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SN95 Cobras
Just got my dyno tune! kinda upset :(
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<blockquote data-quote="Prostyle" data-source="post: 10660256" data-attributes="member: 99171"><p>Hey guys just wanted to fill you all in.</p><p></p><p>Just got home from a 5hr trip back from norms garage. I took the car up to tim barth to get a tune.</p><p></p><p>Car made 448rwhp/47x on 10lbs of boost.( ill get the graph up tomorrow)</p><p></p><p></p><p>BUT there is problems guys!</p><p></p><p>At around 5.5krpm its dieing out and not making anymore power and it shooting black exhaust smoke from my upper intake.</p><p></p><p>Tim said it mostly like is lifting the valve springs and causing it to happen? Any of you ever heard of this? Maybe just a bad upper intake gasket?</p><p></p><p>I just want my car to be right, and only taking my car to 6k rpm isnt fun! I easily could make more power, but it seems like at 5.5k it hits a wall ( big boost leak maybe? )</p><p></p><p>Any input would be awesome guys.I have no clue what is wrong. I beleive tim is right but i just wanted some opionins</p><p></p><p>here is a full list of mods. </p><p></p><p></p><p>.30 over teksid block</p><p>forged cobra crank had polished stock size bearings</p><p>clevite 77 bearings</p><p>MMR forged 4340 H beam rods with arp 2000 bolts</p><p>DSS forged -12cc pistons</p><p>all felpro gaskets</p><p>cop conversion with 03 cobra cops and red monster cop harness</p><p>new ngk tr6 plugs .025gap</p><p>on3 turbo kit with a mpt70</p><p>wally255 intake/bosch 044 inline</p><p>9.1/1compression</p></blockquote><p></p>
[QUOTE="Prostyle, post: 10660256, member: 99171"] Hey guys just wanted to fill you all in. Just got home from a 5hr trip back from norms garage. I took the car up to tim barth to get a tune. Car made 448rwhp/47x on 10lbs of boost.( ill get the graph up tomorrow) BUT there is problems guys! At around 5.5krpm its dieing out and not making anymore power and it shooting black exhaust smoke from my upper intake. Tim said it mostly like is lifting the valve springs and causing it to happen? Any of you ever heard of this? Maybe just a bad upper intake gasket? I just want my car to be right, and only taking my car to 6k rpm isnt fun! I easily could make more power, but it seems like at 5.5k it hits a wall ( big boost leak maybe? ) Any input would be awesome guys.I have no clue what is wrong. I beleive tim is right but i just wanted some opionins here is a full list of mods. .30 over teksid block forged cobra crank had polished stock size bearings clevite 77 bearings MMR forged 4340 H beam rods with arp 2000 bolts DSS forged -12cc pistons all felpro gaskets cop conversion with 03 cobra cops and red monster cop harness new ngk tr6 plugs .025gap on3 turbo kit with a mpt70 wally255 intake/bosch 044 inline 9.1/1compression [/QUOTE]
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Just got my dyno tune! kinda upset :(
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