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Old 12-16-2019, 08:35 PM
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Default Predator 301

Well this is my third question about an engine swap for the Streaker. The first was about a briggs 8hp (may or may not be happening, I haven't heard anything from my uncle since thanksgiving). The second was about a tecumseh 11hp, that would cost more than a predator 301 if it didn't have the correct crank, and would be a 5-6 hour round trip. Now I have some questions about the predator 301.

A, I know that you can swap a gx160/200 head onto a 212, but can a gx240/270 head be swapped onto a predator 301? And would I see a gain in compression and torque? The only aftermarket internals are for the honda and hemi, not the non hemi, and I'm a fan of the parallel valve train.

B, About how much of a torque gain would I get with a performance filter, and a quad style exhaust? I still want it to be quiet ish, and have a spark arrestor. And I think it would sound pretty cool.

C, Will a 30 series with a 1" bore driver hold up to the torque off the engine with these mods? It is one of the tav kits with the backplate.

D, Would flex pipe create an exhaust leak if I run it between the exhaust flange and the muffler?

And E, Should I retard the timing a few degrees for some more low end torque? The engine will stay governed.

The kart is heavy, and the predator 212 is straining, even with the 7" driven and 6.6:1 gearing. And it's one of the streakers with the diff, so sprocket swaps aren't easy. I think the kart would benefit from an engine with more torque.

And I know, I've been full of questions lately, please just bear with me.
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Old 12-17-2019, 08:40 AM
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For the ignition timing question, look at this thread, where I asked the same question. It pretty much sums up all of the forum's opinions: http://www.diygokarts.com/vb/showthread.php?t=42098
I still have yet to test it, my flywheel is still stuck, so I can't install an offset key yet.

Otherwise I can't really help. If I try I know I'll get blasted for "not knowing what I'm talking about".
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Old 12-17-2019, 10:23 AM
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Thanks for that thread. I'll leave the timing stock, since the tav has a 2300 rpm engagement if my memory is right (it has the stock springs and weights).
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Old 12-17-2019, 10:45 AM
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I believe they engage around 2200 RPM stock.....
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Old 12-17-2019, 01:15 PM
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Yeah, it engages somewhere around there, just can't remember the exact number at the moment. Anyone have some advice on mods for torque? I'm looking for something that can move a big kart like mine, not a high revving screamer (I have a raptor 660 for that).
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