User Tag List

+ Reply to Thread
Results 1 to 13 of 13

Thread: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

  1. #1
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,110
    Thanks
    3
    Thanked 83 Times in 81 Posts

    Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    After some driving and adjusting this summer I finally got the Capri on the dyno at Sävar Motor again.

    Short spec:205 Pinto block
    DP Pistons in 91,5 mm bore, 38 mm flat tops
    Maxspeedingrods steel rods, 129,5 mm
    (should give me around 8.55:1 CR)
    RWD YB oil pump and spray bar
    YB sump with wings, and trap doors
    Pinto crank
    TTV steel flywheel to take 240 mm YB clutch




    Head is a carb with slight port job
    Paul Ivey/REC valves (REC 882 inlets 1.800”/45.7mm, REC 297 exhaust1.500”/38.0mm)
    Kent FR34 camshaft (the kit with supplied springs etc. from Kent Cams)


    "Swedish plenum" intake, YB trumpets fixed to Pinto flange
    Pulse split exhaust manifold

    Mitsubishi TD04-19T turbo, internal wastegate (modified Holset actuator)

    Megasquirt MS3 with MS3X board.

    This is the engine build detailed here: http://www.turbosport.co.uk/showthread.php?t=1142387

    While the engine had been reasonably responsive during the summer, at around 1,4 bar, it was evident some real dyno tuning was needed.

    We started off at spring pressure (no boost control activated) and that leveled out at close to 1.1 bar. At around 6500 rpm the power was still climbing but just over 7000 we heard a clatter in the knock sensing equipment. We figured it might be valve float or possibly the rather aggressive ramps that made the sound. Another 500 rpm would have been nice but not this time.

    The baseline ended up at 245 whp (6900 rpm) and 273 Nm (5800 rpm), not a bad number and quite perfect for registration purposes.

    After that, we enabled the boost control and started to dial in more boost for track use. This is my first try with a real boost control system, and that was quite interesting. At around 1.5-1.6 bar the turbo stopped flowing more in the higher rev range so we decided to ramp down the boost towards 7000, and instead kick it up a bit until 4500-5000.

    This gave a max power of 279 whp (5800 rpm) and 416 Nm (4400 rpm).

    Now for the interesting part, comparing to the old engine specification (lower compression ratio, smaller head/valve/cam, bigger Holset HX35 turbo).

    When we tuned that in 2015 the top results were 284 whp (5900 rpm) and 398 Nm (4400 rpm), at 1.8 bar. At 1.1 bar that engine gave 226 whp (5900 rpm) and 325 Nm (4500 rpm).

    Dyno graphs:







    I do think I now have an engine with a broader power band. Still yet to try driving it though (unloaded off the trailer att 11.30 pm last night).

    Gustaf

  2. #2
    Bodger

    Join Date
    Oct 2013
    Location
    LTU
    Posts
    63
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Does this compressor map represents your turbo? It suggest that this turbo is capable of 300bhp (very approximately) and you got this result which means that everything is OK, good job, congratulations.

    By the way, your budget conrods seems to be OK, did you use bolts supplied together with them?

    Click image for larger version Name:	td04h-19t-cfm.gif Views:	357 Size:	26.6 KB ID:	81604

  3. #3
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,110
    Thanks
    3
    Thanked 83 Times in 81 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Yes, that should be the turbo. It is pretty much maxed out, that's for sure.

    I would like to refresh my memory on how you can estimate the air flow in the engine, I am a bit weary about the risk for surge in this case. We also run it above the map briefly (pressure ratio above 3.0). It might well be that we are asking a bit too much of it but it does run rather sweet now.

    Yes, using the supplied bolts. Too little mileage to really say much but in relation to other builds I don't feel we stress the rods very hard.

    Regards

    Gustaf

  4. #4
    Bodger

    Join Date
    Oct 2013
    Location
    LTU
    Posts
    63
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    By the way, what IC are you using? 2 bar of boost should kick the intake temps up, what have you had while dynoing ?

  5. #5
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,110
    Thanks
    3
    Thanked 83 Times in 81 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    It's a rather large KL Racing intercooler.

    I don't have the logs here but I don't think we exceeded 40 degrees C in intake temps. So not too bad I think.

    Gustaf

  6. #6
    Bodger

    Join Date
    Sep 2016
    Location
    Dorking
    Posts
    74
    Thanks
    18
    Thanked 0 Times in 0 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Great work Gustaf 👍

  7. #7
    Spanner Monkey

    Join Date
    Mar 2012
    Location
    Shropshire
    Age
    34
    Posts
    395
    Thanks
    10
    Thanked 22 Times in 22 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Brilliant result and very similar spec to what I intend to build next year. Sticking with my stock bottom end again for next summer then a forged build at the end of next season.

  8. #8
    Pit Crew

    Join Date
    Mar 2012
    Location
    Belgium
    Age
    52
    Posts
    1,894
    Thanks
    7
    Thanked 167 Times in 145 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Nice done. Good old Pinto does it again. I feel this engine can be fine tuned for more. Maybe playing with some turbo's.

    On one of my budget Pinto turbo's we also had 275 bhp on 1,4 bar. Standard head, Sierra injection manifold. Using a Sierra Cosworth turbo (maybe slightly modded but can't remember anymore). Torque came in earlier but was never so high.

  9. #9
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,110
    Thanks
    3
    Thanked 83 Times in 81 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Yes, the "next step" in getting more or better power is something else turbo wise, another exhaust manifold (probably) and perhaps looking into E85.

    But that will wait, my plan is to just drive it in 2018 like this. I will make some small adjustments to other parts of the car but the engine will be left alone, as long as this setup also feels OK on the road.

    The "unmapped" driving this season showed that I really like the midrange from this smaller turbo so any changes need to keep the same kind of power/torque in the 3500-4500 range. Looking at the power plot it doesn't seem like a big difference but it felt a lot more "catchy" when driving.

    Gustaf

  10. #10
    TURBOSPORT SPONSOR Turbosport Subscriber
    Turbosport Moderator
    Turbosport Administrator
    Graham's Avatar
    My Race Car
    My 1st Project
    Join Date
    Feb 2006
    Location
    Ely, Cambs
    Age
    52
    Posts
    23,922
    Thanks
    236
    Thanked 1,940 Times in 1,815 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    and perhaps looking into E85.
    from my experience thats a 20-25% power gain

  11. #11
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,110
    Thanks
    3
    Thanked 83 Times in 81 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Quote Originally Posted by Graham View Post
    from my experience thats a 20-25% power gain
    Might well be, the biggest hurdle is that my local gas station does not carry E85. I'm lazy and don't want to have to travel in the opposite direction vs the track just to fill up.

    A friend just built a turbo Zetec in a Westfield, using E85 on a stock engine and that gave some really nice results.

    Gustaf

  12. #12
    Bodger

    Join Date
    Nov 2010
    Location
    Australia
    Posts
    139
    Thanks
    3
    Thanked 6 Times in 5 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    Thanks for the link to your thread Gustaf. Great to see your results here. I did cheat with mine. Built in my back yard shed then trailered it to one of the best tuners in Australia It's a flex fuel system and the base tune was 98 and at 14psi gave 242whp. Graham I only gained another 60hp on E85 (your figures are spot on) because of the smaller turbo- GT2860RS 0.86. But 300whp was my power goal and it has achieved that with fantastic response.
    Last edited by OZMK1; 20-04-2018 at 15:23.

  13. #13
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,110
    Thanks
    3
    Thanked 83 Times in 81 Posts

    Re: Turbo Pinto Capri, Mitsubishi 19T and 2.1 bar of boost

    That's a good power figure at such low boost. I was at 245 bhp on 1.1 bar but to be honest we didn't spend a great deal of time to optimise at that boost level.

    Gustaf

+ Reply to Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts