[ac2]

Originally Posted by 3thirty5

i'm suprised there's such a huge variation in terms of base line hp with some of the cars... from 259hp to 277hp. granted one is probably auto and the other manual... but still, that's a 18hp difference!

By looking at the dyno, in the dyno the top end roll off, the car that made 277hp is an auto...
My manual 335 only dyno 270hp at the wheel and I did the hard break in. How sad ..

[Walked U]

Originally Posted by ac2

By looking at the dyno, in the dyno the top end roll off, the car that made 277hp is an auto...
My manual 335 only dyno 270hp at the wheel and I did the hard break in. How sad ..

Mine did also dont be sad. I made 273 rwhp and 282 wtq stock.

Its ok tho it made it up with a tune

[ac2]

Waiting the PROcede to be shipped now

[IMJUSS2NASTY]

Shiv needs to find a way to keep HP from dropping on high RPM's.

[teknochild]

Originally Posted by IMJUSS2NASTY

Shiv needs to find a way to keep HP from dropping on high RPM's.

that would take redesigning the engine

[ac2]

Originally Posted by teknochild

that would take redesigning the engine

I think it can be done by controlling the VANOS..

[all8up]

Originally Posted by ac2

I think it can be done by controlling the VANOS..

That drop off at the upper rpms is most likely the small turbos running out of their efficiency range.

[RiXst3r]

Originally Posted by shiv@vishnu

The second graph (with the top end roll off) is from a Steptronic car. In a Step car, the throttle closes abuptly in the last 300rpm before fuel cut to prepare for the next upshift which it will do regardless of whether you are in Sport mode using the paddle shifters or not.

-shiv

so the baseline 276/279 car was a steptronic...! nice.
if you compare the ones that cut throttle early (AT) to the ones that dont (mt) it looks like these are the baseline numbers...

AT's:
273/281
271/279
277/277
265/279
272/274
276/279
270/279

MT's:
268/273
266/270
259/272
271/279
266/278
264/281

are you sure all the ones that have top end roll off are AT's? they seem to have generally more power than the ones without top end roll off...





its nice to see auto tranny's finally getting close to the same power loss as the MT

[bmwzimmer]

Autos with sport package have that "roll off" towards the last 300rpms (6700-7000). Autos w/o sport packages have that roll off from 6400-6700rpm where the fuel actually cuts off at 6750rpms.
Manuals with sport package go up to 7K rpm with almost no roll off at 7K. Manuals w/o sport package seem to go only up to 6700 with no drop off either.

This is just my observation from reading all the various dyno graphs from day 1 that Shiv started posting here... I could totally be wrong on this....

[sstarch1]

Great work Shiv. As always, im quite impressed.

[redlinejunkie]

I like the first dyno graph in part 5. That car will pull pretty solid 2000 to 4000 rpm. It has the broadest torque curve of all of them

Lucky guy!!

[RiXst3r]

Originally Posted by redlinejunkie

I like the first dyno graph in part 5. That car will pull pretty solid 2000 to 4000 rpm. It has the broadest torque curve of all of them

Lucky guy!!

Ya, and its a steptronic!

[Longboarder]

Originally Posted by shiv@vishnu

My car did this with only 500 miles on it

[RiXst3r]

nice, good way to break it in!

[teknochild]

shiv were the autos dynod in third or 4th

[Terry335]

Does the sport package have a different PCM program??

[e36jakeo]

Wow Shiv, most of the tuned cars are gaining 45 HP. Your car with exhaust gained a bunch more (70 WHP or so, bringing the total to 348 WHP).

Is the exhaust making that big of difference? When might the exhaust be ready for production.

Did any of the LA cars mix in some 100 octane to make 93? Any dyno graphs of that??

THanks

[teknochild]

Originally Posted by e36jakeo

Wow Shiv, most of the tuned cars are gaining 45 HP. Your car with exhaust gained a bunch more (70 WHP or so, bringing the total to 348 WHP).

Is the exhaust making that big of difference? When might the exhaust be ready for production.

Did any of the LA cars mix in some 100 octane to make 93? Any dyno graphs of that??

THanks

i believe the dyno shiv did for the 350 was w/ 93 octane, so its kinda split between the exauhst and the gas

[Driver72]

Originally Posted by RiXst3r

so the baseline 276/279 car was a steptronic...! nice.
if you compare the ones that cut throttle early (AT) to the ones that dont (mt) it looks like these are the baseline numbers...

AT's:
273/281
271/279
277/277
265/279
272/274
276/279
270/279

MT's:
268/273
266/270
259/272
271/279
266/278
264/281

are you sure all the ones that have top end roll off are AT's? they seem to have generally more power than the ones without top end roll off...





its nice to see auto tranny's finally getting close to the same power loss as the MT

Your assumptions above are not correct.
I have a steptronic and my baseline dyno you have listed in the MT's category. Same with a few others that I know were with me there.

Most of the autos dynoed in the 260-270 hp and 270-280 tq range.
Most of the manuals dynoed in the 270-280 hp and 275-285 tq.

The manuals "usually" dynoed about 10 hp and 5-10 tq more.
Not that much too be honest.
Not sure if it's enough to make up for the speed of which the steptronic shifts.
It would be interesting to have 5-6 manuals do some "rolling runs" against 5-6 steptronics and see what the average results are.

[Driver72]

One more thing....
Shiv made it a point on several occasions that WAY too many people (including myself) worry too much about the "peak" numbers in a dyno sheet.

The "peak" number means very little.
It's a VERY small piece of the ENTIRE dyno graph and rpm range of the car.

One of the dyno results where a car might have a peak HP rating of 325 sounds a lot better than one of the cars whose peak number was 315.

However, that extra 10 hp might of just been a "spike" in power over just a 100 rpm range...but in the 2000 rpm leading up to it the car whose peak power was "just" 315 might of actually made just as much if not more power than the car which had the 325 hp peak spike.

Same goes with torque.
Shiv made it a point that you have to look at the COMPLETE dyno graph.
And laying the results on top of each other yields AMAZINGLY similar results for ALL the cars (auto to auto and manual to manual of course).

Lastly, I was surprised at how much the quality of GAS played into the results too.
This can "skew" what you see on the dyno.
One car in particular that was there when I was must of had a really bad batch of gas. He filled up with Mobil. Shiv dislikes Mobil.
This guys car (name intentionally withheld) made only 259 hp stock.
It was the lowest stock output. It was a steptronic coupe.
Then with the tune, his car was only making 300-305 hp and 330-335 tq.
Way low numbers. So low that Shiv could only conclude it was the Mobil gas.
So Shiv put 2 gallons of 100 Octane race gas into his tank to bring the Octane rating up to 92.
His car suddenly made about 316 hp and 348 tq.

The quality of gas makes a BIG difference.

I was quite happy with my numbers considering I too had 75% Mobil gas in my car. I wonder what my numbers and dyno would of been had I not had a majority of crappy Mobil in my tank and had Shell or Union 76 instead.
Break in miles also plays into these results. My car only had 1200 miles on it too (yet my baseline numbers were on the higher end of average for the steptronic), others had only 500 and some had 9000.
Obviously, the cars with 5K plus miles have a distinct "advantage" of having a more complete broken in engine, which we all know CAN and often DOES result in more power.

So, some people who had high numbers on the dyno day might just of had a great batch gas. And the people with slightly lower numbers might of just had a bad batch of gas or used a "cheap" gas.

Those numbers could easily reverse with a fill up or two of better gas.

Basically, given the degree of different gases and such, some variance is expected. And ALL the cars tuned results fall within the variance of the gas they MIGHT of had in their cars.

The PROcede is therefore amazingly consistent with all the cars...given the parameters of gas variance.

On any other given day with different gas, the guys who got slightly lower numbers might later be the guys with higher numbers and vice versa.
All being equal the results are pretty much exactly the same for every car.
All I've got to say is I'm extremely happy with my car.
It doesn't feel "tuned" it just feels like a MUCH stronger stock car.
The increase in power in noticable everyone and VERY smooth and consistent. The car just LEAPS forward, especially in the 3000-5000 rpm range.

[RiXst3r]

Originally Posted by shiv@vishnu

The second graph (with the top end roll off 276/279) is from a Steptronic car. In a Step car, the throttle closes abuptly in the last 300rpm before fuel cut to prepare for the next upshift which it will do regardless of whether you are in Sport mode using the paddle shifters or not.

-shiv

Is the graph that shiv said is a steptronic not a steptronic?

[oc24]

So on gas quality, Shell/76 are the best kinds? I always thought Chevron was the best. Maybe I fell for the techron marketing scheme...