4.10s on the A4 LT1...
#22
Originally Posted by brandboZ28
What blind527 was referring to is if the shift plate has selectors for OD, D, 2, 1 as found on the 3.23 cars as apposed to the OD, D, 2 as found on the 2.73 cars. If you have a 1st gear selector, you have 3.23's or somewhere down the road, the shift plate has been changed. All A4 LT1 fbodies got either the 4L60(700R4) in 93 or the 4L60E in 94-97 which are both 4 speeds. Youre right on there!
#23
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Originally Posted by The LT1 That Could
isn't a true, with 4.10s in an auto and anything smaller than a 28" tall tire, you will shift into OD??
just wondering.
just wondering.
#24
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The 3.23/no limiter thing has to do with a certain option. I forget the RPO code. But with the option you received the 155 speedo, Z-rated tires and no governer. It did NOT affect your gears, as I have seen 2.73 cars with this option.
Yeah I expect my rear to die soon enough. I'm hoping to hit mid 1.7s on the 10 bolt before I have to replace it.
Edit: Gears come tommorow yay!
Yeah I expect my rear to die soon enough. I'm hoping to hit mid 1.7s on the 10 bolt before I have to replace it.
Edit: Gears come tommorow yay!
#25
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Originally Posted by brandboZ28
With 4.10's, a 26" ET Street, and a 6500rpm redline, Im flying through the traps at about 6100-6200rpm in 3rd.....right on the money
#26
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I am a firm beleiver that rear end gear ratio and torque converter/launch rpm is the last thing to consider because that will determine your optinium launch and as you cross the finish line that your in the peak of your gear. If you have to dump to 4th because you run out of rpm OR that you dropped alot of hp because you reached beyond the limit of the combonation.
i.e. you make 300 hp at 4000 rpms and spining up to 6400 puts you persay 200 hp, then going to the next gear (if you can) may put you at a higher number as you cross the traps.
So look at the dyno sheets, if you making near peak power (+/- 15 hp) then stay in that gear. In most cases its 3rd gear in auto and 4th in t-56 6 speeds.
just my experience
i.e. you make 300 hp at 4000 rpms and spining up to 6400 puts you persay 200 hp, then going to the next gear (if you can) may put you at a higher number as you cross the traps.
So look at the dyno sheets, if you making near peak power (+/- 15 hp) then stay in that gear. In most cases its 3rd gear in auto and 4th in t-56 6 speeds.
just my experience
#27
Originally Posted by 25thAnnivTransAm
That's why I'm getting 555Rs and some suspension mods pronto.
#28
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Originally Posted by tekprodave
I can tell you from first hand experience that the Nitto DR's will not be enough. They are no better than a good street tire. I haven't tried the new MT drag radials. They might work in your case. I run ET streets and still have traction issues. But my car is a full bolton LT1 with weight reduction. I've cut several 1.62X 60-ft times on the stock 10-bolt in my A4 car with a 3k stall TC that hits like a ton of bricks. But this will not work for you M6 guys that think you can put in a new clutch and dump it at 6K RPM.
#30
Originally Posted by brandboZ28
What blind527 was referring to is if the shift plate has selectors for OD, D, 2, 1 as found on the 3.23 cars as apposed to the OD, D, 2 as found on the 2.73 cars. If you have a 1st gear selector, you have 3.23's or somewhere down the road, the shift plate has been changed. All A4 LT1 fbodies got either the 4L60(700R4) in 93 or the 4L60E in 94-97 which are both 4 speeds. Youre right on there!
Okay... So what gears do I have then? Gear selector reads OD, D, 2.... But I can still shift down into first, even though it doesn't say it. I assume that means I have the 2.73's... Should have seen the look on my face when I found out it actually shifted down into first. Never hit a rev limiter that hard in my life!
#31
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Originally Posted by Green95Z28
Okay... So what gears do I have then? Gear selector reads OD, D, 2.... But I can still shift down into first, even though it doesn't say it. I assume that means I have the 2.73's... Should have seen the look on my face when I found out it actually shifted down into first. Never hit a rev limiter that hard in my life!
#35
Originally Posted by BlackScreaminMachine
I am a firm beleiver that rear end gear ratio and torque converter/launch rpm is the last thing to consider because that will determine your optinium launch and as you cross the finish line that your in the peak of your gear. If you have to dump to 4th because you run out of rpm OR that you dropped alot of hp because you reached beyond the limit of the combonation.
i.e. you make 300 hp at 4000 rpms and spining up to 6400 puts you persay 200 hp, then going to the next gear (if you can) may put you at a higher number as you cross the traps.
So look at the dyno sheets, if you making near peak power (+/- 15 hp) then stay in that gear. In most cases its 3rd gear in auto and 4th in t-56 6 speeds.
just my experience
i.e. you make 300 hp at 4000 rpms and spining up to 6400 puts you persay 200 hp, then going to the next gear (if you can) may put you at a higher number as you cross the traps.
So look at the dyno sheets, if you making near peak power (+/- 15 hp) then stay in that gear. In most cases its 3rd gear in auto and 4th in t-56 6 speeds.
just my experience
#36
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I have an M6 with 4.10's and I finished the 1/4 while staying in 4th gear, but the needle was buried in the redline. It was the last run of the night so I really didnt care what happened. On my other runs, I did shift into 5th. My launch/traction issues played a big role in this.
#37
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Just to clear it up...
if your gearbox has an optional "1" to shift into... you have the 3.23 posi rear
if it does not and the lowest it goes is "2", then you have the 2.73 open rear end(one wheeled wonders ) But as someone above found out... it will let you shift into first if you force it.
The speedo thing is like this... if you ordered Z rated tires, then you got a 150mph speedo and I think a 155 or so speed limiter(either that or the engine just runs out of umph). If not, then you got a 115 speedo and I'm unsure of how high up the limiter is set, but I'd imagine between 115 and 120.
NOW:
On another forum(not sure if I'm allowed to mention which?), there is a post that came to the conclusion that a stall converter has better effect than gears do... They help, but I think that 4.10s would be overkill... 3.73s should do fine... I'm happy with 3.23s.
if your gearbox has an optional "1" to shift into... you have the 3.23 posi rear
if it does not and the lowest it goes is "2", then you have the 2.73 open rear end(one wheeled wonders ) But as someone above found out... it will let you shift into first if you force it.
The speedo thing is like this... if you ordered Z rated tires, then you got a 150mph speedo and I think a 155 or so speed limiter(either that or the engine just runs out of umph). If not, then you got a 115 speedo and I'm unsure of how high up the limiter is set, but I'd imagine between 115 and 120.
NOW:
On another forum(not sure if I'm allowed to mention which?), there is a post that came to the conclusion that a stall converter has better effect than gears do... They help, but I think that 4.10s would be overkill... 3.73s should do fine... I'm happy with 3.23s.
#38
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Originally Posted by Green95Z28
Okay... So what gears do I have then? Gear selector reads OD, D, 2.... But I can still shift down into first, even though it doesn't say it. I assume that means I have the 2.73's... Should have seen the look on my face when I found out it actually shifted down into first. Never hit a rev limiter that hard in my life!
Last edited by koolaid_kid; 09-28-2005 at 07:29 PM.
#39
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Even though the A4 is an over-driven transmission, I personally would not go higher (numerically) than a 3:73 rear-end. The 4L60e is a wide ratio tranny...you get a good pull out of 1st, but it's all downhill after that, there is such a wide ratio gap between gears. I don't really think you'd realize an earth-shattering difference between 4:11's and 3:73's, performance-wise, but I do think you'd be able to cruise at lower rpm in OD, thus saving gas. Also, around town, my '95 A4 would "ask for" OD at around 40-45mph with the 3:73's. I always left it in 3rd driving around town, and I could just imagine screaming along at hi rpm in 3rd with 4:11's out back.
I have an M6 '02 LS1. This gives me TWO over-driven gears. Still, no matter how insane I build my engine, my car will NEVER see a numerically higher rear-end ratio than a 3:73. It's a street car. Now, if I were trailering it around from drag strip to drag strip, sure, I'd probably go higher...maybe to 4:88...but the car would be travelling one quarter of a mile at a time, so who cares? Back and forth to work, to and from the store, cruisin' around town...that's a completely different ball game.
Quite frankly, I'm perfectly happy with the 3:42's I have now. Cruisin' to and from work on the interstate, with the cruise control set at 62 MPH in 6th gear, I'm turnin' around 1100 rpm. Low wear and tear, good mileage, respectable cruising range....what more could I ask for? At a light, with a 'Stang in the next lane, the M6 turns my ride into a different animal.
The new-generation 5 and 6 speed automatic overdrive trannys are the way to go. You have enough cogs to allow for closer gear ratios, PLUS the advantage of more than one over-driven ratio. With a well thought out and designed 6-speed automatic overdrive, the need for numerically higher rear-end ratios isn't as urgent.
I have an M6 '02 LS1. This gives me TWO over-driven gears. Still, no matter how insane I build my engine, my car will NEVER see a numerically higher rear-end ratio than a 3:73. It's a street car. Now, if I were trailering it around from drag strip to drag strip, sure, I'd probably go higher...maybe to 4:88...but the car would be travelling one quarter of a mile at a time, so who cares? Back and forth to work, to and from the store, cruisin' around town...that's a completely different ball game.
Quite frankly, I'm perfectly happy with the 3:42's I have now. Cruisin' to and from work on the interstate, with the cruise control set at 62 MPH in 6th gear, I'm turnin' around 1100 rpm. Low wear and tear, good mileage, respectable cruising range....what more could I ask for? At a light, with a 'Stang in the next lane, the M6 turns my ride into a different animal.
The new-generation 5 and 6 speed automatic overdrive trannys are the way to go. You have enough cogs to allow for closer gear ratios, PLUS the advantage of more than one over-driven ratio. With a well thought out and designed 6-speed automatic overdrive, the need for numerically higher rear-end ratios isn't as urgent.
#40
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Alright catch this business. My speedo goes to 110 right. I also have D, 3, 2. Its got like a phantom 1st gear. If you pull the shifter a little back it locks into what seems to be a first gear, and I can shift out of it into 2nd, and 3rd. I figured it didnt have too much gear in it cause I was cruising at 50 damn near below 1000 R's. I've had friends with LS1's, although the pull and accel is faster, it's not all that much drastic. I'm confused as all hell now. Do I need some freakin gears and a new gauge cluster now!?