Anyone with MP 175k converter experience?
#902265
01/11/11 08:47 PM
01/11/11 08:47 PM
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Joined: Jan 2003
Posts: 3,616
Riverside, Ca
G_bob
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,616
Riverside, Ca
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I bought one of these MP 175K torque converters a few years back and stuck it on a shelf. I’m considering putting it in Mrs G-bob’s 64 fury vert. Specs are 426”, 9.6:1, with ported stealth heads, performer RPM and 770 cfm vac sec street avenger carb. Cam is comp XE275HL, .525 lift, 231/237 @ .050, 110 LSA, 106 ICL. Cam’s installed 4 degrees advanced. Combo made 459 hp @ 5500 and 485 ft lb at 4500. We set up an 8 ¾ with a 2.94 sure-grip and it’ll have 28” TA radials on it. Meant to be a highway cruiser. Expecting sustained cruise rpms of 2400-2500 or so. Wondering how loose this converter is. They never really published stall numbers on them. Any ideas on whether it will work ok in cruiser? Just wondering if there will be much (too much) slippage at cruise.  Planning to have it ready in time for a cruise up I-15 to MATS in April, although I've got a TON of work to do on it before then.  
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Re: Anyone with MP 175k converter experience?
[Re: G_bob]
#902267
01/12/11 12:22 AM
01/12/11 12:22 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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There is a formula to figure it out but I forget it... you know your torque and with the formula you can figure the stall based on the K factor EDIT here it is K = rpm / sqrt( torque ) rpm = K * sqrt( torque ) 
Last edited by MR_P_BODY; 01/12/11 12:26 AM.
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Re: Anyone with MP 175k converter experience?
[Re: G_bob]
#902269
01/12/11 01:03 AM
01/12/11 01:03 AM
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Joined: May 2005
Posts: 598
NC, USA
davenc
mopar
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mopar
Joined: May 2005
Posts: 598
NC, USA
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My opinion is that it will feel too "loose" for a cruiser. I had one behind my 470 in a Cuda, and it felt mushy. I am use to a manual trans, so perhaps it is just an adjustment, but I expect rapid response to throttle input. However given the torque of the motor and the loose converter, goosing the throttle did nothing but increase RPMs (that is, it only slipped) until over 4K.
My experience is that the formula that Mr.P Body posted was pretty close, with that converter in my car stalling a little over 4K. I found it annoying to be cruising at highway speeds, and goose the throttle and have nothing but an RPM increase. You really had to go deep into the throttle to feel response in the seat of your pants.
That Fury is fairly heavy and your motor is making good torque. My guess is that you will have a similar experience, particularly with the highway gears.
That converter is better suited behind a more mild engine from my perspective.
Dave
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Re: Anyone with MP 175k converter experience?
[Re: Quicktree]
#902272
01/12/11 05:24 PM
01/12/11 05:24 PM
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Joined: Nov 2008
Posts: 660
San Diego
formula S
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mopar
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Posts: 660
San Diego
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Quote:
that converter is no where near where it needs to be for that combo. will it run and drive, yes. will it give the best ET for the combo? No
Meant to be a highway cruiser. Expecting sustained cruise rpms of 2400-2500 or so. He never mentioned anything about ET. I do agree with you that if it were a car intened for the track it could use more converter and a bunch more gear
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Re: Anyone with MP 175k converter experience?
[Re: Quicktree]
#902273
01/12/11 05:27 PM
01/12/11 05:27 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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I think its going to be way above 2500 but I didnt do the formula on it EDIT should be close to 3850
Last edited by MR_P_BODY; 01/12/11 05:29 PM.
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Re: Anyone with MP 175k converter experience?
[Re: formula S]
#902275
01/12/11 07:15 PM
01/12/11 07:15 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
that converter is no where near where it needs to be for that combo. will it run and drive, yes. will it give the best ET for the combo? No
Meant to be a highway cruiser. Expecting sustained cruise rpms of 2400-2500 or so. He never mentioned anything about ET. I do agree with you that if it were a car intened for the track it could use more converter and a bunch more gear
this is the race section, not the highway cruise section 
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Re: Anyone with MP 175k converter experience?
[Re: G_bob]
#902277
01/12/11 10:54 PM
01/12/11 10:54 PM
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Joined: Feb 2004
Posts: 1,093
Long Beach, CA
Mike Swann
super stock
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super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
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Cam's too big or the ratio should be 3.55, IMO
8.30's @3400 lbs
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Re: Anyone with MP 175k converter experience?
[Re: Quicktree]
#902279
01/12/11 11:48 PM
01/12/11 11:48 PM
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Joined: Jan 2003
Posts: 3,616
Riverside, Ca
G_bob
OP
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OP
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Riverside, Ca
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Quote:
Quote:
Quote:
that converter is no where near where it needs to be for that combo. will it run and drive, yes. will it give the best ET for the combo? No
Meant to be a highway cruiser. Expecting sustained cruise rpms of 2400-2500 or so. He never mentioned anything about ET. I do agree with you that if it were a car intened for the track it could use more converter and a bunch more gear
this is the race section, not the highway cruise section
Sorry for the cruiser in the race section question, but this is where I hang out and knew I'd get the best info.
Besides, Mrs G-bob takes great pictures of race cars and this car is for her. 
We know the 2.94's are not going to be anywhere close to optimum for 1/4 or even 1/8 mile action, but I don't think this car will ever see a track.
It's a 64 fury convertible that I've been promising her for 3 years would be ready for MATS. As long as she can smoke the tires a little, and it cruises good, she'll be happy. 
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Re: Anyone with MP 175k converter experience?
[Re: G_bob]
#902280
01/13/11 07:58 AM
01/13/11 07:58 AM
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Joined: Dec 2009
Posts: 1,074
detroit, mi
POS Dakota
super stock
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super stock
Joined: Dec 2009
Posts: 1,074
detroit, mi
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wow! just checked out the fury on your site. I love it! Is that how it sits now, or is there more? If there's more, post up! 
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Re: Anyone with MP 175k converter experience?
[Re: G_bob]
#902281
01/13/11 08:19 AM
01/13/11 08:19 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Quote:
Quote:
that converter is no where near where it needs to be for that combo. will it run and drive, yes. will it give the best ET for the combo? No
Meant to be a highway cruiser. Expecting sustained cruise rpms of 2400-2500 or so. He never mentioned anything about ET. I do agree with you that if it were a car intened for the track it could use more converter and a bunch more gear
this is the race section, not the highway cruise section
Sorry for the cruiser in the race section question, but this is where I hang out and knew I'd get the best info.
Besides, Mrs G-bob takes great pictures of race cars and this car is for her.
We know the 2.94's are not going to be anywhere close to optimum for 1/4 or even 1/8 mile action, but I don't think this car will ever see a track.
It's a 64 fury convertible that I've been promising her for 3 years would be ready for MATS. As long as she can smoke the tires a little, and it cruises good, she'll be happy.
not a problem Bob like I said it will work if you already have it. if not I would go with a good 10"street converter.
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Re: Anyone with MP 175k converter experience?
[Re: Quicktree]
#902282
01/13/11 04:33 PM
01/13/11 04:33 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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I used the 166k lockup for a 904 in my 5th in front of both a 998 and an A500. car had a mild 360, stock long block, home ported heads, headers, RPM air gap, and a 600 eddie. gears were 3.55's, tires 27", car weight ~3900lbs w/o driver. The 166k would brake stall to about 2300 or so, and flash to about 2800. worked real well in the car for the combo. was a bit of a sloppy converter, engaging/disengaging lockup would drop cruise RPM by about 400 RPM. I miss that unit. I took it out when I replaced the 360 with a roller cammed, magnum headed 318 because I discovered cracks in the converter hub.
assuming you'd be similar weight, but more torque and more gearing, I'd say a 166K will stall even higher than it did in my lower power/lower torque environment, so I'd say the 175k is going to feel way to loose and sloppy for this combo, and probably flash to ~3500+....
if you were looking for a cheap converter, I'd probably start out looking at a factory high stall unit, I've seen those advertised for about $110....
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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