Efficiency with a TP4400?
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,055
Likes: 0
From: Baton Rouge, LA
Efficiency with a TP4400? I dyno'd my car the other day and it made 354 hp locked and 328 unlocked. This was the last pull of 4, and I feel the results are pretty trustworthy.
This is around an 8% loss.
Is this normal?
This is around an 8% loss.
Is this normal?
Re: Efficiency with a TP4400? I can't answer about drive train loss but,WOW,354HP,stock internals.
I will be running mine on the dyno soon and would like to compare with yours.What were your Tq.#s ?What did you use to lock up the vert.?
Our cars have run within .05 most of the time,it will be a good comparo.
<small>[ April 03, 2002, 07:23 AM: Message edited by: jfm ]</small>
I will be running mine on the dyno soon and would like to compare with yours.What were your Tq.#s ?What did you use to lock up the vert.?
Our cars have run within .05 most of the time,it will be a good comparo.
<small>[ April 03, 2002, 07:23 AM: Message edited by: jfm ]</small>
Re: Efficiency with a TP4400? Mike,
The Pro Thruster usually looses about 20-25 rwhp over the stock converter on the chassis dyno, but it's actually much more efficient than it would appear on paper. That's the big reason why racers don't gain much in ET or mph by locking the converter up at the track. Also, the PT4400 will be most efficient in the 6000+ rpm range (more like 6500 rpms). You may not see that result on a dyno-jet, but you will at the track.
The Pro Thruster usually looses about 20-25 rwhp over the stock converter on the chassis dyno, but it's actually much more efficient than it would appear on paper. That's the big reason why racers don't gain much in ET or mph by locking the converter up at the track. Also, the PT4400 will be most efficient in the 6000+ rpm range (more like 6500 rpms). You may not see that result on a dyno-jet, but you will at the track.
__________________
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.
D(irecto)r Pepper
Joined: Nov 2001
Posts: 1,952
Likes: 0
From: Houston Raceway Park...in TEXAS.
Re: Efficiency with a TP4400? Wow, 354!, through an A4 with a big a stall? WOW!, With stock internals? <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
That is awesome.
Your numbers sound great to me.
BTW, when I was running stock internals I only dynoed 321 locked/307 unlocked with the TP4400 yet I was running 11.56 with a 1.501 60's.
(That should give you an idea how bad *** your numbers are)
Dyno-shmyno......your numbers are BAD ***!
That is awesome.
Your numbers sound great to me.
BTW, when I was running stock internals I only dynoed 321 locked/307 unlocked with the TP4400 yet I was running 11.56 with a 1.501 60's.
(That should give you an idea how bad *** your numbers are)
Dyno-shmyno......your numbers are BAD ***!
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,055
Likes: 0
From: Baton Rouge, LA
Re: Efficiency with a TP4400? Thanks for the replies guys.
jfm -- Jason99T/A and i locked the convertor by grounding out the green wire with the black stripe. Really easy, and really ghetto too!
The car made 362 ftlbs of torque locked, and something like 412 unlocked. I think Paul stabbed the throttle from somewhere around a 3500 punch.
Patick, I couldnt tell by your reply, but is there any gain to be had in locking up this convertor?
And I take it you see nothing wrong with the HP difference between my locked and unlocked numbers, which means I see no problem.
jfm -- Jason99T/A and i locked the convertor by grounding out the green wire with the black stripe. Really easy, and really ghetto too!
The car made 362 ftlbs of torque locked, and something like 412 unlocked. I think Paul stabbed the throttle from somewhere around a 3500 punch.
Patick, I couldnt tell by your reply, but is there any gain to be had in locking up this convertor?
And I take it you see nothing wrong with the HP difference between my locked and unlocked numbers, which means I see no problem.
Re: Efficiency with a TP4400? That's the largest percent loss for a YTP 4400 I've seen. Did you ATAP the locked run? When I've locked my converter in 3rd gear I've found that I often pick up some KR doing it.
BTW, amazing dyno #s. With full bolt-ons (except LS6 intake) and a ST 3500 I dynoed less than 320 HP unlocked.
<small>[ April 03, 2002, 09:49 AM: Message edited by: Ragtop 99 ]</small>
BTW, amazing dyno #s. With full bolt-ons (except LS6 intake) and a ST 3500 I dynoed less than 320 HP unlocked.
<small>[ April 03, 2002, 09:49 AM: Message edited by: Ragtop 99 ]</small>
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Fanatic
Joined: Nov 2001
Posts: 1,497
Likes: 0
From: Katy, TX
Re: Efficiency with a TP4400? Patrick is correct Mike.
On my heads/cam car I switched from another brand converter (aprox 4500 stall) which had a difference of 38rwhp between locked, and unlocked on the dyno. We dynoed the 4400 yank it had 28rwhp difference between locked and unlocked. but man at the track....my et dropped 4 tenths ( actually close to 5 tenths) added in a ls6 intake and I was running a full 0.6 sec faster et.
On my heads/cam car I switched from another brand converter (aprox 4500 stall) which had a difference of 38rwhp between locked, and unlocked on the dyno. We dynoed the 4400 yank it had 28rwhp difference between locked and unlocked. but man at the track....my et dropped 4 tenths ( actually close to 5 tenths) added in a ls6 intake and I was running a full 0.6 sec faster et.
TECH Fanatic
Joined: Nov 2001
Posts: 1,497
Likes: 0
From: Katy, TX
Re: Efficiency with a TP4400? locking up the converter is hit or miss. Almost everyone will pick up mph in the traps if they do it correctly, but many people do not reduce their ET, and a few actualy increase their ET when using lockup switch.