Fast Intentions exhaust and header comparison. Before and after UPRev tune (Dyno)

Pablo Z

My understanding (and it could be wrong) is that you want to get as close to 1:1 for the TQ & HP readings to be truly 'real world' numbers. I'm sure someone more knowledgeable than me will be able to provide a better/more accurate explanation.

XwChriswX

Where are you doing your runs at? Have you gone to any particular shops over there? Being in Chandler you must know of INTENSEMotorsports right? Those guys are awesome!

I wish there were more shops over here on the west side.

__________________

Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

B1nks

On the west side of what ? If you're talking about the west coast then you're crazy because there are a TON of badass shops there. Also if you're talking about AZ then there are still plenty there. They may not be Z only shops but there have been a few shops in AZ featured/mentioned in magazines such as Modified.

Pablo Z

Runs were done in Tempe at (S)uperior (R)acing (D)evelopment with Xact Dyno (first listing on UpRev's Web site for Dealers/Tuners) which is in the same shop (separate business run by Tim).
Yes - know about Intense Motorsports' rep. The guys at SRD are good and not too pricey. Chet the owner is real straight up guy. SRD are also going to start distributing Tony's exhaust (and LTH's no doubt). They sold one to another customer after they saw the quality and heard mine.
As far as what I'm going for with this car - keeping the wife happy since it's her daily ride. If it was mine I would be going all out (TT kit, hardened tranny, etc) and going to SpeedWorld and Firebird to challenge my old Turbo Regal buddies.

semtex

Someone else could probably explain better, but I'll give it a shot. The purpose of a dyno is to measure power output. Now, the 'cleanest' way to do that is to take the engine out of the car and mount it to an engine dyno. But that's not exactly practical, right? So most people just dyno at the wheels. Not only is it a tad more convenient than taking your engine out, but you're also measuring how much power you're putting to the ground, which many would argue is what counts anyway. So, that being said, you want to get a reading from the wheels while in a gear that provides a 1:1 ratio, because a gear ratio of 1:1 means that the engine and the transmission’s output are moving at the same speed. You want the engine and transmission to be in synch in order to get an accurate reading. Does this make sense at all? Like I said, I'm sure someone else can do a better job of explaining this.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

XwChriswX

LoL I must have made myself sound like a dumbass...

I understand the reason behind a dyno and what it does for you, what I'm asking is why do they pick 1 particular gear (obviously now for the 1:1 ratio thanks semtex! ) But I mean, does that give you the best Total output?

I'm just wondering for 'Practical' output... Say just like you would on a 1/4 mile, do a dyno thats actually going up through the gears just like you would in a race... Or would that be just completely retarded?

__________________

Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

semtex

If you went up through the gears I think you'd just end up with a separate chart for each gear. Because think about a dyno chart. On the x-axis it has the rpm scale. So you go through 1st gear and there's one graph showing your hp from 2k - 7500 rpm. You shift into 2nd and there's another graph showing hp from 2k - 7500 rpm. And so on and so on. On a 6MT, you'd end up with 6 dyno sheets. 7 for those with the 7AT. As for why they choose the gear with 1:1, I don't think it's so much that it gives you the best numbers, but more that it gives you the most accurate numbers, seeing how engine and transmission speed are in synch with one another.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

Pablo Z

I must admit I was somewhat surprised also considering what Tony got on the LTH comparison runs from SpecialtyZ and also considering that the timing changes were kicked out by the ECM during the pulls with his customer. This tuner claimed that the timing changes (didn't reveal exactly what they were) he made were not kicked out. I asked him about the pulls in 5th and he said that 5th is closer to 1:1 than 6th or 7th which are essentially overdrive.
He was also really surprised at what the motor put out in 4th.

XwChriswX

Oh shit?! I just realized yours is a 7AT also?!

AND your in Chandler! What's up! lol

Wow, those numbers hit closer to home now... Do you have any specific goal your trying to reach, or just as high as you can?

__________________

Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

semtex

Yeah the measurement is just in a single gear. You've seen my dyno vids, right? If you watch closely, you can see them run up through to 5th gear quickly, then they just hold it there for a sec at like 2500 rpm while they hit the start button on the measurement software, then they floor it all the way to redline and then they're done.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

XwChriswX

I guess I just need to go to a dyno shop and have them see what my baselines are... And let them explain it to me as they do...

How much +/- will a run set you back? Say if I wanna do 3 for a good average to use as my baseline?

__________________

Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

semtex

Depends on the shop. Anywhere from $70-$100 is the norm. And 3 pulls is also standard.

__________________
"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

vipor

3 runs with no tuning at a shop around here is like $65. I think it allocates you like an hour and 1 technician. You can do minor things to your car in between, but that's it.

__________________

2009 NISMO # 0193 | QAB | Albums! | 05.04.10 (Dynojet) 291.94hp/248.28tq
Oil Cooler (DIY) | Custom Headlights | GTSPEC Braces | F.I. Long Tube Headers

XwChriswX

Hmm, ok. That sounds reasonable right?

__________________

Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

vipor

Just called another shop who has a 4WD dyno and they charge $75 for 3 runs regardless of 2WD/4WD.

EDIT: hahaha just called Jotech and they said $85 or $100 with wideband

__________________

2009 NISMO # 0193 | QAB | Albums! | 05.04.10 (Dynojet) 291.94hp/248.28tq
Oil Cooler (DIY) | Custom Headlights | GTSPEC Braces | F.I. Long Tube Headers