Kent cams and Busa pistons.

I have managed to get hold of some kent cams and busa pistons for a reasonable price, the cams are already fitted to stock SV sprockets and I'd like to also remove a layer from the head gasket... Unfortunately she still has stock headers and just a slip on at the mo. I have been on the hunt for system, but not much luck so far.

I'm hoping this will gain a bit of HP, without her getting the 'ump and spitting bits all round the place.

A dyno run would be nice afterwards, but would it be safe to run after the mods for a short while?

[jambo]

Fit the cams, you've got them, it'd be rude not to.
As for the thinner head gasket, I think generally people tend to skim the head instead, but either way I'd expect no real improvement without advancing the ignition.
You'd want to do this at the same time as fitting the alternate pistons which would require a very light rebore I believe.

All in all the cams would probably make the most difference, and are the easiest to do

Jambo

dont think the busa pistons will add any hp,although they are forged pistons and are stronger and will take more abuse then your sv will ever give them

[squirrel_hunter]

I ran 'Busa pistons and a cam swap for a bit before the crank grenaded, unrelated to the mods I'd say.

For the pistons its a 0.0002 inch over bore from what I remember but don't quote me on that as I can't find the mesurement. I had Piston Broke Engineering, Bristol (0117) 9412300 do the work for me, Steve will know what to do. You will need new SV rings though.

The head gasket mod is something I didn't do that time, will do the next. Basically take the middle metal bit out from the gasket.

As for HP, I didn't do a before and after dyno run. I will next time. But my bum dyno dectected a nice little increase. Can't say if it was the cams or the pistons or both. Either way do it.

Out of interest which Kent cams do you have and what model SV is it?

Thanks for the replies.

It's a K3, and SUZ43 cams. Jus in the process of stripping it all down now. Hoping to get it all back together by next week. Then off to he dyno. I'll put up a copy of the results. Although I don't have a direct 'before' comparison, it was making 68hp on the bemsee dyno.

If the cams are for the FI model of engine I might be interested in them, I currently have the carb model and I know that those will drop straight in, let me know if you want to sell them.

Hi Mitch,

Sorry mate but they are already spoken for...

Originally Posted by lawson17

Hi Mitch,

Sorry mate but they are already spoken for...

Ah, no worries, I will look forward to seeing what the cams are like as I know there isn't a huge amount of headroom for extra power before the crank gives up lol

[yorkie_chris]

Originally Posted by jambo

Fit the cams, you've got them, it'd be rude not to.
As for the thinner head gasket, I think generally people tend to skim the head instead, but either way I'd expect no real improvement without advancing the ignition.
You'd want to do this at the same time as fitting the alternate pistons which would require a very light rebore I believe.

All in all the cams would probably make the most difference, and are the easiest to do

Jambo

Curious to know why you think ignition advance would help?

I slotted my pickup and noticed no difference with couple of degrees. If you did both increase comp and more advance you would increase chance of knock.

It might be worth to check piston to valve clearance before you start reducing head height with these more aggressive cams.

Taking middle layer from gasket is fine way to increase comp, think it is about 15 thou thick from memory but it's been a while.

Originally Posted by squirrel_hunter

I ran 'Busa pistons and a cam swap for a bit before the crank grenaded, unrelated to the mods I'd say.

For the pistons its a 0.0002 inch over bore from what I remember but don't quote me on that as I can't find the mesurement. I had Piston Broke Engineering, Bristol (0117) 9412300 do the work for me, Steve will know what to do. You will need new SV rings though.

The head gasket mod is something I didn't do that time, will do the next. Basically take the middle metal bit out from the gasket.

As for HP, I didn't do a before and after dyno run. I will next time. But my bum dyno dectected a nice little increase. Can't say if it was the cams or the pistons or both. Either way do it.

Out of interest which Kent cams do you have and what model SV is it?

2 tenths? You sure it is 2 tenths not 2 thou?

[jambo]

Originally Posted by yorkie_chris

Curious to know why you think ignition advance would help?

I suppose mostly when I've seen people go down this route they've done one, other or often both. Both modifications do increase the chance of knock, but I'm not sure how far you can go with UK 95 RON fuel and still be happy without reaching for the super unleaded.

Jambo