SH Engines PT21XT3-P8 .21 On Road Engine

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SH Engines PT21XT3-P8 .21 On Road Engine
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Price: $169.99
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The SH Engines PT21XT3-P8 .21 On Road Engine is the result of years of refinement. Focusing on durability and reliability, this is an incredibly powerful .21 engine, at a price that is going to shake things up in the 1/8 scale nitro market. Package includes engine, glow plug, 8.5 and 9.0 venturis, head shim, collet, throttle rod end ball link and a full rubber cap set for the exhaust, intake and fuel nipple.

Cubic Capacity: 3.497cc 
Bore: 16.2 mm 
Stroke: 16.75mm 
R.P.M: 35,000rpm 
Weight: 325g 

This product was added to our catalog on June 18, 2019

Tuesday, Aug 3 2021 (11 months ago)
SH Engines PT21XT3-P8 .21 On Road Engine
I am not an owner of this engine but a friend of mine bought this engine and during break in his engine started to run funny. He took it apart and the con rod bushing was worn and the piston and head button were ruined. I’m pretty sure the way to prevent this is to add a head shim but it is a good idea to either have the shim there from factory or put in the description that a head shim is needed. I’m sure the engine is very good when shimmed and tuned well but the fact that happened is very unfortunate. Thankfully the engine isn’t crazy expensive.
Verified Owner
Friday, Dec 11 2020 (about a year ago)
SH Engines PT21XT3-P8 .21 On Road Engine
It has good top end but never could get the LSN right and the overall carb just never seemed to dial in (I'm not new to nitro). Even after proper break-in and a gallon of fuel the LSN needed to be set to almost 100% in but engine was still getting too much fuel on the low side (HSN was spot on). After much frustration bought a REDs, put it in the same car, same fuel, same fuel lines, same fuel tank and it runs like a champ, required very little tuning.
Verified Owner
Tuesday, May 5 2020 (about 2 years ago)
SH Engines PT21XT3-P8 .21 On Road Engine
SH engines are amazing for the amount of money. So far the engine runs great and is very strong. Cant wait to see the car go around a track.
Verified Owner
Saturday, Jul 27 2019 (about 2 years ago)
SH Engines PT21XT3-P8 .21 On Road Engine
Fast engine. Have not run it much so cannot say what the reliability is. Had one problem with the carb but it was fixed by a local hobby shop.