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OK, theorhetical question that's been bugging me - I'll take you through the stages of my warped thinking: 1/ Marinas are available with an 1800 B series lump which came with either standard or low compression (I think?) 2/ This 1800 B series lump will fit an A60 gearbox using a 1622 back plate, once you've filed out a little bit of metal from the back plate. 3 / A series distributors will fit B-series engines 4/ 1275 A series engines are fitted with the same basic type of SU carb as single carb 1800 B-series engines 5/ Turbo engines need to be fairly low compression, or they go pop SO... Take an A60, remove engine and box. Take low compression 1800 marina engine, file out 1622 backplate & fit, bolt to A60 gearbox. Change marina engine mounts for A60 ones. Replace spark system / wiring with turbo A-series dizzy & gubbins. Take 1275 carb & turbo gubbins, change needle in carb for 1800 one, perform manifold related hocus-pocus, say magic word & bodge onto aforementioned low compression B-series engine, fit to A60, fabricate side-exit exhaust with minimal silencing... Voila! Fully finned and chromed 60's barge disappears sideways over the horizon in clouds of tyre smoke and tubo whistle... OK Now, somebody please explain all of the (inevitable!) floors in this idea?  |
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Last Edit: Apr 1, 2008 18:31:25 GMT by wilko
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y282
Part of things
Posts: 122
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if you can find an a60 with floors in it, good luck to you  this concludes my exercise in pedantry. |
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24v cosworth capri, M3 evo coupe , cbr900rrn, cb750f2n
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de-dum...ching! :-)
I did mean "flaws" honest! Not content with posting in the wrong section, I have to be shown that my SPAG is slipping like a worn out clutch - you'd never think I had a A grade English A-level would you!!!!
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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That sounds like a plan! Don't see any problems with that only thing is you would have to get the needle profiled for the boost etc I would think but if you get it rolling roaded then they would proberly sort that then.
I have a 1293cc mini turbo as a daily driver it has a straight through exhaust and its actually very quiet, until I give it some beans then I think it sounds like a jet fighter.
You should definatly do it to an A60 though that would be a great sleeper!
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starionturbo
Part of things
Is planning mental turbo action MU HUH HUH!!!
Posts: 528
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So mental it'd be a crime not to do it!! ;D
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Thank you for that profound insight Slater!  I don't know much about turbos other than the obvious stuff about boost pressure, detonation etc... but a NA low comp engine would be a better starting point for a turbo conversion than a standard NA lump, surely...  Cheers for the encouragement matt! I have a complete 1800 single carb Marina engine, an additional spare inlet manifold & downpipe, a spare (complete) 1622 engine & box already in my keeping - I guess what makes it an attractive concept is that I could make significant inroads into the idea in terms of building the drivetrain without having to take the car off the road, which would be nice - I've EVEN got numerous spare A60 panels and a rough A60 shell I could test-fit the drivetrain to... The more I think about buying a roadworthy A60 to play with, the more it makes sense... |
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Just a thought, early Sherpa vans come with a low-comp B-series, and that might just bolt to an A60 box a bit easier.
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1953 Minor (Long term project)
PT Cruiser
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DutyFreeSaviour
Europe
Back For More heartbreak and disappointment.....
Posts: 2,944
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Standard pressurising of the carb issues to watch out for - unless I missed the 'nick a turbo carb' part up there somewhere - sorry if I did. It's been discussed about other SU engines too - I have twin HS6's on the Trump and was thinking along the same lines - but standard carbs float bowl ( I think ) collapse under turbo pressure being fed into the chamber..... it's early, I haven't had my coffee yet and I'm going on what I've read - so may have mixed up which part collapses....  I'm awaiting back order of PPC - they did this to the SU's on their roller apparently...... worth a read! Public thanks to Slater - for sending me the copes I'd missed - greatly appreciated matey. |
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Back from the dead..... kind of
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A mate of mine put an 1800 B series into a Mini estate. The problems he had was the subframe and inner wings ie. they got in the way Plenty of chopping and welding required. He had to make a small modification to the bonnet to allow clearance of the cam pulley. Not entirely sure how much room you have in an A60 but whats the worst that could happen?? You could use a Renault 5 turbo carb.
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You could use a Renault 5 turbo carb. Am I right in thinking the reno turbo "blows through the carb", so to speak? Standard pressurising of the carb issues to watch out for - unless I missed the 'nick a turbo carb' part up there somewhere - sorry if I did. I said "nick the A-series turbo carb and put the 1800 jet in"... ;D |
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DutyFreeSaviour
Europe
Back For More heartbreak and disappointment.....
Posts: 2,944
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yup - my bad, did say I was pre-coffee! |
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Back from the dead..... kind of
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Just a thought, early Sherpa vans come with a low-comp B-series, and that might just bolt to an A60 box a bit easier. Yeah I believe they do & have a different box again to the Marina or MGB - but I think you have to "do" the back plate thing either way to get it onto a 1622 box - apparently it's just a matter of bolting the 1622 & 1800 back plates together and filing a bit off the 1622 one - but I'm sure Seth, Les509 or PID363 would know... Got some boring financials to take care of for the next month or so but then should have the funds to start hunting down some sort of tax free secondary form of transport... if an A60 shows up, then it could well be game on.... |
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In the early days people used to fill the floats with foam to prevent it from colapsing.IIRC Broadspeed Capri turbos used a carb encased in a box,which i think was done to prevent this.But i'm not sure how as the carb was still under presure  .Maximum boost by corky bell is a good bedtime read.What turbo are you using?I just picked up a turbo of a Rover 620 turbo which looks a good size for my turbo A series Project.By the way you will also need a rising rate fuel regulator from the metro turbo.Also the metro dizzy will have a different advance curve for whats needed on your 1800 but could be a good starting point. |
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.Maximum boost by corky bell is a good bedtime read.What turbo are you using?I just picked up a turbo of a Rover 620 turbo which looks a good size for my turbo A series Project.By the way you will also need a rising rate fuel regulator from the metro turbo.Also the metro dizzy will have a different advance curve for whats needed on your 1800 but could be a good starting point.