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Thread: Pinto turbo bottom end build

  1. #41
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    Re: Pinto turbo bottom end build

    Managed to cc the head today using the perspex method and pretty confident the chambers are bang on 50cc. Will need to get the block back with the pistons to measure the piston height from the deck and the cc of the piston bowl. Plug in the numbers to an online calc and see what i need to be. I will try different combustion chamber cc’s till i get the desired comp ratio, fill the chamber up with the cc of fluid and measure from the surface to the fluid and that should give me what needs to be skimmed.
    How accurate i can do all that will be a bit of a hit or miss lol but sounds gd in theory?

  2. #42
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    Re: Pinto turbo bottom end build

    Car is back up and running. The calculations i have done after skimming 1mm off the head seem to have me at about 8.3:1

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  4. #43
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    Re: Pinto turbo bottom end build

    Got my setup all up and running, Ended up taking 40 thou off the head and recon iím running about 8.3:1 comp. Got a set of ev14 550cc injectors which have made the car so much better and easier to tune than the old ev1ís!
    Only problem now is what clutch do I fit for the power but still drivable for road use? I have an LUK heavy duty at the moment and its slipping in the higher gears on boost.

    Cheers
    Greg

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  6. #44
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    Re: Pinto turbo bottom end build

    I have a paddle clutch in mine, works nicely and pretty friendly on the road, though not sure if the car being so light helps.

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    Re: Pinto turbo bottom end build

    I think you can search a bit in my old posts about my experiences and thoughts of Pinto turbo clutches.

    I have choosen to use a YB 240 mm size, that means there are some other options available. Currently I'm on a Sachs 695 clutch cover and an AP organic disc. I have used a 6 paddle sprung plate earlier but prefer the organic one, lot's easier to drive.

    But going to 240 mm means other changes (bellhousing, gearbox, starter) too. I ran out of working, driveable 215 mm options though.

    Gustaf

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    Re: Pinto turbo bottom end build

    Mine in a sierra so a tad heavier lol. What paddle clutch do you run tho?

    Gustaf, do i really need to be changing to a yb clutch? From my searches i can see that yb flywheel wont fit my pinto crank. I’m running an mt75 box on my pinto, would this work with a bigger flywheel? Can the pinto wheel be drilled to suit yb clutch or is it too small?

    Thanks guys!

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    Re: Pinto turbo bottom end build

    Thats a good question. It was an ex display item from a company that had shut down, so details were sketchy, but it was cheap so.... If memory serves, it was a borg & beck item, but I was never able to find the details of a borg & beck paddle clutch for a pinto, so who knows?

  10. #48
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    Re: Pinto turbo bottom end build

    Quote Originally Posted by Turbo_crossflow View Post
    Can the pinto wheel be drilled to suit yb clutch or is it too small?

    Thanks guys!
    I have heard it mentioned you need a transit flywheel which is big enough and is the same crank bolt pattern to the pinto crank. Maybe a load of rubbish as well though.

  11. #49
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    Re: Pinto turbo bottom end build

    Quote Originally Posted by wildo105e View Post
    I have heard it mentioned you need a transit flywheel which is big enough and is the same crank bolt pattern to the pinto crank. Maybe a load of rubbish as well though.
    Correct Transit pinto flywheel is same bolt pattern as normal pinto, but bigger dia

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    Re: Pinto turbo bottom end build

    Ah yes brilliant i see the transit pinto uses a 240mm clutch, next problem is will it fit my mt75 bellhousing

    Did some cossies not use the mt75 box?

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    Re: Pinto turbo bottom end build

    Ah yes brilliant i see the transit pinto uses a 240mm clutch, next problem is will it fit my mt75 bellhousing

    Did some cossies not use the mt75 box?

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    Re: Pinto turbo bottom end build

    i dont know for sure about then and now. But i had run such a cam ( crossdrilled as you say ) back in the days, it was an oval hotrod profile and it worked very good that way. Why shouldnt it be practised nowadays?
    Last edited by gid; 10-09-2019 at 20:29.

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    Re: Pinto turbo bottom end build

    Sorry dont know why that double posted, it seems i need to either machine down the transit flywheel to fit the smaller ring gear of buy a 4x4 mt75 box and swap the back end of the box with my 2wd part. I think the machining option sounds best lol

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    Re: Pinto turbo bottom end build

    if machine the flywheel down to take a smaller ring gear, wont that defeat the purpose of the larger flywheel?

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    Re: Pinto turbo bottom end build

    I dont know the size difference yet but obv as you say, if it needs to be turned down smaller than the diameter of the 240 clutch then yep thats no use lol

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    Re: Pinto turbo bottom end build

    Quote Originally Posted by theduck View Post
    if machine the flywheel down to take a smaller ring gear, wont that defeat the purpose of the larger flywheel?
    Depends on how much it has to be machined down really. The main objective is to be able to mount a larger diameter clutch on it, so as long as it's not machined down past the clutch mounting holes it shouldn't be a problem.

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    Re: Pinto turbo bottom end build

    Quote Originally Posted by Turbo_crossflow View Post
    I dont know the size difference yet but obv as you say, if it needs to be turned down smaller than the diameter of the 240 clutch then yep thats no use lol

    Just realised I hadn't seen this when I replied.

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    Re: Pinto turbo bottom end build

    Think your right duck and rallyrob, done some measuring and looks like my only options are either t5 box or mt75 4x4 box and build a hybrid using my 2wd box. Another thing that has me puzzled tho, how do these bigger bellhousing boxes still fit to a 205 block cossie if a 205 pinto is basically the same thing or are the lugs wider perhaps?

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    Re: Pinto turbo bottom end build

    The T5 and Type 9 bellhousings are just a slightly different shape around the block/bellhousing mountings holes allowing for the bigger or smaller diameter flywheels.

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    Re: Pinto turbo bottom end build

    Quote Originally Posted by rallyrob View Post
    The T5 and Type 9 bellhousings are just a slightly different shape around the block/bellhousing mountings holes allowing for the bigger or smaller diameter flywheels.
    Yep the bolt holes for a rs2000 bellhousing bolt on the outside as it is a lot smaller. T5 sort of bolts on the inside if that makes sense. T5 is massive compared to the rs one.

    I have a pinto, cosworth and transit flywheel and can measure them if you need at the weekend.

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    Re: Pinto turbo bottom end build

    Quote Originally Posted by rallyrob View Post
    The T5 and Type 9 bellhousings are just a slightly different shape around the block/bellhousing mountings holes allowing for the bigger or smaller diameter flywheels.
    Yep the bolt holes for a rs2000 bellhousing bolt on the outside as it is a lot smaller. T5 sort of bolts on the inside if that makes sense. T5 is massive compared to the rs one.

    I have a pinto, cosworth and transit flywheel and can measure them if you need at the weekend.

  24. #62
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    Re: Pinto turbo bottom end build

    Thanks Dave, i think from what i have gathered, the transit o/d is 335mm. Would be interesting to see also if the cosworth flywheel holes for the clutch cover use the same hole pattern. If its unique to the transit flywheel this would mean i’m restricted to transit cover plates.

    If you could check what the transit flywheel would look like shaved down to the std pinto ring gear size in relation to the cover plate holes too that would prob be the decider

    Cheers Greg

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    Re: Pinto turbo bottom end build

    Thanks Dave, i think from what i have gathered, the transit o/d is 335mm. Would be interesting to see also if the cosworth flywheel holes for the clutch cover use the same hole pattern. If its unique to the transit flywheel this would mean iím restricted to transit cover plates.

    If you could check what the transit flywheel would look like shaved down to the std pinto ring gear size in relation to the cover plate holes too that would prob be the decider

    Cheers Greg

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    Re: Pinto turbo bottom end build

    I will try and get some pics of them. I was told it was a transit flywheel when i was sold it by mistake as a pinto flywheel.

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    Re: Pinto turbo bottom end build

    I have friends who have used the DOHC "small" MT-75 on YB's, and they report of minor grinding and modifications to the starter mounting.

    On the other hand, the 2.3 16v (and possibly 2.0 16v too) frog-eye Scorpio has an MT-75 and a 240 mm clutch, that should be a direct fit. Hydraulic throwout bearing too, nice! I have one as a backup for my T5.

    As for flywheel, I had TTV make me a steel YB flywheel with a Pinto bolt patter. It is now 10 years ago but it was way cheaper than I feared.

    Gustaf

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    Re: Pinto turbo bottom end build

    Clint from bhp says this https://shopbhp.com/collections/heli...-rally-version should do the job on the standard pinto flywheel. May save a bit of bodging and butchering :-/

  29. #67
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    Re: Pinto turbo bottom end build

    Did you find a Cosworth oil pump and pickup with spray bar?
    I found one in my pile of bits.
    What I did on my Pinto build was to take the Cosworth pump top off and put it on a high pressure oil pump, then grafted the oil spray bit to an RS2000 pickup to match my sump.

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    Re: Pinto turbo bottom end build

    I can't find a torque rating for the Helix clutch kit, that's nice to have in order to say if it's likely to work or not.

    Anything less than a 300-350 Nm torque specification is marginal on a Pinto turbo IME. At least long term.

    Gustaf

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    Re: Pinto turbo bottom end build

    Snapper, yes i got a spray bar setup sorted, just used new standard pinto oil pump with cosworth top cover, wasnt sure if high pressure would blow my turbo seals.

    Still haven't done anything about the clutch yet. Insurance has ran out on the car now so prob just keep it off the road for the winter and give the spending a rest for a bit lol.

    Diff will need rebuilt also as its a bit noisy on light load and also the lsd system needs repacked. Dont know what to do for management side of things either as finding someone in Scotland or anywhere at all that can do megasquirt seems a bit tricky. Should prob invest in a decent management system now that Ive spent a few bob on this rebuild. Theres also the camshaft too, still running standard efi and not sure if a turbo profile would be better b4 amy mapping gets done? Things going like stink at 1.2bar at the moment but needs setup proper.

    Anyway back to saving again lol

    Thanks for all the help on here guys!

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