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2019 Protek Samurai SO3 & R03 Engines

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2019 Protek Samurai SO3 & R03 Engines

Old 06-06-2019, 11:33 PM
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Default 2019 Protek Samurai SO3 & R03 Engines

Whats up everyone, Protek has a new pair of Samurai engines!





Samurai S03 and R03. They look to be OS 2103-based engines.

S03 for buggy/mileage, R03 for,truggy/power. Only difference is the carb. Both are 3-port engines.

Optional LCG head available.




Specifications for S03 and R03
Displacement : 3.49cc / 0.213 cu.in.
Bore : 16.27mm/0.641in.
Stroke : 16.80mm/0.661in.
Output: 2.68ps/2.64hp/34,000r.p.m
practical rpm range: 4,000-42,000 r.p.m.
weight : 352g/12.42oz.

ill be trying one out very soon with feedback posted here. OS 2100 pipe will be paired with the S03 for my testing.
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Old 06-07-2019, 10:58 AM
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Old 06-07-2019, 10:47 PM
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Old 06-09-2019, 05:29 AM
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Spec 2 in the new case?
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Old 06-09-2019, 07:38 AM
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399




Lol and the low pro is 69.99 lol stop it your killing me lolololol
Oh don't forget about tax for some of us
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Last edited by Goof; 06-12-2019 at 09:07 AM.
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Old 06-11-2019, 07:13 AM
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Originally Posted by HaulinBass View Post
Spec 2 in the new case?
no, more like 2103 wth a Samurai-labeled head. All new carb, o-ring head button, different timing profiles.
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Old 06-11-2019, 12:00 PM
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Originally Posted by stephen_bess View Post


no, more like 2103 wth a Samurai-labeled head. All new carb, o-ring head button, different timing profiles.
So this will have a different timing/feel than the OS B2103 type S? As you mentioned, it sounds like they are all 3 ports. Unlike the Type R OS which is 5 port.
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Old 06-11-2019, 11:16 PM
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Originally Posted by skrichter View Post
So this will have a different timing/feel than the OS B2103 type S? As you mentioned, it sounds like they are all 3 ports. Unlike the Type R OS which is 5 port.
Sorry, I meant different timing profile than the Spec II. I haven't timed the engine out to compare it against s B2103 S03, but the S03 Protek I just broke in yesterday on my EBIS and ran tonight for club racing at Hot Rods is really smooth and feels more powerful than the B2101/Ty2 with a great mid-range pull. First outing, so it didn't get great mileage but I really like the powerband for buggy. 6.5mm carb insert, OS 2100 pipe set, 30% Flashpoint w/Klotz Techniplate/Benol added. It was over 100F during quals and engine ran really well.
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Old 06-12-2019, 08:34 AM
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Not great fuel mileage like what
Lol frist outing I guess I have to keep that in mind

Last edited by Goof; 06-12-2019 at 12:59 PM.
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Old 06-13-2019, 10:36 AM
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Not that I’m being a jerk, but in the “Protek Samurai is Discontinued” thread, when I told everyone that I was testing a new version of the Samurai engine for AMain a few months ago and everyone said I was lying and full of BS, I hope the release of the new version will help silence all those keyboard “experts”. Sometimes people should grow up and believe what you read, instead of criticizing someone’s post.
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Old 06-23-2019, 11:39 PM
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Originally Posted by Goof View Post
Not great fuel mileage like what
Lol frist outing I guess I have to keep that in mind
second and third outings it got expected strong mileage. First outing I think I wasn't filled up during my pit stop. 5min qual with 1/3-tank and pitting 20min mains at 7:30 with over a min of fuel to spare in tank.
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Old 06-24-2019, 08:59 AM
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Originally Posted by stephen_bess View Post


second and third outings it got expected strong mileage. First outing I think I wasn't filled up during my pit stop. 5min qual with 1/3-tank and pitting 20min mains at 7:30 with over a min of fuel to spare in tank.
So a 8:30 min motor?
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Old 06-24-2019, 04:22 PM
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730 830 isn't that low for 400plus?
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Old 06-25-2019, 05:16 PM
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Does anyone know if the low profile head will fit on the V2 Samurai?
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Old 06-27-2019, 07:35 PM
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Originally Posted by Goof View Post
730 830 isn't that low for 400plus?
Who honestly risks going 10 minutes routinely....
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