G130 YCF sprint car

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Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Sat Oct 10, 2020 2:34 pm

Cheers guys, yes we were both relatively upset yesterday but Wayne was great, hes sees all sorts of failures as you would expect. We have slept on it and are fired up again, especially given that other than the clutch and boost leak things appear to be spot on. We are going to try and get it nailed asap and be back at some point towards the start of November. Plug wise im going to take his lead on it and maybe take a few sets and some feeler gauges so we can gap them. what do you guys think of the power delivery displayed in that graph? missfire aside...


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philhoward
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G130 YCF sprint car

Post by philhoward » Sat Oct 10, 2020 3:25 pm

That first curve looks promising (extrapolating the torque from it) - you can see the torque pick up probably as the turbo is starting to wake up but as an initial pull it looks good on wastegate pressure alone. We can ignore the misfire wobble for now.

For such a build that’s a very good start. I’m sure the dip between 80 and 100 can be flattened out when it comes to playing with the boost and maybe a fiddle with the mapping.

It’s very promising.


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G130 YCF sprint car

Post by philhoward » Sat Oct 10, 2020 3:28 pm

I think your biggest issue will be a clutch to cope with the torque and still remain useable in the road..


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Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Sat Oct 10, 2020 3:30 pm

yeah I agree, I absolutely do not want to go back to a paddle clutch, to be fair there are plenty of normal cars kicking around making 350ftlbs+ with normal type clutches. We are going to have a chat with the clutch specialist that sorted this one for us.


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G130 YCF sprint car

Post by philhoward » Sat Oct 10, 2020 3:39 pm

That’s the best option - speak to a clutch man that knows their onions.

Set a figure (like 300lb/ft), see if you can get a clutch to cope with that and then set that as the limit in the map. If the clutch only gets rated for 280lb/ft, let Wayne know that’s his limit - he should be able to map it to that. Saw the write up (from J-Cal) for an MX5 engine mapped to a torque limit (1.8VVT where the rods are only good for 200lb/ft I think) - you just get a flat torque curve instead which isn’t a bad thing as it makes it linear in delivery. You set a hp ceiling based on the cam though...


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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sat Oct 10, 2020 7:12 pm

25 thou is a good start on plug gap, very unlikely to get the spark blown out but wide enough to give a good burn. Nissan specify 1.1mm (39 thou) but thats really for emissions i believe.

My Sabre runs a top end Exedy organic but not paddle. Excellent road manners, specced by Stew B so youd expect it to be 'right'. Runs 360ish lb/ft. Personally i prefer my AP paddle with nismo cover from Batmobile purely for the track but its less paddock friendly


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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sat Oct 10, 2020 7:17 pm

Ref clutches moderns have the clamping pressure the expected power output BUT the friction material isnt really up to it. Hard launches (is their any other kind??!! :lol: ) overheats and glazes the surface meaning it slips (same effect as road brake pads and track work). You really need some form of competition friction material, the modern organics work well at all temps so great for road and track, whereas the sintered paddles really need a little temp or they can judder. Not ideal in the paddock and if it judders on launch can add to transmission shocks


Racing is life, everything before and after, is just waiting--Steve McQueen
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RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sat Oct 10, 2020 7:19 pm

Have you got a dyno plot Darryl? That pic shows power vs riad speed, rather than the normal bhp/torque/AFR vs rpm?


Racing is life, everything before and after, is just waiting--Steve McQueen
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RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sat Oct 10, 2020 7:25 pm

And just to make you feel better, my ss1 when first mapped had trigger issues, bracket wobbled at about 4.7k rpm :roll: then trigger wheel was few thou out of true :roll: and id cocked up fuel pump wiring, and, and, and, shall i go on??! You guys have done a mega job 8)


Racing is life, everything before and after, is just waiting--Steve McQueen
6 time Class Champ, 2006 & 2014 SSSC Champion

RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
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scimmy ben
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G130 YCF sprint car

Post by scimmy ben » Sun Oct 11, 2020 6:28 am

Wayne has LOADs of experience with CA18ETs, going back aaaaaages. He used to take Peugeot 405 ECUs and repurpose them for Silvias. Some of the innovators (and those savvy enough not to listen to Peter Rosenburg from Silvia Engineering), like Ken Finn used to get decent power and Fast Car magazine articles on the basis of Wayne's work.

Don't be too dispirited by the snagging, the one thing I've taken from reading Dave Walker over the years, is the amount of cars that take a few trips to the rollers to iron out the issues - better there than on the track :wink:



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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sun Oct 11, 2020 8:01 am

Ben
Jon Hurley now has Ken Finns silvia :) Id forgotten Wayne used the different ecus on ETs, gotta be early 2000s when we were all on s12oc? Was talking to Jon this week and he said Richard Kimberely has got his old red silvia back too!


Racing is life, everything before and after, is just waiting--Steve McQueen
6 time Class Champ, 2006 & 2014 SSSC Champion

RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
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scimmy ben
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G130 YCF sprint car

Post by scimmy ben » Sun Oct 11, 2020 12:29 pm

CNHSS1 wrote:
Sun Oct 11, 2020 8:01 am
Ben
Jon Hurley now has Ken Finns silvia :) Id forgotten Wayne used the different ecus on ETs, gotta be early 2000s when we were all on s12oc? Was talking to Jon this week and he said Richard Kimberely has got his old red silvia back too!
They'll be going bak up in price like all those Escorts and Sierras :)



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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sun Oct 11, 2020 2:25 pm

Yep, its the AE86s less attractive cousin :lol: and 86s are mega money now! :shock:


Racing is life, everything before and after, is just waiting--Steve McQueen
6 time Class Champ, 2006 & 2014 SSSC Champion

RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
Image

Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Sun Oct 11, 2020 7:19 pm

I will ask Wayne if hes got a copy of the graph. So we have an answer and several other issues to deal with, our guess that the slave had travelled too far and popped was correct, the reason it did this is the bump stop for the pedal has either fallen off or we forgot to fit it, I say this because its no where to be seen, if it had fallen off it would have been in the footwell. Theres a nice big crack in the welds holding the bell housing to the gearbox so its probably a good thing the slave failed, this will be going to the fabricator along with the inlet manifold.


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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Sun Oct 11, 2020 7:58 pm

Blessing in disguise as a hard dyno pull couldve seen box come apart, you have the luck on your side DC 8)


Racing is life, everything before and after, is just waiting--Steve McQueen
6 time Class Champ, 2006 & 2014 SSSC Champion

RIP Batmobile, await the Rise of Dark Knight 8)
Sabre 'Light Sabre' 360hp!!
Image

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