426 puling head
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=136121
Printed Date: 27 Nov 2024 at 6:53pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 426 puling head
Posted By: injpumpEd
Subject: 426 puling head
Date Posted: 12 Mar 2017 at 3:37pm
|
What are you guys doing on the 426 for valves? Our concern with porting/airflow, is how deep the valve sits below the surface, so won't flow much at all until half way opened up. Do IH 466 valves fit these very well? Thanks for the input. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Replies:
Posted By: NEVER green
Date Posted: 13 Mar 2017 at 9:23am
|
Hey Ed, my machinist went with (gasp) JD valves from a 5020, 2 inch intakes,forget the ex size. Those inconel and stainless one piece valves are pretty spendy arent they! As far as the valves being recessed I ground a wider angle around the valves and removed the swirl notch on the intake. I didnt think the valves were recessed to bad, did you ever see moline heads, now there are some shrouded valves! Do you have a flow bench? Without block filler 250cfm seems to be the number my machinist claims. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: injpumpEd
Date Posted: 13 Mar 2017 at 12:22pm
|
I do not have a flow bench, but am thinking about buying one, if I find a deal on one lol! I'm surprised the 5020 has 3/8" stems! I've been running stock 426 valves from agco, but do worry about dropping one. Inconel would be great if I could find a part number and supplier. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: NEVER green
Date Posted: 14 Mar 2017 at 9:25am
Call Wipeout in Ohio, can get any size inconel valves you want. 937 497 9473 They also have ported Allis heads, need lotsa cabbage! ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
injpumpEd wrote:Posted By: wi50
Date Posted: 14 Mar 2017 at 10:24pm
|
I have a little supply of inconel valves, 1.9" x 6.220 long .341" stem and I'd have to check the Grove to tip length, .300" guessing. If they'll work. (Take outs from our super) I think I give $60 a valve when I order them from Victory valves, I don't know what other outfits get. If you want a flow bench Ed, I have a super flow sf600 that I may part with. ------------- "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: 14 Mar 2017 at 10:26pm
|
If you give.me the dimensions. Ed, I can get them on an order. ------------- "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: injpumpEd
Date Posted: 15 Mar 2017 at 8:27am
|
Thanks Marty! I think after much discussion, the stock valves should be fine, and not my bottle neck. Pm me on what the flow bench would cost me. I've found one SF300 not too far, but it's priced out of my reasoning. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: NEVER green
Date Posted: 11 Apr 2017 at 8:31am
|
Ed, hows the porting going? Some free advice... fill the head with Rokblock, I ground into a water jacket in a area I didnt think there would be any coolant yesterday! It was the intake floor in the middle of the port. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: injpumpEd
Date Posted: 11 Apr 2017 at 11:08am
|
I've got a friend of mine that ports heads working on it. I didn't know he would work on a diesel head. He is finding all kinds of room for improvement. I gave him a wounded head he could cut up to look at the ports, and cooling passages. He is geting me valves with smaller stems, so we can get some of the plug out of the center of the valve pocket lol! I'm really optimistic about the way this old clunker might run this year! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: NEVER green
Date Posted: 12 Apr 2017 at 9:04am
|
Egads!!!! I was comparing two heads and noticed the castings are different after Ive been told by many no difference!! Looking down on the intake port between the push rod holes on the far less desirable heads the port tapers in towards the top making the top of the port a good 1/4 inch narrower. Thats huge, I hog my ports pretty thin in that area, those heads are junk for performance. I hope you got the good heads Ed! ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: Big Orange
Date Posted: 13 Apr 2017 at 10:55am
| AC 426 & 301 engines have 1.45:1 rockerarms. Installing 1.75:1 rockerarms + stiffer springs & pushrods, will greatly improve the performance, whatever head or porting or valves you have! |
Posted By: injpumpEd
Date Posted: 13 Apr 2017 at 12:16pm
|
I've had Murphy rockers on it for several years, along with several different grind cams. I stock and sell the Smith Bros pushrods for 301 and 426 AC, so that is also taken care of. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: LeonR2013
Date Posted: 27 Apr 2017 at 7:12am
| The race is on!!!!!!! |
Posted By: MACK
Date Posted: 21 May 2017 at 8:20am
| I went with smaller stems and dropped one. Went back with 3/8 could not tell any difference. MACK |
Posted By: NEVER green
Date Posted: 21 May 2017 at 8:57am
Ouch!!!! Were they one piece valves? ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |
Posted By: MACK
Date Posted: 21 May 2017 at 10:08pm
| They were stainless steel. MACK |
Posted By: injpumpEd
Date Posted: 22 May 2017 at 7:35am
|
these valves are supposed to be inconel, basically what top fuel drag cars use. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |