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LRP ZR 28 Spec 4 Nitro Engine With Pullstart
Brand: LRP
Part No: SCH-LRP32803
Out Of Stock
Request Stock NotificationThe LRP ZR 28 Spec 4 Nitro Engine With Pullstart (SCH-LRP32803) delivers big-block .28 performance with refined drivability. Spec.4 updates enhance carburettor vernier adjustment and cooling via the Heavy-Duty CoolDownMax cylinder head, while a newly developed XTEC PowerCarb3 15S-2 carburettor with a 9 mm venturi improves idle stability, throttle response and overall adjustability. Despite its massive torque, the compact design allows it to serve as a direct replacement for many .21 installations.
Designed for tough off-road use, this engine combines an ultra-strong pullstart and reinforced XTEC T6 housing with improved thermal efficiency. It ships with an LRP Platinum/Iridium R5 glow plug to get you up and running.
Key Features
- Massive .28 big-block displacement for outstanding torque
- New CoolDownMax cylinder head for improved cooling efficiency
- XTEC PowerCarb3 15S-2 carburettor with 9.0 mm insert for maximum power and easy tuning
- Universal fit approach with compact dimensions
- 6 + 1 port layout
- FREE LRP Platinum/Iridium R5 glow plug included
- Standard burn room for easier tuning across conditions
- XTEC T6 reinforced engine housing for heavy-duty off-road use
- Extra-strong, specially reinforced con rod for .28 engines
- Ultra-strong pullstart designed for big-blocks
- Power Start capable (prepared for LRP Power Start)
- Explosive torque and fast response
Technical Data
- Cubic Capacity: .28 (4.57 ccm)
- Bore: 18.50 mm
- Stroke: 17.00 mm
- Power: 3.93 HP
- RPM: 33,900 RPM
- Number of Ports: 6 + 1
- Glow Plug: LRP Standard R5 (No. 35051)
- Carburettor: XTEC PowerCarb3 15S-2 with 9 mm venturi
- Weight: 420 g
- Class: 1/8 off-road buggies/truggies
Suggested Compatibility
- 1/8 off-road buggies and truggies
- Chassis using .21 engine mounts (compact drop-in approach)
Secured by Stripe
A completely new carburettor has been build-in for an even better adjustability especially when in at idle speed. The performance, especially when stationary, has been improved with this move. All in all, the ZR.28 Spec.4 offers more torque with better adjustability and improved responsiveness.
Otherwise being a giant, it is a true midget in its dimensions. Due to its compact construction the engine can be used as a direct replacement to the .21 engines. The ZR.28 Spec.4 fits into all common .21 engine mounts.
FEATURES- MASSIVE Big Block size - You cannot replace displacement with anything… but even more displacement!
- New CoolDownMax cylinder head - Improved cooling and higher efficiency through new cooling fin arrangement
- XTEC PowerCarb3 15S-2 carburettor - Flow optimised carburettor with 9.0mm insert for maximum power and easy adjustability at the same time
- Universal fit - Fits all major .21 engine mounts
- 6 + 1 Ports
- FREE PLUG - FREE LRP Platinum / Iridium R5 glow plug included
- Standard burn room - Guarantees easy adjustment of the engine in all conditions
- XTEC T6 engine housing - Especially reinforced heavy duty engine housing for toughest offroad action
- Massive con rod - Extra reinforced con rod. Specially adjusted for .28 engines
- Ultra strong pullstart - Pullstart specifically developed for big block engines
- Power Start capable - Prepared for the use of the LRP Power Start for starting the engine at the push of one button
- Torque you can barely handle
Key Info:
- Brand: LRP
- Part No: SCH-LRP32803
- Barcode: 5051294145415
- Displacement: 4.6cc (0.28ci)
- Starter: Pull Start
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Questions & Answers
Due dates if known are above the add to cart button
That will fit but it is the same size and power as the original engine.
Hi, not really smaller engines rev faster so the bigger engine is more torque but less RPM
This engine would fit that car. This would be a great tuned pipe to use NN.51135-021
Yes, that should go straight on to this engine.
This engine will be much too big for that car.
Yes that should fit in that car.
We do not do a roto start system for that engine.
Yes this would be OK in that car, you may need to raise the engine slightly to clear the bigger pull start that this engine has.
That should fit fine.
You would need to use the one from the old fly wheel.
Yes, this is a big block engine so should fit that car
Yes this would be good with that car
No, this is to big for that car. You would need FTX6149
Afraid I don't know to a specific spacer/different engine mount that would be taller - however I have seen similar issues in the past on various cars.
Perhaps you could fabricate a spacer from a small section of aluminium? It would just need two holes at the appropriate distance?
This would fit and work well in there
Any standard clutch nut would work - eg say HPI-101062
Yes you can flip the carb around easily
That does depend a little on what you're fitting it into? However pretty much any standard clutch should fit. Some nice options would be say TLR342014 or TLR9101 or REDMUQU0063
Yes that should fit fine
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