Have a look at his latest video
I always wanted one of these when I was younger!
I always wanted one of these when I was younger!
Tyrrells classsic
- Thread starter DoubleChevron
- Start date
that blow through setup iwth the remote carby is just bizarre!
Mercedes used something similar in the 20‘s - supercharger activated only at full throttle and blowing through the carbs.
It worked well, only complexity was need to pressurise the float chamber so carby could work as planned
ANdrew
oh sorry .... i meant draw through, not blow through. the turbo is between the carby and intake manifold
IIRC when the driver depressed the accelerator fully on those early MBs the linkages engaged the blower clutch, closed a diverter valve in the carburettors' inlet pipe, opened extra jets in the carbies, engaged an extra valve on the fuel pump and retarded the ignition timing.
The primary fuel supply from the tank was normally by Autovac, but the blown cars also had an extra gravity fuel tank under the bonnet. Another valve was opened to allow boost pressure into the gravity tank. The float chamber was already pressurised by the boost pressure, so pressuring the gravity tank was sort of like an early "rising rate" setup.
The linkages were very complex and quite prone to going out of adjustment, and word at the time was the system was more likely to be not working, than working..
The 1920's Stutz's had a similar system, but operated by a lever on the dashboard, again IIRC the Stutz overcame the boost pressure in the float chamber by having a camshaft driven high pressure fuel pump that was engaged by the blower's linkage system.
The due to its higher boost pressure the MB system was only good for about 30 seconds of continuous use before the engine blew up, The Stutz's could be left engaged for extended periods.
Villiers did a blow through set up for a 1926 Rolls Royce Phantom 1 which was a little "different".
The Rootes blower was driven by a separate 900cc OHC 4 cylinder engine that the driver started up when he wanted some extra go.
A period magazine that observed the vehicle in testing at Brooklands said, "the vehicle seemed to be making more noise than power".
Yes there's an awful lot of plumbing for what is just a basic draw through turbo setup. At least they could have sourced the air cleaner's cool air from the RH side instead of running that pipe all the way across the the width of the engine bay to the LH side.
Even the pipes to and from the turbo are bloody long. One could be forgiven for thinking it might be a little bit laggy.
I do like the alloy wheels it has on it.
Thought you might like Wray supercharger page:IIRC when the driver depressed the accelerator fully on those early MBs the linkages engaged the blower clutch, closed a diverter valve in the carburettors' inlet pipe, opened extra jets in the carbies, engaged an extra valve on the fuel pump and retarded the ignition timing.
The primary fuel supply from the tank was normally by Autovac, but the blown cars also had an extra gravity fuel tank under the bonnet. Another valve was opened to allow boost pressure into the gravity tank. The float chamber was already pressurised by the boost pressure, so pressuring the gravity tank was sort of like an early "rising rate" setup.
The linkages were very complex and quite prone to going out of adjustment, and word at the time was the system was more likely to be not working, than working..
The 1920's Stutz's had a similar system, but operated by a lever on the dashboard, again IIRC the Stutz overcame the boost pressure in the float chamber by having a camshaft driven high pressure fuel pump that was engaged by the blower's linkage system.
The due to its higher boost pressure the MB system was only good for about 30 seconds of continuous use before the engine blew up, The Stutz's could be left engaged for extended periods.
Villiers did a blow through set up for a 1926 Rolls Royce Phantom 1 which was a little "different".
The Rootes blower was driven by a separate 900cc OHC 4 cylinder engine that the driver started up when he wanted some extra go.
A period magazine that observed the vehicle in testing at Brooklands said, "the vehicle seemed to be making more noise than power".
Log in to Facebook
Log in to Facebook to start sharing and connecting with your friends, family and people you know.
www.facebook.com