope LA is treating ya' well. Take care bro.

Phil.

Schantin

iTrader: (6)

Very helpful tool. Thanks for sharing!

Schantin

iTrader: (6)

This is the sign for "Go as fast as you dare to go" (ie. No restrictions) ........

SIC LSX

iTrader: (10)

i would build a complete new center section with a stock case One for the hwy and one for the track

fleetmgr

The problem with averaging 130 is that your axle bearings may not support that kind of sustained speed due to the small diameter. All the guys that do the high speed run in Nevada use oversize bearings to keep the heat down. If you average 130, at some point you'll be above that by a significant margin. Have fun!

roy

Hi Schantin
I believe you will have problems with 3.10 gears and cammed car for stop and go trafffic driving here in Germany.

I currently run 3.50 gear in my Camaro over here and in 6th 3000rpms is 131 mph. The car still rocks the bahn at 192mph in 5th at 6500 rpms.