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Best header (manifold) for OS 18 CV-RX engine

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Old 04-14-2017, 05:48 AM
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Tm99
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Default Best header (manifold) for OS 18 CV-RX engine

HI guys,
New here and wondering if you can help me with choosing the correct manifold (header) to fit to my new OS 18 CV-RX engine (with rear exit exhaust port). I would like to run my exhaust along the side of the chassis so looking for a manifold with a 180 degree bend.
Out here in the UK I haven't been able to find much gear (and even less info - may be I'm looking in the wrong places?).
Anyway would greatly appreciate your advice on which is the best header/manifold for this engine and if I should be thinking about matching any particular exhaust to it?
I do not race so not worried about contravening any race rules, but simply looking for a good manifold/exhaust for this engine which will give a nice strong power band to play with.
Thanks and Happy Easter!
TM
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Old 04-14-2017, 05:58 AM
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1QwkSport2.5r
 
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What truck is the engine in? Post a pic?
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Old 04-14-2017, 11:44 AM
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Tm99
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As requested here are some photos. I haven't yet fitted the engine but I think the etup is clear. Need a good manifold and exhaust that will give me the strongest power band spread.
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Old 04-14-2017, 11:45 AM
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One more.
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Old 04-14-2017, 03:10 PM
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I know exactly which header you need, but can only find them listed for .15's. Even if the holes line up, you may have to do a little Dremel work. Do you have a decent hobby shop nearby? May have to see what they have available. Make something fit. I've had to do that several times.

You're going to like that engine. Break it in right and it will be some fun. Have the same one stuffed into an HPI MT Racer.

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Old 04-15-2017, 12:56 AM
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Thanks RowdyRay....i had to do exactly that to my older HPI 18 engine which I am replacing. But I don't want to take the manifold off that one as I can use the whole setup in a nother car (that way each of my children will have one). It was a bit of trouble to make it fit so i'd rather buy a new manifold (the right one) to fit on this OS engine (which everyone is telling me is an absolute rocket!
Isn't there a matched manifold by OS? OS suggest a manifold in their engine manual but I can't find it anywhere.
I don't mind doing a bit of DIY to fit it - so any 15 size manifold will fit? Can you suggest one in particular? Thanks for getting back.
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Old 04-17-2017, 02:07 PM
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Well, I got lucky that the exhaust was to the outside on the HPI. I can't find anything on Google specific to this engine. The ideal shape you need is listed for .12 and .15's. Not sure if it will fit or work. I'm just going to throw a bunch of info at you. You can decide what to do.

This is the ideal "U" shape needed. Has a 30 degree drop, clears the pull start and levels off. This is for a Rustler Sport which had a .15 in it. In the Specs it says the mounting holes measure .98" or 25mm.

http://www3.towerhobbies.com/cgi-bin...FUi1wAod_kgPsQ

But, I did find this while searching. The HPI 3.0 is an .18. I know this will fit and work, but it doesn't have the drop. Your muffler may ride high. Hope that helps.

Firestorm O.S. Engine Swap

http://www3.towerhobbies.com/cgi-bin...FYK4wAody7EPzw
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