Metal elbow noodle brazed in. These are the one of the early sets of triples used on the #33 BSR 240 and you can see where they tapered bored them out to 50mm.

The direct stream of 114 octane means after you lift and then get on the throttle a nice flame comes out the twin exhaust trumpets.

Looks like they removed part of the throttle shaft between the two screws that secure it to the throttle plate, less restriction there too.  

 

How's the idle with all of this done?  Not that it matters on a race car anyway...

It idles quite nicely, big cam, twin trumpets, a rich rumble.

There are two issues. It doesn't generate enough vacuum, so the first fix was an electric vac pump for a year and then last winter Wilwood pedals with MCs which cured that issue and two, idling or just driving back in to the garage from the track will leave a nice deposit on the plugs and top of the pistons.

After a run at WOT here's the color of the exhaust...

On ‎2‎/‎22‎/‎2018 at 8:36 PM, gnosez said:

It idles quite nicely, big cam, twin trumpets, a rich rumble.

There are two issues. It doesn't generate enough vacuum, so the first fix was an electric vac pump for a year and then last winter Wilwood pedals with MCs which cured that issue and two, idling or just driving back in to the garage from the track will leave a nice deposit on the plugs and top of the pistons.

After a run at WOT here's the color of the exhaust...

That's about how mine looks after a highway drive on my Z with Mikuni's.

On my Z with SU's, I can't get that color on the exhaust.

Try a half and half mix of say 93 and 110 and then see if your SUs produce the same gray color.

Try a half and half mix of say 93 and 110 and then see if your SUs produce the same gray color.

I'll do that. Thanks!

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