Yep already out,fits the rules, and made it a full season and a bunch of dyno testing, no issues at all.
No limit manufactureing In Wisconsin , for those wondering.
Head testing for pullers
- Thread starter lawnboy01
- Start date
Yep already out,fits the rules, and made it a full season and a bunch of dyno testing, no issues at all.
No limit manufactureing In Wisconsin , for those wondering.
They are making them but they are also the most expensive set that I'm aware of. Maybe this is one of those you get what you pay for.
It would be great to see a few different companies making these with different HP goals in mind and priced accordingly. Having several companies may make all heads a little more affordable for the average Joe.
Eric @ No Limit recommends a steel head for pullers, says they can't keep injectors seated in an aluminum head.
The aluminum heads will 'wear out' from extreme heat. To the point that the outer head studs will never tighten. The material mushrooms sort of. This is in extreme scenarios on kusileks truck, a level that 99℅ of us will never see.
Waglers solid aluminum heads have ductile iron inserts for the valve seats to make them last.
Waglers solid aluminum heads have ductile iron inserts for the valve seats to make them last.
Not ppl legal, if you are worried about that
And who knows when Comp cams will release theirs. They had no idea when I talked to them last year
Thanks for numbers on these, I might have my stockers with SoCal valves flow tested and posted for comparison... I'm not sure who has a bench locally to me, I'll do some asking around.
Wagler Ductile Iron are $7500 a pair complete with competition porting & valves.... No Limit are $12-$14k last time I asked, in a Super Stock pickup, they may be worth it, but average Joe can't justify nearly double the price. I know tractor guys, some of them have a nickname for Staab Machine (stab you in the ass machine) Lol! Not saying that's my opinion, but 50% of the pullers I bring his name up to tell me to make sure I'm "not paying too much"... But some say the same about REI (Riverside), big JD puller name...But they either love or hate... That's what pulling comes down too these days
Wagler Ductile Iron are $7500 a pair complete with competition porting & valves.... No Limit are $12-$14k last time I asked, in a Super Stock pickup, they may be worth it, but average Joe can't justify nearly double the price. I know tractor guys, some of them have a nickname for Staab Machine (stab you in the ass machine) Lol! Not saying that's my opinion, but 50% of the pullers I bring his name up to tell me to make sure I'm "not paying too much"... But some say the same about REI (Riverside), big JD puller name...But they either love or hate... That's what pulling comes down too these days
Anymore it seems like it's all in who you can actually get ahold of.... More than once too
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And if you can actually get the parts you ordered in a timely manner.
IMO bigger valves seem to be worth it. The reason I went with the solid iron heads is hopefully for reliability. Solid block and solid heads I'm hoping will put me in a happy place. We cracked two factory heads last season.
I would love to send my heads to someone that's know head porting. It looks like there is a lot of room for improvement on these iron heads. A cnc can only do so much
IMO bigger valves seem to be worth it. The reason I went with the solid iron heads is hopefully for reliability. Solid block and solid heads I'm hoping will put me in a happy place. We cracked two factory heads last season.
I would love to send my heads to someone that's know head porting. It looks like there is a lot of room for improvement on these iron heads. A cnc can only do so much
You would be amazed at what you can do with a stock head and someone that knows cylinder heads. The only problem is reliability. But the right setup and temperature control they will last a while
Great comparison Lawnboy01. Thank you. :thumb:
The industry has matured to the point that these comparisons will probably become more frequent. Perhaps we should establish/agree on some test procedures?
1) Bore size
2) Test pressure
3) Port volumes
4) Was the test fixture dimension-ally correct to a block? ie bore centers to dowel pin location? C clamping a head to a universal fixture is not repeatable for Duramax heads. They are very bore/location sensitive based on the relationship of the valve to the cylinder wall.
5) Was there a radiused entrance used on the intake?
6) Was there a pipe or exhaust manifold used on the exhaust?
7) Flow bench make and model.
A tool (flow bench) is only as good as the guy using it. After 35 years in the cylinder head industry, I've seen some pretty "interesting" test procedures.
The industry has matured to the point that these comparisons will probably become more frequent. Perhaps we should establish/agree on some test procedures?
1) Bore size
2) Test pressure
3) Port volumes
4) Was the test fixture dimension-ally correct to a block? ie bore centers to dowel pin location? C clamping a head to a universal fixture is not repeatable for Duramax heads. They are very bore/location sensitive based on the relationship of the valve to the cylinder wall.
5) Was there a radiused entrance used on the intake?
6) Was there a pipe or exhaust manifold used on the exhaust?
7) Flow bench make and model.
A tool (flow bench) is only as good as the guy using it. After 35 years in the cylinder head industry, I've seen some pretty "interesting" test procedures.
Would that stuff really matter since they were all tested the Same way? I see it could have variables in what it would actually do on a real engine, but if they test the same way each type, the winner would still win?
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No. For example, a small bore engine won't see the benefit of big valves if the valves are shrouded. But if you compare 2 cylinder heads on a flow bench using a larger bore, the larger valves will almost certainly show a big advantage.
Another critical element in Diesel applications is swirl. On the intake at least. But most people don't even talk about that.
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Great comparison Lawnboy01. Thank you. :thumb:
The industry has matured to the point that these comparisons will probably become more frequent. Perhaps we should establish/agree on some test procedures?
1) Bore size
2) Test pressure
3) Port volumes
4) Was the test fixture dimension-ally correct to a block? ie bore centers to dowel pin location? C clamping a head to a universal fixture is not repeatable for Duramax heads. They are very bore/location sensitive based on the relationship of the valve to the cylinder wall.
5) Was there a radiused entrance used on the intake?
6) Was there a pipe or exhaust manifold used on the exhaust?
7) Flow bench make and model.
A tool (flow bench) is only as good as the guy using it. After 35 years in the cylinder head industry, I've seen some pretty "interesting" test procedures.
Great post!