Triumph Sports Cars

Nearly done fixing a RV8 conversion to a Stag.
The customer wanted, among many other things. The stock hood to close without a scoop or bubble.
The original conversion utilized a huge cowl induction scoop that was just hideous.
It had the ubiquitous Edelbrock manifold and Holley 390 carb.
To get enough clearance we used a stock Skylark intake manifold with 1/2'' milled from the carb mount.
Could not use the Holley carb as the inlet jet adjusters were in the way.
Mounted a Carter comp series 750 carb (which is waaaaay too big) but it's what we had in stock that day.
Had to mill the vent housing and the inlet jet bumps off and weld the openings closed.
Then used the customers Holley air cleaner with the riser flange milled off flat.
A few hours tuning the carb passed the emissions test. And a little more work and it runs really well.

I don't recommend that big a carb at all.
But, tuned right it does run well.
Good enough that we're now checking into a clutch that won't hold on anymore.

Hope that helps someone along the way.

Cheers
Fred

There are a lot of cars could do with your ingenuity.

Ivor

Cool!

However, I don't recall hearing that other Stag-Rover conversions required so much effort at intake manifold or carb height. I'm wondering whether the engine could have been dropped a little lower in the chassis without too much complication.

We dropped the X member 3/4" as well as the swaybar.
And made new motor mounts.
The engine timing cover is 1/4" above the swaybar. And the headers nearly rest on the frame rails.
I think some of the problem is that the original swap retained the triumph trans.
The adapter is 2'' thick which puts the engine quite far forward.
The other swaps that I have seen set the engine back a little further.
The only other one that I'm familiar with doesn't run an air cleaner at all.

Ahhh yes, I sold one of those adaptors a couple of years ago. Hadn't thought about the effect on engine position.

Ivor

Can the car idle while stopped without needing extra help/gas ? That seem's to be the ongoing issue.
Not enough air. I don't like the hoods with the scoops, it destroys the sexy look of the car. But, having the car cut out at every other stop is a pain. Just wondering how this one does?

The car runs well Keith.
No overheating, no issues with a hot idle.
It was 34'C or 93'F here all last week and the car ran fine, even in heavy traffic.
A lot of that has to do with the carb setup. I run the float levels a little lower than normal in something that gets heat soaked like this one. Isolating the carb from the manifold works wonders as well. A 1/8 inch silicone base gasket and 4 nylon tophat bushings to isolate the mounting studs do an amazing job.