2.20 intake valve in a 60/40 Brodix -12 ?

levisnteeshirt · Post by **levisnteeshirt** » Sat Sep 25, 2021 9:24 pm

Anyone ever do it ? The wider valve spacing doesn't count

Walter R. Malik · Post by **Walter R. Malik** » Mon Sep 27, 2021 12:07 pm

levisnteeshirt wrote: ↑Sat Sep 25, 2021 9:24 pm Anyone ever do it ? The wider valve spacing doesn't count

The exhaust valve needs to be a bit smaller but, it certainly can be done.

mag2555 · Post by **mag2555** » Mon Sep 27, 2021 5:17 pm

According to my Brodix catalog the 2.20”/1.60” is a option on a 70/125 valve centerline for the - 12 heads.
The intake port goes from 287 CCs to 305 with that change.

You will need a rocker shaft system with that move also due to the needed .180” offset lifters I guess!

levisnteeshirt · Post by **levisnteeshirt** » Wed Oct 13, 2021 10:25 pm

been watching some Eric Weingartner videos ,, he puts a 1.56 exhaust valve in some of his heads ,,, i dunno ,,, I made this post and wanted to see if anyone came back with a response ,, they have 2.150's in em now ,

i probably need to get newer heads ,, these have the raised runner and not the hump in the floor ,, been hearing these are more desirable , Brodix went back to offering a RI -12

If I can get them in the 750-775 range on a 434 I think they'll do fine ,, from what I read a sprint 406 on alcohol MFI has been doing 800 with these for quite some time

i might order a 2.20 valve and see what things look like

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2.20 intake valve in a 60/40 Brodix -12 ?

2.20 intake valve in a 60/40 Brodix -12 ?

Re: 2.20 intake valve in a 60/40 Brodix -12 ?

Re: 2.20 intake valve in a 60/40 Brodix -12 ?

Re: 2.20 intake valve in a 60/40 Brodix -12 ?