Ti valve modifications...

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Krooser
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Ti valve modifications...

Post by Krooser » Sun Oct 08, 2017 11:59 am

Ok... So I won a set of RO7 Ti valves on fleabay for a ridiculously low price.

Now what do I do with them...

I sure would like to shorten them to use in one of my oval track project engines... Not so I can run 8 grand but just to get a handle on how they will work in my low budget motors.

They are about an inch too long. I stopped by my local racer friendly machine shop yesterday but he said his machines aren't set up to do the work... He's mostly doing production cnc work now.

So I'm asking for some advice from you seasoned machinists... How can you get this done? What kind of a setup would you need to have?

Can I run these without hard tips but use lash Caps or something like Mantons lash locks ( I know some of the pros and cons of those, too)?

Thanks in advance...
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Re: Ti valve modifications...

Post by pamotorman » Sun Oct 08, 2017 12:11 pm

cut them down and press in these hardened tips
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Re: Ti valve modifications...

Post by Krooser » Sun Oct 08, 2017 12:53 pm

Well that's too easy....

Who makes those caps?
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Re: Ti valve modifications...

Post by pamotorman » Sun Oct 08, 2017 12:59 pm

Krooser wrote:
Sun Oct 08, 2017 12:53 pm
Well that's too easy....

Who makes those caps?
check with the valve manufactures. goggle and it may come up.

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Re: Ti valve modifications...

Post by Krooser » Sun Oct 08, 2017 2:02 pm

Thanks Pamotorman... These things might work...
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Re: Ti valve modifications...

Post by BILL-C » Sun Oct 08, 2017 2:43 pm

An inch is alot to take off of the end of a ti valve. You sure you're not going to be into the moly stem with your valve lock grooves?
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Re: Ti valve modifications...

Post by perfconn » Sun Oct 08, 2017 5:07 pm

Send them to Precision Products in N.C. and tell them what to do.Usually $100.00 a set.You can't put hardened tips in anything smaller than 5/16.

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Re: Ti valve modifications...

Post by Warp Speed » Sun Oct 08, 2017 6:17 pm

perfconn wrote:
Sun Oct 08, 2017 5:07 pm
Send them to Precision Products in N.C. and tell them what to do.Usually $100.00 a set.You can't put hardened tips in anything smaller than 5/16.
Do this ^^^^^, (have them cut for a radius lock groove) and run standard lash caps.
Pretty common, used to do it all the time with used cup valves.

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Re: Ti valve modifications...

Post by racear2865 » Sun Oct 08, 2017 6:41 pm

Warp Speed wrote:
Sun Oct 08, 2017 6:17 pm
perfconn wrote:
Sun Oct 08, 2017 5:07 pm
Send them to Precision Products in N.C. and tell them what to do.Usually $100.00 a set.You can't put hardened tips in anything smaller than 5/16.
Do this ^^^^^, (have them cut for a radius lock groove) and run standard lash caps.
Pretty common, used to do it all the time with used cup valves.
Warp
what is the radius of a radius lock groove
reed

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Re: Ti valve modifications...

Post by Krooser » Sun Oct 08, 2017 10:40 pm

Warp Speed wrote:
Sun Oct 08, 2017 6:17 pm
perfconn wrote:
Sun Oct 08, 2017 5:07 pm
Send them to Precision Products in N.C. and tell them what to do.Usually $100.00 a set.You can't put hardened tips in anything smaller than 5/16.
Do this ^^^^^, (have them cut for a radius lock groove) and run standard lash caps.
Pretty common, used to do it all the time with used cup valves.
Man at a $100.00 per set I'm still golden... I didn't buy these for any one particular engine... I have two Mopar's that I'm working on for 2018. I guess I'll try to match them up with whatever they will work best on.

These Ti intakes are 6.00" long w/6mm stems... the Ti exhausts are 5.70" w/7mm stems. Those 6mm's may be a problem to get fitted for hardened tips... I need them to be about 4.95" for one engine and 5.050/5.075 for another. Std lash caps would work it seems if I can find some. I've been looking thru the Trend catalog tonite doing some planning.

Thanks for all the input...
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Re: Ti valve modifications...

Post by PackardV8 » Mon Oct 09, 2017 12:00 pm

Last I investigated a similar modification, it was mentioned most TI valves have a DLC coating and disturbing the coating, whether by changing the head diameter or cutting into the stem for a shorter groove is a BAD THING.
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Re: Ti valve modifications...

Post by Krooser » Mon Oct 09, 2017 9:46 pm

PackardV8 wrote:
Mon Oct 09, 2017 12:00 pm
Last I investigated a similar modification, it was mentioned most TI valves have a DLC coating and disturbing the coating, whether by changing the head diameter or cutting into the stem for a shorter groove is a BAD THING.
Looks like I can get small parts like valves recoated for something like $50.00 or so... I'm going to check with some local outfits around home who do industrial hard coatings to see if they can handle a small order.

http://racetechtitanium.com/shop/index. ... cts_id=570
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Re: Ti valve modifications...

Post by MadBill » Mon Oct 09, 2017 9:52 pm

Would that be per valve, or ?? :?
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Re: Ti valve modifications...

Post by Krooser » Tue Oct 10, 2017 6:40 am

Don't think so Bill... Not sure how they do the coatings as I believe there are different processes that will work but it seems they do "batches" of parts... I'll call today.
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Re: Ti valve modifications...

Post by PackardV8 » Tue Oct 10, 2017 1:45 pm

Krooser wrote:
Mon Oct 09, 2017 9:46 pm
PackardV8 wrote:
Mon Oct 09, 2017 12:00 pm
Last I investigated a similar modification, it was mentioned most TI valves have a DLC coating and disturbing the coating, whether by changing the head diameter or cutting into the stem for a shorter groove is a BAD THING.
Looks like I can get small parts like valves recoated for something like $50.00 or so... I'm going to check with some local outfits around home who do industrial hard coatings to see if they can handle a small order.

http://racetechtitanium.com/shop/index. ... cts_id=570
Hope they can do it for you but all the coating shops I've discussed it with say, "No used parts, no way, no how; too much risk of contamination. New, virgin metal only."
Jack Vines
Studebaker-Packard V8 Limited
Obsolete Engineering

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