[Fot] milling TR4 head for pop-ups

Sat Jan 11 13:35:48 MST 2025

WOW! 
Nice looking setup. 
Sent from my iPhone

> On Jan 11, 2025, at 13:48, JIm Gray via Fot <fot at autox.team.net> wrote:
> 
> 
> Yep, I did exactly that plus deshrouded the valves. I took off just enough to remove the shrouds at the valves and went with Wiseco pop ups made to order through BF&E. Also welded in and reshaped the exhaust valve pockets and part of the ports. It spent a lot of time on the flow bench.
> The head I built before this one eventually cracked due to being milled to thin so I went the other way to get compression.
> jg
>  
> From: Fot <fot-bounces at autox.team.net> On Behalf Of Bob Kramer via Fot
> Sent: Saturday, January 11, 2025 8:33 AM
> To: Fot <fot at autox.team.net>
> Subject: [Fot] milling TR4 head for pop-ups
>  
> I am finally rebuilding the engine I got with the #67 TR4 many years ago. The car came to me with dual SK sidedrafts (Weber rip-offs) and the head had some interesting stuff done to it.The intake area on the head was carved out to raise the angle of the SK's and the combustion chambers were recessed with a flat mill to fit pop up pistons to gain compression without much head milling. I know others run pop-up pistons. Has anyone else done this?
>  
> Bob Kramer
> <Head1.jpg>
> <Head 2.jpg>
> <cc2.jpg>
> <C chamber.jpg>
> <DSCN1566.jpg>
> <IMG_2072.JPG>
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