How high can you safely rev a motor with a built 4L60E?
#1
11 Second Club
Thread Starter
How high can you safely rev a motor with a built 4L60E?
I'm trying to determine what gears I can go with. I've got a 408 motor being built and I want to run a Performabuilt Lvl 3 4L60E or something similair so keep in mind this will be a $2500 built transmission. Can I rev 6800? 6500? stay 6000 or it'll die?
I figure I might trap as high as 135 on spray so when I ran some gear calculators I found out that third gear tops out at:
6,000 rpm + 3.73 = 123 MPH
6,500 rpm + 3.73 = 133 MPH
6,800 rpm + 3.73 = 139 MPH
I've always heard that RPM's are second only to heat for being 4L60E killers. Can a built 4L60E handle 6800 RPM's or do I need to look at 3.42 gears as an alternative?
Any input is greatly appreciated.
I figure I might trap as high as 135 on spray so when I ran some gear calculators I found out that third gear tops out at:
6,000 rpm + 3.73 = 123 MPH
6,500 rpm + 3.73 = 133 MPH
6,800 rpm + 3.73 = 139 MPH
I've always heard that RPM's are second only to heat for being 4L60E killers. Can a built 4L60E handle 6800 RPM's or do I need to look at 3.42 gears as an alternative?
Any input is greatly appreciated.
#2
TECH Addict
iTrader: (3)
Join Date: Apr 2005
Location: Northern Kentucky
Posts: 2,905
Likes: 0
Received 0 Likes
on
0 Posts
well how fast are you wanting to go??? if you want to get over 150 mph then go with 3.42s but if you are making this a track car then go with the 3.73s. also at that high of RPMs something is more bound to go wrong with the motor than with a built up tranny. what size stall you gonna run also??? plus you can always get a tranny cooler.
#3
11 Second Club
Thread Starter
Originally Posted by Z28LS1camaroguy
well how fast are you wanting to go???
Originally Posted by Z28LS1camaroguy
if you are making this a track car then go with the 3.73s. also at that high of RPMs something is more bound to go wrong with the motor than with a built up tranny.
It is a track mostly car but like I showed the 3.73's do not allow me to cross the traps in third gear unless I can spin 6800 rpm's. I know the motor can handle it but I'm not 100% sure about the transmission.
Originally Posted by Z28LS1camaroguy
what size stall you gonna run also??? plus you can always get a tranny cooler.
Last edited by darrensls1; 03-02-2007 at 03:38 PM.
#5
LS1Tech Sponsor
iTrader: (25)
Good idea well unless its the something similar , I am comfortable with our units to 7000 rpm , I say this because I have run them in excess of that in the past on many occasions. RPM is only and issue because of the pump slide colapsing which we deal with in two ways, lube and centrifial apply of the 3-4 in the lower gears causing premature 3-4 clutch failure which we also deal with in the build, A tight tolerance 4l60e should be able to handle that with no great problem.
Thats my answer, The only request we make from a tuning standpoint on our units is that the presure be returned to the stock setting, Shift points can be set as you please
Thats my answer, The only request we make from a tuning standpoint on our units is that the presure be returned to the stock setting, Shift points can be set as you please
__________________
Last edited by performabuilt; 03-02-2007 at 06:39 PM.
#6
11 Second Club
Thread Starter
Originally Posted by performabuilt
Good idea well unless its the something similar , I am comfortable with our units to 7000 rpm , I say this because I have run them in excess of that in the past on many occasions. RPM is only and issue because of the pump slide colapsing which we deal with in two ways, lube and centrifial apply of the 3-4 in the lower gears causing premature 3-4 clutch failure which we also deal with in the build, A tight tolerance 4l60e should be able to handle that with no great problem.
Thats my answer, The only request we make from a tuning standpoint on our units is that the presure be returned to the stock setting, Shift points can be set as you please
Thats my answer, The only request we make from a tuning standpoint on our units is that the presure be returned to the stock setting, Shift points can be set as you please
So do you think your lvl 3 4L60E under 600 RWHP and spinning say 6700 rpm's can handle 20 track passes a month for six months straight? Then add to that mix that I want to see a transmission that can last at least 2-3 seasons. It's a tall order to fill which is why I have been on the fence between a built 4L60E or a built 4L80E.
#7
11 Second Club
Thread Starter
Originally Posted by Sunset'01Z
why dont you ask the guys that built it?
But still it is a 4L60E and it does have limits. I'm just wondering if my application will test those limits or be well within it. As much as I respect the knowledge of the builders I also understand they are trying to sell me thier product.
Which brings me back to the reason for this thread. If I can "relatively safely" rev my motor to say 6700 rpm's then I want 3.73's and a built 4L60E. If not then I would rather stay on the safe side and rev 6200 rpm's with 3.42's.
Trending Topics
#11
LS1Tech Sponsor
iTrader: (25)
Originally Posted by N4cer
And then what happened to it though?
__________________