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Thread: pete a 2.2 200 and a bit bhp pinto

  1. #201
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    Re: pete a 2.2 200 and a bit bhp pinto

    The afr scale could do with being shortened....it seems to run rich around the two dips....12.2:1 although the graph scale makes it look worse than it actually is.

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    Re: pete a 2.2 200 and a bit bhp pinto

    I can show hundreds of power graphs and if it is a race engine, always dips and bumps. The small once you can never get rid off. With a bit of luck you can place them to other points by making the inlet track shorter or longer, playing with the exhaust 4-2-1 configuration etc... Only with relative soft cams you can get a nice ballon curve. But it's because softer cams have less of these things, the best cam will be the soft one.

    Indeed, these small dips are not noticed while driving. But when the engine is long in low torque round 3000 RPM and it's a rally engine, it will feel smoother in short situations. I'm always concerned about the whole graph, not peak power only.

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    Re: pete a 2.2 200 and a bit bhp pinto

    Quote Originally Posted by dazzle View Post
    Well that's good because you don't have to be because it's not yours!!
    Thank God for that !

    Quote Originally Posted by onyd View Post
    I'm always concerned about the whole graph, not peak power only.
    That's what I mean.

    Quote Originally Posted by onyd View Post
    248 Kw, this is not a Pinto I guess ?
    The power is on the left axis so almost 150 kW, torque is on the right axis almost 240 Nm.

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    Re: pete a 2.2 200 and a bit bhp pinto

    150KW / 240Nm I can not believe. This has no harmony in the calculation.

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    Re: pete a 2.2 200 and a bit bhp pinto

    Quote Originally Posted by Escort TC View Post
    150KW / 240Nm I can not believe. This has no harmony in the calculation.
    thats not the engine this thread is about anyway

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    Re: pete a 2.2 200 and a bit bhp pinto

    Question - how do these long stroke pinto's rev compared to a square or over square unit??

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    Re: pete a 2.2 200 and a bit bhp pinto

    its got an 80mm stroke on emeralds rollers it was pulling like a train to 7500.

    andy pipes which has an 86mm stroke and whilst it dont make any real power at such revs pulled smoothly round to 8700 on T+R's rollers, on track he is revving it to 8 all the time

    rev wise the longer stroke doesnt seem to notice in either,

    both have longer than std rods, although not massively, cant remember the length of 1600 diesel rods in the 2.2 but they are about 129mm, and andys has custom steel 131.5mm rods
    Last edited by Graham; 18-08-2015 at 12:15.

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  9. #208
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    Re: pete a 2.2 200 and a bit bhp pinto

    Quote Originally Posted by Graham View Post
    it is on throttle bodies, i must admit those graphs look so messy i cant see a mixture on them!
    As Graham said, it is on throttle bodies. Short 42mm Jenveys I think

    This might help Graham



    Quote Originally Posted by Graham View Post
    peaks and dips can usually BUT NOT always be mapped out, ive run enough race cars on the rollers to know that its not always possible, if teh primary cause is teh mixture going off at that point then yes to a point, but if its because of a "bad" intake length, or perhaps pulse in the induction caused by say an inner wing or air box, or maybe even exhaust design, you might correct the mixture, you might smooth it out with a timing adjust, but if at those points there simply isnt as much air getting into the combustion chambers you are going to get a dip no matter what the mapper does.
    Both places I got it mapped both said the same thing, ref they thought it might be the exhaust system

    Quote Originally Posted by Graham View Post
    i bet one thing for sure dazzle wont feel it when he drives the car !
    At last, a worthwhile relevant statement and true

    Quote Originally Posted by Graham View Post
    it pulled so quickly through the dip you never knew it was there.
    which is the same as above. Mines not a race car but I've never noticed it, thanks Graham
    Cheers

    Dazzle


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    Re: pete a 2.2 200 and a bit bhp pinto

    So, I thought I would put these up....





    The setup belongs to my friend who I might be joining/investing in his business

    It's a DYNOmite hub dyno which has the ability to hold at set rev's and map for different load sites. An accurate good piece of kit.


    That was with the Airbox


    This was the glory run at the end with the airbox removed so you could hear it in full glory

    Cheers

    Dazzle


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    Re: pete a 2.2 200 and a bit bhp pinto

    cool,

    power at the wheels was still same as when it was on rollers over here so you havnt worn it out yet

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    Re: pete a 2.2 200 and a bit bhp pinto

    Probably even better due to the difference in altitude levels!?
    Was expecting it to be less so was pleased with that result
    Cheers

    Dazzle


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    Re: pete a 2.2 200 and a bit bhp pinto

    Top Job lads What was the reason for the coolant pressurising?


    There's a wee write up on this engine on the Emerald website: http://www.emeraldm3d.com/articles/oct2011/

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    Re: pete a 2.2 200 and a bit bhp pinto

    hi graham is 40 hp loss through drive train correct here in australia we think 30 hp loss is more correct your ideas cheers mario.

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    Re: pete a 2.2 200 and a bit bhp pinto

    depends on how much power it makes in the first place, not to mention whether rollers are single or twin, narrow tyres or wide sticky slicks, loosing 40bhp off 200 is 20%

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    Re: pete a 2.2 pinto

    Quote Originally Posted by Graham View Post


    diesel rod next to a very similar looking x/flow rod



    big ends are 1mm too wide to fit a pinto crank so i made a jig to narrow them in the lathe


    diesel rods are a little on the heavy side so i've started to lighten them a bit, first remove the big balencing pad from the small end

    Hi Graham,
    Bit of a resurrection of an old thread, but I'd like to ask you a question regarding the big end side of the diesel conrod and it's bearings. I understand that the big end is about 1mm too wide and has to be machined smaller, but what's the score with the bearings. Do the new bearings that go with the diesel rods also need to be made smaller on their width, or do they still fit OK straight out of the box?
    Thank you in advance for your advice.

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    Re: pete a 2.2 200 and a bit bhp pinto

    bearings are ok straight out the box. you cant get 1600 diesel bearings any more though, but you can use 1800 ones, the only difference is 1800 ones dont have location tags, but they will work just fine

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    Re: pete a 2.2 200 and a bit bhp pinto

    Quote Originally Posted by Graham View Post
    bearings are ok straight out the box. you cant get 1600 diesel bearings any more though, but you can use 1800 ones, the only difference is 1800 ones dont have location tags, but they will work just fine
    Thank you for the prompt reply and advice.
    I've been lucky and sourced 8 rods (2 sets) and new sealed 1.6D bearings with the tabs. Click image for larger version Name:	IMG_20180618_201419702~01~01.jpg Views:	149 Size:	128.2 KB ID:	82881

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    Re: pete a 2.2 200 and a bit bhp pinto

    Click image for larger version Name:	IMG_20180504_152621342~01.jpg Views:	148 Size:	123.5 KB ID:	82882
    I was a bit greedy and couldn't resist buying the second set. ��

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