i looked in search but i couldnt find anything so here it goes....

i found a shop that will sell me the integra type R exahust cam for under $200 .
my question is, is there any disadvantages to buying a regrinded cam, or should i spend the extra $50 for a new one? TIA

 

Pay the extra.
I considered them myself but from all reports, regrinds are crap.

 

Why did you say regrinds are crap? they just regrinds the stock cams the strength remains Honda standard. No offence, cuz i'm looking for regrinds cams too.

 

Most new camshafts are made from what are known as "semi-finished cores". These cores are purchased completely machined EXCEPT for the lobes which are "semi-finished" or "roughed out". The cores are also heat treated to provide the proper surface material hardness. The hardened material DOES NOT go all of the way through the core. The hardness and the depth of the hardened material varies with the method used. If too much material is removed when the camshaft lobes are "finished", or reground, then the rocker arm contact pad will be running on "soft" material and the camshaft will fail.

The area on the camshaft lobe that does not provide any valve lift is known as the "base circle". The diameter of the base circle has to fall within a fairly small range or the valvetrain geometry will be incorrect. Honda D, B and H series engines use a "slider" rocker arm. If the base circle is too big, or too small, then you will not be able to set the valve lash correctly. Pushrod engines are more "forgiving" with regard to variations in base circle diameter since you can change the length of the pushrod to correct the valvetrain geometry.

Total valve lift is a function of lobe lift multiplied by the rocker arm ratio (if used) and corrected for valve lash. Lobe lift can be pretty closely estimated by measuring the distance across the lobe between the point of maximum lift (also known as the "nose") and the base circle (also known as the "heel"), and then subtracting the base circle diameter. (Please note that this method provides ONLY an estimate of the lobe lift and that it loses accuracy as duration inceases.)

Since you can't change the rocker arm ratio in a Honda engine, if follows that you have to increase lobe lift if you want to increase valve lift. BUT since you can't reduce the size of the base circle very much, and since regrinding REMOVES material, then you really can't increase lift very much at all with a regrind.

A lot of camshafts can be "reconditioned" (returned to stock or near stock specifications), but you need to be VERY careful when you look at reground camshafts for performance applications.

 

Good info!

 

On the other side, I have over 100 passes on Web reground cams (from a Honda automatic core cams) with no sign of wear on the lobes. The motor makes over 500 to the wheels (turbo) and runs close to 10,000 rpm. Only problem is I can't use my Honda valve lash tool as the center adjusting screw is too deep into the locking nut

 

100 passes is only 25 miles!! Reground cams will not last like OEM honda cams will, the heat treat and hardness is very thin.

 

I don't disagree about the hardness but I use up a lot of parts running those 25 miles at 7000 to 10,000 rpm but no cam failures.

 

it might take 10,000 miles for the cams to fail. a stock honda cam will go 300,000+..

 

Hey man, I'll sell you both of my Stock ITR cams (16000 miles on them) for $250 for both. For pick up or you pay shipping. Hell for 350 I'll sell you my stock pistons and rods, plus cams.