The Triumph Dolomite Club - Discussion Forum

It won't even have time for a little sniff to let you know he doesn't like it.

Jeroen

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Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com

I quite like the idea but I suspect the gearbox and axle won't. Superchargers are also quite big so you'd need to think about how to drive it and where to place it. They do take a degree of power to drive too so your actual gain won't be that high. For example if I added one to my MX5 I'd add perhaps 40-50 bhp before you start really stressing the engine

If I wanted to improve performance in an 1850 I'd fit a TR7 2 litre engine, a nice build with some forged pistons and a slightly warmer cam, nicely ported head and then go for EFi. I'd imagine you could make a reliable 125bhp+ quite easily which isn't bad.

Questions would still be asked of the gearbox and axle's ability to cope though.

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Mark

1961 Chevrolet Corvair Greenbrier Sportswagon
1980 Dolomite Sprint project using brand new shell
2009 Mazda MX5 2.0 Sport
2018 Infiniti Q30

Uprated brakes ; swap the 1850 box for a Sprint item. Also the diff. The 1850 items are a bit weak.
Moss do a supercharger kit for the MGB which will give you some pointers , but the kit is expensive.
See what the insurance people say as well.
It would be an interesting technical mod though.
Tony.

Jeroen

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Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com

if you do have 120 bhp already you are at the limits of the standard box and diff.

Quick enough as is...

Jonners

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Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.

Can you supercharge the standard carbs? As far as I understood it the SU relied on the difference between the external air pressure and the inlet vacuum to work. if your supercharge the inlet, won't it be above atmospheric pressure and therefore the suction chamber will no longer be lifted?

I remember reading that that had to modify the carb on the Metro Turbo to get around this problem.

It is possible to supercharge or turbocharge through SUs. But you have to equally pressurize the float chamber overflows as well, or it blows all the fuel out through them. Though I'm not sure how you deal with any real overflow if there is a problem with the float or float valve .

Graham

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The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).