SS4200 vs. PT4400
01-04-2003, 01:27 AM
#1
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SS4200 vs. PT4400 Which is quicker at the track? Which is better from a roll? And, how much of a difference?
Also, what STR is most people using on the TP4400? Everywhere I've seen it says it ranges from 2.2 to 2.7.
Also, what STR is most people using on the TP4400? Everywhere I've seen it says it ranges from 2.2 to 2.7.
01-04-2003, 09:59 AM
#2
Re: SS4200 vs. PT4400 Nobody's run a SS4200 yet so the comparison would just be bench racing. I would expect a SS4200 to have a harder 60' time, but less mph in the traps and less shift extension vs. the awesome Pro Thruster 4400.
From a dead stop, ie 1/4 mile: Even
From a roll: PT4400 by a nice margin
The stall torque ratios for the Pro Thruster converters vary according to stall speed. The lower the stall, the lower the STR. A PT4000 will have a STR around 2.2 and a PT4600 will be closer to 2.7. The PT4400 is around 2.5.
From a dead stop, ie 1/4 mile: Even
From a roll: PT4400 by a nice margin
The stall torque ratios for the Pro Thruster converters vary according to stall speed. The lower the stall, the lower the STR. A PT4000 will have a STR around 2.2 and a PT4600 will be closer to 2.7. The PT4400 is around 2.5.
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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.
01-05-2003, 11:23 AM
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Re: SS4200 vs. PT4400 I'm a little confused Patrick. I just got a PT4000 in and will be installing soon. Yank's website says the PT4000 is a 2.3 STR but I was told the converter I have is 2.86. I will be spraying anywhere from 75-125 wet shot of TNT and would prefer to have the 2.3 so I can spray sooner out of the hole.
What are your thoughts?
What are your thoughts?
01-05-2003, 07:13 PM
#4
Re: SS4200 vs. PT4400 The STR is not as high as 2.86. If it was, it would feel a lot tighter than it is. The PT4000 is a loose feeling converter with a lower STR than you were told. That's a good thing and it should rock for you on a small to medium size nitrous shot. Go for it.
Patrick
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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.
01-06-2003, 01:08 AM
#6
TECH Senior Member
Re: SS4200 vs. PT4400 It will physically take alot of N2O. The problem is it will stall higher than what would be best when running N2O. Your shift extension will be too high.
I used to run a 125 shot on a TP4600. It worked but I felt it was costing me at least 3 tenths as compared to running a tighter converter. The more N2O you run, the farther away from optimal you get with a too loose converter.
I used to run a 125 shot on a TP4600. It worked but I felt it was costing me at least 3 tenths as compared to running a tighter converter. The more N2O you run, the farther away from optimal you get with a too loose converter.
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01-06-2003, 10:28 AM
#8
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Re: SS4200 vs. PT4400 I just ordered a YPT4200 and I was told it will be a 2.86STR. That had better be correct! <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" />
01-07-2003, 12:01 AM
#9
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Re: SS4200 vs. PT4400 </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by OBSSSD@work:
<strong> Would shortshifting the car with a spare N20 pcm be of any benefit wen using a 125 shot with this converter? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, you'de be better to shift it a little low. With a NA shift point of 6200 I'd try shifting at 5500-5700 on the juice with that converter, for example.
<strong> Would shortshifting the car with a spare N20 pcm be of any benefit wen using a 125 shot with this converter? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, you'de be better to shift it a little low. With a NA shift point of 6200 I'd try shifting at 5500-5700 on the juice with that converter, for example.
