RovinC Report post Posted December 16, 2005 I have been told more than once now that late build cars (after august) have better heads (6.0 ones), better brakes and upgraded electronics. Does anyone know if this is true? I have heard it from 3 different places now, but cant seem to find facts to verify it. Anyone? C. Quote Share this post Link to post Share on other sites More sharing options...
Guest mark m Report post Posted December 16, 2005 My 99 parts manual does show two different heads, early and late. When I get home tonight I'll look to see if I can see a diff. Mark Quote Share this post Link to post Share on other sites More sharing options...
Guest mark m Report post Posted December 17, 2005 I have been told more than once now that late build cars (after august) have better heads (6.0 ones), better brakes and upgraded electronics. Does anyone know if this is true? I have heard it from 3 different places now, but cant seem to find facts to verify it. Anyone? C. looking at my 99 roadster parts manual, Motor #2220 and later have different heads & valve covers, the phase sensors and phase sensor plates on the front of the heads are also different. Chain Stretcher and cam gear mounting different. Covers on back of heads eliminated. Cams and valves are the same. I don't see any variation in brakes and electronics. Mark Quote Share this post Link to post Share on other sites More sharing options...
Frank Barefield Report post Posted December 26, 2005 looking at my 99 roadster parts manual, Motor #2220 and later have different heads & valve covers, the phase sensors and phase sensor plates on the front of the heads are also different. Chain Stretcher and cam gear mounting different. Covers on back of heads eliminated. Cams and valves are the same. I don't see any variation in brakes and electronics. Mark Mark: I'm making the assumption that the motor # and last 4 didgits of the VIN are the same, right? With my last 5 didgits of my 99 being 12264, it should have the 6.0 parts? Thanks Frank Quote Share this post Link to post Share on other sites More sharing options...
RovinC Report post Posted December 26, 2005 I think built after 8/99 will be for sure correct? Quote Share this post Link to post Share on other sites More sharing options...
Lingenfelter Twin Turbo Report post Posted December 27, 2005 looking at my 99 roadster parts manual' date=' Motor #2220 and later have different heads & valve covers, the phase sensors and phase sensor plates on the front of the heads are also different. Chain Stretcher and cam gear mounting different. Covers on back of heads eliminated. Cams and valves are the same. I don't see any variation in brakes and electronics. Mark[/quote'] Mark: I'm making the assumption that the motor # and last 4 didgits of the VIN are the same, right? With my last 5 didgits of my 99 being 12264, it should have the 6.0 parts? Thanks Frank Let's get the car's out Frank! SR Quote Share this post Link to post Share on other sites More sharing options...
Guest mark m Report post Posted December 27, 2005 Engine number is not the same as the vin. I just checked my engine number: L522 2555, my vin is 12372, 11/99 build date. You need a mirror and flashlight to see the number Mark Quote Share this post Link to post Share on other sites More sharing options...
Frank Barefield Report post Posted December 27, 2005 Mark: Thanks for the info on where to look for the engine #. I will look at it tonight. Where did you get your build date from? I didn't see it on my drivers door plate. Thanks Frank Quote Share this post Link to post Share on other sites More sharing options...
Frank Barefield Report post Posted December 27, 2005 looking at my 99 roadster parts manual' date=' Motor #2220 and later have different heads & valve covers, the phase sensors and phase sensor plates on the front of the heads are also different. Chain Stretcher and cam gear mounting different. Covers on back of heads eliminated. Cams and valves are the same. I don't see any variation in brakes and electronics. Mark[/quote'] Mark: I'm making the assumption that the motor # and last 4 didgits of the VIN are the same, right? With my last 5 didgits of my 99 being 12264, it should have the 6.0 parts? Thanks Frank Let's get the car's out Frank! SR Steve-how about this weekend? frank Quote Share this post Link to post Share on other sites More sharing options...
Guest mark m Report post Posted December 28, 2005 Mark: Thanks for the info on where to look for the engine #. I will look at it tonight. Where did you get your build date from? I didn't see it on my drivers door plate.Thanks Frank Frank, It should be under your drivers door Mark Quote Share this post Link to post Share on other sites More sharing options...
Lingenfelter Twin Turbo Report post Posted December 28, 2005 Sounds good Frank! Let me know. Quote Share this post Link to post Share on other sites More sharing options...
Frank Barefield Report post Posted December 28, 2005 Mark: Thanks for the info on where to look for the engine #. I will look at it tonight. Where did you get your build date from? I didn't see it on my drivers door plate.Thanks Frank Frank, It should be under your drivers door Mark Mark: I will look at my door panel tonight for the build date, but I don't think it is on my plate (seems strange-looked at it last night-maybe I'm going blind). BTW, I did check my engine number and it is L522 2273, which is good. I've also looked at photos of valve covers and heads on a 6.0 and they do look exactly the same as mine. The fact that they are the same is very interesting. I wonder if there is any additional performance difference due to the differences on late build 99s. Frank Quote Share this post Link to post Share on other sites More sharing options...
Frank Barefield Report post Posted December 28, 2005 Sounds good Frank! Let me know. Steve-will be in touch-we need to check the barometric pressure, temperature, dew point and determine if there is rain anywhere in the continental US. Frank Quote Share this post Link to post Share on other sites More sharing options...
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