Can't make up my mind.. - Page 2 - LS1TECH - Camaro and Firebird Forum Discussion



Road Racing Road Course | Autocross

Can't make up my mind..

Reply
 
Thread Tools Search this Thread
Old 05-13-2016, 12:58 PM   #21
11 Second Club
iTrader: (18)
 
thunderstruck507's Avatar
 
Join Date: Mar 2008
Location: Northwest AR
Posts: 8,270
Default

Quote:
Originally Posted by redtan View Post
How long exactly were the sessions?

I found that even with a small stall (26-2800) using a good size stacked plate cooler mounted right in front of the car the trans temp would never go over 210-220 even in 80 something degree weather after 20 minutes.
We were just dicking around doing laps. But when the local guys do a track day at Hallet in OK they do 20min sessions.

20 mins straight of very hard driving might be enough to tax the trans temps...but I'm not certain either, never done it nor do I know anyone who has tracked a stalled 4l60e.
thunderstruck507 is online now   Reply With Quote
Old 05-14-2016, 09:40 PM   #22
TECH Fanatic
iTrader: (1)
 
kingtal0n's Avatar
 
Join Date: Nov 2011
Location: florida
Posts: 1,425
Default

it depends on myriad factors. weight of the vehicle vs stall speed vs rear gear, I think is the most important. If you have a deep rear like a 2.83, and a very high stall like 3000 or 3800rpm, with a very heavy vehicle 3800lbs, the trans is going to sit at max stall, slipping, generating ALOT of temperature rise.

On the other hand, something that gets out of its stall range quickly and tightens up like a 3.73 gear with 2800stall in a 2800lbs vehicle will probably never get hot. \

Once you are moving good, if you have the converter clutch for it, you lock it up. They make a triple plate lockup clutch for even nitrous users trying to lock it 1:1. This takes all the slip out of the equation, and this is mostly how you will want to track it, it will behave as if you had a manual trans. The ONLY reason it cannot completely mimic the manual is because the auto's internal parts are slightly heavier, giving you a few % less economy and a few % less power at the wheel. Th gear different (engine speed vs road speed) is negligible with a converter since you can unlock at will (simulating a "downshift" without downshifting). Such a minor price to pay for such consistency/ease of use.
kingtal0n is offline   Reply With Quote
Old 05-15-2016, 07:20 PM   #23
TECH Junkie
iTrader: (4)
 
redtan's Avatar
 
Join Date: May 2008
Location: Belmont, MA
Posts: 3,763
Default

Quote:
This strikes me as extremely odd. I've heard of people with coolers running much, much hotter than that. Hell, I've gotten my T56 into the 270s on my Z06. Had the rear axle boiling in my Z28, I'm certain its T56 gets far north of 210 and it has no torque converter to cook the fluid. You not pushing the car that hard?
I was pushing the car as hard as it could handle. Now I'm no pro and the course wasn't exactly high speed, so the WOT bursts were relatively short save for the long straightaway... but nonetheless, I was on the accelerator pedal with an unlocked stall for much of that 20 minute session.

And don't forget, this is a big *** cooler I'm talking about, something in the range of 45,000 BTUs...not some wimpy little thing. So not all coolers are created equal or have the same capacity to cool. And if they are placed in a poor position where they don't get much airflow and rely only on a fan to move air it might not be as efficient as one in the exposed nose of the car where it had 0 obstructions and was fed direct air at high speed.
redtan is offline   Reply With Quote
Old 10-01-2016, 10:25 PM   #24
Teching In
 
Join Date: Dec 2015
Posts: 9
Default

Quote:
Originally Posted by ZOBETZ View Post
Thank you very much for the reply, and I am just looking for opinions and recommendations. Along with some real life experiences to back some of it up. I like the paddle shifter thought, would also be very original too. I will start looking at that stuff also. (Prolly make it an even harder decision) lol
I realize this is an old post but if youre going with an auto you better build it strong before I did the t56 swap in my fbody I took it to my local road course with an auto 4160e just to see how long it would last I knew it wouldnt last long because i was ***** 450 rwhp. Sadly the transmission didnt do well it lasted 2 laps and was destroyed after going around the last corner. If you dont like the idea of a manual trans with better gas mileage and that will perform better on the track Id get whatever auto trans you get it take it to a reputable shop to have it heavily beefed up. Let me know what you choose if you havent chosen yet, even so an update would b cool.
bjdouglasz28 is offline   Reply With Quote
Old 10-02-2016, 06:13 PM   #25
TECH Enthusiast
iTrader: (1)
 
.boB's Avatar
 
Join Date: Jan 2014
Location: Colorado Springs, CO
Posts: 687
Default

I can't think of any good reason to use an automatic on a road course. Too big, too heavy, too difficult to keep cool, and not enough control.

IMO, about the best thing out there is a Levy Racing T5, with a 5" dual disc clutch. Still has an OD for the highway. And saves about 60 pounds over the stock T56. Also available with dog rings and straight cut gears.

Some day...
.boB is offline   Reply With Quote
Old 10-03-2016, 06:32 AM   #26
Teching In
Thread Starter
 
Join Date: Jan 2016
Location: Southern ohio
Posts: 19
Default

Since this post I actually picked up a T56 for 500$ from someone local. Needed rebuilt so at the moment I'm saving up to send it to tick for a full rebuild. Thanks for all the input fellas.
ZOBETZ is offline   Reply With Quote
Old 10-05-2016, 02:07 PM   #27
Launching!
iTrader: (5)
 
GarrettM's Avatar
 
Join Date: Dec 2009
Location: Dallas TX
Posts: 280
Default

I loved being able to cruise down the highway and mash on the gas with my auto. It was relaxing. But once I got serious about AutoX I traded my car for a 6 spd. If you want to be competitve, its hard to do so when you and the car arent working in unison. The 6 spd allows you more control of the car for upshifts, downshifts, engine braking, weight transfer etc. You can get it done with an auto no doubt, but it would be more difficult.

At the end of the day whats important to you. When I was drag racing we all knew tit for tat, autos when every time. Throw corners into the mix and that all goes out the window though.
GarrettM is offline   Reply With Quote
Old 10-13-2016, 12:46 PM   #28
TECH Junkie
iTrader: (4)
 
redtan's Avatar
 
Join Date: May 2008
Location: Belmont, MA
Posts: 3,763
Default

Quote:
But once I got serious about AutoX I traded my car for a 6 spd. If you want to be competitve, its hard to do so when you and the car arent working in unison.
After driving both a 4 speed auto and 6 speed manual on a roadcourse, I would tend to agree to that statement.

However, I will ask this, since you mentioned being competitive in AutoX...what is the benefit of having a 6 speed manual and staying in 2nd gear the ENTIRE run (which is the case for 99% of AutoX runs) vs. a 4 speed automatic and also staying in the same gear the whole time? In that case, why wouldn't you be as competitive with an auto as with the manual?
redtan is offline   Reply With Quote
Old 10-15-2016, 12:10 PM   #29
10 Second Club
iTrader: (18)
 
DietCoke's Avatar
 
Join Date: Mar 2004
Location: Manhattan, KS
Posts: 3,503
Default

Quote:
Originally Posted by redtan View Post
After driving both a 4 speed auto and 6 speed manual on a roadcourse, I would tend to agree to that statement.

However, I will ask this, since you mentioned being competitive in AutoX...what is the benefit of having a 6 speed manual and staying in 2nd gear the ENTIRE run (which is the case for 99% of AutoX runs) vs. a 4 speed automatic and also staying in the same gear the whole time? In that case, why wouldn't you be as competitive with an auto as with the manual?
Direct coupling to the driveline vs no coupling at all.

Though to be fair, I know of a couple fast powerglide cars that have autoX stalls in them (900-1200 stall speed) that work pretty well
DietCoke is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2009 Impala SS P0306 Code - Stumped Richard Zielenski LS4 Performance 8 02-27-2017 05:44 PM
1959 IMPALA 06 LS2 WITH AUTO TRANS-suspension and brakes? chitown64 Conversions & Hybrids 9 08-18-2016 11:26 AM
mechanic is stumped, any ideas? z_speedfreak LT1-LT4 Modifications 35 05-09-2016 05:16 PM
My 66 Impala 5.3 swap JDub66 Conversions & Hybrids 80 05-26-2015 09:03 PM
LG Pro Headers or American Racing? SERB Z06 Corvette Performance 39 10-24-2008 11:05 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 03:52 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: