Valve guides.............Cast or bronze!!

General Chat with an emphasis on BMC Minis & Other iconic cars of the 1960's. Includes information on MK1 Action days.
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360gts
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Joined: Sat May 24, 2014 7:12 am

Valve guides.............Cast or bronze!!

Post by 360gts »

Refurbishing one my Longman heads....guides need replacing.
What are the track guys using in the UK....Bronze or cast?

The head came with bronze.
251 ENG
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Joined: Sun Jun 27, 2010 5:26 pm

Re: Valve guides.............Cast or bronze!!

Post by 251 ENG »

We use swiftune guides in everything where possible

The only ones that always have the hole in the centre !!
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Vegard
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Re: Valve guides.............Cast or bronze!!

Post by Vegard »

I've just loads of AE iron guides, but on anything that's going to sustain high revs over time, always bronze ones. I've used KAD ones, Swifty ones, Minispares ones, never really saw what Simon is mentioning.
251 ENG
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Joined: Sun Jun 27, 2010 5:26 pm

Re: Valve guides.............Cast or bronze!!

Post by 251 ENG »

Check some for concentricy

I have had iron one , 0.015” out and cheaper bronze ones not much better . If you just fitting guides, cutting seats and it out the door no problem but on a head with nice seats it a mega issue
Have had some cases where a head with Swiftune guides has been overheated , replaced guide with another Swiftune guide and valve lapped straight in with no cutting.
Try that with most of cheaper guides .
Got to admit that we have not used MED or KAD to be fair
251 ENG
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Joined: Sun Jun 27, 2010 5:26 pm

Re: Valve guides.............Cast or bronze!!

Post by 251 ENG »

If its a head that has to use iron guides will buy a load and measure them in V block with clock both ends and pick the best .
The worst get made in to turbo exhausts
360gts
Posts: 2111
Joined: Sat May 24, 2014 7:12 am

Re: Valve guides.............Cast or bronze!!

Post by 360gts »

Found some bronze guides that I had stashed away from my racing days. Going to use them.
Sounds like everything we buy now is less than the quality we had many years ago.
So much for advances in technology/production improvements!!!!!
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