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Is the LRP Spec 3 engine at Tower an 8 port?

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Is the LRP Spec 3 engine at Tower an 8 port?

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Old 10-17-2006, 04:38 PM
  #1  
BigGrump
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Default Is the LRP Spec 3 engine at Tower an 8 port?

I almost placed an order at Tower Hobbies for the LRP Z.28R Spec 3 w/Pull Start. when I noticed they described it as a six port engine.

Power Output: 3.81 PS depending on fuel type, manifold and tubing
Useable RPM Range: 2,000-33,0000
Engine Size: .28 cu in (4.58cc)
Bore: 0.73" (18.5mm)
Stroke: 0.63" (17.0mm)
Number of Ports: 6+1 (6 intake, 1 exhaust)
Weight: 15.9 oz (450g)
Distance Between Mounting Holes Same Side: 0.83" (21.2mm)
Distance Between Mounting Holes Opposite Side: 1.45" (37mm)
Height from Bottom of Crankcase/Top of Cylinder Head: 4.5" (115mm)
Height from Bottom Mounting Ears/Top of Cylinder Head: 3.7" (93.5mm)
Width at Mounting Ears: 1.7" (43.5mm)
Length from Back of Pull Starter to End of Crankshaft: 4.5" (115mm)
Length from Center of Crankcase to End of Crankshaft: 3" (76mm)
Does anyone know if this engine http://www2.towerhobbies.com/cgi-bin...&I=LXKYU8&P=ML is the actual 8 port LRP that everyone raves about, or is it actually the 6 port as described. I have a feeling it may actually be the Spec 2 engine for sale, or they just used the description of the Spec 2, or maybe the Spec 3 is actually a six port engine, and not an 8 port one that I have read about.

Can anyone give me any info that is "for sure" about this "Tower" engine?


Thanks in advance


Dennis
Old 10-18-2006, 03:40 PM
  #2  
Philster
 
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Default RE: Is the LRP Spec 3 engine at Tower an 8 port?

Here is the sleeve for it. Looks like no more than 6+1 to me:


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Old 10-19-2006, 08:01 AM
  #3  
supertib
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Default RE: Is the LRP Spec 3 engine at Tower an 8 port?

the LRP 28 spec 3 is a 8 port....the LRP 28 Spec 2 is a 6 port
Old 10-19-2006, 07:21 PM
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Philster
 
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Default RE: Is the LRP Spec 3 engine at Tower an 8 port?

Well, that is nice to know...just don't rebuild the Spec 3, because if you order spec 3 parts, you are gonna get the 5 or 6 port sleeve from Tower. Guess Spec 3 parts aren't out yet.

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