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Thread: XU10J4 Dyno

  1. #1
    1000+ Posts PeterT's Avatar
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    Default XU10J4 Dyno

    Here's an interesting pair of figures, for Parry's engine which I've just finished rebuilding and was tuned today. The blue figures are for the original 11.25:1 XU9J4 which spun a bearing and died. The red figures are for a 12:1 XU10J4, same XU9J4 head as before, but with a slightly smaller inlet cam. We built it for torque. Nice figures, right? Except it's HP at the wheels. The dyno operator only does race cars and he rates it as the 5th best N/A 2L he's ever done.

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    Attached Thumbnails Attached Thumbnails XU10J4 Dyno-parry-xu10j4.jpg  
    parry, Mungous, lion5 and 3 others like this.

    '92 205 Mi16
    '90 Mi16x4

  2. #2
    1000+ Posts cam85's Avatar
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    Nice work boys! Bet you cant wait to drive it!

    When is the first dash?
    98 Xantia CT
    94 205 Gti Classic #9
    92 405 Mi16
    87 205 GTi Race Car
    http://www.aussiefrogs.com/forum/res...-race-car.html

  3. #3
    1000+ Posts cam85's Avatar
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    Parry being behind the wheel of course!
    98 Xantia CT
    94 205 Gti Classic #9
    92 405 Mi16
    87 205 GTi Race Car
    http://www.aussiefrogs.com/forum/res...-race-car.html

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    1000+ Posts pgti6's Avatar
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    What exhaust manifold does it use? Standard, GTi6, custom, 4-1, 4-2-1?
    Track car-Steel Grey 405 Mi16 2.2 litre


    405 Track car build thread moved to-
    http://forum.205gtidrivers.com/index...ic=143279&st=0

    Lap times-
    Sandown 1 27.9
    Phillip Island 1 53.8

    Previous Frenchies-
    1988 205Gti
    1998 306 GTi6
    1997 306 N5 sedan
    1996 306 N3 XT hatch
    1976 Renault R16TS manual in Avocado
    1976 Renault R16TS manual in Trak Yellow
    1975 Renault 5 Guernsey, Channel Islands
    1972 Renault 4 Guernsey, Channel Islands

  5. #5
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    standard xu9j4
    Adrian Wuillemin

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    1000+ Posts Andrew Ch's Avatar
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    That's a great result bloody hell will be a hoot to drive !

  7. #7
    1000+ Posts pgti6's Avatar
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    In excess of 122hp/litre N/A!
    Track car-Steel Grey 405 Mi16 2.2 litre


    405 Track car build thread moved to-
    http://forum.205gtidrivers.com/index...ic=143279&st=0

    Lap times-
    Sandown 1 27.9
    Phillip Island 1 53.8

    Previous Frenchies-
    1988 205Gti
    1998 306 GTi6
    1997 306 N5 sedan
    1996 306 N3 XT hatch
    1976 Renault R16TS manual in Avocado
    1976 Renault R16TS manual in Trak Yellow
    1975 Renault 5 Guernsey, Channel Islands
    1972 Renault 4 Guernsey, Channel Islands

  8. #8
    1000+ Posts parry's Avatar
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    Just entered the Formula Vee 50th anniversary in the Super TT category run on Feb 14th and 15th, who wants to come down and keep me company?
    90 205 Gti Cherry Red(Track Car)
    2009 207gti
    1985 505gti (Shitbox Rally) Sold

    PBs:

    Oran Park: 1:27:9
    Wakefield: 1:05.6 (July 2015)
    Eastern Creek: 1:54 (8v) 1:48 (16V)
    Mt Huntley: 34.44 (2004 stock 205)
    Ringwood: 35.06 (30/10/2005)
    Winton: 1:33.6 (2017)

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    in half the weight of your 405 pgti6, it should be a hoot
    Adrian Wuillemin

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    1000+ Posts pgti6's Avatar
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    Quote Originally Posted by Adrian Wuillemi View Post
    in half the weight of your 405 pgti6, it should be a hoot
    Ha! I might make it a convertable to compensate!
    Track car-Steel Grey 405 Mi16 2.2 litre


    405 Track car build thread moved to-
    http://forum.205gtidrivers.com/index...ic=143279&st=0

    Lap times-
    Sandown 1 27.9
    Phillip Island 1 53.8

    Previous Frenchies-
    1988 205Gti
    1998 306 GTi6
    1997 306 N5 sedan
    1996 306 N3 XT hatch
    1976 Renault R16TS manual in Avocado
    1976 Renault R16TS manual in Trak Yellow
    1975 Renault 5 Guernsey, Channel Islands
    1972 Renault 4 Guernsey, Channel Islands

  11. #11
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    Looks excellent! Getting so much torque at 3000rpm from a NA engine is awesome!

    Does anyone have dyno figures for a stock XU10J4?

  12. #12
    1000+ Posts PeterT's Avatar
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    I found this std XU10J4 graph on the 205 Forum.
    Attached Thumbnails Attached Thumbnails XU10J4 Dyno-screen-shot-2015-02-06-2.06.31-pm.jpg  
    FedGrapes likes this.

    '92 205 Mi16
    '90 Mi16x4

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    Fellow Frogger! FedGrapes's Avatar
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    Thanks Peter. I was actually looking for something earlier this week, but after a couple of hours of searching, I came up empty handed. I know where to look now!

    How would the one test show both power at the wheels, and at the flywheel? I'm assuming that's what the two different values of Engine Power and Wheel Power show?

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    Impressive, should I use these cams with an 11.8 to 1 XU9 then?

    Quote Originally Posted by PeterT View Post
    Here's an interesting pair of figures, for Parry's engine which I've just finished rebuilding and was tuned today. The blue figures are for the original 11.25:1 XU9J4 which spun a bearing and died. The red figures are for a 12:1 XU10J4, same XU9J4 head as before, but with a slightly smaller inlet cam. We built it for torque. Nice figures, right? Except it's HP at the wheels. The dyno operator only does race cars and he rates it as the 5th best N/A 2L he's ever done.

  15. #15
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    You should ditch the xu9 and build an iron block combo.

    Dont forget it has big valves, solid lifters, good valve springs, dry sumped, 48mm throttle bodies etc......
    Adrian Wuillemin

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    Quote Originally Posted by PeterT View Post
    Here's an interesting pair of figures, for Parry's engine which I've just finished rebuilding and was tuned today. The blue figures are for the original 11.25:1 XU9J4 which spun a bearing and died. The red figures are for a 12:1 XU10J4, same XU9J4 head as before, but with a slightly smaller inlet cam. We built it for torque. Nice figures, right? Except it's HP at the wheels. The dyno operator only does race cars and he rates it as the 5th best N/A 2L he's ever done.
    Phil Armour? Good mechanic.

  17. #17
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    Not concerned about getting that much power but after good torque and no pinging on 11.8 compression. I already have a heap of XU9s and the pistons.
    I do have the special stroker crank that would give me around 2.3 litres in an XU10 so could be interested in the iron block yet.


    Quote Originally Posted by Adrian Wuillemi View Post
    You should ditch the xu9 and build an iron block combo.

    Dont forget it has big valves, solid lifters, good valve springs, dry sumped, 48mm throttle bodies etc......

  18. #18
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    Very impressive.
    I'd like to build up at EW10J4S to that level and beyond (I've found examples claiming 270bhp atw). Who should I get in touch with?

  19. #19
    1000+ Posts cam85's Avatar
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    Bluey could walk you through it.
    98 Xantia CT
    94 205 Gti Classic #9
    92 405 Mi16
    87 205 GTi Race Car
    http://www.aussiefrogs.com/forum/res...-race-car.html

  20. #20
    1000+ Posts parry's Avatar
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    Quote Originally Posted by nekminnit View Post
    Phil Armour? Good mechanic.
    Phil Armour is not a Mechanic he is a tuner. That's all he does.....
    90 205 Gti Cherry Red(Track Car)
    2009 207gti
    1985 505gti (Shitbox Rally) Sold

    PBs:

    Oran Park: 1:27:9
    Wakefield: 1:05.6 (July 2015)
    Eastern Creek: 1:54 (8v) 1:48 (16V)
    Mt Huntley: 34.44 (2004 stock 205)
    Ringwood: 35.06 (30/10/2005)
    Winton: 1:33.6 (2017)

  21. #21
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by speaksgeek View Post
    (I've found examples claiming 270bhp atw). Who should I get in touch with?
    God, for those sought of figures.
    addo and chez00 like this.

    '92 205 Mi16
    '90 Mi16x4

  22. #22
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    Quote Originally Posted by PeterT View Post
    God, for those sought of figures.
    Yes, im sure. I just re-read that. I meant at the flywheel obviously. Still a lot...

  23. #23
    1000+ Posts parry's Avatar
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    Quote Originally Posted by speaksgeek View Post
    Yes, im sure. I just re-read that. I meant at the flywheel obviously. Still a lot...
    275 is achievable but at what cost? Reliability?

    This motor is quite tame and sits at close to 250hp, I am happy
    90 205 Gti Cherry Red(Track Car)
    2009 207gti
    1985 505gti (Shitbox Rally) Sold

    PBs:

    Oran Park: 1:27:9
    Wakefield: 1:05.6 (July 2015)
    Eastern Creek: 1:54 (8v) 1:48 (16V)
    Mt Huntley: 34.44 (2004 stock 205)
    Ringwood: 35.06 (30/10/2005)
    Winton: 1:33.6 (2017)

  24. #24
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by GRAHAM WALLIS View Post
    Impressive, should I use these cams with an 11.8 to 1 XU9 then?
    Probably not, as they're a solid grind. There's plenty of comparable hydraulic grinds however. Making an engine like this is all about getting the whole package matched, including gearbox, cwp and wheel diameter. Parry's engine has flat top pistons, not domed, which makes a considerable difference to flame travel. I'd still build yours at 11.8:1 and cam it appropriately to get 8.5-9:1 dynamic CR.

    '92 205 Mi16
    '90 Mi16x4

  25. #25
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    Quote Originally Posted by parry View Post
    275 is achievable but at what cost? Reliability?

    This motor is quite tame and sits at close to 250hp, I am happy
    I would be very happy with that. I'm not really sure where to start, but an aspirational goal is one thing.

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