kinda confused on whther to go tith 2800 stall or 3400?
Apr 3, 2011 | 09:17 PM
#1
kinda confused on whther to go tith 2800 stall or 3400?
I'm currently using a 3400 rpm stall converter and n/a it was the shiznit.. I love the way it was on the track and street..
but with gas prices climbing thru the roof and being turboed now i'm wondering if i should go back to my stock stall speed of 2800. I'm running a rear mount with JWT camshafts.
Can someone list the benefits of using a smaller stall compared to a bigger stall when using boost??
I know fuel economy is one, but before i go and spend a grand just to go back to stock wanna make certain it's the right choice..
thanks
but with gas prices climbing thru the roof and being turboed now i'm wondering if i should go back to my stock stall speed of 2800. I'm running a rear mount with JWT camshafts.
Can someone list the benefits of using a smaller stall compared to a bigger stall when using boost??
I know fuel economy is one, but before i go and spend a grand just to go back to stock wanna make certain it's the right choice..
thanks
Apr 3, 2011 | 10:03 PM
#4
lol at 10mpg maybe a yr.. was getting close to 15 city before this damn converter..
but like i said is thier any other benefits besides gas milage as to why people with boost have smaller converter stall speeds? ive seen some chevy guys say even 2800 is to high and they go with a 2400-2600
but like i said is thier any other benefits besides gas milage as to why people with boost have smaller converter stall speeds? ive seen some chevy guys say even 2800 is to high and they go with a 2400-2600
Apr 3, 2011 | 10:12 PM
#5
lol at 10mpg maybe a yr.. was getting close to 15 city before this damn converter..
but like i said is thier any other benefits besides gas milage as to why people with boost have smaller converter stall speeds? ive seen some chevy guys say even 2800 is to high and they go with a 2400-2600
but like i said is thier any other benefits besides gas milage as to why people with boost have smaller converter stall speeds? ive seen some chevy guys say even 2800 is to high and they go with a 2400-2600
Apr 3, 2011 | 11:31 PM
#6
I'm assuming it just depends on where your setup starts getting into the meat of your power curve and maybe the difference in the amount of load different size stalls put on your engine. My truck will jump into boost very easily when going up hills in overdrive (more of a load) but if I drop it into third gear I can stay out of boost and pull the hill. My front mount turbo spools pretty fast on my 5.3l so I just went with a 2600 stall, but I would see what the rear mount guys are running.
Last edited by Alpinestar; Apr 3, 2011 at 11:40 PM.
Apr 4, 2011 | 02:28 AM
#7
Found a short article on the internet
You might also check out this post
https://www.performancetrucks.net/fo...ht=stall+turbo
Theoretically, for maximum acceleration the stall speed of the torque converter should match the peak torque rpm of the engine. If a high performance engine makes power at a higher rpm, then a higher stall speed torque converter is what you need to put more power to the ground quicker. When the same vehicle has a turbo installed you want to make sure that you are transferring power to the ground at the best possible rpm and best boost levels. If the stall speed of the torque converter is too low there can be some associate “turbo lag” or delay until the engine rpm comes up and the turbo starts to build boost.
https://www.performancetrucks.net/fo...ht=stall+turbo
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Apr 4, 2011 | 07:06 AM
#8
Found a short article on the internet
You might also check out this post
https://www.performancetrucks.net/fo...ht=stall+turbo
You might also check out this post
https://www.performancetrucks.net/fo...ht=stall+turbo
best runs with pump gas n/a jwt cams and with 8lbs of boost
here is with diffrence of 109 octane race fuel and 93 octane
weird how with pump gas i have that huge 20hp loss right before the shift, but with race fuel it goes away, im going back for more tuning in 2 weeks to see if he can smooth it out some..
Apr 4, 2011 | 07:20 AM
#9
also hate the 80-100hp loss on the low end.. below 4000 rpm's v.s. na would going to a smaller AR housing bring this up? right now i'm using a .96 AR housing on a 67mm turbo on a rear mount and hit full boost by 3800-4000rpm's. Thier is a .85 AR housing that is available for my garrett GT4094R would it be worth a shot to try it? Some of this loss might be from the converter not fully locking up yet i dunno, i really just don't know much about converters,lol
Apr 6, 2011 | 07:06 AM
#10
I'd bump the stall down to about a 3000 and swap on the smaller exhaust side. It will spool much faster, youll just have to see when it decides to nose over on the top end. If it does at all.