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Old 01-26-2011, 02:02 PM   #10276
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Diff vs. spool for TC4 in VTA???

I've considered making a slipper spool for my VTA TC4 to see if it improves my lap times. Currently I'm running a front diff and I really like the way it allows me to drive hard into corners. However, I feel that I'm losing a bit of acceleration coming out of the corner.

Right now I feel that I'm making a bit of a compromise. Since the diff allows me to drive a little more aggresively into a corner, I feel like I can keep the pressure on the car/driver in front of me and force them into a mistake. However if I cut the corner too tight, the front diffs out a bit and I watch a car with a spool pull away. This negates the advantage I gained going into the corner.

Regardless of which way I end up going, I'm having more fun in VTA this season as I feel all the cars have become more equal in speed with current rules. I am enjoying the actual racing on the track. I have even had to consider strategy of whether to pass for position, or stay behind and pressure the car in front into a mistake. Rarely can I say I raced an r/c car hard AND had fun. VTA is that class for me.
Hey Brian, A solid axle or slipper spool is the way to go. Personally, I was much faster with a solid axle in the front of my TC3/TC4. I never found the diff action to be fast enough in rubber tire for a front diff to work to my liking. Also virtually every setup sheet you see for rubber tire racing shows team guys using a solid axle in the front. The problem with tight diffs are longevity, it's hard on the balls and thrust assembly and they go to junk in no time. As far as durability, I ran the solid axle in my tc4 without any problems. In fact the only thing I ever broke on that car was a steering rack.
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Old 01-26-2011, 03:06 PM   #10277
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on the steering racks ,Ive seen guys use the alum ones with good results
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Old 01-26-2011, 10:13 PM   #10278
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My sons and I run three separate cars in VTA. A TC4, Academy STR4 Pro II, and a Corally Assassin. All cars have one ways. The TC4 is quicker entering corners and especially fast in tight "S" curves. I don't think that putting a one way in your car will hurt you at all. The only time I have noticed that a one way is a problem is if I need to use the breaks. As long as you don't have drag break dialed in, the one way should not effect you entrance speed at all and the benefits of having it when exiting is worth it.
i thought the oneway was banned from vta racing...or is it just some races??
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Old 01-26-2011, 10:40 PM   #10279
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i need some help with the 25.5 motor...(ballistic)
90 x 40 track..what would you gear it...4.0??
& do you mess with the timing??
some ppl i seen in vta have their 25.5 motor rolling!!...i mean it look really fast
just wanted to know whats da secret to make them fast
thanks!!
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Old 01-26-2011, 11:04 PM   #10280
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start @4.0 don't just crank the timing. Keep adding notches of timing, and watch lap times. My car got really fast with 1 notch of timing past "N", vs. more.
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Old 01-26-2011, 11:14 PM   #10281
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start @4.0 don't just crank the timing. Keep adding notches of timing, and watch lap times. My car got really fast with 1 notch of timing past "N", vs. more.
thanks i will try that this weekend[email protected] the moment i got it gear @ 4.4..(tc4) with the timing up to the 45mark...temps was like 160-165
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Old 01-27-2011, 09:28 AM   #10282
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i need some help with the 25.5 motor...(ballistic)
90 x 40 track..what would you gear it...4.0??
& do you mess with the timing??
some ppl i seen in vta have their 25.5 motor rolling!!...i mean it look really fast
just wanted to know whats da secret to make them fast
thanks!!
no more speed secrets for you!!, unless your blocking batman for me in Indy
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Old 01-27-2011, 12:56 PM   #10283
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hey rob - so, what's the date for the 2011 USVTA nationals??

need to see if its possible to make a road trip this year
hey rob - any reponse?

trying to figure out if its a doable thing this year
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Old 01-27-2011, 01:10 PM   #10284
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Is there a USVTA Nationals coming up? When and where? Is it on a web site anywhere?

THANKS! - Dale
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Old 01-27-2011, 01:15 PM   #10285
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no more speed secrets for you!!, unless your blocking batman for me in Indy
i need all i can get...i heard the vta in indy will be competitve & im tryna be in the mix...so the speed secret keep'em coming!!...
p.s im going to indy sunday to see what i can do
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Old 01-27-2011, 01:22 PM   #10286
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Is there a USVTA Nationals coming up? When and where? Is it on a web site anywhere?

THANKS! - Dale
do you have something new coming out for the VTA racers??
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Old 01-27-2011, 01:23 PM   #10287
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Is there a USVTA Nationals coming up? When and where? Is it on a web site anywhere?

THANKS! - Dale
Dale...I think this is being worked out.....From what was said in the thread it looks like Early April....maybe at The Track @ Harbor Hobbies in Winthrop Harbor, IL? Its about an hour straight north of Chicago.
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Old 01-27-2011, 02:04 PM   #10288
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We're trying to work this out, but early April is most likely. Hopefully more info soon.
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Old 01-27-2011, 02:30 PM   #10289
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k_bojar:

YUP! Feb 15th. Hope ya like it.

Dale - Protoform
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U.S. Vintage Trans-Am Racing-throw-thing.jpg  
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Old 01-27-2011, 02:36 PM   #10290
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k_bojar:

YUP! Feb 15th. Hope ya like it.

Dale - Protoform
I want (15) , send em to ken @ dragrace concepts, he owes me
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