jgkurz Posted October 4, 2003 Share Posted October 4, 2003 Hi all, as promised here are the results of my dyno and 1/4 mile run yesterday. Dyno: I made 306.9 HP at 5250rpm and 345.6torque at 4250. This was on 92 octane pump gas and 15psi or 201kpa. I was surprised with peak power being at a low 5250 RPM. It seems the L6's just don't make peak power in the higher range. This is just an observation while looking at other L6 dyno charts. With some additional tweaking I think I can make a litttle more power at the same boost level 1/4 Mile: I drove straight to the strip and raced until midnight. What a blast. My best was 12.936 and 110.14 mph. The hardest part was getting my car to launch with a decent 60ft time. I just have some Bridgestome 205/60-15's that really aren't great for drag racing. Once I lowered the tire pressure and slipped the clutch off the start I was able to get a best of 2.012 60ft. I was just happy not to blow a half-shaft. Here's some quick specs on the car: 77 280Z Weight: ~3000lbs with me in it. 3.0L L28 Mildly ported P90 head Mildly ported N42 intake Isky 480/490 cam Tec3 EFI 450cc injectors Walbo fuel pump Izuzu NPR FMIC BW T-5 Trans Aluminum 240mm flywheel R200 3.7 LSD T04E turbo (JWT Sport 400) .50 A/R housing with 50 trim wheel .63 turbine housing with stage 5 - 10 blade wheel 3" exhaust with Scottie downpipe Quote Link to comment Share on other sites More sharing options...
Cody 82 ZXT Posted October 4, 2003 Share Posted October 4, 2003 nice #'s. Did you do the tunning? Sounds like you are like most of us who could use some bigger and stickier tires. I was surprised to see that your 280 Z weighed that much. Quote Link to comment Share on other sites More sharing options...
PETEW Posted October 4, 2003 Share Posted October 4, 2003 Good numbers. I was wondering, did they really weigh your car, or is the 3000 lb just a guess. I wouldn't think that the 280Z weighed that much. Man, I hope not, I have a '77 too. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted October 4, 2003 Author Share Posted October 4, 2003 So far I have done all the tuning. It's really not that hard with the new Tec3 software and a dyno to help. I might get a real expert to help tighten up the tuning and A/F ratios once I've done all I can. In my opinion, power tuning is easy, it's the drivability that defines a real pro. Last time I weighed the car a year ago it was 2950lbs with me in it. The difference now is I had a 1/2 tank more gas, heavier sway bars and a big cast aluminum FMIC. I approximated 50 more pounds. I also have A/C. It may weigh less, but until I get it back on a scale, this is my best estimation. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted October 4, 2003 Share Posted October 4, 2003 Turn the boost up Nice number. I'm pretty surprice your HP peaking early since you have an aftermarket cam. Is the cam in straight up? Quote Link to comment Share on other sites More sharing options...
jgkurz Posted October 5, 2003 Author Share Posted October 5, 2003 The cam is straight up. I wonder how my power would change if I moved it a hole forward? With 104 Sunoco unleaded and 20 psi I hope to hit 350-360 RWHP on my next dyno session. I'm confident that my turbo is too small at a T04E 50 trim to make any more than 400 crank HP. I should have gone with a 60-1 in my T04E housing. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted October 5, 2003 Share Posted October 5, 2003 This is mine, with stock cam little on retard side. It seems to peak little after 5500rpm Quote Link to comment Share on other sites More sharing options...
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