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| Any One Use the BHJ Products Mopar Torque Plate? https://slantsix.org/forum/viewtopic.php?t=67087 |
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| Author: | Walter Lee Jackson [ Mon Feb 13, 2023 10:45 am ] |
| Post subject: | Any One Use the BHJ Products Mopar Torque Plate? |
www.cylinderheadsupply.com/mp-6.html Mopar 170-225 Slant-6; Billet Steel; Std. Bore In Plate=3.520/3.525" "Head-bolt torque can dramatically distort cylinders and cylinders can not be bored or honed accurately if cylinder dimensions change so significantly after assembly. Rings won’t seal well and scuffing is likely to occur if the engine overheats. Use of BHJ Honing Plates rectifies all of these problems, leading to more consistent tolerances, better sealing and more power. The R Model Honing Plate is the established standard for duplicating cylinder bore distortion and is a must for any high performance engine application. Used by top machine shops, racing teams and racers alike, the R Model is acknowledged to be the finest, most accurate honing plate on the market today." It's expensive: $1,076.25 --Walt Jackson |
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| Author: | Greg Ondayko [ Mon Feb 13, 2023 11:26 am ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
People have used them. I am not sure about anyone here. If you have a scrap block laying around you can make one yourself with a sawzall and about $40 worth of blades. Have the machine shop deck it true on both sides. I did one like that in 2004. Still use it. |
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| Author: | CNC-Dude [ Mon Feb 13, 2023 12:03 pm ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
They do work...! Doug made a homemade like Greg's that worked good too. Don't feel you have to settle on a store bought one... |
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| Author: | Charrlie_S [ Mon Feb 13, 2023 12:52 pm ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
I used one I borrowed from Slant Cecil on one of my engines. I sold it to (I think team green) When I was selling parts for Cecil. |
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| Author: | volaredon [ Mon Feb 13, 2023 4:20 pm ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
For racing, hi revs etc I can see it. But for daily driver, low-medium rpm, mild build how much difference does using (or not) a torque plate during machining, make? |
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| Author: | CNC-Dude [ Mon Feb 13, 2023 4:28 pm ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
Just compare it to the bores being square if its honed without one once you torque the head. Now imagine the round rings trying to seal against a square hole....And that's whether the engine is a bone stock rebuild or a race engine! Better machine shops also know to torque the main caps when the block is bored as well, or the bottom portion of the cylinders will distort when the engine is assembled. We made a plate for the bell housing in our race engines when they were finish honed because without it, the number 6 cylinder would egg shape when you bolted the bell housing to the engine. Took a while to figure that one out... |
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| Author: | Dart270 [ Tue Feb 14, 2023 5:07 am ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
IMHO, if you are doing a mild/medium buildup, this is really not worth it. I have a deck plate like that and have only used it once. Can't say it was worth any HP, but peace of mind, sure. Spend your money on bigger valves and a good head porting job and you will be MUCH happier. To be specific: Take that $1100 and add it to whatever you would have spent on your head. The trick there is to find someone reliable (not a cheater/blowhard) who can do the port work. My 2 cents... Lou |
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| Author: | Charrlie_S [ Tue Feb 14, 2023 5:15 am ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
I agree with Lou. It is a matter of "bang for the buck". I did it because I had free use of the plate, and the machine shop only charged me a minimal amount additional. If you are a serious "class" racer, where every single horsepower and .001 sec counts, that is a whole nother ballgame. |
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| Author: | CNC-Dude [ Tue Feb 14, 2023 5:26 am ] |
| Post subject: | Re: Any One Use the BHJ Products Mopar Torque Plate? |
Yes, there are places that this money can be spent to have greater benefits. Many of the Slant records here have likely been set without using one. There are better bangs for the bucks out there for sure.... |
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