[lito]

Dynoed the car yesterday with Giac S1 with only BMW Perf Exhaust. I was hoping to crack 300+whp with the flash, but as you can see came up a bit short. I was told that Mustang dyno will yield lower numbers than Dynojet but will be more acurate. Will be installing Injen intake, so hopefully that will get me into the 300whp club.




A short video of the dyno run. I have to admit the sound of the BMW Perf exhaust just so exhilarating on high RPM

[Mr. 5]

Good job.
Yah, mustang dynos read lower because they apply a load to the dyno, which is more like real world driving conditions.

[OpenFlash]

Originally Posted by Mr. 5

Good job.
Yah, mustang dynos read lower because they apply a load to the dyno to simmulate real world driving conditions.

This is completely untrue. Load is load. The only difference is that a load bearing dyno is able to apply a variable load in order to keep the rate of acceleration (ramp up) constant. Great for tuning since you can, among other things, hold a certain RPM/load combination constant for datalogging/tuning purposes.

But as far as show-your-power runs go, a load bearing dyno (doing a constant ramp test) is actually LESS realistic than an inertial dyno (dynojet) which applies a constant load (ie roller of fixed mass) that results in a variable ramp up rate. Which is more similar to what you would see on the street since the mass of your car is constant.

These "more realistic load" claims really get under my skin because they are often used in the context of an excuse from tuners. When you can't blame the tune, simple, just blame the dyno. This doesn't apply in this case but i've seen it used before by various sales people, from various companies, who should know better.

end of rant

shiv

[Mr. 5]

Fair enough. Edited my post.

[Sniz]

stage II and meth stat!

your car looked great in person, I left just as you were getting on the dyno, wish I was still there.

[tmdb335]

Originally Posted by lito

Dynoed the car yesterday with Giac S1 with only BMW Perf Exhaust. I was hoping to crack 300+whp with the flash, but as you can see came up a bit short. I was told that Mustang dyno will yield lower numbers than Dynojet but will be more acurate. Will be installing Injen intake, so hopefully that will get me into the 300whp club.




A short video of the dyno run. I have to admit the sound of the BMW Perf exhaust just so exhilarating on high RPM

were you at the CPE dyno day? I was there to with my silver 335.

[tmdb335]

I heard that is a really low reading dyno. For reference two of my buddies with evos who put down 380 whp on a dynojet only put 290 on that same dyno.

[BzzzBom]

Originally Posted by shiv@vishnu

This is completely untrue. Load is load. The only difference is that a load bearing dyno is able to apply a variable load in order to keep the rate of acceleration (ramp up) constant. Great for tuning since you can, among other things, hold a certain RPM/load combination constant for datalogging/tuning purposes.

But as far as show-your-power runs go, a load bearing dyno (doing a constant ramp test) is actually LESS realistic than an inertial dyno (dynojet) which applies a constant load (ie roller of fixed mass) that results in a variable ramp up rate. Which is more similar to what you would see on the street since the mass of your car is constant.

These "more realistic load" claims really get under my skin because they are often used in the context of an excuse from tuners. When you can't blame the tune, simple, just blame the dyno. This doesn't apply in this case but i've seen it used before by various sales people, from various companies, who should know better.

end of rant

shiv

I must have had too much beer tonight. I thought this was a GIAC thread.

[BrianMN]

Originally Posted by BzzzBom

I must have had too much beer tonight. I thought this was a GIAC thread.

OMG HAHA good one dude...cause he was totally clarifying something related to GIAC

[forza1976]

Originally Posted by BrianMN

OMG HAHA good one dude...cause he was totally clarifying something related to GIAC

+1

I don't understand why everyone is so immediately defensive these days???

[Sniz]

Originally Posted by BzzzBom

I must have had too much beer tonight. I thought this was a GIAC thread.

yup you must have and yup yes this is

[Brey335i]

As far as I could understand, Shiv made no attacks on GIAC, but rather on the dyno and what Mr.5 said. I don't really know anything about these things but the way I read it, there was no mention of Procede > GIAC as far as I could tell...

Wow, people really jump on each other here huh? Well, I guess in the end, competition is good... and we do seem to rally together when it comes to hating on other cars like Audi, Mercedes, Nissan, Lamborghini, Bugatti, Ferrari, etc...

[MF80]

Both hp and torque are too low for my right foot...

[cstavaru]

I obtained 293whp on Mustang with the Power Kit...with a 273 baseline. Do you have a baseline for your car ?

[Clap135]

I was also there for the cpe dyno day and I did a base line on my last pull. I ended up getting 252whp on the stock tune and 349 when I plugged in my map.
Mods: dci/chargepipe/meth/v4

[BobS]

I wouldn't be discouraged.....Check out my thread with GIAC stg1 dyno results, its very different. My car is completely stock besides the tune and my base was 281whp, 321 wtq, with stg 1, I got 348 whp and 378 wtq. A gain of 67 whp, and 57 wtq. Did you do a baseline run to compare? The gains are what matters. If you search you can see my dyno results.

[lito]

Originally Posted by Mr. 5

Good job.
Yah, mustang dynos read lower because they apply a load to the dyno, which is more like real world driving conditions.

Originally Posted by Sniz

stage II and meth stat!

your car looked great in person, I left just as you were getting on the dyno, wish I was still there.

yeah S2 is in the future. Yah you missed that sweet sounding BMW Perf exhaust on high RPM.

Originally Posted by tmdb335

were you at the CPE dyno day? I was there to with my silver 335.

Yah got there around 12. I don't recall seeing a silver 335 all I remember seeing was an AW coupe owned by one of the shop employee.

Originally Posted by tmdb335

I heard that is a really low reading dyno. For reference two of my buddies with evos who put down 380 whp on a dynojet only put 290 on that same dyno.

wow! that's a huge difference.

[lito]

Originally Posted by cstavaru

I obtained 293whp on Mustang with the Power Kit...with a 273 baseline. Do you have a baseline for your car ?

Originally Posted by BobS

I wouldn't be discouraged.....Check out my thread with GIAC stg1 dyno results, its very different. My car is completely stock besides the tune and my base was 281whp, 321 wtq, with stg 1, I got 348 whp and 378 wtq. A gain of 67 whp, and 57 wtq. Did you do a baseline run to compare? The gains are what matters. If you search you can see my dyno results.

Unfortunately the shop I had the car tuned did not have any of the Giac handheld switcher in stock so I couldn't get a baseline run, but I heard few 335i's ran 240 whp on average on that particular dyno machine. So I'm about right on the money as far as gains Giac claims of 51whp and 60trq

[lito]

Originally Posted by Clap135

I was also there for the cpe dyno day and I did a base line on my last pull. I ended up getting 252whp on the stock tune and 349 when I plugged in my map.
Mods: dci/chargepipe/meth/v4

Yah I bet that car is a blast to drive. Do you have LSD installed?

[techlogik]

So you don't have a baseline? Edit...saw your post, didn't have the map switcher.

I pulled 311rwhp/323rwtq with a Stage 1 Giac and drop in filter on a Dynojet.

It was a 48/48 gain for each respectively over the stock map. Which is probably a few hps over the real stock anyway. So the gain over stock was probably really 50-52 for hp/tq I would guess over a true stock map compared to GIAC's stock map.

I think the gains are in line as advertised. I have an AT...so there is definitely some torque differences in seems compared to an AT.

My dyno post is here: http://www.e90post.com/forums/showth...highlight=giac

[TreDirtyFive]

I also did 320rwhp and about 350rwtq on GIAC S1 on my otherwise stock E92 (dynojet). I was at 275/290 completely stock.

[Clap135]

Originally Posted by lito

Yah I bet that car is a blast to drive. Do you have LSD installed?

no lsd. I have traction issues, but its alwasy two nasty strips on the ground. An lsd won't help that lol