Re: hughes engines sb stud girdle
[Re: mopar dave]
#1743343
02/01/15 10:42 AM
02/01/15 10:42 AM
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Joined: May 2004
Posts: 1,522 Ste-Sophie, Quebec, Canada
Wedgeman
pro stock
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pro stock
Joined: May 2004
Posts: 1,522
Ste-Sophie, Quebec, Canada
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Dave, I feel thhat if the bottoom is tied together, stress to the crank and caps every time a cylinder fires is shared by the others, making it stronger overall, especially if there is Nitrous in the equation.....
Then again I may be wrong...............
As for installion and milling, I don't know, I left that to my machinist.
Dan
'67 Barracuda best 60ft 1.30 sec 6.40sec 1/8 mile pump gas, 10.8 cr Indy heads
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Re: hughes engines sb stud girdle
[Re: Wedgeman]
#1743344
02/01/15 11:22 AM
02/01/15 11:22 AM
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Joined: May 2006
Posts: 1,260 New Mexico
Adobedude
pro stock
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pro stock
Joined: May 2006
Posts: 1,260
New Mexico
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Ryan Johnson said they are pretty much worthless in a SB
2001 Dodge Dakota 408 All Motor 11.27 @ 117.83 mph 2017 NM Mopar Challenge Series Champion.
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Re: hughes engines sb stud girdle
[Re: Adobedude]
#1743345
02/01/15 11:52 AM
02/01/15 11:52 AM
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Joined: May 2004
Posts: 1,522 Ste-Sophie, Quebec, Canada
Wedgeman
pro stock
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pro stock
Joined: May 2004
Posts: 1,522
Ste-Sophie, Quebec, Canada
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I don't want to state who is right or wrong....
I just used my good sens to build a bullet proof bottom for 7000rpm engine and not worry....
The small block get a lot of twisting above 600hp, and 7k, so I put every thing to keep it together....If they use it in big block, high rpm, it should as good in a lighter small block stroker....see my point ?
Too bad there are no tests or more infos on the matter......just experience
Dan
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Re: hughes engines sb stud girdle
[Re: knyech1]
#1743349
02/01/15 01:09 PM
02/01/15 01:09 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:
Quote:
anyone here have any experience with hughes sb stud girdle? i'm curious to how effective it is.
From what I recall, Dizuster did not have a girdle when he first threw a turbo on his 360. When he opened it up he discovered that he was having main cap walk. He put a girdle in it and is not having any problems, and I think he's at higher boost levels now that he was running before.
But also Scott was running some higher timing that sure didnt help cap walk.... myself... I dont use the girdles but I also try to build light weight rotating systems so it basically eliminates the problem from the source... I turn even my stock blocks in the 7800 rpm range and a lot of 8200... my R3 block I took it to 9600 a few times
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Re: hughes engines sb stud girdle
[Re: mopar dave]
#1743353
02/01/15 06:42 PM
02/01/15 06:42 PM
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Joined: Jan 2003
Posts: 2,129 Vermont
TrWaters
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,129
Vermont
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For what its worth. I sell both a 9 point and a 10 point girdle for early hemis. The bottom end is almost identical to a small block. Here is a write up when one was install on the early hemi EMC engine.
Tom Waters Girdle by dan miller » 13 Nov 2009 10:17
We were having trouble with the front main cap moving around on our 354 EMC early hemi. The engine is partially filled, cyro treated, and has 4 bolt splayed main caps on the center three mains.
We had no issues up to about 550 horsepower. We noticed metal transfer on the front main cap at around 575 horsepower, and it started to become an issue at 600 horsepower. We installed a Tom Waters girdle and made 121 pulls, many over 650 horsepower. Upon tear down, we observed that the front main is now solid. Zero movement/issues.
We also installed one of Tom's girdles on our Junior Fueler, about 850 or so horsepower. At these power levels, main cap movement is a fact of life, and one just has to live with it. We only have about ten passes on it (and haven't torn it down yet), so it's probably too early to tell, but I'll advise when we see something. It might not cure things, but I'm betting that it will be of significant help.
A very nice product. Inexpensive, very high quality, came with all parts necessary, installed easily - a true bolt on. I highly recommend it.
Danny UPDATE We run the JrFueler @ approaching 900 hp, and have zero issues. The mains walk around a little, but much less with the girdle. We have about 40 passes on a new block, and there is main cap movement, but significantly less than without the girdle.
TR Waters
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Re: hughes engines sb stud girdle
[Re: Wedgeman]
#1743355
02/01/15 07:43 PM
02/01/15 07:43 PM
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Joined: Jan 2005
Posts: 3,635 Oakland, MI
dizuster
master
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master
Joined: Jan 2005
Posts: 3,635
Oakland, MI
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To clarify mine had a minimal amount of cap walk on a few cylinders, and never really any signs of detonation on the plugs/pistons. However it DID have a lot of cylinder pressure that collapsed the piston.
But what was most alarming is the odd bearing wear that was obviously caused by the cap moving/crank bending. It was warn down to the "gold" in the bearing on the inner edge, opposite of each cylinder. Meaning that at/near TDC the rod had so much compression on it, it was actually pulling the caps off center, and literally "tilting" them on the compression stroke.
I haven't had the pan back off the car yet after the re-fresh, so I can't say how effective it was. But I will be VERY surprised if tying everything together didn't help the caps from waving in the wind, like they were doing the last time.
I'm running a bit less boost then I did before (16psi vs. 20psi before), but with more power (better heads/cam, makes about 80~100hp more), so I am certain it isn't any easier on the motor now then it was then.
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