Engine Mods

Use an aftermarket control unit of some sort... it's the best route.

You don't need to drop the engine to do any of what you just mentioned. If you remove the tank and the radiator you can get to all of that stuff pretty easily.

I'm actually having my mechanic friend do it for me... Seeing as how I don't have a CCT tensioner.

Is it really that easy to access those items tho? He said he'd do it for me for free, but I'd have to drop the engine for him, for easier access. I'm a bit queasy when it comes to engine internals. Oil change and coolant flush, Throttle/Clutch cables, wiring harness I can handle. Engine reassembly... whoooo...

It is much easier to do with the motor out.

Well if you drop it and he does the work then I would say go ahead and drop it. Nate's right it is easier out of the bike but it doesn't have to be out of the bike to do it.

Well, I figure dropping the engine will also give me a good opportunity to clean all those nooks and crannies I haven't been able to get to.

I figure if he can put a custom turbo and nos kit on a 4banger, putting a couple pistons and cams in a vtwin should be cake.

I think you can remap it witha TEKA BOX w/o having a Power Comander. I was told as well that the Yoshi Box can remap the original ECU

Hmm... depending on how bad my HP is right now, I'll get a PCIII. Scheduled for a dyno run next Friday.

Maviryk said:

So, looks like I have the Aesthetics of the bike done (for now).

It's time to drop the engine, change oil, coolant, adjust TPS, adjust TB Sync, change plugs, check tappet clearance, BMC Filter

While we're in there I'm going to do a cam swap (buying a set of '02 intake cams), install Hayabusa Pistons and remove one layer of the head gasket.
BARF Cam Swap Guide, TWF Cam Markings

Parts List:
2 x '02 Intake Cams (front + rear)
2 x CCT Gaskets
2 x Head Gaskets
2 x Hayabusa Pistons
BMC Air Filter

Something tells me I'm going to remap the engine. Anyone here with experience with FI? I heard there was a way to remap the ECU w/o a PCIII. Is this correct (and does it "lose" the map if the battery is unplugged?) I'm currently looking for a Dyno shop to do before/after sheets.

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2 base gaskets, new rings for your Busa pistons, 2 exhaust gaskets, and hone your cylinders(new rings) and you should be good to go.

How much? My friend is a drag racer... toe sliders on the INSIDE of the boots. He has lots of stock parts that have not even been broken in.

SVXR650 said:

Would not you want new JE Hayabusa pistons...

13.5:1 compression...

I will go half on a set of 4...

Luis

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Why would you want those for your SV? You could get stock ones MUCH cheaper.

jgennaro said:

Why would you want those for your SV? You could get stock ones MUCH cheaper.

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Please tell me that question was a joke. much better compression, JE pistons are great the wont melt at least they havent on my last 2 builds B series turbos in civic coupes running 25lbs of boost.

DWS909 said:

Please tell me that question was a joke. much better compression, JE pistons are great the wont melt at least they havent on my last 2 builds B series turbos in civic coupes running 25lbs of boost.

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No....it wasn't a joke! Why would you want to increase your compression with a turbo? That doesn't make any sense. The idea is to drop your compression so you can run more boost.

I have JE turbo pistons(like the ones in the second pic) in the turbo bike now. I'll agree....they're better because they're stronger but they'll melt just as easy as stock ones if you run it too lean!

jgennaro said:

No....it wasn't a joke! Why would you want to increase your compression with a turbo? That doesn't make any sense. The idea is to drop your compression so you can run more boost.

I have JE turbo pistons(like the ones in the second pic) in the turbo bike now. I'll agree....they're better because they're stronger but they'll melt just as easy as stock ones if you run it too lean!

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if you run to lean with a turbo youll have to worry about other things way before the piston melts. As far as the pistons i didnt read anywhere in this post about maviryk turboing his bike it looks to me like he is trying to get as much HP as possible going NA so those high compression pistons look like a great addition. I run JE low compression pistons in my civics.

DWS909 said:

if you run to lean with a turbo youll have to worry about other things way before the piston melts. As far as the pistons i didnt read anywhere in this post about maviryk turboing his bike it looks to me like he is trying to get as much HP as possible going NA so those high compression pistons look like a great addition. I run JE low compression pistons in my civics.

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OK....my bad.....there was miscommunication on my part regarding the turbo thing. I thought you were referring to higher compression being better for turbos.

Now in reference to turbos and running lean.....the lean condition will eat whatever is the weakest point first. That could be the head, piston, cylinder, or whatever.

Lastly, as far as using JE pistons for the SV.....it's not needed. For one the JE piston costs big $. Another reason not to use JE pistons in the SV is the weight. The JE pistons weigh more than the stock Busa pistons and the wrist pin is heavier. If you're building a N/A SV you really don't want heavier pistons/wrist pins because that weight increase will have a negative effect on your total reciprocating mass and decrease HP. My opinion.

actually corkey bell says compression should not be lowered when going boost, lol yeah i remember those days.


those pistons will b heavier

Make sure you get proper piston/cylinder clearance and set ring end gap properly.
ac