Richard Bennett

I am rebuilding an 89 turbo motor, and am considering changing cams. I have heard rumor that the 89 NA cam has the best profile to use in a Turbo. Anybody confirm or deny. I have also heard that Milledge has a cam. Do they work, how much and where do you get them, what kind of power/torque gain. My car has a hot wire mass flow sensor kit, plus suitable chips, and will have a K26 Hybrid turbonetics Turbo after the rebuild. Its a street/track car

Luke

<a href="http://www.jmengines.com" target="_blank">www.jmengines.com</a> -milledge. I strongly reccommed milledge camshafts. yes, they work very nicely. You will make boost sooner and have more top end power(which would be appropriate for a k26 ) they are $600 i beleive.

Richard Bennett

Thanks Luke,

Just the infor I was looking for. Anyone know what jusyt the cam on its own is worth HP and Torque?

Richard

Konstantin

JM say at least 20 HP for the stage 1

Konstantin

Danno

Check out the "camshaft diagrams" on my website: <a href="http://members.rennlist.com/951_racerx" target="_blank">951 RacerX website</a>. As you can see, the 944NA cam is only marginally different than the Turbo cam. A better value & performance increase can be had from these aftermarket cams makers (in addition to Milledge):

<a href="http://www.webcaminc.com/porsche-auto.html" target="_blank">Web Cam Inc.</a> (grind #274)

<a href="http://www.elgincams.com/c-por5.html" target="_blank">Elgin Cams</a> (their "improved" cam with more area under lift curve)

<a href="http://www.paeco.com/cams.htm" target="_blank">Paeco</a> (order catalog)

One thing to remember is the cam profile must be matched to the flow pattern of your car. That is, it must be optimized for the boost-level that you're running and the boost-curve of our turbo. Just throwing in a cam won't give you much, maybe 5-10hp in a stock car. Getting an adustable cam-gear and retarding your stock cam by just 5-degrees can give you that much by itself.

If you're buidling an engine, there are other factors that will give you better power-increases and more speed than a cam that should be considered while you're in there:

• lightweight crank
• lightweight rods with piston-squirter
• lightweight higher-compression pistons
• 5-angle valve job (70-degree bottom cut makes a huge differnce in flow)
• larger intake valves from 2.7l NA car
• head port & polish

These items will give you more bang-for-the-buck value and increases than a simple cam replacement. In fact, if you get a custom cam-grind after you do these mods, that's when a cam upgrade would give you the most improvements.