jman37

iTrader: (5)

Im lookin to purchase a OS SPEED TZspec 1 engine. Just wonderin if anyone knew anything about this one? I assume its the predecessor to the spec 2 os engine. Only has about a gallon on it.

anyone have one, or seen one run?

thanks..

SasonRC

I have the spec II and my buddy has the spec I

Mine is a missile. You have to tune them well. His is super decent and it purs like a kitty. The key in these engines is to make sure you update the connecting rod after every two gallons to ensure you don't blow up the engine.

Also get it tuned right and match it to a good pipe. Like anything else, the pipe is going to help the engine show off its power. go with the OS one piece 1040 or a Novarossi 2601. Also use only OS glow plugs. They match the head better and avoids having air leaks.

If your race track is huge, then you might want to get soemthing else, but it will cost you lots of $$$.

These engines will do the job, but the driving is up to you.

jman37

iTrader: (5)

I purchased it. It also came with a skyline pipe, I think it will do fine with this pipe.

The track is 200x90.. not that big, I think it will be fine.

CraigM

iTrader: (34)

If it's the magnesium head (red writing) order the aluminium one from the spec II. The magnesium one causes the tune to be inconsistent. Skyline pipe should be fine, when it gets worn go for the OS 1050 (1040 has been discontinued). The mugen pipe (cant think of the number) also matches the spec I very well but not the spec II which is revvier

musti72

mugen is 2501

jman37

iTrader: (5)

Thanks, Will do. Do you know, off-hand, if the aluminum head for the spec II is a straight bolt on, or are there some mods needed..

Thanks again guys, the insight is invaluable to this nooby..

Jon

Rick Vessell

iTrader: (10)

Jman,

No mods needed. You will need regular cap head screws since the mag. head uses washer head cap screws and they won't fit into the alum. head.

Socko