Rod and piston combination
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=124426
Printed Date: 28 Nov 2024 at 6:21am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Rod and piston combination
Posted By: bigcountrykustoms
Subject: Rod and piston combination
Date Posted: 11 Jun 2016 at 8:47am
|
I've got a late d-17 block with 4.5 inch bore and 5 inch stroke. If you've got the same displacement what did you do for a rod and piston combination? I'm in desperate need of knowing so I can let hapco know what I'm using before he welds my crank. Thanks much for any insights
|
Replies:
Posted By: mike a
Date Posted: 11 Jun 2016 at 11:22am
|
hope marty chimes in on this one
|
Posted By: dawntreader74
Date Posted: 11 Jun 2016 at 12:56pm
|
i used a 427'GM piston' W\ ac 190 XT rods bearing over bearing on crank' runs strong put together 8 years ago'
|
Posted By: patrickmull
Date Posted: 11 Jun 2016 at 5:13pm
|
do you have 5" or 6" stroke i thought fred's old engine was 6" if your going 5" i used d19 rods
|
Posted By: dawntreader74
Date Posted: 11 Jun 2016 at 11:23pm
|
the d19's will work on 6'' crank' like pat' said
|
Posted By: wi50
Date Posted: 13 Jun 2016 at 12:09am
So if hapco is welding the crank, it's the same amount of work to do it weather the stroke length is 5" or something else. But I've used billet rods I have a friend make, farmall h&350 rods and Chrysler rods. If I were doing it and not wanting to spend money on billets, I would use the Chrysler rods.
The buda rods people like to use are just plain short and would require a tall odd piston, and to short for a decent rod to stroke ratio in a longer stroke engine. They are great in some situations depending on what other parts you're trying to use but for this they wouldn't be a first choice.
-------------
"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
|
Posted By: wi50
Date Posted: 13 Jun 2016 at 12:12am
Depending on the rod used, it's also nice to lay the crank and cam out and mark & measure so the journals get positioned between the cam lobes if the rod is going to be wide enough to interfere with the cam lobes.
-------------
"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
|
Posted By: PaulB
Date Posted: 13 Jun 2016 at 10:15am
What Chrysler rods would someone be looking for? I should have some 440 6pack rods somewhere.
-------------
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
|
Posted By: Robacpuller
Date Posted: 13 Jun 2016 at 8:52pm
|
I used lnternational 350 rods, 6 inch stroke, 4.600 bore, big block Chevy piston 1.24 piston height. Merfeld did my cranke, he narrowed the rods. 9 years ago and still no problems. But I only run about 1800 rpms to 2000.
|
Posted By: wi50
Date Posted: 14 Jun 2016 at 9:41am
I've got a bunch of the rods around and vintage power wagon is an outfit that sells chrystler parts and has them on hand, 218,230,237,251 engines used connecting rods that used a 2.062" crankpin diameter and they were 7 13/16, 7 7/8, 7 15/15 and 8" lengths available. There's left and right offset rods as they have a slight offset of the beam to bearing bore. The wrist pin end is small, easy to hone to a .927" pin bore or I bore them in the mill with a reamer to get a .990" pin size. The rod bolts are 3/8" and easy to use an ARP bolt from a BBC application.
Depending on your block these rods will clear fairly well. Lots of common automotive pistons available and with these rod lengths it's easy to come up with a combination of cheap and available parts.
-------------
"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
|
Posted By: Larry(OH)
Date Posted: 14 Jun 2016 at 1:57pm
I take it those are the old flat head engines? Just found a stash of them a guy is selling off:) One says Turbofire )i think it was) on the head
-------------
'40 WC puller,'50 WD puller,'50 M puller '65 770 Ollie
*ALLIS EXPRESS contact*
I can explain it to you, BUT I cannot understand it for you!!
|
|