Pure Stock 2012 5.0 VMP Stage-2 Results

[mikengail]

Well, finally got the car dyno tuned, after having Justin's TVS kit installed 3 weeks earlier by Chicane23 (chicane23.com). VERY clean install from that shop, by the way. Special thanks to B&R Performance Automotive in Oklahoma City for the dyno time. Justin's canned tune that came with the kit had some data logged adjustments only, but was really great in all situations from the tamest parking lot creeping to hot day rolling WOT pulls to 130+.

I wasn't optimistic that additional fine tuning with a dyno would be noticeable, but I was happily wrong. This car was previously pure stock only having had an AED 91 octane A6 tune and GT500 axle backs. No suspension options from the factory or after market. All available comfort options possible and probably as comfortable a later model 5.0 as there is. With the AED tune, it would chirp the rear tires on 2-3 shifts even on new hard concrete roads. Now, it will do it on 3-4 shifts. Amazing to me anyway.

Dyno graphed results added. Max rpm limited to 6600. Notice the 405 ft/lbs of rear wheel torque at only 2200rpm! I don't know what the estimated flywheel hp would be, but it certainly feels north of 600. It hangs with my wife's stock '14 Shelby just fine...

 

[92fiveohfox]

Do you have a before graph of the canned tune vs the dyno tune? Why did you stop at 6600? It's still pulling!

 

[mikengail]

Do you have a before graph of the canned tune vs the dyno tune? Why did you stop at 6600? It's still pulling!

I have no idea why the rpm limit. I'll ask my installer. I would have been curious to see what it was pulling all the way up to 7k. Fairly tame 91 octane tune and only a 85mm pulley for 8lbs boost. Should have been safe, I would think. I'll get the canned tune graph and upload it later today...

 

[CodyK7]

at what point do the 5.0 injectors need to be upgraded? Nice numbers. Got any pics of the engine bay?

 

[92fiveohfox]

I have no idea why the rpm limit. I'll ask my installer. I would have been curious to see what it was pulling all the way up to 7k. Fairly tame 91 octane tune and only a 85mm pulley for 8lbs boost. Should have been safe, I would think. I'll get the canned tune graph and upload it later today...

Thanks, I appreciate it. I bet you are at 560 at least at 7000. That tq curve is awesome, how does it feel driving around town?

 

[mikengail]

Thanks, I appreciate it. I bet you are at 560 at least at 7000. That tq curve is awesome, how does it feel driving around town?

Here's the first run graph. Sorry, it's a pic of the dyno's LCD display. The car feels like a high compression NA 450+ incher, only stronger. I had a '67 Buick GS400 with a '70 455, Muncie 4-speed rated for 510 ft/lbs at 2800rpm. By comparison, my 5.0 now feels stronger to me and that old Buick felt like it could pull up tree stumps. Flooring it has the sensation of walking in a field and stepping into an old uncovered small well. Until I got used to it, I would catch myself changing my grip on the steering wheel to more around the back, as if to help me to hold on from the effects of the positive g's at WOT. This car was fun to drive anyway, but now the fun factor is close to that of the wife's Shelby...

 

[mikengail]

at what point do the 5.0 injectors need to be upgraded? Nice numbers. Got any pics of the engine bay?

Here's some pics of the install. The kit comes with 47lb injectors, a ported elbow, twin 60mm TB, JLT 123mm CAI, a HUGE dual fan triple pass inter-cooler and more. It's as well behaved driving in city traffic as it was stock, just a little more touchy (in a good way...). My wife drives it to work and loves it.

 

[BrianH87]

That initial graph looks kind of strange. As far as your rpm limit goes, VMP usually has user adjustible options in the SCT that you can adjust. Rev limit is one of those options. I would change it to at least 7000 if not 7400.

 

[CodyK7]

Pretty badass. Enjoy it

 

[mikengail]

That initial graph looks kind of strange. As far as your rpm limit goes, VMP usually has user adjustible options in the SCT that you can adjust. Rev limit is one of those options. I would change it to at least 7000 if not 7400.

I was told a couple of reasons for the first graph. One, the converter in the auto wasn't locking up properly throughout the run. The other, the ECM kept enriching the A/F at some rpm points overprotecting the factory cats. Justin solved it all in one update. As for the 6600 limit, my installer told me that the primary purpose of these runs was to zero in the tune for all around performance and daily driving reliability. No need to run it all the way up for that. An extra 300-400rpm wasn't going to tell him anything more about the validity of the tune. I was certainly good with it. I don't know to what rpm Justin has the WOT shift set. Not a lot of opportunities to safely find out lately...

 

[CodyK7]

You could have just called Bj. He would have left you know.

 

[mikengail]

That initial graph looks kind of strange. As far as your rpm limit goes, VMP usually has user adjustible options in the SCT that you can adjust. Rev limit is one of those options. I would change it to at least 7000 if not 7400.

Emailed Justin and he said that the tune is set to shift between 7000 and 7400...

 

[Justin@VMP]

You can get all kinds of weird looking graphs depending on how you dyno the car. That looks like a slow roll on combined with the converter not being locked hard initially. You don't have to worry about the RPM much, at this power level, anything at 7500rpm or less is fine.

Above 600rwhp i would recommend something larger than 47lb injectors, stage 3 comes with larger injectors.

 

[jblood37]

I don't know much about 5ohs, but is that typically where the a/f ratio stays during wot?

 

[BrianH87]

I don't know much about 5ohs, but is that typically where the a/f ratio stays during wot?

With boost, I've seen afr's all over the place with people's graphs. Personally, I like to see 11.0-11.5 on my TVS.

 

[J.Kincaid]

That torque curve is outstanding...congrats!

 

[jblood37]

With boost, I've seen afr's all over the place with people's graphs. Personally, I like to see 11.0-11.5 on my TVS.

O ok got ya. I just saw it come back up to around 13 during the pull and I didn't know if that was common.

 

[stagedz]

man that's awesome....congrats!

 

[yngrshr]

So, do you have your RPM limit set to 6600? Just curious.

 

[mikengail]

So, do you have your RPM limit set to 6600? Just curious.

No, the shift points are in the 7000 to 7400 range. The reason the two dyno results were limited to 6600 is that it was just to validate and fine tune. No max hp/tq runs. An extra 400 or so rpm was not going to tell my installer anything more with respect to the quality of the tune. I wasn't concerned with bragging rights, just a stable relatively tame tune for the stock bottom end. With stock exhaust and GT500 axle backs, it's not even all that loud. The blower whine is awesome though. I even like the way the twin inter cooler fans run all the time. Is yours an A6 too?