Engine for STR
07-09-2006, 01:37 PM
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Engine for STR
Hey I know this has probably been asked before but, I have a new rossi black magic .21 that I had as a backup for my 1/8th scale buggy and am considering a st-r. Would this motor be okay for it? or should I go with a larger displacement or a .21 with a different torque/rpm curve?
thank you
125R21 Black Magic
Hp 2,85
RPM 37.000
Bore (mm) 16,44
Stroke (mm) 16,48
Ports 6
Crankshaft & Type Ø 14 SG
Glow Plug Standard
thank you
125R21 Black Magic
Hp 2,85
RPM 37.000
Bore (mm) 16,44
Stroke (mm) 16,48
Ports 6
Crankshaft & Type Ø 14 SG
Glow Plug Standard
07-09-2006, 01:42 PM
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RE: Engine for STR
first off those black magics are like bats outta hell, and just because its a truggy doesnt mean you need a big engine, someone told me that the ST-R's dont like big blocks and their geared for .21s.
id say that that black magic is perfect.
id say that that black magic is perfect.
07-09-2006, 01:58 PM
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RE: Engine for STR
That should be fine! ST-R's really seem to be geared towards .21's. I run a Rossi P5X in mine with a MSR1005 pipe and a werks conical header and it rips! You can't go wrong with any high end .21 in the ST-R. I've seen guys show up with modded novarossi .28's and make complete fools of themselves with all of their absolutely unessicary overkill power! And for those who can control it, they are making pit stops for fuel every 2 laps!
07-09-2006, 06:44 PM
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RE: Engine for STR
ORIGINAL: TGreg24
first off those black magics are like bats outta hell, and just because its a truggy doesnt mean you need a big engine, someone told me [that the ST-R's dont like big blocks and their geared for .21s.id say that that black magic is perfect.
first off those black magics are like bats outta hell, and just because its a truggy doesnt mean you need a big engine, someone told me [that the ST-R's dont like big blocks and their geared for .21s.id say that that black magic is perfect.
07-09-2006, 08:15 PM
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RE: Engine for STR
One more question which header and pipe do you guys rec for it. The magic is suppossed to be high torque anyways so would you run an 086 to get more high rpms or what?
Thanks in advance
Thanks in advance
07-09-2006, 08:37 PM
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RE: Engine for STR
^^ I'd go with the MSR1005 pipe and the werks conical header of your choice. Short length for more top end, medium length for an all around gain, or long length for more low end.
07-12-2006, 04:32 PM
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RE: Engine for STR
Go with a werks 053 conical setup for pipe or a AXErossi adjustable.With the werks you will have to bend the header slightly but its all golden after that.
