Dynamometer Results & Comparisons - Low dyno #s with headers
04-16-2005, 01:44 PM
I just dyno'd my car today, it's an 02 z28 A4 3.23s
slp flopac and loudmouth and just got coated pacesetters ORY installed,
the car dyno'd at 318-320rwhp and 322-330rwtq before the headers, on different dyno's
my new numbers are 329rwhp and 340rwtq,
so I only gained 6-10rwhp and 6-10 rwtq from headers?
the A/F ratio was 13.08
what do you think?
04-16-2005, 02:17 PM
Like you said " On different dyno's". To give it a honest comparision, it should be done on the same dyno.
04-16-2005, 02:24 PM
You never know with dynos. After all, they are only a tuning tool. Don't get too hung up on what the dyno puts out so long as everything else looks okay and it's not way way off. Ever run at the track? Best power/performance test there is.
04-16-2005, 02:57 PM
Not too surprised by the numbers. The stock cam has too little overlap for headers to show their stuff. Most of the gains (when running stock cam) come from reducing pumping losses and backpressure. Add a cam with more overlap and you should see some really nice gains.
04-16-2005, 04:13 PM
If those are unlocked #'s they are good. Also they did run it in third right?
04-17-2005, 09:51 AM
I'm not sure what locked or unlocked numbers mean, but
I'm going to the track next week, so we'll see what it does, because it feels and sounds much better than before.
04-17-2005, 10:08 AM
It meens did they lock the convertor for you on the runs or just let the torque convertor alone. If they didn't lock it your numbers will be lower 8-15 rwhp is normal for unlocked dyno. Plus if they run it in 2nd your numbers will be off to. The track is the best place though.
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