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Old 11-28-2004, 10:10 PM   #10486
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Default Re: Xtreme Racing and BMI CF Chassis Kits

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Originally posted by Impulse_racer
Someone asked a few pages back about the Xtreme Racing CF Chassis kit. After reading the good things about the BMI Chassis I was about to order one until I saw an Xray FK with an Xtreme CF chassis kit in RED on Stormer Hobbies websight. Does anyone know about the quality of the Xtreme kits?
Thank for the responses, BMI it is.
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Old 11-29-2004, 02:42 AM   #10487
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Xray XRC chassis : 3.5mm thick

BMI chassis : 2.5 mm thick ( it said "direct replacement" )

Aargh.... I think I stick with XRC, more over I don't know the quality improvement over BMI graphite? Is it harder to scracth? I can tell for sure that original Xray graphite is harder to scratch than yokomo mr4tc sd.
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Old 11-29-2004, 03:24 AM   #10488
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Quote:
Originally posted by asw7576
Xray XRC chassis : 3.5mm thick

BMI chassis : 2.5 mm thick ( it said "direct replacement" )

Aargh.... I think I stick with XRC, more over I don't know the quality improvement over BMI graphite? Is it harder to scracth? I can tell for sure that original Xray graphite is harder to scratch than yokomo mr4tc sd.
Irregardless whether which chassis you use, it'll scratch whether you like or not. It will scratch even if you play it on carpet. Unless you put it on display.

I'm using BMI chassis for my TC3 and I must say it is SPOT ON !!
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Old 11-29-2004, 03:38 AM   #10489
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Yes, I know all kind of chassis eventually will scracth and worn out, but I'm talking about harder to scratch things. My yokomo scracth like hell after few runs while my xray show little sracthces or more durable.

If I observe the chassis closely, xray chassis have glossy finish while yokomo is none.
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Old 11-29-2004, 06:37 AM   #10490
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Both your Yoke and your Xray are likely scratched the same amount...the Yoke probably shows it more if it's silver....

I think the BMI chassis is 3.0mm.....it's super stiff and lighter than the XRC.

Reports comparing the two chassis' earlier in this thread indicated that the BMI although it was lighter and thinner, was actually stiffer than the XRC...

If you're goign to be runnig your graphite chassis car on asphalt or other abrasive surfaces you may want to consider using chassis protector sheets...
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Old 11-29-2004, 07:29 AM   #10491
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the bmi graphite is layed at 0, 45 and 90 degree, where as the xray chassis is layed at 0 and 90 degree. that is why the bmi is more rigid of a chassis then the xrc. that is also why xray needed an extra .5mm. If I remeber the xrc is a little more rigid front to back, but the bmi is more rigid as far as twisting.
The suggested config for the xray is to run the left batt forward. So the wire between the saddle pack is longer. I think that is harder to deal with on a tray and in your storage box. The bmi chassis has 3 options right now. you can have the batts almost in stock just move in, you can have the batts .350" move forward or you can have them staggered. The xrc has all the cut out, but to center the weight more you will need to run staggered. The bmi .350" is actually very close in static balance to the xrc with the batts staggered. I actually have run both and they feal real close to each other (BMI .350" and xrc) with the same setup.
Also, Jason did not cutout the servo because if did not make that much of a difference in the cg of the car, but it did make a lot of difference in the rigidity of the car, when you cut a layer of carbon out that big.
so for me, the deciding factor was $$$. the BMI is $79 for both chassis and top. the xrc averages $95 for just the chassis, you will still need to purchase the top deck.
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Last edited by theisgroup; 11-29-2004 at 07:34 AM.
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Old 11-29-2004, 08:22 AM   #10492
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Quote:
Originally posted by asw7576
Xray XRC chassis : 3.5mm thick

BMI chassis : 2.5 mm thick ( it said "direct replacement" )

Aargh.... I think I stick with XRC, more over I don't know the quality improvement over BMI graphite? Is it harder to scracth? I can tell for sure that original Xray graphite is harder to scratch than yokomo mr4tc sd.
The BMI is 3mm and the places for the bulkheads are milled down .5mm. Checked last night at the LHS and my BMI chassis feels stiffer and lighter than the XRC.

Last edited by NismoSkyline17; 11-29-2004 at 08:30 AM.
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Old 11-29-2004, 08:27 AM   #10493
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the XRC chassis is 3.5mm but milled down to 2.5mm (same as the old chassis) so all the bulkheads etc sit the same as before to keep all the suspension the same.
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Old 11-29-2004, 11:15 AM   #10494
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Quote:
Originally posted by NismoSkyline17
The RCScrewz stainless screw kit is awesome. It comes with all the screws on the car and I had just under half the box left when I was done replacing all the screws. You get more that $22 worth of screws. Great way add weight to your FK to bring it up to weight.
I have to agree. For the price, you can't beat the RCScrewz kit. The only thing I don't like about it, and this truly is the only thing, is that there are only 4 wheel screws in the kit. If they'd add 2 or 4 more to the kit, I'd have nothing to complain about.

Rob
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Old 11-29-2004, 12:03 PM   #10495
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Quote:
Originally posted by Rob Mincey
I have to agree. For the price, you can't beat the RCScrewz kit. The only thing I don't like about it, and this truly is the only thing, is that there are only 4 wheel screws in the kit. If they'd add 2 or 4 more to the kit, I'd have nothing to complain about.

Rob
Mine suprisingly came with 1 extra wheel screw, but I definately agree. Those are the ones people will more than likely loose.
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Old 11-29-2004, 12:35 PM   #10496
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Default unwanted drifting

I have a T1 FOC ... running on a small ozite carpet oval. Car tends to drift from side to side going down the straights .... can anyone tell me an easy fix or tell me where I should have settings to help?

Yeah, Im a rookie XRayer.

Thanks a lot guys.
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Old 11-29-2004, 12:42 PM   #10497
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if the car is difting from side to side with no input in the wheel, then your steering servo is not centering or you don't have enough torque in the servo or it could be your wheels are not true. It could also be the carpet.

but if you are saying that when you have the throttle pegged and it is dfiting side to side, you could have a tweeked chassis
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Old 11-29-2004, 04:16 PM   #10498
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i hope this answers any questions about my chassis kit.i use 3mm c/f that is quasi iso tropic(fibers layed at 0-90-45 degrees)for ultimate torsional strength.i bevel every edge of the chassis,top and bottom with a .010 45 degree angle and the battery slots are beveled .09x45 degrees to lower the cells and eliminate filing.i do not mill under the servo or electronics because it removes the insulative layer from the c/f when you do so.the core of c/f is extremely condutive and i do not want to have problems with causing glitches and i did not find any benefit of dropping the servo .5 mm(.020).i will do it if people ask but i do explain to them the consequences of doing so.i only remove what is necesary.the xrc chassis works good from what i hear from some very happy customers.i didnt need to use 3.5mm because i didnt use the same c/f they use.if i can offer any more info on my kit please feel free to call my shop or shoot me an email.

thanks,
jason
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Old 11-29-2004, 04:24 PM   #10499
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Quote:
Originally posted by protc3
i hope this answers any questions about my chassis kit.i use 3mm c/f that is quasi iso tropic(fibers layed at 0-90-45 degrees)for ultimate torsional strength.i bevel every edge of the chassis,top and bottom with a .010 45 degree angle and the battery slots are beveled .09x45 degrees to lower the cells and eliminate filing.i do not mill under the servo or electronics because it removes the insulative layer from the c/f when you do so.the core of c/f is extremely condutive and i do not want to have problems with causing glitches and i did not find any benefit of dropping the servo .5 mm(.020).i will do it if people ask but i do explain to them the consequences of doing so.i only remove what is necesary.the xrc chassis works good from what i hear from some very happy customers.i didnt need to use 3.5mm because i didnt use the same c/f they use.if i can offer any more info on my kit please feel free to call my shop or shoot me an email.

thanks,
jason
how much $$ ? w/shipping to zip-48331. and what colors do you have? i am hoping to buy a chassis from you in the future.

thanks
marshalv
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Old 11-29-2004, 05:50 PM   #10500
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the chassis kit is 79.99 and includes the chassis and upper brace.i also offer shock towers,battery straps(w/ xray engraved in them),and the bumper brace.i make them in gloss black,satin black,blue,titanium(gunmetal grey),and gold.shipping is a flat rate of $10.00 anywhere in the U.S.
i ship 3 day select via ups
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