Valhakar Posted December 14, 2006 Share Posted December 14, 2006 I have a stock exhaust manifold that was tapped for an EGT probe. On the 2.0L H4, cylinder 4 is notorious for spiking EGT under hard driving. Would this count as modification of the stock manifold? If so I may as well port and polish the stock headers to get a bit more torque. Quote Link to comment Share on other sites More sharing options...
National Staff Greg G. Posted December 15, 2006 National Staff Share Posted December 15, 2006 I personally would not count that as a modification (although I suppose for the track lawyer strict definition guys, it is). I would declare it to be a non-performance enhancing modification as long as nothing else was done to the manifold. Quote Link to comment Share on other sites More sharing options...
Valhakar Posted December 15, 2006 Author Share Posted December 15, 2006 I personally would not count that as a modification (although I suppose for the track lawyer strict definition guys, it is). I would declare it to be a non-performance enhancing modification as long as nothing else was done to the manifold. My worries exactly. Funny you should mention "track lawyer". I am the engineer, the wife is a lawyer. Hence all the clarifications. I will just take the points and PnP/ceramic coat them AND retain the stock heat shield. No one can make a challenge and I gain a few hundred RPM in spool and more torque. 5 Points for the header+ turbo back + cat removal seems fair enough. Specially since it allows me to do pretty much anything I want as long as I don't touch the turbo. Quote Link to comment Share on other sites More sharing options...
subachad Posted December 15, 2006 Share Posted December 15, 2006 I personally would not count that as a modification (although I suppose for the track lawyer strict definition guys, it is). I would declare it to be a non-performance enhancing modification as long as nothing else was done to the manifold. My worries exactly. Funny you should mention "track lawyer". I am the engineer, the wife is a lawyer. Hence all the clarifications. I will just take the points and PnP/ceramic coat them AND retain the stock heat shield. No one can make a challenge and I gain a few hundred RPM in spool and more torque. 5 Points for the header+ turbo back + cat removal seems fair enough. Specially since it allows me to do pretty much anything I want as long as I don't touch the turbo. Do you already have a gutted, 05 or newer, or aftermarket up pipe? If not, you will probably get a better return on your investment than porting the exhaust manifold. Quote Link to comment Share on other sites More sharing options...
Valhakar Posted December 16, 2006 Author Share Posted December 16, 2006 Do you already have a gutted, 05 or newer, or aftermarket up pipe? If not, you will probably get a better return on your investment than porting the exhaust manifold. Do I have a gutted or aftermarket uppipe. My 2.0L with the stock TD04 runs 10.5:1 AFR and 18 pounds of boost when on the track. If I had not already invested in a Crucial Racing Ceramic coated up pipe and downpipe the turbo would have exploded by now. I have ceramic coated PnP exhaust manifolds sitting in the garage, I will just have to tap an EGT in it for install. Pnp + Ceramic coating + stock heat shields = super cool lower engine. The exhaust literally wraps around the entire bottom of the H4 heads and oil pan. Ask me if I have a part and I most likely have 2-3. The final track exhaust will be 3 inch ceramic coated all the way back. Quote Link to comment Share on other sites More sharing options...
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