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XRAY T4'20 SPEC

Old 02-04-2020, 05:56 AM
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Just getting back into TC after a several year hiatus and I'm gonna go Xray for the popularity in my area and the continued factory support year in and year out. The last TC that I wheeled was a TOP Photon

What are the mandatory 'spares' to have on hand, and what are the 'must have' hop ups for XRAY cars?
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Old 02-04-2020, 06:06 AM
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Originally Posted by daleburr View Post
I also glue the bearings into the alu bellcranks. I use a small amount of blue threadlock (loctite) on the outer edge of the bearing. Gets rid of the play, but you can still remove the bearings when needed.
I was going to tear the steering apart for the Nth time again tonight, so I will do that too... a tiny tiny amount of CA should do I guess (we don't have permatex here)

thanks guys!

Paul
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Old 02-04-2020, 06:10 AM
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Originally Posted by Buckaroo View Post
Just getting back into TC after a several year hiatus and I'm gonna go Xray for the popularity in my area and the continued factory support year in and year out. The last TC that I wheeled was a TOP Photon

What are the mandatory 'spares' to have on hand, and what are the 'must have' hop ups for XRAY cars?
Yeah, Top Photon!

Spares - c-hubs, front spindles, rear spindles. They do break (c-hubs) or strip threads (spindles) if you crash hard enough but I've had whole seasons since the T3 '12 when I wouldn't break one single part. But it doesn't hurt to have a couple of spares I guess

"mandatory" hopups: 2.5-2.8 prog springs fronts, 2.6 and possible 2.7 rears. Crash brace for the T4'20, included if you get a '19 (please don't get us started again haha). Some spare alloy M3 washers (1.0, 1.5, 2.0mm...) for setup. And that's it, really... you do pay a lot of money to get the kit, but you get your money's worth, with possibly the most reliable car on the market today

Last edited by Lonestar; 02-04-2020 at 07:52 AM.
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Old 02-04-2020, 06:58 AM
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What's the difference between Xray HARD and GRAPHITE parts? Hard have a little more 'give' and Graphite stiffer but more brittle?
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Old 02-04-2020, 07:04 AM
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Originally Posted by Buckaroo View Post
What's the difference between Xray HARD and GRAPHITE parts? Hard have a little more 'give' and Graphite stiffer but more brittle?
It's more about flex. A tuning option. Graphite being the hardest, and yes, more brittle. But still hard to break.
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Old 02-04-2020, 09:31 AM
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I would also pick up a few front arms. I’ve had a few crack at the horseshoe part around the Chub, just past the hinge pin where it gets really thin. Not a DNF, but Makes for a very poor handling car! I usually run the Hard arms as the graphite crack easier.
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Old 02-04-2020, 11:09 AM
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OK. How do I tell the difference in Xray springs. Is it in wire thickness or etched on the spring somewhere? Cross reference chart?
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Old 02-04-2020, 11:47 AM
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You're Welcome !
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Old 02-04-2020, 12:07 PM
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Originally Posted by Buckaroo View Post
OK. How do I tell the difference in Xray springs. Is it in wire thickness or etched on the spring somewhere? Cross reference chart?
the spring rate is etched on one end of the spring. It is pretty small but should be easy to see (at least when new)
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Old 02-04-2020, 05:41 PM
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Did anybody try out the rcmaker top deck for the T4 20? Let me know how it handles..
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Old 02-04-2020, 05:46 PM
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Originally Posted by tony q View Post
Did anybody try out the rcmaker top deck for the T4 20? Let me know how it handles..
Tried it the other day car definately flexes more and feels more direct with it (on outdoor asphalt) only did a few laps but I can see it being useful when grip is low.


Not essential, but a handy tuning aid to try
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Old 02-04-2020, 07:50 PM
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Originally Posted by nexxus View Post
Tried it the other day car definately flexes more and feels more direct with it (on outdoor asphalt) only did a few laps but I can see it being useful when grip is low.


Not essential, but a handy tuning aid to try
thanks I guess it won’t work on black carpet
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Old 02-05-2020, 04:17 AM
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Originally Posted by tony q View Post
thanks I guess it won’t work on black carpet
it works fine on the black carpet. I purchased the top deck just for easy removal of top deck, and I was properly surprised with quicker lap times...
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Old 02-05-2020, 12:00 PM
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Sorry to be an Xray newb and a pain with questions. Rear Toe: Kit includes 0degree rear hubs, basic assembly shows 0 rear toe, but basic set up sheets show 3degrees rear toe. Is this achieved with hubs, eccentric bushing placement, or a combo of both?
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Old 02-05-2020, 12:21 PM
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Originally Posted by Buckaroo View Post
Sorry to be an Xray newb and a pain with questions. Rear Toe: Kit includes 0degree rear hubs, basic assembly shows 0 rear toe, but basic set up sheets show 3degrees rear toe. Is this achieved with hubs, eccentric bushing placement, or a combo of both?
Perfectly reasonable question. You change toe mostly by choosing combinations of the eccentric bushings. Page 15 of the assembly manual talks to this.

The standard setup is 3 degrees (bushings with centre dot), which is a function of the location of the mounting blocks, so the bushings are the tuning mechanism from there. You can also adjust rollcenter/anti-dive with the bushings.
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