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Re: New video testing new converter
[Re: 340Cuda]
#2615958
02/02/19 02:06 PM
02/02/19 02:06 PM
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Joined: Oct 2011
Posts: 3,036
bean town ....Ca
WHITEDART
OP
master
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OP
master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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Shiloh,
I have heard seven inch converters can be very hard on the engines thrust bearing and that if you let off and get back on one at the finish line they sort of "unhook" and you lose propulsion.
Has that been your experience?
Thank you for sharing your experience with us.
Bill
. Bill honestly I can't say that I have experienced that issue it does sound plausible I honestly feel that a 7 inch converter is going to be the fastest way down the track that being said they have had a harder time nailing it down probably because of the two speed and the weight of the vehicle.. pulling it out and sending it back for a tune-up constantly becomes a headache.. the other problem that we have had with the seven inch converter is overheating the converter in one pass it will completely burn all the paint off the converter.. even after it being tuned up giving the Builder racepak information.. I bet a 3-speed with a perfect 7 inch converter would be scary fast... there are others on this board that have more experience with a 7-inch converter than me maybe they will chime in on the count of I'm kind of curious about your question as well Bill..
In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
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Re: New video testing new converter
[Re: dart games]
#2616074
02/02/19 06:13 PM
02/02/19 06:13 PM
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Joined: Aug 2003
Posts: 4,692
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,692
On the parachute mount
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small blocks always out run big blocks,only cars run that fast is chevys at my track,but theres only 2 mopars that run at my track What in the he!! Are you talking about ?
....BAD A$$ STREET CAR.....
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Re: New video testing new converter
[Re: WHITEDART]
#2616104
02/02/19 07:22 PM
02/02/19 07:22 PM
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Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
Plymouth340
mopar
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mopar
Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
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I just recently put a 7in converter in my W7 headed 394 small block. Trans temperature didn't seem to change from the 8in. RPM falls back to 7500 on the shift. And the car really liked it. picked up almost two tenths in the quarter mile. Its a 727 torqueflite.. Only have about 15 runs on it so far
Last edited by Plymouth340; 02/02/19 07:23 PM.
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Re: New video testing new converter
[Re: Plymouth340]
#2616426
02/03/19 02:17 PM
02/03/19 02:17 PM
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Joined: Apr 2003
Posts: 3,527
Tulsa, Oklahoma
340Cuda
master
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master
Joined: Apr 2003
Posts: 3,527
Tulsa, Oklahoma
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I just recently put a 7in converter in my W7 headed 394 small block. Trans temperature didn't seem to change from the 8in. RPM falls back to 7500 on the shift. And the car really liked it. picked up almost two tenths in the quarter mile. Its a 727 torqueflite.. Only have about 15 runs on it so far Sounds like you got a good one! Who built it?
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Re: New video testing new converter
[Re: 340Cuda]
#2616435
02/03/19 02:47 PM
02/03/19 02:47 PM
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Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
Plymouth340
mopar
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mopar
Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
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I just recently put a 7in converter in my W7 headed 394 small block. Trans temperature didn't seem to change from the 8in. RPM falls back to 7500 on the shift. And the car really liked it. picked up almost two tenths in the quarter mile. Its a 727 torqueflite.. Only have about 15 runs on it so far Sounds like you got a good one! Who built it? A-1
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Re: New video testing new converter
[Re: Plymouth340]
#2616450
02/03/19 03:21 PM
02/03/19 03:21 PM
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Joined: Oct 2011
Posts: 3,036
bean town ....Ca
WHITEDART
OP
master
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OP
master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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I just recently put a 7in converter in my W7 headed 394 small block. Trans temperature didn't seem to change from the 8in. RPM falls back to 7500 on the shift. And the car really liked it. picked up almost two tenths in the quarter mile. Its a 727 torqueflite.. Only have about 15 runs on it so far . Very impressive hot rod can you put it on a 29-10.5. And bring it out to muscle cars at the strip for the Mopar small Tire shootout.. we still need more cars
In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
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Re: New video testing new converter
[Re: WHITEDART]
#2616498
02/03/19 05:16 PM
02/03/19 05:16 PM
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Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
Plymouth340
mopar
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mopar
Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
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I just recently put a 7in converter in my W7 headed 394 small block. Trans temperature didn't seem to change from the 8in. RPM falls back to 7500 on the shift. And the car really liked it. picked up almost two tenths in the quarter mile. Its a 727 torqueflite.. Only have about 15 runs on it so far . Very impressive hot rod can you put it on a 29-10.5. And bring it out to muscle cars at the strip for the Mopar small Tire shootout.. we still need more cars that would be fun but I'm in iowa so probably not..
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Re: New video testing new converter . Updated
[Re: WHITEDART]
#2616509
02/03/19 05:38 PM
02/03/19 05:38 PM
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Joined: Jan 2003
Posts: 19,380
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,380
Las Vegas
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Shift at 8800 you want to get that fallback on the shift to be 80-8100 or a tad more. Some of that will be found in power numbers and tuning but IMO its still pretty tight. FWIW we run a billet 7" in the Vette. Shift 1-2 is earlier than 2-3. 1-2 is typically 95-9700 and 2-3 is usually 97-9900 with the "old combo". We typically see a 500 rpm drop on 1-2 and a 700 on 2-3. Still not perfectly happy with it and have now gone to a lockup deal. This is with a ProFlite behind the SB. FWIW never seen any issues with the thrust on a 7 converter. We have run one in the red car for a few years, and I have run one for a few years before that with the 99. Here is a pic of a racepack log from an 1/8 mile pass of 5.10 just for comparison sake. Clearly the tuneup was off a bit on this pass as well. 60- was only 1.15 
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: New video testing new converter
[Re: WHITEDART]
#2616554
02/03/19 07:04 PM
02/03/19 07:04 PM
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Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
Plymouth340
mopar
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mopar
Joined: Feb 2006
Posts: 501
CEDAR RAPIDS
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. I took out a 7in converter that would flash to 7300 . And drop to 7500 on the gear change.. this converter felt very mushy and the efficiency was not very good however it was fast.. it went a 119.2 /60 ft...with a 5.42. At 126mph . And would pick up another 33 mph on the back half.. at about 15% slippage.. I had an 8-inch built looking for a little more torque multiplication and a little more efficiency. It is slightly tighter at about 7100 rmp. I think it needs to be at about 7,500.. that being said it's still went its new best at 5.39 at 127.. we still had some ET left in the tune-up unfortunately the track wasn't up to the task also if you noticed it was smoking pretty heavily.. it was pulling in a . Hefty amount of oil into the intake track my fault I got that squared away now hopefully we can get it to a good track and get the car to run what Wallace says it should run.. what is your RPM at the finish line??
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Re: New video testing new converter
[Re: Plymouth340]
#2616560
02/03/19 07:17 PM
02/03/19 07:17 PM
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Joined: Oct 2011
Posts: 3,036
bean town ....Ca
WHITEDART
OP
master
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OP
master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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. I took out a 7in converter that would flash to 7300 . And drop to 7500 on the gear change.. this converter felt very mushy and the efficiency was not very good however it was fast.. it went a 119.2 /60 ft...with a 5.42. At 126mph . And would pick up another 33 mph on the back half.. at about 15% slippage.. I had an 8-inch built looking for a little more torque multiplication and a little more efficiency. It is slightly tighter at about 7100 rmp. I think it needs to be at about 7,500.. that being said it's still went its new best at 5.39 at 127.. we still had some ET left in the tune-up unfortunately the track wasn't up to the task also if you noticed it was smoking pretty heavily.. it was pulling in a . Hefty amount of oil into the intake track my fault I got that squared away now hopefully we can get it to a good track and get the car to run what Wallace says it should run.. what is your RPM at the finish line?? 7850 in the 1/8
In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
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Re: New video testing new converter
[Re: WHITEDART]
#2616683
02/04/19 01:20 AM
02/04/19 01:20 AM
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Joined: Aug 2003
Posts: 4,692
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,692
On the parachute mount
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Why are these converters so loose at the stripe ? Does a small block require such a loose stator to get it going in the 60 , 330?
....BAD A$$ STREET CAR.....
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