Slant Six Forum
https://slantsix.org/forum/

Valves? We don't got no stinking valves!
https://slantsix.org/forum/viewtopic.php?t=62669
Page 2 of 2

Author:  slantzilla [ Fri Aug 03, 2018 9:25 pm ]
Post subject:  Re: Valves? We don't got no stinking valves!

One of my Jeffrey heads has Ford valves in it, the other one has Ferrea's.

Author:  coconuteater64 [ Sat Aug 04, 2018 9:50 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

Quote:
Quote:
Quote:

Not much! Especially between the intake and exhaust ports. Ask me how I (And others) know! :D :D
I have photographic evidence of the mishap if needed!
Pics say a thousand words! My machinist guy is excited about working on something other than a V8. I'm kinda excited myself.
There are those Band Sawed Heads threads on the Engine FAQ page. Those might be helpful.
Yikes! Not too much meat in there. I think I might just do a little blend work around the bowl and be satisfied with that. It's not going to be a high RPM engine.

Author:  coconuteater64 [ Sat Aug 04, 2018 9:52 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

Quote:
Mopar big block exhaust valves (Sealed Power #V1900) are 3/8" stem, 1.74" dia and are only 0.100" too tall.
I am using a set as intake valves on my slant head. I can easily shave off the extra length to keep everything even height-wise.
Thanks! These look promising.

Author:  sandy in BC [ Sat Aug 04, 2018 10:04 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

You cant shorten valves without wrecking the heat treatment on the tips....

Author:  coconuteater64 [ Sat Aug 04, 2018 1:46 pm ]
Post subject:  Re: Valves? We don't got no stinking valves!

Hmmm, there goes that idea.

Author:  sandy in BC [ Sat Aug 04, 2018 2:25 pm ]
Post subject:  Re: Valves? We don't got no stinking valves!

Longer valves are fine …..

On my Chev valve head I used Chev springs and keepers and locks. The shop machined the head to get the right spring height. After all was said and done I used some correct length Smith Bros pushrods to stay in the correct lash range on the rockers.

Note: My 1.72/1.50 valves were large enough that I chose to radius the chambers around the valves (Victoria Vertical mill). This is done before the machine shop does a bowl hog and valve grind.
A little carbide work and things start to look like one of Mikes heads.


mock it up …..cc the chambers...and decide how much to mill (either head or block) for compression

There is plenty of meat below the valve seats for a bowl hog. I asked the shop for a standard stock car bowl hog for the size of valves I supplied.

Author:  Rick Covalt [ Sat Aug 04, 2018 3:28 pm ]
Post subject:  Re: Valves? We don't got no stinking valves!

.100 may be fine ? You will need a valve job anyway and if they keep the new valves as high in the chamber as they can you will likely be fine. I'd try it.

Author:  Dart270 [ Sun Aug 05, 2018 1:52 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

I have 3-4 heads with Chevy 1.72/1.50 valves and they have done long service in road-driven and raced cars. You will need shorter pushrods, almost certainly, although you can get by with stockers for a little while. With stockers, and especially with a milled head, the rocker adjusters get near the end of their ranges and can back out - ever run a Slant 6 on 2-3 cyl down the hwy with some backed out/dropped/bent pushrods?

Lou

Author:  coconuteater64 [ Mon Aug 06, 2018 8:13 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

Lee at SIValves said the SEV-2309-5 oversize exhaust valves and SEV-2310-5 intake valves won't be available until next year. I got to playing around on the interwebs and found an Elgin E1821b valve that might be promising, so I ordered a single valve to play with. Here's what they say about them:
OEM-style replacement exhaust valves for 1974-87 Ford 2300cc 140ci 2.3L SOHC engines with specs shown below. P/N E1821B. Valve specs are as follows:
Head Diameter: 1.500"
Stem Diameter: .3414"
Overall Length: 4.787"
Tip to Groove Length: .3779"
4-Groove Stem

Whaddaya think?

Author:  Badvert65 [ Mon Aug 06, 2018 10:16 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

I have used these Sealed Power valves. They are originally for some various ford applications.
They will require new valve guides.
Attachment:
Slant-OSValves.JPG
Slant-OSValves.JPG [ 35.92 KiB | Viewed 4483 times ]
jus' sayin'

Author:  coconuteater64 [ Mon Aug 06, 2018 10:57 am ]
Post subject:  Re: Valves? We don't got no stinking valves!

Quote:
I have used these Sealed Power valves. They are originally for some various ford applications.
They will require new valve guides.

Slant-OSValves.JPG

jus' sayin'
That's good to know! Did you have to use different springs, etc.? Seems like those would be a good fit. I need valve guides regardless of what I do, so that's no problem.

Author:  Badvert65 [ Mon Aug 06, 2018 12:42 pm ]
Post subject:  Re: Valves? We don't got no stinking valves!

I just had to get new keepers and retainers. I could probably have gotten by with my original retainers. I used the HP 340 valve springs.
-Matt

Author:  coconuteater64 [ Mon Aug 06, 2018 12:51 pm ]
Post subject:  Re: Valves? We don't got no stinking valves!

Thanks!

Page 2 of 2 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/