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Old 08-29-2019, 05:48 PM
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Default More goodies from Tillotson

So there was a dad at our track raising Cain because the boys have been running predators which are technically illegal, but these are stock harbor freight predators that I clearanced for racing. Theyíre running $1200 pro built motors, and I canít afford that, much less X2 so I did what seemed the most reasonable to me and ordered a pair of Tillotson 196Rís.
Iím thinking theyíll be wishing to have the predators back. These came with the JT-207-196R head, and the new and improved PK1B carbs. Iím waiting for a couple of PVL flywheels yo show up and Iíll hang them on the Dyno and see how they stack up against the predators.
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Old 08-29-2019, 06:16 PM
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Heh heh heh, you sure are spoiling yourself FHB.

They look good, I even like the shade of blue and I can't wait to see your test results. What's the lowdown on those carbs? Just some basic info.

Nuthin discreet about those cardboard boxes.
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Old 08-29-2019, 07:08 PM
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Good thing I live in a good neighborhood, lol. Those boxes would’ve gotten me robbed for sure in some of the places I’ve lived.
The thing with these engines is that Tillotson took the legal acceptable specs for NKA and AKRA racing engines and started manufacturing race engines. Not tiller motors that have been blueprinted, but straight up, right out of the factory race engines. There were people that didn’t like that Tillotson took the best specs from the carbs and started producing carbs that combined all of the good things about other legal carbs into one. In my opinion it’s the best bone stock legal carb there is available at the moment.
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Old 08-29-2019, 08:25 PM
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I’m still waiting for the 212r to come back.
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Old 08-29-2019, 10:57 PM
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I always mix those up.. was the 196R the boxStock or the stage2 ?
Since IIRC one of the Tillotson 196es clearly outperforms the tillotson 212H (on paper at least)

Anyways.. I think a true (196 cc) clone can be as menacing as a 212 sized one, throwing the smae kind of money at it the teaspoon of additional combustion volume doesn't cause a noteworthy difference.

Anywhoo.. you have some great engines there (as far as I've been told) and I'm fairly certain with a tiny bit of tweaking around
you get quite a grinny face (or two) for your money after all
(maybe the 1200 dollar professionally build one was better, but grin/dollar )

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Old 08-29-2019, 11:12 PM
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Tillotson has a 212 race engine, like the 196r. It was different than the blue 212 Tillotson. It dissapeared recently. After talking with GoPowersports evidently it did not live up to the power claims and GOS and Tillotson are working together to re-release the race 212 when Tillotson fixes whatever issues GPS didn’t like.
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Old 08-30-2019, 12:39 AM
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I just looked and was surprised to find out that not all those Tillotson engines come with Flywheels. I was previously under the impression that they came with Flywheels rated for 10k rpm.
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Old 08-30-2019, 08:11 AM
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The 212’s come with flywheels, these didn’t.
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Old 08-31-2019, 12:21 PM
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Putting timing marks on the flywheel for quick adjustment on the dyno. I should know what these are all about by the end of the day.
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Old 08-31-2019, 04:43 PM
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First pull is in the books. Straight out of the box with ignition timing at 28 degrees I made six pulls and got hetreeen 16.9-17.4 ft/lbs every time. For reference a predator with a cl-4 cam, .009 head gasket, and 32 degrees of ignition timing read a max of 14.3 . These seem to be stout motors.
I’m going to let it cool off and advance the timing to 32 and see what we get.
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Old 08-31-2019, 06:24 PM
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Iíve pretty well settled on 32 degrees. I hooked up the wideband O2 sensor and got mid 11ís to mid 12ís under full throttle and got a consistent 17.2-17.7 lb/ft.
Then my dyno got hot and spewed oil all over me. Iíll see if it can do a stock predator tomorrow.
All in all Iím impressed. The jetting is correct for a K&N style air filter and header right out of the box, and theyíre obviously plenty powerful. I got mine on sale for $130, $65 for a PVL flywheel, and a few bucks for a 4 degree advanced timing key and youíd have exactly what I do. I think this is a much better option than a predator as you donít have to buy a cam, rejet, or any of the other things that generally come with hopping a predator up. Another benefit is that there is no governer to remover.
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Old 08-31-2019, 06:58 PM
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Owwww....
Hope ya feel better soon!
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Old 08-31-2019, 07:22 PM
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Thanks, but it didn’t hurt me. It was hot enough to be uncomfortable, but not hot enough to harm me.
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Old 08-31-2019, 07:29 PM
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Ahh, from the picture it looked like your hand had swelled up.
Glad you're Ok!
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Old 08-31-2019, 10:33 PM
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I’ll take the plunge if I can find a $130 deal like you. Any leads? Also what about the rod? Good for more rpms? Stock 10.8 springs, 10.8 cheater springs, or heavier springs?
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Old 08-31-2019, 10:52 PM
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Google EC Tillotson. They have them on sale right now for $130. I haven’t opened one up, but I believe it’s a +.010 cast rod and 10.8 springs. They’re legal for stock class racing so they can’t have heavier valve springs or a billet rod.
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Old 08-31-2019, 11:07 PM
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So the cam in these has “stock” lift and duration? Same lift and duration as the CL series?
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Old 09-01-2019, 12:13 AM
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Good info. I know NR Racing has some 10.8 springs that hold pressure better than the factory springs, while still being legal. That might be a good option. What kind of rpm are the racers turning with these stock class engines?
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Old 09-01-2019, 03:41 PM
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A lot of guys turn 6500ish. I’ll let you know where we end up with these.

---------- Post added at 03:41 PM ---------- Previous post was at 03:40 PM ----------

Quote:
Originally Posted by bob58o View Post
So the cam in these has ďstockĒ lift and duration? Same lift and duration as the CL series?
Legal for NKA and AKRA while better than the cams that come in clones and predators stock. I havenít checked lift or duration, but I havenít ruled out doing it either.
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