locked vs unlocked
04-02-2008, 05:27 PM
#2
Depends on the torque converter. On a stock cam with a stock engine, it might be 10 rwhp difference. But if you're running a Vig 3600 and a heads/cam engine, it might be 40 rwhp difference. Some converters are more efficient than others.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
04-02-2008, 10:01 PM
#4
10 Second Club
Thread Starter
iTrader: (4)
Join Date: Jul 2007
Location: ny
Posts: 253
Likes: 0
Received 0 Likes
on
0 Posts
all i have to say is wow, im running A YANK SS3600. i dyno'd 389 on a mustang unlocked. so your sayn i could be at around 430-440 on that dyno. thats redic.
Trust me. 
Trending Topics
04-03-2008, 01:13 PM
#10
i would like to know about this as well. from how i understand it, yank PT converters are the way to go if you will be NA and do not want to lock your converter. i have been told by several people that the yank ss and the vig converters will not be as efficient as the PT series.
04-03-2008, 01:32 PM
#11
the thruster yanks are very efficient, mine claims something like 98%... I would also like to add, is there not a risk running locked in 3rd gear at WOT? as far as the lockup clutches etc... i run a yank TT 3000, which is a torque thruster, high STR ultra efficient... according to yank that is
04-03-2008, 01:35 PM
#12
11 Second Club
iTrader: (6)
Join Date: Jul 2006
Location: Sibley, La
Posts: 237
Likes: 0
Received 0 Likes
on
0 Posts
Why worry about it... autos aren't gonna be dyno queens so just use the dyno for tuning and the track to verify results. Locked numbers are worthless because it isn't gonna be locked when you are racing. Take it to the track and post up!
04-03-2008, 04:26 PM
#13
If you are loosing 43 hp on that ss4000 Id say that is a broken converter. I actually just installed the ss4000 in my car and if i see over a 25 hp drop ill toss it threw yanks window after writing f-u DAVe on it. My PT4000 only difference is 18-20 hp locked to unlocked. I cant see the ss4000 being that bad.
04-03-2008, 04:42 PM
#14
you are 100% correct, although i used to lock up the converter in third gear and i actually picked up 3-4 mph.
04-24-2008, 12:40 PM
#15
If you are loosing 43 hp on that ss4000 Id say that is a broken converter. I actually just installed the ss4000 in my car and if i see over a 25 hp drop ill toss it threw yanks window after writing f-u DAVe on it. My PT4000 only difference is 18-20 hp locked to unlocked. I cant see the ss4000 being that bad.
Although it showed a loss on the dyno there is nothing like track times.
It murders on the street and trapped about 1mph faster and ets went down too. It is a way different converter than my old 3500.
