Moparts

Rod bolt stretch guage??

Posted By: Moparnut426

Rod bolt stretch guage?? - 09/12/09 02:17 AM

Whos should I buy? ARPs, Jegs, or pro form? Whos sells the best one, Price really doesnt matter they are from 45-160 bucks.

Kasey
Posted By: S/ST 3040

Re: Rod bolt stretch guage?? - 09/12/09 02:27 AM

I got mine from Goodson. Make sure you get one with this design. (one piece frame)
Oliver sells one like this now. (didn't used to) Probably several out there sell the same one.

Attached picture 5477146-DSCN1801.JPG
Posted By: Moparnut426

Re: Rod bolt stretch guage?? - 09/12/09 02:31 AM

That looks identical to the ARP one for sale on Ebay. Can I ask How much that was, and is it pretty user friendly?? How stiff is the spring/clamp in the dial indicator?

Kasey

Thanks by the way
Posted By: S/ST 3040

Re: Rod bolt stretch guage?? - 09/12/09 02:39 AM

I don't remember how much. My new Goodson catalog is MIA.

The spring in it is fairly stout and repeats very well.

The same company probably makes the all for ARP, Oliver, Goodson, etc.
Posted By: Moparnut426

Re: Rod bolt stretch guage?? - 09/12/09 02:45 AM

Thanks man, this is the only way I guess to properly torque my Childs track master rods. I was going to use incriments from 30, 50 then to 70 ft/lbs, but I have decited to do it correctly and buy the tool. Ill buy the one off Ebay...

Thanks

Kasey
Posted By: Cab_Burge

Re: Rod bolt stretch guage?? - 09/12/09 05:31 AM

Kasey, check every bolt and write down the torque it takes to make the stretch you want. I try and hit the middle of the stretch, IE if it says .0056 to .0062 I shoot for the middle .0059 if the bolts are new follow the rod bolt makers suggestion on the initial use Also if they are new write down the free length before stretching them
Posted By: Moparnut426

Re: Rod bolt stretch guage?? - 09/12/09 03:58 PM

Cool, thanks,,, Does anyone here know what the correct "stretch" is on my child and alberts track master rods with childs 7/16 cap screws??

Kasey
Posted By: moparlulu

Re: Rod bolt stretch guage?? - 09/12/09 07:56 PM

This would be all moot if the rods were torqued to a given number of lbs and then sized at the machine shop, would it not?? Stretching the bolt could and can change the size verses torquing.
Posted By: Moparnut426

Re: Rod bolt stretch guage?? - 09/13/09 01:05 AM

Well these are accually childs bolts, I dont know exactly what thay say as they are at the machine shop. Im thinking of buying new ARP 5000 bolts and running them so I know exactly what they should be torqued to.

Kasey
Posted By: moparlulu

Re: Rod bolt stretch guage?? - 09/13/09 01:47 AM

Ok, if you change to arps wouldn't you need to do it before sizing?? as rod bolt "A" may only be torqued to 50 as per mfg or .000?? stretch and rod bolt "B" is 60lbs or .000??stretch which could alter you final size.
Posted By: topside

Re: Rod bolt stretch guage?? - 09/13/09 01:49 AM

We sell the lightest one on the market, reads to .0001, proprietary design, developed & used on our own motors.
PM me here or email me at topside340@yahoo.com if you're interested.
$60.00 + $11.50 shipping by USPS Priority Mail with Delivery Confirmation.

Attached picture 5478873-stretch.jpg
Posted By: Anonymous

Re: Rod bolt stretch guage?? - 09/13/09 02:15 AM

Quote:

We sell the lightest one on the market, reads to .0001, proprietary design, developed & used on our own motors.
PM me here or email me at topside340@yahoo.com if you're interested.
$60.00 + $11.50 shipping by USPS Priority Mail with Delivery Confirmation.



what is the guaranteed parallelism from point to point?
Posted By: Moparnut426

Re: Rod bolt stretch guage?? - 09/13/09 04:03 AM

Quote:

Quote:

We sell the lightest one on the market, reads to .0001, proprietary design, developed & used on our own motors.
PM me here or email me at topside340@yahoo.com if you're interested.
$60.00 + $11.50 shipping by USPS Priority Mail with Delivery Confirmation.



what is the guranteed parallism from point to point?



Yeah what he said???

Posted By: Anonymous

Re: Rod bolt stretch guage?? - 09/13/09 07:46 AM

Quote:

Quote:

Quote:

We sell the lightest one on the market, reads to .0001, proprietary design, developed & used on our own motors.
PM me here or email me at topside340@yahoo.com if you're interested.
$60.00 + $11.50 shipping by USPS Priority Mail with Delivery Confirmation.



what is the guaranteed parallelism from point to point?



Yeah what he said???



Posted By: topside

Re: Rod bolt stretch guage?? - 09/13/09 04:04 PM

They're drilled & tapped in a fixture and each one is tested after assembly. You'd have to have ridiculous deflection, say .250, to affect the measurement by .001, basically impossible.
Posted By: Cab_Burge

Re: Rod bolt stretch guage?? - 09/13/09 05:27 PM

Quote:

Quote:

We sell the lightest one on the market, reads to .0001, proprietary design, developed & used on our own motors.
PM me here or email me at topside340@yahoo.com if you're interested.
$60.00 + $11.50 shipping by USPS Priority Mail with Delivery Confirmation.



what is the guaranteed parallelism from point to point?

Who cares as long as they look ike they are aligned Your turn
Posted By: Anonymous

Re: Rod bolt stretch guage?? - 09/13/09 05:44 PM

Some of the best shops in the world have these gauges sitting on the shelf. They got them, used them, tested them against what they had been doing for years and then the tool found its way to the back of the tool closet. They are like trans temp gauges--you get one--run a few races , then see what happens when and how--then you don't need one again. They are a good test to see what is really happening when you torque bolts the way that you always do but if you have a good torque wrench that is calibrated for the numbers you use and you always do it the same way with the same lube etc--I don't think you will ever fail a bolt or rod because you did not have a gauge---we have the tool to check our wrenches and the technique of the user ALWAYS makes more diff than the calibration which is never far off. A $50 Sears or Lowes wrench can often be as good as a $400 Snap On or Mac based on our test. An experienced engine builder can tell when a rod bolt does not feel right during the tightening procedure--the you discard it, replace it, check and touch up the rod and keep going---The LACK of quality we put up with on ALL brands of bolts is the trouble--you get a softie every now and then so a gauge will not tell an inexperienced user that the bolt is no good. So..IMO back yard twice a year builders just save your $$. OK...let the poo fly.
Posted By: mac56

Re: Rod bolt stretch guage?? - 09/13/09 06:10 PM

Quote:

Some of the best shops in the world have these gauges sitting on the shelf. They got them, used them, tested them against what they had been doing for years and then the tool found its way to the back of the tool closet. They are like trans temp gauges--you get one--run a few races , then see what happens when and how--then you don't need one again. They are a good test to see what is really happening when you torque bolts the way that you always do but if you have a good torque wrench that is calibrated for the numbers you use and you always do it the same way with the same lube etc--I don't think you will ever fail a bolt or rod because you did not have a gauge---we have the tool to check our wrenches and the technique of the user ALWAYS makes more diff than the calibration which is never far off. A $50 Sears or Lowes wrench can often be as good as a $400 Snap On or Mac based on our test. An experienced engine builder can tell when a rod bolt does not feel right during the tightening procedure--the you discard it, replace it, check and touch up the rod and keep going---The LACK of quality we put up with on ALL brands of bolts is the trouble--you get a softie every now and then so a gauge will not tell an inexperienced user that the bolt is no good. So..IMO back yard twice a year builders just save your $$. OK...let the poo fly.


Mine made it to the back of the tool box before I ever used it. I bought it before I realized my C&A rods have a blind hole.
Posted By: Anonymous

Re: Rod bolt stretch guage?? - 09/13/09 08:35 PM

Quote:

They're drilled & tapped in a fixture and each one is tested after assembly. You'd have to have ridiculous deflection, say .250, to affect the measurement by .001, basically impossible.



i was just asking a simple question. i've seen some stretch guages that are not parralel from end to end. that causes big problems with repeatability.
so back to your remark; if you had even .005 of deflection, the guage would be worthless. a lot of things are made in fixtures, that doesn't meen they're made right, or are accurate. your guages are probably just fine but i felt the need to express my thoughts after your .250 deflection remark.

and for the guys that toss them in the box and don't use them any more, stop being so lazy and do it right.
Posted By: dartman366

Re: Rod bolt stretch guage?? - 09/13/09 09:07 PM

I bought mine at Jeg's (their brand) and have used it a couple of time's and will continue, the one nice thing is if you check all of them and you have one bolt that stretches the proper amount at a vastly lower torque value then that one would be suspect and replaced also if you know the length when new or before you break them loose and check them after use that will let you know if they are all stretched and have come to the end their useful life, I think it's a worthwhile investment.
Posted By: Anonymous

Re: Rod bolt stretch guage?? - 09/13/09 09:36 PM


The way I do it
© 2024 Moparts Forums