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  #1 (permalink)  
Old August 23rd, 2008, 08:34 PM
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PTC converter users
I am leaning towards getting a PTC and Dusty thinks the 2,800 10" will work with my combo. I am looking for feedback from those with a similar combo and which of the PTC converters you use/recommend. If you use/recommend the 10", is it the lu or non-lu? I only drive the car about 2,500 miles a year and most of that is 1/8 mile at a time.

I have turned down the boost to only run 7.2s in the 1/8 since I still have a stock bottom end and don't want to DOTC. Thanks for any comments/suggestions.
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Jim: 87 GN with: TE-61/PTE .63 housing - ported stock heads - Erson 208 cam - Speed Pro forged pistons - PTS trans. & 9/11 converter - MSD 60# - CAS V-4 - 3" DP - ATR 2.5" exhaust - 62 JJ TB/stock plenum - RJC power plate - Gen II w/LS-1 MAF/PL - SMC progressive alcohol - Walbro 340 - and Extender G chip with 26*/22* timing. Best 1/8 mile run: 6.904 @ 100.04 with 1.535 60'.
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Old August 23rd, 2008, 10:17 PM
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ttt
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Jim: 87 GN with: TE-61/PTE .63 housing - ported stock heads - Erson 208 cam - Speed Pro forged pistons - PTS trans. & 9/11 converter - MSD 60# - CAS V-4 - 3" DP - ATR 2.5" exhaust - 62 JJ TB/stock plenum - RJC power plate - Gen II w/LS-1 MAF/PL - SMC progressive alcohol - Walbro 340 - and Extender G chip with 26*/22* timing. Best 1/8 mile run: 6.904 @ 100.04 with 1.535 60'.
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  #3 (permalink)  
Old August 24th, 2008, 12:26 AM
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I wish I could TURN MY BOOST DOWN to run 7.20s But on the subject. Dusty recommended the same converter for my car to run mid 7s.. As soon as I get this radiator issue resolved. A PTC from him is mostly likely my next upgrade..
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Old August 24th, 2008, 08:31 AM
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Jim your running a journal bearing turbo right now correct? If so that 2800 might not spool it up fast enough to get away with using that converter. My BB turbo just doesnt need that 3200. I just dont want to see you lose some ET although I fully support Dustys products.

PM Dusty and talk to him before making any changes yet.
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87GN GT6776bb, stock bottom end, stock heads/intake, 206/206 roller, 60# inj, PTE SLIC, Tranny by B. Hofer, PTC 10" 2800 Conv, Turbotweak, 93 octane & Alkycontrol

11.20@118 mph 1.71 sixty foot(leaving at 0 boost)
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Old August 24th, 2008, 08:42 AM
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Ed, that is correct re: journal bearing. I will have to check back with Dusty.
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Old August 24th, 2008, 08:59 AM
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If you have a the right chip you can spool that 61 with a 2800...
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Old August 24th, 2008, 09:05 AM
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Jim,

Just curious, why do you want to get away from the 9x11?

Mike
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Old August 24th, 2008, 09:37 AM
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I feel a journal bearing 61 should spool as well as a DBB 67. So far, feedback is saying the 2800 spools the 67 very well on the stock motors. I myself would think the 3200 would be better but feedback from the users say otherwise.

A lot depends on your shift rpm. RPM makes the converter couple. If your shifting less than 5600 the 3200 will have a hard time coupling like I like.
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85 Regal w/ turbo SBC
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94mm and 325's

Best 1/4 pass
7.77 @ 181
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Old August 24th, 2008, 11:04 AM
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Mike--The 9x11 really slips (50-60%) in third gear before the lock up. At lock up it is less than 5% slip. I have the chip programmed to lock up at 77 mph in the 1/8 mile. From what I have been reading re: PTC, it slips less throughout the run.

Dusty--I leave the trans. in 'D' and it shifts around 5,500.

How do I post a screenshot from Power Logger?
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Old August 24th, 2008, 11:36 AM
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Quote:
Originally Posted by V6POWER View Post
Mike--The 9x11 really slips (50-60%) in third gear before the lock up. At lock up it is less than 5% slip. I have the chip programmed to lock up at 77 mph in the 1/8 mile. From what I have been reading re: PTC, it slips less throughout the run.

Dusty--I leave the trans. in 'D' and it shifts around 5,500.

How do I post a screenshot from Power Logger?
Your borderline from being able to benefit from a 9.5" non lockup. Like right in between that and the 10". Post your 1-2 and 2-3 shift rpm and mph. If you were running it hard like you did in the sig the 9.5 would couple better. The thing is with the 9.5 you cant turn the boost down since it will pull the engine down too much on shifts. Your leaving a lot on the table in 1st and 2nd unlocked with the converter you are using now.
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Blue GN: Old combo 559whp/706wtq. New buildup to come with race ported GN 1 heads and intake .
Black GN:Stock 147k shortblock except cam ,KB 70 mm TB and plenum, ported irons 1.77in 1.5ex, RJC head gaskets, ported stock intake, 212-212 comp roller, 1.65 T&D's, RJC powerplate, 1" plenum spacer, 83 lb/hr injectors, double pumper, FAST XFI, G-Body FMIC, welded ported stock manifolds, 3.5 dp, CPT 66BB GTQ, PAC dual nozzle alky injection, Dusty PTC 9.5", 200 4-R by me with billet shafted forward drum, billet input, billet ring gear and planet. 8.5 rear with Auburn, 28 spline Moser axles, and LPW girdle. 10.29@133.46mph .Time with old combo (stock ecm, p-trim turbo, and loose converter) 10.88@126mph. Stage II coming soon .
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  #11 (permalink)  
Old August 24th, 2008, 11:56 AM
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1-2 was 4,964 @ 15 mph
2-3 was 5,550 @ 65 mph
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Old August 24th, 2008, 12:07 PM
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I would try the 2800 10" first due to the shift point. It will still spool the 61mm and be efficient unlocked. The 3200 will spool very well but will be more inefficient unlocked.
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Freeman, Fiscus, Kereny, Harmon, W. Brown
Cruz, White, Ted A, Gomes...the list of record holders keeps growing

85 Regal w/ turbo SBC
4.96 @ 149.....3520#
94mm and 325's

Best 1/4 pass
7.77 @ 181
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  #13 (permalink)  
Old August 24th, 2008, 12:12 PM
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Dusty--Would the 10" have lock up at cruise?
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  #14 (permalink)  
Old August 24th, 2008, 12:54 PM
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Quote:
Originally Posted by V6POWER View Post
1-2 was 4,964 @ 15 mph
2-3 was 5,550 @ 65 mph
Id manually shift the 1-2.
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Blue GN: Old combo 559whp/706wtq. New buildup to come with race ported GN 1 heads and intake .
Black GN:Stock 147k shortblock except cam ,KB 70 mm TB and plenum, ported irons 1.77in 1.5ex, RJC head gaskets, ported stock intake, 212-212 comp roller, 1.65 T&D's, RJC powerplate, 1" plenum spacer, 83 lb/hr injectors, double pumper, FAST XFI, G-Body FMIC, welded ported stock manifolds, 3.5 dp, CPT 66BB GTQ, PAC dual nozzle alky injection, Dusty PTC 9.5", 200 4-R by me with billet shafted forward drum, billet input, billet ring gear and planet. 8.5 rear with Auburn, 28 spline Moser axles, and LPW girdle. 10.29@133.46mph .Time with old combo (stock ecm, p-trim turbo, and loose converter) 10.88@126mph. Stage II coming soon .
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Old August 24th, 2008, 01:10 PM
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bison--I hear you but I don't want to have something else to think about besides driving and watching for kr. I still have the stock shifter and it is easy to miss third gear with it. I figure the PTC would help the lower gear performance.
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Old August 24th, 2008, 03:05 PM
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Hopefully I attached a screenshot of the 6.90 run.
Attached Files
File Type: doc PLDoc.doc (55.5 KB, 46 views)
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Old August 24th, 2008, 03:09 PM
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The other screenshot was the wrong one.
Attached Files
File Type: doc 6.90 screenshot.doc (82.5 KB, 53 views)
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  #18 (permalink)  
Old August 24th, 2008, 03:13 PM
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Jim what version PL do you have? I dont have the CS% next to rpm on mine. Is there a certain setting for that and do you think it is accurate? Have you put the numbers is a converter slip calculator like on the TCI website for instance?
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87GN GT6776bb, stock bottom end, stock heads/intake, 206/206 roller, 60# inj, PTE SLIC, Tranny by B. Hofer, PTC 10" 2800 Conv, Turbotweak, 93 octane & Alkycontrol

11.20@118 mph 1.71 sixty foot(leaving at 0 boost)
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Old August 24th, 2008, 04:35 PM
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Quote:
Originally Posted by V6POWER View Post
bison--I hear you but I don't want to have something else to think about besides driving and watching for kr. I still have the stock shifter and it is easy to miss third gear with it. I figure the PTC would help the lower gear performance.
It may actually shift sooner because the coupling efficiency will be better. Basically the higher the driveshaft speed the sooner it will shift regardless of the engine. You need a stiffer spring on the 1-2 valve.
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Blue GN: Old combo 559whp/706wtq. New buildup to come with race ported GN 1 heads and intake .
Black GN:Stock 147k shortblock except cam ,KB 70 mm TB and plenum, ported irons 1.77in 1.5ex, RJC head gaskets, ported stock intake, 212-212 comp roller, 1.65 T&D's, RJC powerplate, 1" plenum spacer, 83 lb/hr injectors, double pumper, FAST XFI, G-Body FMIC, welded ported stock manifolds, 3.5 dp, CPT 66BB GTQ, PAC dual nozzle alky injection, Dusty PTC 9.5", 200 4-R by me with billet shafted forward drum, billet input, billet ring gear and planet. 8.5 rear with Auburn, 28 spline Moser axles, and LPW girdle. 10.29@133.46mph .Time with old combo (stock ecm, p-trim turbo, and loose converter) 10.88@126mph. Stage II coming soon .
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  #20 (permalink)  
Old August 24th, 2008, 04:38 PM
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I'll check on a stiffer 1-2 spring. Thanks.
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  #21 (permalink)  
Old August 24th, 2008, 04:43 PM
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Ed,

I don't know what version of PL I have. Where can I find that info?

Go to Full Throttle support forums website and look in the PL section and do a search for how to add the CS% to the .ini file. I forget what I did but it should be on their website.

I ran the rpm/mph shown on the attached PL screenshot through the TCI calculator and got 61%. I have 27" tire and 3.42 gear.
Last ed