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Looking at a new converter..
#437288
08/13/09 09:35 PM
08/13/09 09:35 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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and thinking about going to a 9" from a 8" and dropping from 5700 rpm stall to 5000 rpm stall, this will be custom made for my combo, my question is has anyone gone from a 8" to a 9" and what were your result's even if you changed stall speed, and what is the real advantage of one size over the other. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Looking at a new converter..
[Re: dartman366]
#437289
08/13/09 10:12 PM
08/13/09 10:12 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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I had a 9" in that went to 4600 when I ran my best. I now have an 8" in that goes to 5600 and I'm running a couple .1's slower. 
I need to get my 9" redone 
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Re: Looking at a new converter..
[Re: max_maniac]
#437291
08/13/09 10:25 PM
08/13/09 10:25 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Was that for me or him Russ? 
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Re: Looking at a new converter..
[Re: WILD BILL]
#437292
08/13/09 10:30 PM
08/13/09 10:30 PM
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Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
S/ST 3040
master
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master
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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It was for Bill.  Bill Hart.........your converter may be a little on the loose side but, I'll bet, not much. It might need something done to it, to get a little more top-end efficiency though.
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Re: Looking at a new converter..
[Re: max_maniac]
#437296
08/13/09 11:33 PM
08/13/09 11:33 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Quote:
Quote:
Was that for me or him Russ?
It was for Bill 
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Re: Looking at a new converter..
[Re: dartman366]
#437297
08/13/09 11:52 PM
08/13/09 11:52 PM
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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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Quote:
and thinking about going to a 9" from a 8" and dropping from 5700 rpm stall to 5000 rpm stall, this will be custom made for my combo, my question is has anyone gone from a 8" to a 9" and what were your result's even if you changed stall speed, and what is the real advantage of one size over the other.
Bill whats your peak torque RPM and what do you shift at
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Re: Looking at a new converter..
[Re: MR_P_BODY]
#437298
08/14/09 12:52 AM
08/14/09 12:52 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Coan doesn't seem to be a popular choice around this forum, but they have excellent customer service. And IMO the best converters I have ever run..They will answer plenty of questions about a converter even if you didn't buy it. The keep a history of every converter, and can pull up the info on a custom converter like it was called in yesterday on a converter built back 6 years ago..They did so im My case. My cars in back to back test always pickup/ MPH better than other popular converters recommended on here 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Looking at a new converter..
[Re: max_maniac]
#437301
08/14/09 09:07 AM
08/14/09 09:07 AM
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Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi
master
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master
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
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Quote:
Bill, have you called any of the major converter companies and asked them to spec a converter for "your car and combo"? You can also call them and let them know your combo and converter you have now and maybe they can rework that one to match your combo and make it better
Russ
 Good advice...pick a quality name and trust them Personally I prefer ATI
Rickster
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Re: Looking at a new converter..
[Re: J_BODY]
#437303
08/14/09 05:37 PM
08/14/09 05:37 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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what I have done is talked to a guy here fairly local about building me a new one, he told me that a 9" is way cheeper than a 8" because of the internal componet's cost and also the availability of a useable 8" core, and he guaranteed that he can make a 9" work just as well as or better than a 8" at almost twice the initial cost, from what I have been told by him and a number of his customer's is that he hasn't had a dissatisfied customer yet, and will strive to maintain that reputation, he does not advertise and has built a customer base by word of mouth alone. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Looking at a new converter..
[Re: RyanJ]
#437309
08/15/09 09:47 PM
08/15/09 09:47 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
Car has ran a 1.30 60' @ 9.98.....(that's exceptional) I know I would'nt be touching the converter if it was me.
I think anything you find on top end will be negated by a loss in the 60'. That car works exceptionaly well in the first 1/8 mile, which is normally where a weak converter shows up most.... I would not screw with it, I think 9 times out of 10 you are probably going to slow car down with a verter change IMO.
The converter that's in the car now wont be touched so I can go back to the origional combo if needed, I am going to give this guy a try, he tell's me he can make it better, you don't learn nothing if you don't take a chance once in a while, just like I tryed another cam and that didn't make an improvement so I went back to the one you speced for me origionally.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Looking at a new converter..
[Re: RyanJ]
#437312
08/16/09 12:46 PM
08/16/09 12:46 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Ryan,won't be doing anything untill after Norwalk, but I have to try, or I wont be happy and will always question it, one thing about it if it don't work I can still get most of my money back out of it, and don't take me wrong I do understand what you are saying, for what I have it does run quite well, and I am quite pleased with it. Dan, I hear what you are saying, and if it does hit the tire harder and give me some traction issues, then that is more incentive to add a little (lot) more tire to the rear, like I have been thinking of doing anyway. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Looking at a new converter..
[Re: Garceau]
#437313
08/16/09 02:09 PM
08/16/09 02:09 PM
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Joined: Jun 2009
Posts: 877
ky
68roadrunner
super stock
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super stock
Joined: Jun 2009
Posts: 877
ky
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Quote:
Many of the big names use great parts and the converters are very similar and all done very well.
ATI probably has the most stock/super stock type wins. BTE is probably the fastest growing in the past ten years. Coan has always been a staple and I wouldnt hesitate to run one again.
Us as racers get way too caught up in the "size" of the converter. There is so much more than the size of the converter and its relation to what it does in our cars. A 9 inch that stalls at 5k is going to have different characteristics than an 8 inch that stall at 5k. Stator, fin angle all come into play and directly effect the stall and more importantly the top end efficiency.
Personally in a bracket car I like my converter a little on the loose side. I will loose some ET but gain a bunch of consistency.
I would call around and speak to every company you want to, and see which one speaks to you the best and you form the best working relationship with. Keep them and continue to use them unless you have a reason not to. Personally I have been going with BTE for the past 8 years or so, I like how I am treated, I like what they have done for sportsman bracket racing and I like the people running and building the converters. Are they the best? Depends on what you define best with........
Your converter is (IMO) the single most important piece of the puzzle to make all cars perform their best.
good thing somebody likes BTE. they couldn't fix anything i sent them.
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Re: Looking at a new converter..
[Re: dartman366]
#437314
08/17/09 02:07 PM
08/17/09 02:07 PM
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Joined: Jan 2003
Posts: 11,729
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,729
Portage,michigan
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Bill, looking at your numbers, you seem to have the car running as good as it can(you have it optimized)your 60 foot for a car that generally runs in the low 10's is as good as anybody's i have heard of.
based on what i see, if you want to go faster i would put a set of indy heads on it and be done with it. Your MPH isnt indicitave of the car Et going much further you have a good working setup that is giving you all it has on tap, IMO. i would be shocked if a convertor swap picked you up anything.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17
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