posted
Has anyone installed either of these gears on their 97 SS LT1 6-speed and if so what are the pros and cons of both, which would you suggest, and what brand. Mostly street driving, but want better times at the track. How much quicker might my times be?
Posts: 37 | From: Norwalk Ohio | Registered: Oct 2002
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posted
373s are a mild upgrade to the 342s, 410s will basically make your 6th gear like 5th. I haven't heard any feed back on what first is like with 410s, but I would imagine it would have to be pretty low.
Posts: 3403 | From: Woodcliff Lake, NJ, USA | Registered: Dec 2000
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posted
I believe that the formula for computing your total gear multiplication in a particular gear is to multiply the given gear ratio by the rearend ratio. In the case of first gear a multiplication factor of 10:00 is considered optimal. An Example would be 3:73x2:97=11:08, That equates to a gear multiplication factor of slightly steeper/lower than would be considered optimal. (The higher the gear ratio number the greater the gear reductin.By the way the 2:97 figure is the first gear ratio of the T:56, although I have heard of versions with a first gear ratio in the 2:70's.
Posts: 26 | From: rancho cucamonga cal. | Registered: Feb 2002
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posted
I have 4.10's in mine and I love them. Makes 6th much more useable in town. Definite difference in pull, now I need better sticking tires.
--------------------
Kevin Villier, 2002 SS #186 - 6M with Hurst and "short-stick", TT, navy blue, chrome SS wheels, Bilstein suspension, SS grill, BMR STB, BMR chrome-moly panhard rod, SLP loudmouth, Direct-Flo lid with Holley Power Shot filter, mallory polished MAF ends, 4.10 gears, PPC LT's. 336 rwhp, 345 rwtq
Expect 2/10's in the quarter and much better driveability all around. 6th becomes a useful gear.
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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quote:Originally posted by poSSum: 4.10's with a 6 speed LS1 here.
My favorite mod so far.
Expect 2/10's in the quarter and much better driveability all around. 6th becomes a useful gear.
What he said. I've had the 4.10s in my LS1 6MN for 2 years now, and the mod is an absolute blast,IMHO! Advantages: - car is always "on edge" - ready top rock! - much quicker throttle response - easier to keep car in power band - easier to launch at the dragstip (easier to avoid bogging - may not be a factor in an LT1) - finish 1/4 mi. at the end of 4th, rather than having to shift into 4th just before the finish line. - 6th gear is much more useful - and it pulls on the highway. No need to downshift. - fuel economy in not affected very much (especially in town) because you are running at the same RPM - just up a gear. I lost about 1.5 mpg on my highway mileage cruising at 70 mph. - a lot easier to swing out the ass end
Disadavantages: - more frequent shifting in town (gears are shorter) - first gear is not very useful (almost too powerful) - although easier to launch at the drag strip (less chance of bogging off the line), Art mentions that traction can be a bit a of an issue. 4.10s (smaller gear teeth) + drag radials + a 6 speed with a higher RPM launch = a grenaded rear end! - depending on the install, there could be some gear whine - might be a PITA on long highway trips (get a cutout to drown out the gear whine - possible lowering of top end (although I'm sceptical here!) A 6MN will pull its top speed of about 160 mph in 5th at about 5300 rpm. I calculate that 160 mph would be reached at about 4300 rpm in 6th. http://www.f-body.org/gears/ If the car can't pull 4300 rpm in 6th with the 4.10s, I don't think it would be too far off. Besides, let's face it - how many of us are gonna see that speed anyway? - you'll need to have an HPP3, install an SLP speedo processor or reprogram your PCM in order to keep your speedo accurate and keep youe ABS fully functional. - 4.10s are no good if you will be using any kind of power adder later on (blower, turbo etc.) 3.73's are the max under these conditions - easier to lose control of back end with too much throttle application.
There you have it! Do what you think best addresses your priorities and have fun!
posted
Thanks for all of the information, i'm sure when I decide what to do it will be very helpful. Another question I have is the slp kit the way to go or is there a cheaper way to go.
Posts: 37 | From: Norwalk Ohio | Registered: Oct 2002
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posted
It sounds like you might want to look at 3:90's, you know, the happy medium between 4:10's and 3:73's.If you have the pockets there is somone out there that can make you whatever ring@pinion combo you want, out here in SoCal, Currie Ent. will make you a 12Bolt,"bolt in" with virtually any gear ratio you want for around $2800, the 12 bolt being the musclecar standard for more than 30 years.
Posts: 26 | From: rancho cucamonga cal. | Registered: Feb 2002
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posted
Hmmm.... with all this positive feedback I may have to........oh geez, stop me please gang! Posts: 3403 | From: Woodcliff Lake, NJ, USA | Registered: Dec 2000
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posted
This is an awsome discussion. I am planning 4:10's for my next mod too. Well, it's that or Nitrous. I'm not srue I have the guts to use the spray yet but I would like a seat-of-the-pants improvement without opening up the engine.
If you make this change, let us know how it goes. You might want to consider putting in a lower temp thermostat at the same time. Since you will likely use the HPP3 to correct the spedo, you can adjust for the lower fan setting at the same time.
Ryan
-------------------- I bought an 03 Mustang Cobra!
Used to Have: 2000 Camaro SS #4038. Onyx black / Ebony leather. 6 speed with all GM factory options. Y2Y package; Bilstein, dual/dual, ZR1 chrome wheels, plaques,mats and synthetics. Stock Dyno: 309rwhp 328rwtq Posts: 149 | From: Seattle, Washington | Registered: Feb 2001
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posted
If I do this, I will definently let everyone know how I like it. My car is stored right now so I have some time to decide if I have the money to do this. Also does anyone know of any other easy mods to help with quicker et's? Obviousely a supercharger would help, but I posted a question about them but i got no response so not many people must take that route
Posts: 37 | From: Norwalk Ohio | Registered: Oct 2002
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quote:Originally posted by WhiteNorange97: Also does anyone know of any other easy mods to help with quicker et's? Obviousely a supercharger would help, but I posted a question about them but i got no response so not many people must take that route
For the LT1, a K&N FIPK is usually the kick-off mod and then a cat-back exhaust. A lot of people have had success doing the throttle body "airfoil" mod.
Check out www.ls1.com if you haven't already. You can read all about nitrous, superchargers etc...they have a separate board for each mod.
Lot's of people have done these mods and there is a ton of good information out there.
The crowd on this board tends to be a little more classic and conservative. It seems to me at least, that most of us in the SSOA intend to keep the originality of the SS in tact.
I have a feeling the longer I own my car, the harder that will be. As you can see in my earlier post...I'm already thinking of N20.
Ryan
Posts: 149 | From: Seattle, Washington | Registered: Feb 2001
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posted
I have a 30th anniversary also and had 4.10s installed. As others have said it is the best mod I have done. 1st is almost useless now but throttle response and shifting is much better. Do it, you won't regret it. Posts: 138 | From: Woodstock, GA. | Registered: Feb 2000
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Check out www.ls1.com if you haven't already. You can read all about nitrous, superchargers etc...they have a separate board for each mod.
There is a separate forum on LS1.com for the LT1 guys. Keep in mind that most of the back and forth on that forum is LS1 oriented and would most likely not be applicable to the 97 (or earlier) LT1s.
posted
30th ss 727, Which gears did you use on your 4.10 install? I was looking at the complee kit from SLP, it seems to be a lot of money, but is that the way to go? Also, if you have ran your car at the track, how much better were your times. My car is stock except for a hypertech chip, slp loudmouth, and 160 thermo and my best is a 13.56 @ 102mph. Actually this time was ran before my exhaust. Common times are 13.80's because of bad 60ft times.
Posts: 37 | From: Norwalk Ohio | Registered: Oct 2002
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I have had 4.10's in my 97 SS for about 3 years now. Had 4.10s in my 95 Z28 for 3 years (before I bought my SS).
Here are the ratios you can get for your car.
3.73, 4.10 or 4.56 gears.
3.73? If you aren't doing a power adder you will be dissappointed in these.
4.10's are a nice gear. 1st gear is usable but it will allow you to lite the tires easier. also with the 4.10 gear your 6th gear at 70mph is about 2100rpm. I still get an avg of around 28mph if I just cruise and not hotrodding on the highway.
You will want to calibrate your speedo. You can do it via a Hypertech programmer or Micro Supertuner 2001 (www.fasttoys.net sells them still I think, I like its better then my Hypertech)
posted
Thanks Doug for the info. I was looking at going the the kit from SLP, it seems to be a pretty complete kit. How much performance did you see after the gear change?
quote:Originally posted by WhiteNorange97: Thanks Doug for the info. I was looking at going the the kit from SLP, it seems to be a pretty complete kit. How much performance did you see after the gear change?
I really don't know how much quicker it is compared to the stock setup as I haven't been to the track since I have done them. I would suspect its probably worth around .3-.5 quicker in the 1/4. But I don't for 100%.
I also have a 1LE driveshaft too, that was a noticeable improvement was well. I am also going back to a Cold Air setup (its worth anywhere from .2-.4 in the quarter, I proved that at the track. )
Anyway, good luck, you won't be dissappointed. But like I said check Tbryne and thunderracing to see which is a better deal for you. SLP makes some great stuff so you know thats not a problem.
Make sure you get the gears installed by a professional. Its worth it. Should cost around $200-$250 for installation.
Take care!
Posts: 1031 | From: Germantown, MD USA | Registered: Feb 2000
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