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7AT w/ I-H-C-E Dyno'd
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Max Hp: 305.3, Max Torque: 241.2. Current mods are Stillen Gen3 Intake, Stillen Headers, Berk HFCs, Stillen Cat-back. This was a DynoJet at Carboy in Houston, 3 pulls, very humid day. They used 4th gear on the 7AT for the pulls.
Video of all 3 pulls shot on my mini-DV: [YOUTUBEHQ]gj6MetAjrCY[/YOUTUBEHQ] I don't have graphs to post yet, but I have the raw data attached here in a zipfile. Unfortunately DynoJet's free software to interpret the data and make graphs is Windows-only, and I only have Macs here. Could someone grab the attached data and make some pretty graphs for me? Preferably include the A/F data too (it's in there). As I said in the other thread.. These numbers sound a little low to me for full intake/exhaust compared to what else we've been seeing (given that its a DynoJet), but on the other hand (a) This is a 7AT, the rest have all been 6MT so far, (b) It was extremely humid in Houston today, and (c) Every dyno and every car is different. I'm planning to hit a Dyno Dynamics place on Monday if I can, which will provide another good data point. This is the link to the DynoJet windows software (click "Trying to View Your Run"): Dynojet Research Inc. - Software - Downloads, and the raw data from my DynoJet runs in 4th gear is attached, if anyone wants to process it for alternative graph views. UPDATE: Attempted 5th gear run on same DynoJet, doesn't fly because with the 7AT's rear-end ratio, you can't top out the revs in 5th due to the stock ECU's speed limiter tripping at 160 mph. Also did a Dyno Dynamics run at EngineLogics (these guys were great btw, highly recommend going there to other Houston-ites), which clocked in at 300 hp and 243 tq. At this point, I'm kinda suspicious of the DynoJet results, the machine may be mis-calibrated or something. It doesn't jive with my Dyno Dynamics results given what we know about how they typically read versus each other. Attached are various related graphs: Dyno Dynamics HP+TQ vs RPM (all 3 runs): http://www.the370z.com/members/wstar...-tq-vs-rpm.jpg Dyno Dynamics HP+AFR vs RPM (all 3 runs): http://www.the370z.com/members/wstar...afr-vs-rpm.jpg DynoJet HP+TQ vs RPM in 4th (best run): http://www.the370z.com/members/wstar...m-4th-gear.jpg DynoJet HP+TQ vs Speed in 5th (only run, incomplete): http://www.the370z.com/members/wstar...d-5th-gear.jpg |
I know the dyno is adding to the sound, but damn your Z sounds great! :tup:
dyno report/video = rep points |
Why wasn't it dynod in 5th gear?
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5th gear on the auto is 1.0. Most cars are dynod in the gearing that is 1.0.
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It doesn't make a enough difference which gear they dyno it in. 4th and 5th reveal results within 5hp on cars making over 500HP. HP is a calculation of torque (from what I understand).
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Sounds mean as hell. And most cars are dyno'd in their 1:1 gear,but as stated earlier it probably wouldn't make too much of a difference. Either way... nice numbers for an auto although I was expecting more on the torque end.
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Edit: Check out this thread: http://www.the370z.com/engine-drivet...gear-dyno.html DannyGT got a baseline done today on a DynoJet. 282whp. 5th gear. So the delta between his baseline and your number is 23hp. I know these are different cars, but still, with the full intake & exhaust setup you've got, you have to be making more than 23whp over stock. The cat-back and HFCs alone yield way more than that. |
How's your AFR? Also, did you gain or lose response. I'm wondering if headers + HFC + exhaust would have any adverse effects with torque and throttle response.
I may do the same setup, but leave the intakes stock. |
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By response did you mean throttle response? It revs unloaded a lot quicker than it did before, but I think that's pretty much a given. I don't think I've lost any torque at useful RPMs, although I think I've dropped some torque in the very low RPMs (3k and under -ish), just based on feel when driving. |
ya dude, 5th gear is where you wanna be.
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Well, I do agree that 1:1 is always best for dynos, but it's just been my experience that you're still getting a ballpark and sometimes even very close to accurate result in 4th. It's anything less than 4th that things start going way off course.
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The mods are probably overkill for my everyday driving, but it's all in good fun. I wonder how much torque we can recover from having a tune. This is definitely something to work on this July during my 2-week company shutdown. :tup: |
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