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Old 10-22-2012, 08:49 PM   #1
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Default hpi super nitro rs4 engine size?

I recived a hpi super nitro rs4 onroad car in on trade. I can not find anything on the motor for a size. The only thig is says is picco xp in the head and has a P stamped in the block. I am looking to repace pull start for rotostart. The starting rod which goes into the motor has a little hex head on it. Anyone know what size engine? Thanks

Last edited by travis1; 10-23-2012 at 03:40 PM. Reason: photos
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Old 10-23-2012, 02:29 AM   #2
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Normally it has a smallblock engine. Probably it is a .15 engine, a number like 12, 15 or 21 should be mentioned on the crankcase.
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Old 10-23-2012, 03:46 AM   #3
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sorry don't have any idea...but i think will get it from this thread
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Old 10-23-2012, 06:25 AM   #4
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I know it most engines have the numbers on them but this one only has a P stamped in it. Any other thoughts
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Old 10-23-2012, 07:47 AM   #5
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On both sides?

As I mentione is should be a .15 if it is normally mounted without modifications.
Has it a side or a rear exhaust?
You can messure the bore/stroke to be sure.

But the engine is already some years old, If you want to mount a rotostarter I think it is wise to go to a LHS and try some.
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Old 10-23-2012, 08:28 AM   #6
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It has the P stamped on the front side of the engine and the exhaust port coming out the back of engine. The starter shaft has a small hex head on it instead of a one way bearing if that helps any
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Old 10-23-2012, 11:22 AM   #7
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This is what we call a rear exhaust:
http://images.rcuniverse.com/forum/u...93/Qo40905.jpg

And this a side exhaust
https://www.ssl-stormerhobbies.com/pics/pek6031_2.jpg

Regarding your text you have a side exhaust and with Picco you have a smallblock which is probably a .15.
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