Board index Flathead Power-Technical Questions, Answers, and Suggestions K-Models KR Intake manafold

KR Intake manafold

Moderators: Curt!, Pa

Post Sat Apr 15, 2006 8:09 pm

Posts: 2685
Location: Los Angeles, CA
I have a friend looking for a KR Intake manafold. He has a WR intake for trading.
TIA

Post Sun Apr 16, 2006 10:57 am

Posts: 2399
Location: atascadero cal usa
what was the diff of the 2?

Post Sun Apr 16, 2006 10:58 am
xlr

Posts: 149
Location: calif
wr 3 bolt kr 4

Post Sun Apr 16, 2006 11:53 am

Posts: 2685
Location: Los Angeles, CA
I have no idea what either look like as I am not into racers. I do know the one he has, has a casting number 428-402 on it and it is for a four bolt carb.

Post Sun Apr 16, 2006 12:03 pm
xlr

Posts: 149
Location: calif
hi wrs used 3 bolt for mr 3. kr used 4 bolt for mr 4. that is right casting# for kr mr 4. but also will work on wr. also k and kh came stock.

Post Sun Apr 16, 2006 1:08 pm

Posts: 2685
Location: Los Angeles, CA
So you are saying that a KR with shorter cylinders uses the same intake as a standard K & KH?

Post Sun Apr 16, 2006 1:25 pm

Posts: 767
Location: CA USA
Chris,
That casting # will work on the KR. It also fits all WR motors. If my memory serves me all the MR carbs are 4 bolt except the MR2. 'dog

Post Sun Apr 16, 2006 1:37 pm

Posts: 55
Location: west coast
Chris
Not short barrels, std barrels, KR or K

Post Sun Apr 16, 2006 3:49 pm
panic

All 1940-65 WLDR, WR, K, KH, KR used the same 4 bolt manifold. Many race manifolds were polished, don't know if it's factory.

Post Sun Apr 16, 2006 4:16 pm

Posts: 587
Location: Crewe, Great Britain

Hi All,

Yeah, K, KH, KR, WR, all the same 4 bolts manifold, part# 27020-40...

However, I've seen the majority of them in cast steel but also a few rarer ones cast in brass... Anybody knows where the brass ones come from???

Patrick

Post Sun Apr 16, 2006 4:26 pm
panic

The same length manifold fist both the K and KH barrels despite the 3/8" height difference because the KH ports are longer.

Post Sun Apr 16, 2006 4:52 pm

Posts: 3117
Location: Central Illinois, USA
The only difference that I have observed in cast 4-bolt manifolds is that some have indented numbers, while others have raised numbers.

The brass thing is still confusing, although I suspect they must be postwar as the material was too strategic.

...Cotten

Post Sun Apr 16, 2006 5:33 pm

Posts: 2685
Location: Los Angeles, CA
OK. a few things here.
First off the brass manifolds are from early 1941.

My friend has two different KR engines torn down right now. The KR has shorter cylinders and different flywheels marked with an R. The other engine, which is a KRTT, has longer cylinders and different heads. Does this make any sence?

He has two cast iron manifolds. Neither polished. One with raised numbers and the other depressed.
So I guess one of these will work on his KR.

Post Sun Apr 16, 2006 6:06 pm

Posts: 55
Location: west coast
Chris, your friend has something unfactory, I do believe. The one with the longer barrels may be a KHRTT, or one someone put together, or he may have a short barrel KR, that we were talking about here a couple of weeks ago. You should measure those barrels, and get the info on here. Then these guys will know exactly what you are dealing with. A KR and a KRTT, should be same barrels.

Post Sun Apr 16, 2006 7:41 pm
xlr

Posts: 149
Location: calif
yes kr krtt same barells. khr khrtt longer. but wr k kh kr khr can use same manifold. yes they made brass manifold i have a nos one. is plated. i was wrong went looked mr3 4 bolt mr 4 4 bolt. mr 2 was 3 bolt. i have 2 mr 2 linkerts. all short rod krs i have seen maby 9 sets have sepecial manifolds. some have tubes welded onto barrels. i have schbler alum carb to. is barrell carb.

Post Mon Apr 17, 2006 2:08 pm

Posts: 919
Location: RENO,NV. U.S.A.
Panic is right;the brass/bronze intakes are early ('41)WR,all K intakes interchange and are 4 bolt,polished intakes started on the KHK's.Taller cylinders are definitely KH ,no way around that. BREWSKI

Post Mon Apr 17, 2006 3:17 pm

Posts: 2685
Location: Los Angeles, CA
I guess the question now is which manifold is correct for a 1956. The raised or depressed 428-402 casting numbers?

Post Tue Apr 18, 2006 5:00 pm

Posts: 919
Location: RENO,NV. U.S.A.
I own a WR(brass) intake,several K intakes and even a '68-'69 twin carb intake. Just guessing I would say the stamped #'s are a replacement(over the counter) part as I have never seen one. BREWSKI

Post Wed Apr 19, 2006 6:21 pm

Posts: 2685
Location: Los Angeles, CA
So the WR intake manifold is the same as K and KR? All have the 428-402 casting number on them? Which came first. Raised casting numbers or depressed casting numbers? Which is correct for a 1956 KHTT?

Post Wed Apr 19, 2006 7:08 pm
xlr

Posts: 149
Location: calif
depressed


Return to K-Models