mr
Posted a lot
Posts: 1,529
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who knows about metro turbos or Renault 5 gt turbos then  ? I'm toying with turboing our spitfire engine but after a quick looky,it appears the turbos on those cars are blow thru and run into su carbs. is this true and if so,has anyone else used those kits but modified on other cars? I run a suck thru system on my old girl but don't know about factory built stuff. i grabbed a rebuilt 13/60 head a few weeks back and kinda fancy building up on that and then just dropping it onto the engine that's in the car. found a 13/60 single inlet manifold and assume that'll fit where our twin carb inlet currently sits and i'll sell off the unused stuff to pay towards the build. i'll take any info anyone may have and pics with info is also welcomed
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Got the car from 105 bhp at the crank to 152 at the wheels.nitrous going on next.....if it ain't broke,keep bolting on go faster parts until it is........ www.fordgranadaclubuk.freefo.de |
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sowen
Club Retro Rides Member
Posts: 2,245
Club RR Member Number: 24
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information overload requiredsowen
@sowen
Club Retro Rides Member 24
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I was running twin SU's in blow through on my P6 a few years back, dead easy to do and worked really well. I used standard HIF44 carb's as I couldn't find genuine turbo spec SU's (they have extra seals fitted) and rebuilt them with a Metro turbo seal kit, floats, needles, springs etc. I had them running upto 10psi before they started to ooze oily deposits out of the dashpot bases where the seals are on the genuine turbo spec carbs. The biggest thing was building a plenum chamber to make the carbs work under pressure. At the time everyone was telling me I had to fit a restrictor plate across the front of the carb, but that's rubbish. I built a plenum chamber with two aftermarket trumpets and the air fed into the side of the box. I fitted a pitot tube in the centre of the plenum intake and used that as the boost reference for the fuel pressure regulator and float chamber breathers.  If you're running a single SU then try finding a genuine plenum for one as it'll be much easier than having to make your own. Fuel was a simple efi high pressure pump from the tank with a Metro turbo Malpassi fuel pressure regulator. It gives a rising rate fuel pressure suitable for the SU's working under boost keeping it about 3-4psi above boost pressure so the fuel doesn't get blown back out. |
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