What converters you guys using in 10 sec street/strip cars
#2287349
04/13/17 11:21 PM
04/13/17 11:21 PM
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Joined: May 2009
Posts: 511 Temperance, MI
68 HEMI GTS
OP
mopar
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OP
mopar
Joined: May 2009
Posts: 511
Temperance, MI
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Broke my 9 1/2", said the turbine is broke. Place I sent it won't touch it. Originally a Tci, and I may send it back to them eventually. Looking for what everyone else uses.
All the companies I called we're very helpful. But there are a lot of opinions.
Background on the car
69 runner 3760# + my 240# 511 10.5:1 with standard port SR's ported by MCH 260/266 @.050 on 110 in at 106 Six pack or sometimes a tm6 with a 1050 annular 4.10 gear 28" tire. Shift 6200-6300
It's been 10.92 @ 123.4 through 3" mufflers
ATI recommended a tight 8". Sounds a little wild for the car?? Coan recommends 9" sounds about right PTC 9 1/2, really like what he had to say. Turbo Action actually recommended a J. Although they no longer make them. Dynamic I have absolutely no interest in
I actually have a J on the shelf and am going to try it, I do feel like It may be a bit loose though and give up some ET given the low shift points.
Thoughts, opinions, experience ??
Last edited by 68 HEMI GTS; 04/14/17 12:03 AM.
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287355
04/13/17 11:29 PM
04/13/17 11:29 PM
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Joined: Oct 2004
Posts: 16,480 Canada
CrAzYMoPaRGuY
I Live Here
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I Live Here
Joined: Oct 2004
Posts: 16,480
Canada
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I went with a 9 1/2" PTC built to my car's specs. I myself like the bigger pots on street car converters.
CrAzYMoPaRGuY
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287360
04/13/17 11:41 PM
04/13/17 11:41 PM
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Joined: Jan 2003
Posts: 4,448 Phoenix, AZ
MoparBilly
master
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master
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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If you never plan to run nitrous, I would definitely go with a tight 8". They are a more efficient converter. Only go to a 9-9 1/2 if you make a ton of torque, that may drive thru the 8".
We (My brothers and I) have a great relationship with JW Performance in Florida, and have sold many of their converters.
Love my 8" JW in my 904, 10.39-128 motor, 9.65-138 spray, driven a bunch.
"Livin' in a powder keg and givin' off sparks"
4 Street cars, 5 Race engines
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287392
04/14/17 12:21 AM
04/14/17 12:21 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I have a couple of J converters one in the race car and the other in my 416 that was tightened up by Lenny(Ultimate conv).. its now a 4500 stall for the street/strip.. I like the J and you can get it tightened if you want.. that uses quality parts inside it.. any quality conv shop can work on it(you dont want some cheapo company putting in junk parts)
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287470
04/14/17 02:20 AM
04/14/17 02:20 AM
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Joined: Aug 2003
Posts: 43,300 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,300
Bend,OR USA
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I've had a bunch of different brand and size converters in race cars and street and strip, my old Duster had a custom made off of the dyno sheets 10 inch Continental street and strip. It was to tight for drag racing at the track, it would push the front tires locked up on the brakes through the staging beams at 2300 RPM in low gear I ended up breaking the sprague in it after hopping the motor up enough to go from 10.69 ET at 124. MPH to mid 10.30s at 127+ mph at 3450Lbs with me in it. I put a Turbo Action SS/AH 8 inch foot brake converter in it, it picked the car up .2 ET and 2.+ MPH in the 1/8 MILE It was way easier to drive at the track and very good to drive on the street Find a good T/A 069J 3800 or a T/A 4200 J converter or a new 8 inch from Paul at T/A I have learned that the more HP and torque you have the larger diameter converter you need, if your under 850 HP and similar torque go with the 8 inch, if you have more HP and torque than that go with the 9 inch
Last edited by Cab_Burge; 04/14/17 02:22 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287478
04/14/17 03:36 AM
04/14/17 03:36 AM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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That cracks me up. ATI flat out refused to build me an 8" for my BB 493 because I street drive my car.
My opinion, the PTC 9.5 is probably the cheapest option and will be perfect
Im an Ultimate customer and love Lenny's service
Last edited by sixpackgut; 04/14/17 03:37 AM.
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287493
04/14/17 06:52 AM
04/14/17 06:52 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
master
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master
Joined: Dec 2006
Posts: 4,647
aotearoa
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My 71 cuda runs mid 10's but would probably run low 10's with a bigger carb. But we're doing it with an 8" turbo action converter I've own for 15 years now. Has a mech diode for a sprag but it's bulletproof behind all the motors I run with it.
Last edited by rebel; 04/14/17 06:53 AM.
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287591
04/14/17 11:49 AM
04/14/17 11:49 AM
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Joined: Jan 2003
Posts: 2,937 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,937
A shed in England
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Way back, when the car had a 528, we had a generic 10 inch B&M converter that we'd had behind a 440 in various guises. The car would run 10.60s and was real nice on the street. We got a custom 8in converter from ATi and also did a cam swap basically going to the next one down the page. After a couple of dozen passes we got the car to go a best of 10.008 @ 137 and run a handfull of 10.0's, mainly 10 teens. It was still nice on the street. We ran the same 8in converter behind the 572 for many years but we always felt it slipped a lot, the RPMs would only drop 300 rpm on each shift. The 655 has a custom 9.5in ATi for reference.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287633
04/14/17 12:56 PM
04/14/17 12:56 PM
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Joined: Jan 2003
Posts: 13,400 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,400
Marion, South Carolina [><]
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I have a local company build mine for me...all custom. Atlantic Coast Converters. I used a 9" 5k stall behind my 10 sec 446" wedge another 9" behind my 572" hemi. A GOOD converter will not slip excessively and will drive fine on the street no matter what the stall rating is.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287650
04/14/17 01:38 PM
04/14/17 01:38 PM
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Joined: Mar 2004
Posts: 314 Medina, OH
dart440_72
enthusiast
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enthusiast
Joined: Mar 2004
Posts: 314
Medina, OH
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Another vote for ProTorque! Great customer service!!
72 Dart 500" low deck Indy SR heads. 10.40 @129 best so far
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Re: What converters you guys using in 10 sec street/strip cars
[Re: BradH]
#2287730
04/14/17 04:01 PM
04/14/17 04:01 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Dynamic (Frank Lupo) 9.5" My son and I both use the Dynamic 9.5 converter in our street cars and we could not be happier. They drive like normal cars as I can cruise at 1500 rpm or 2500 rpm and it has no slippage and drives great. At the track when I hammer it the converter flashes around 4200 and works nice. It may go a little faster with an 8" or better stall converter but this Dynamic works great as an all around converter for a street car thats sees the track once or twice a year. And mine has been in my car since 2006 and my sons has been in his Dart since 2003 and he just ran a new best last Oct. Ron
Last edited by 383man; 04/14/17 04:02 PM.
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Re: What converters you guys using in 10 sec street/strip cars
[Re: 68 HEMI GTS]
#2287747
04/14/17 04:35 PM
04/14/17 04:35 PM
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crabman173
Unregistered
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crabman173
Unregistered
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I order the stock replacement 727 converter for a mid 70's dodge pick up with 4wd and a 318 It is about $75 from any wholesale trans parts company and I have found it to the the loosest stocker out there and just perfect for hot cheap street use--I have bracket raced them with 440/ big hyd cam/ small slicks cheap fun! JW--hard to beat, ATI probably some of the very best, TA smart guys perfect workmanship and they know Mopars but.. Everyone has gone to the 9 1/2 because of core issues--it offers the converter builders lots of choices in stock form by way of many factory combos they can mix and match for effect I found the J to be the best magic unit ever in a footbrake car but was too loose in my 69 Super B with 451 SR head 4.10 gear car for much street use--
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Re: What converters you guys using in 10 sec street/strip cars
[Re: nss guy]
#2287844
04/14/17 08:12 PM
04/14/17 08:12 PM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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8 inch PTC.... I also foot brake.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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