[Fot] TR3 headers

[yellow04]

Thanks Dean, the Cambridge headers are installed on Old Blue! 

The Cambridge headers are not the same as Ken Gillanders supplied to so
many of us over the years, but I have no doubt the same manufacturer was
responsible for making both. The primaries on Ken's header were
significantly shorter, the collector was on the straight section of pipe
under the starter. I have not had Old Blue on track yet with the
Cambridge header, but I made so many other changes this rebuild that I
am afraid I will not really be able to say what kind of difference they
make. 

Gillanders believed headers with the 1 5/8's inch primaries were the way
to go, he had all the fast TR3/4 racers in the east running them. The
vast majority of TR3/4 headers we see, and as Bob Kramer states, we all
have hanging on our walls, have smaller primary tubes, usually 1 1/2
inch. 

It seems every year or so a racer is looking for a header for a TR3/4,
and as there doesn't appear to be an obvious supplier, it turns into a
scramble. 

Do we know if somebody selling TR3/4 headers with the larger primary
tubes? 

We know a lot of work has been done comparing the length of the primary
tubes, but has anyone done any dyno work comparing headers with
different primary tube diameters??? 

Henry Frye
2025 Kastner Cup Chair
fot at kastnercup.com

On 2024-11-27 13:23, Dean Tetterton via Fot wrote:

> These are the headers I ran on my TR3A, TR4, and Warwick GT. 
> They came from Cambridge Motor Sports in the UK when they were 
> in business. I think they were the same as what Ken sold at BFE.  
> 
> One of these sets went to Henry Frye. Watch out, they might be 
> on Ole Blue at the Kcup.  
> 
> Dean T. 
> Need a Set? Buy my TR4, get the header. 
> 
> On Wed, Nov 27, 2024 at 12:07 PM Greg Blake via Fot <fot at autox.team.net> wrote: 
> I'm probably bucking the trends here. I run the stainless falcon tri-y. If you believe theory behind header designs, the shorter primaries will favor low to mid range torque over high rpm horsepower. Since I built my race motor around the concept of accentuating torque, I went with these. Been running them since 2010 and they are still in great condition. Do I make the most power, no. Does my car pull out of the corners? Hell yeah.  
> 
> One draw back with my engine combo. It drops out of that nice fat torque curve at anything over 6500. I know some other guys that run TR 3/4 motors that will pull another 1000 rpm making power.  
> 
> I guess it comes down to the whole package. Match your headers to your engine.  
> 
> Sent from my iPhone 
> 
> On Nov 27, 2024, at 10:32, Joe via Fot <fot at autox.team.net> wrote:
> 
> I'm using stainless steel headers that I got from BFE probably 20 or so years ago.  They have been great.   
> 
> Have an old set of tri-Y headers hanging around that I last used when the 4:1 steel headers that came with my TR3 fell apart and I was waiting for the BFE headers to arrive.   
> JoeB 
> 
> Sent from my iPhone 
> 
> On Nov 26, 2024, at 9:04 PM, Michael Deweerd via Fot <fot at autox.team.net> wrote:
> 
> Amici 
> I'm searching for a set of headers for my new TR3 project car  I would really like the stahl header but they have retired and ACP doesn't list any triumph headers.  
> What are my options? What are you guys running ?? 
> 
> -- 
> 
> _Mike Deweerd_ _______________________________________________
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