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9 Jul 2010, 22:21 (Ref:2724218)
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#1 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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1600 Kent FlyWheel Bolts?
Can these be reused, or are they one torque wonders?
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__________________
---------------------- Will race for food! :) 
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10 Jul 2010, 00:10 (Ref:2724248)
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#2 | ||
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Veteran
Join Date: Nov 2006
Posts: 9,412
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No they are not stretch bolts, I've re-used them loads of times and never had a problem, but I do Loctite them.
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__________________
Balls of steel (knob of butter) They're Asking For Larkins. ( Proper beer) not you're Eurofizz crap. Hace más calor en España. Me han conocido a hablar un montón cojones! Send any cheques and cash to PO box 1 Lagos Nigeria Africa !
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10 Jul 2010, 00:47 (Ref:2724256)
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#3 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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Cheers!
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__________________
---------------------- Will race for food! :)
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10 Jul 2010, 02:10 (Ref:2724269)
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#4 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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Oh yeah.... anyone got the specified torque for these?
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__________________
---------------------- Will race for food! :)
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10 Jul 2010, 05:15 (Ref:2724294)
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#5 | ||
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Rookie
Join Date: Nov 2009
Posts: 34
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55 Ft lbs with Red Locktite
~75nm |
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10 Jul 2010, 11:33 (Ref:2724372)
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#6 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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Thanks again!
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__________________
---------------------- Will race for food! :)
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10 Jul 2010, 15:58 (Ref:2724452)
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#7 | |
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Veteran
Join Date: Jun 2003
Posts: 1,229
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You can get some better ones with a higher strength, I think from Burton.
Fixings are free so they are ok to use. |
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11 Jul 2010, 14:01 (Ref:2724892)
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#8 | ||
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Rookie
Join Date: Aug 2005
Posts: 45
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Quote:
"g) The use of non-standard replacement fasteners, nuts, bolts, screws, studs and washers which are not connected with, or which do not support, any moving parts of the engine or its compulsorily retained accessories is permitted. However flywheel bolts are free: "b) Flywheel bolts are free and locating dowels are permitted." If anyone's got a more recent copy of the regs, including the most recent one which is reputed to allow a steel crank, but which I've never seen, then please let me know! Burton sell high tensile ARP flywheel bolts Simon Davey |
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11 Jul 2010, 22:24 (Ref:2725137)
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#9 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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Pegasus racing have the ARP bolts dirt cheap! I'll probably order a set for next time...
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__________________
---------------------- Will race for food! :)
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21 Jul 2010, 17:33 (Ref:2730249)
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#10 | ||
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Veteran
Join Date: Mar 2005
Posts: 578
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Historic FF allow ARP big ends bolts. Don't suppose anyone is going to argue about flywheel ones.
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22 Jul 2010, 07:18 (Ref:2730475)
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#11 | ||
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Racer
Join Date: Mar 2005
Posts: 110
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Flywheel bolts are cheap, I change them every time the engine gets rebuilt.
Interstingly I went through a phase where they kept breaking in short time frame (6 sessions) and spoke to the engine builder about using stronger bolts and was advised against it. The basis being that they broke before something else major did. After 3 sets I figured out what the problem was |
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22 Jul 2010, 08:33 (Ref:2730505)
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#12 | ||
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Racer
Join Date: Dec 2005
Posts: 118
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And?
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__________________
Every hole's a goal
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22 Jul 2010, 18:02 (Ref:2730740)
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#13 | |
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Veteran
Join Date: Nov 2006
Posts: 1,523
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Useful!
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22 Jul 2010, 21:23 (Ref:2730853)
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#14 | ||
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Veteran
Join Date: Nov 2006
Posts: 9,412
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Personally I have never had any bolts break either with a steel or alloy flywheel.
This is with almost 50 years of building and racing the Kent engine, some with power outputs in excess of 180hp. However this is only in saloon cars and not single seaters. I understand that the main cause of flywheel and crank breakage is caused by the shock of hitting the track with the bell housing if it bottoms out. |
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__________________
Balls of steel (knob of butter) They're Asking For Larkins. ( Proper beer) not you're Eurofizz crap. Hace más calor en España. Me han conocido a hablar un montón cojones! Send any cheques and cash to PO box 1 Lagos Nigeria Africa !
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22 Jul 2010, 22:58 (Ref:2730907)
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#15 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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Since my last reply, I ordered, received and installed a set of ARP bolts... I was originally going to replace the standard ones, but my local ford dealer was going to make that difficult for some reason. I have fancy bolts now and my mind is at ease!
I hope the other Aussie poster eventually replies and provides a conclusion to his story of broken bolts... |
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__________________
---------------------- Will race for food! :)
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23 Jul 2010, 03:02 (Ref:2730954)
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#16 | ||
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Racer
Join Date: Mar 2005
Posts: 110
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basically the flywheel had been around for a while, eventually found that the holes through the flywheel had elongated very slightly. I think this allowed the flywheel to oscillate on the bolts just enough during gear changes to eventually fatigue them until one would break, a second bolt would break and then they all went.
The other thing I forgot to mention was that the engine builder did not use dowels for exactly this reason, if the bolts broke it generally allowed the flywheel to spin on the end of the crank and do less damage to the engine or the car than if dowels where used where he found that it tended to break the crank more often than not in a similar situation. Most of the times that he had seen broken bolts where exactly as a result of the impact of the flywheel on the road or a kerb. as an aside There was an earlier post about steel cranks, they are allowed out here, refer to the ff website or CAMS page for the regs. |
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23 Jul 2010, 03:10 (Ref:2730958)
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#17 | ||
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Racer
Join Date: Mar 2005
Posts: 110
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Miles in Front - That's the Ford factory support for you. From memory the catalogue number in the manual has been wiped from the ford parts computer listing and is too hard to find. The only time I used the appointed dealer in Sydney to buy some bits it took 3 weeks, 7 phonecalls, 2 visits and a pink elephant to get the right bits, even with their catalogue number.
I now mainly use Larner, it's easy, its reliable, it fits and it arrives in the post in a couple of days. |
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23 Jul 2010, 05:40 (Ref:2730996)
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#18 | ||
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Rookie
Join Date: Oct 2009
Posts: 81
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Kewl! Thanks for the info!
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__________________
---------------------- Will race for food! :)
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