Modular Timing guide pivot/dowel upgrade - Yellow Bullet Forums

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Old 03-28-2012, 09:13 PM   #1
rtusnake
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Default Modular Timing guide pivot/dowel upgrade

I have noticed over the past couple years alot of the higher hp modular guys was starting to have problem with the stock timing dowels breaking in the teskid block. Most of them seem to come from spinning and catching traction, putting more of a strain on the timing components. We noticed there is a good bit more material in the block to accept a larger stud. We decided to step the stud size up to a M8x1.25 over the stock 6mm stud. Install is pretty straight forward, just redrilling and tapping the hole for the new stud. These will also work in the wap and iron blocks. Haven't seen as many failures in the iron blocks though. I haven't had my hands on a boss block but they should work if it uses a similar size stock dowel.This a pretty simple part to make if you know someone with a machine shop. We also made several sets if anyone needs some

The problem




New stud vs the old


Few extras
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Old 03-28-2012, 09:30 PM   #2
OJs99Cobra
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Default Re: Modular Timing guide pivot/dowel upgrade

never had an issue with the stocker? have a feeling whatever is causing that to occur will bust the bigger one as well. I think it would be more beneficial to modify tensioner so that it is not able to bottom out with change in oil pressure, which I believe is the issue when street driving and going on/off wide open throttle frequently.
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Old 03-28-2012, 09:35 PM   #3
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Default Re: Modular Timing guide pivot/dowel upgrade

Seems to be more of the higher powered street cars. First pic has happened to the same guy twice
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Old 03-28-2012, 09:38 PM   #4
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Default Re: Modular Timing guide pivot/dowel upgrade

Quote:
Originally Posted by rtusnake View Post
Seems to be more of the higher powered street cars. First pic has happened to the same guy twice
on/off throttle......tires break loose=off throttle, stab throttle when recover, repeat....
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Old 03-30-2012, 03:42 PM   #5
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Default Re: Modular Timing guide pivot/dowel upgrade

Nice product, we have been making them for some time. Another easier option is to use the tap-in dowel from the Iron block, you simply drill the hole (about .001 tho undersize on the hole for a nice press fit.) and tap the new dowel in with a hammer -no more threading etc. The best part is they cant come out because the timing cover wont let them.

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Old 03-30-2012, 04:13 PM   #6
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Default Re: Modular Timing guide pivot/dowel upgrade

When you install the dowels, do make them larger are just use the stock press in dowels for the iron blocks?
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Old 04-02-2012, 12:16 PM   #7
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Default Re: Modular Timing guide pivot/dowel upgrade

Quote:
Originally Posted by MMR Mustang View Post
Nice product, we have been making them for some time. Another easier option is to use the tap-in dowel from the Iron block, you simply drill the hole (about .001 tho undersize on the hole for a nice press fit.) and tap the new dowel in with a hammer -no more threading etc. The best part is they cant come out because the timing cover wont let them.

MMR
I have broke even these! But have moved to larger than stock tool steel dowels.
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Old 04-02-2012, 12:17 PM   #8
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Default Re: Modular Timing guide pivot/dowel upgrade

Quote:
Originally Posted by OJs99Cobra View Post
on/off throttle......tires break loose=off throttle, stab throttle when recover, repeat....
Your a smart man. 100 Street miles do more damage than 1000 track passes with these mod motor timing sets.
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Old 06-03-2014, 02:57 PM   #9
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Default Re: Modular Timing guide pivot/dowel upgrade

Do you still have these upgraded pivots available?
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