Head Porting Dilemma!

[Troy]

what he said   I had my head ported and it did good, then I went to a Racer's Edge head and it's a whole new animal, it performs better everywhere and the top end is very nice.

[Buck]

thanks for the input guys. I will definitely keep it all in mind when it comes down to biting the bullet. 

[Troy]

I'd say you really can't lose by going with Bo's head now, it's a great performer for cheap.  If you decide down the road you want more then you can go cnc and bigger valves.  I don't really regret getting a cheap port job first, it did great at the time and I was happy.  And I was just as happy when I upgraded to a cnc.  Yeah you are spending money twice but I've been doing that on everything so far, as soon as I'd buy what was the best, something better comes along and eventually I upgraded, that's the game we are all playing.

[Peelz]

I'd say you really can't lose by going with Bo's head now, it's a great performer for cheap.  If you decide down the road you want more then you can go cnc and bigger valves.  I don't really regret getting a cheap port job first, it did great at the time and I was happy.  And I was just as happy when I upgraded to a cnc.  Yeah you are spending money twice but I've been doing that on everything so far, as soon as I'd buy what was the best, something better comes along and eventually I upgraded, that's the game we are all playing.

Well Said!

[Buck]

I'd say you really can't lose by going with Bo's head now, it's a great performer for cheap.  If you decide down the road you want more then you can go cnc and bigger valves.  I don't really regret getting a cheap port job first, it did great at the time and I was happy.  And I was just as happy when I upgraded to a cnc.  Yeah you are spending money twice but I've been doing that on everything so far, as soon as I'd buy what was the best, something better comes along and eventually I upgraded, that's the game we are all playing.

Bos porting it will be soon, but if I decide to go with a CNC it will probably wait until tax return time.

[perhamite]

What are the costs for the different port jobs? Also does anyone have the dyno charts to show the differences?

[Buck]

What are the costs for the different port jobs? Also does anyone have the dyno charts to show the differences?

Bo is running a special right now on his porting for $250 until the end of the year (great deal) and a new CNC head is gonna cost around $500 plus cost of valves, and springs if u get better springs, that will up the price real quick to around $800. But Bo's porting uses stock valves so you pay $250 then throw it back on the bike. But the CNC heads are putting some serious power to the wheels.

[Kenny]

What are the costs for the different port jobs? Also does anyone have the dyno charts to show the differences?

Bo has a good head that will run $250. A CNC head with valves, which are required, will run $640 without springs. There is a big disparity in price and the performance between them. This isn't really an apples-to-apples comparison. The thing that really throws this out of whack is that all CNC heads are not created equal, so I can only speak for the heads that I sell.

As far as I know, I am the only one to have a dyno test published that is a head change only. This head was tested on the same dyno, same day without being unstrapped from the dyno. Even though this is a big engine, the cam and intake were a big restriction for the bigger head. The ported head that was on it was already a very good performing head.



As you can see, on an 869 there is a 5.75 hp gain at peak power. With a larger intake, there was a 15hp gain at 8200 RPM. With a larger cam and TB, or if the hand ported head had been stock valved, the differences would have been even greater. We will have a head only test next week on a stock bore stroke engine that is equipped with a Hotcam 3, +3 TB, 11:1 piston, and duals. Then another with drag pipes, KDS "RJ" cam, 12.5:1, +3 TB, ignition, and FCI intake. Both will be compared against the stock head.

[Peelz]

 

wow. I worried about the difference between 42 and 45 hp when considering my lil' mods. 

Hats off to ya' bro!

[Buck]

there may be another contender in the CNC head game soon as well. I may be looing into that as well