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SVTPerformance's Chain of Restaurants
Tuning À la carte
97 Cobra Vortech supercharger with 12 psi load issue
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<blockquote data-quote="Denver_SVT" data-source="post: 16042847" data-attributes="member: 72321"><p>Ok again we have 97 Cobra with Vortech supercharger (14 psi) after leak issue fixed. We upgraded to forged Pistons, rods and crankshaft, LT headers, SCT 3000 MAF, 60lb injectors, and return fuel system. We tuned the car for idle, partial throttle and WOT. For idle we got 14-15 AF, Partial throttle 14-15 AF, and WOT 11.4 AF and then we run the car at the dyno and only see 370 rwhp with 12 psi at 6100rpm when we face a leak from pipes and from datalog we only see 0.950 load and 656 MAF AD count with Air flow 27000. The MAF AD count bring question marks to my mind why it doesn't go higher to 850?? </p><p>We did leak boost test and we found couple of leakage that we fixed and bring up the boost up to 14 psi but we didn't run it at the dyno because we want to make sure at the road when we did a quick test with datalog that we should see the MAF AD count go to 850 and during the run at the street we found out the Battery voltage drops from 13 to 12.2 volts. After more inspection to the car we found the red cable from the battery going to alternator half of it already eaten like half cut on it. I asked him to change the cable and change the alternator from factory to Power Master alternator 200amp. So, after fixing all issues hopefully things will be changed. </p><p></p><p>In the end I would like to know can a bad alternator affect the power that much as we supposed to see around 500 rwhp ? Do you think a MAF AD count 656 will make us to concern or that's fine?</p></blockquote><p></p>
[QUOTE="Denver_SVT, post: 16042847, member: 72321"] Ok again we have 97 Cobra with Vortech supercharger (14 psi) after leak issue fixed. We upgraded to forged Pistons, rods and crankshaft, LT headers, SCT 3000 MAF, 60lb injectors, and return fuel system. We tuned the car for idle, partial throttle and WOT. For idle we got 14-15 AF, Partial throttle 14-15 AF, and WOT 11.4 AF and then we run the car at the dyno and only see 370 rwhp with 12 psi at 6100rpm when we face a leak from pipes and from datalog we only see 0.950 load and 656 MAF AD count with Air flow 27000. The MAF AD count bring question marks to my mind why it doesn't go higher to 850?? We did leak boost test and we found couple of leakage that we fixed and bring up the boost up to 14 psi but we didn't run it at the dyno because we want to make sure at the road when we did a quick test with datalog that we should see the MAF AD count go to 850 and during the run at the street we found out the Battery voltage drops from 13 to 12.2 volts. After more inspection to the car we found the red cable from the battery going to alternator half of it already eaten like half cut on it. I asked him to change the cable and change the alternator from factory to Power Master alternator 200amp. So, after fixing all issues hopefully things will be changed. In the end I would like to know can a bad alternator affect the power that much as we supposed to see around 500 rwhp ? Do you think a MAF AD count 656 will make us to concern or that's fine? [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
97 Cobra Vortech supercharger with 12 psi load issue
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