G130 YCF sprint car

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philhoward
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G130 YCF sprint car

Post by philhoward » Sun Oct 11, 2020 8:10 pm

Dcrosby13 wrote:
Sun Oct 11, 2020 7:19 pm
Theres a nice big crack in the welds holding the bell housing to the gearbox
:shock: :shock:


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G130 YCF sprint car

Post by philhoward » Sun Oct 11, 2020 8:13 pm

Clutch stop bolt is an M6 with a lock nut (only know because I measured one on Friday for the clutch switch :lol: ) - don’t think it fell off... :w


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G130 YCF sprint car

Post by philhoward » Sun Oct 11, 2020 8:14 pm

Ah - you’re using a BMW pedal? In which case ignore me :mrgreen:


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MikeyBikey
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G130 YCF sprint car

Post by MikeyBikey » Sun Oct 11, 2020 9:01 pm

Getting there, it’s impressive stuff and your pushing the envelope, so incredibly well done. :hurrah: :hurrah:


Is we sideways yet...

Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Mon Oct 12, 2020 8:01 am

Thanks Mikey, Im pretty sure the crack in the bell housing is due to the propshaft being out of balance, I accidentally managed to split the front half from the rear, dad took it back to them and he quickly threw it back together and said if it wobbles flip 180. We did mention this to Wayne and when he started hitting north of 100 mph on the dyno we just assumed he was happy with it, afterwards he said you might want to check your prop :shock: so yeah a prop out of balance at 130 would do some damage to some already shitty welds.


I break stuff...... :w

Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Mon Oct 12, 2020 8:02 am

this time its going to the new fabrication guy who done all of he welding in the last 12 months.


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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Mon Oct 12, 2020 8:57 am

Is the prop out of balance or out of phase DC?


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Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Mon Oct 12, 2020 9:34 am

Balance


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Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Mon Oct 12, 2020 7:07 pm

Propshaft dropped off for balancing, this time im painting a bloody big yellow line down both halves


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G130 YCF sprint car

Post by CNHSS1 » Mon Oct 12, 2020 8:52 pm

:lol: :lol:


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Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Mon Oct 19, 2020 12:03 pm

Dads spent a few days focusing on detail, Wayne commented that the boost was building slowly and albeit we have a boost leak between the plenum and the runners its not significant enough to cause that. At first we thought the timing might be out but on inspection its correct, dads sorted the crank sensor mount so it definitely wont be flopping about at high RPM:

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hes also spent quite alot of time focusing on the gearbox and clutch slave, he has taken plenty of measurements and we will be making a jig and starting over due to the damage caused by the prop shaft which has since been balanced and they have confirmed that it was out by quite abit which is promising. One odd thing I found whilst stripping the cold side down was that the inlet ports were abit oily and there were some small puddles of oil at the base of the runners only, the top of the runners and plenum are dry along with the turbo, intercooler and all of the boost pipes. We have good compression at 180psi across all four and the head was rebuilt not so long ago and would have had new valve stem seals at that point, ontop of all that the breathers are clear and there were no signs of anything odd at the catch can breather, the plugs are nice and dry and the exhaust was not smoking so im open to suggestions guys.

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There are probably going to be a few weeks between updates as we wait for parts and machine work to be completed.


I break stuff...... :w

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G130 YCF sprint car

Post by efi_sprintgte » Mon Oct 19, 2020 12:23 pm

Could be a restricter is needed in the turbo oil feed.


JC

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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Mon Oct 19, 2020 12:56 pm

If itsba ball bearing turbo will defo need a restrictor or will bugger the seals with too much flow. Got mine from turbo dynamics iirc


Racing is life, everything before and after, is just waiting--Steve McQueen
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Sabre 'Light Sabre' 360hp!!
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Dcrosby13
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G130 YCF sprint car

Post by Dcrosby13 » Mon Oct 19, 2020 1:49 pm

Sorry I should have said we already have one fitted, I spoke to Turbozentrum and bought one at the same time as the turbo based on DET oil pressure.


I break stuff...... :w

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CNHSS1
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G130 YCF sprint car

Post by CNHSS1 » Mon Oct 19, 2020 1:55 pm

How much running has engine had? Could be a little blow by oil getting past the oil control rings as bores arent fully bedded?


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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