[JOe335i]

Alright just was wondering after looking at a couple dynos and results on 1/4 mile performance.

X-tune
Downpipes
FMIC
93 octane
stock intake
stock exhaust

X-tune
100 octane
stock intake
stock exhaust

conditions would be 40*F.

just comparing the power and on a 1/4 mile a est of what each would run, given equal conditions/drivers with the stated sepcs.

thanks

[Sniz]

I think the results will be pretty similar. I know my car feels MUCH stronger on race gas vs pump.

[JOe335i]

Originally Posted by Sniz

I think the results will be pretty similar. I know my car feels MUCH stronger on race gas vs pump.

Yea i get the exact same feeling. was just wondering since i had that feeling.

would they dyno close to the same WHP, and would they be identically the same in speed on the track or on the street.

[M.A.C.K.]

ummmm I dont know about this........

I ran a 335xi (v80 and pre 29.2) the other night with JBX on str8 100 octane and he had DCI, running 16-17 psi on his boost gauge.........

I am a 335i (v81 and 29.2+) with JB3 1.1V on 93 octane, with FMIC, DCI, catless DP's.....


I walked the kid with the JBX from a roll (he wanted to go from a roll)........and on my usual 100 octane it would of been murder....

I think the FMIC and DP car will win out, because you only gain max 15whp with the race gas (100 octane)

[JOe335i]

thanks for the comparison MACK, but a XI weight and extra AWD lost isnt a fair comparison, hence my comparison with different tunes aswell.
but thanks for that.

[M.A.C.K.]

Originally Posted by JOe335i

thanks for the comparison MACK, but a XI weight and extra AWD lost isnt a fair comparison, hence my comparison with different tunes aswell.
but thanks for that.

Weight doesnt matter when you are running at 70 mph plus when we were doing the runs..........also his tune produces more boost which equals more power than my JB3......

[5soko]

i would say it would be close, but the DP car might edge it out, but not by alot.

100 octane over 93 is about 10WHP i would guess and in that weather maybe less, not sure.

[jpsimon]

You guys are throwing around some low numbers... I gained 19awhp / 23awtq from 93 to 100 octane on the same map - no adjustments at all

[5soko]

Originally Posted by jpsimon

You guys are throwing around some low numbers... I gained 19awhp / 23awtq from 93 to 100 octane on the same map - no adjustments at all

WOW! jp that is awesome.

so what would you say for the scenario here?
how much did u gain from the DP?

im interested since im almost in the same position


p.s. shiv mentioned this once i.e. e90aw335i DP dyno, but a car with the stock exhaust system and DP is really bottlenecking the system. e90aw335i gained about 5-10WHP from his DP alone setup withs tock exhaust. he did gain a lil faster spool and a bit better throttle response.
a FMIC with no intake or such, might gian a little more power but will jsut keep the cool power there longer.

i say its gonna be very close.

[jpsimon]

I gained at least 20-30whp... I don't know what was wrong with his car but going completely catless gives you much more than "5-10whp". The only dyno i have of my car with just the piggyback (PROcede v2 at the time) was from a dyno dynamics dyno (that reads low)... so the comparison isn't great but at least you have something...

PROcede V2 only 327awhp / 365awtq (dyno dynamic dyno) vs. PROcede V3 + catless (dynojet) 366awhp / 370awtq

[5soko]

When you say completly catless do you mean full exhaust with no cats, since he ran with DP's with the stock exahust.

[jpsimon]

Originally Posted by 5soko335i

When you say completly catless do you mean full exhaust with no cats, since he ran with DP's with the stock exahust.

yeah i mean completely catless, but the main bottleneck is the downpipes... anyways thats the only comparison i got for you on my car

[5soko]

Originally Posted by jpsimon

yeah i mean completely catless, but the main bottleneck is the downpipes... anyways thats the only comparison i got for you on my car

thanks i apprecaite it. so im gonna guess like shiv said, the stock exhaust is def. bottlenecking the DP's full potential, hence the 5-1-WHP gain from e90aw335i with jsut DP and stock exhaust.

umm so this race would be interesting.

[down4it]

Originally Posted by M.A.C.K.

Weight doesnt matter when you are running at 70 mph plus when we were doing the runs..........also his tune produces more boost which equals more power than my JB3......

Why would weight not matter at 70mph? Also dont forget with an Xi it losses more power to the tires than an I because it has to turn all 4 wheels all the time...

[ZJP]

Originally Posted by down4it

Why would weight not matter at 70mph? Also dont forget with an Xi it losses more power to the tires than an I because it has to turn all 4 wheels all the time...

+1

weight always matters.....

[JOe335i]

umm interesting, so with 100 octane in 40*F weather, it should re-gain the power of a bottleneck DP's with stock exhaust, and a FMIC with no intake?

sounds about right. anyone else?

[Driver72]

I say DP with FMIC car takes the win.
Do several (3 or 4) runs back to back and the FMIC will really come into play and that car will win by 3+ CL's from 40-120

[JOe335i]

interesting point of view.

i think the 100 octane will eclipse the DP with stock exhaust power and a little of the FMIC power, but like you did mention a upgraded FMIC will hold peak power for longer during the more runs since it cools better.

so it almost comes down to

x-tune
FMIC

vs

X-tune

since the 100 octane cancels out the DP's with the stock exhaust system.

how much of a extra bump in power can FMIC give? how much can adding a FMIC add in a drag race?

[Sniz]

Originally Posted by Driver72

I say DP with FMIC car takes the win.
Do several (3 or 4) runs back to back and the FMIC will really come into play and that car will win by 3+ CL's from 40-120

back to back runs or especially on a road course the FMIC equipped car will perform better. For 1 single run, well maybe we should find out!

[Driver72]

Originally Posted by JOe335i

interesting point of view.

i think the 100 octane will eclipse the DP with stock exhaust power and a little of the FMIC power, but like you did mention a upgraded FMIC will hold peak power for longer during the more runs since it cools better.

so it almost comes down to

x-tune
FMIC

vs

X-tune

since the 100 octane cancels out the DP's with the stock exhaust system.

how much of a extra bump in power can FMIC give? how much can adding a FMIC add in a drag race?

I know there's a few dynos out there with the FMIC added.
Most recently Terry added the Code3 to his 135i
I can't remember what he got but IIRC he gained like 10-15 rwhp on a dyno from just that.

Now if this was a 100 Octane vs 91 Octane with DPs/FMIC I'd say it would be a bit closer.
But on a tuned car 93 Octane gives 6-8 rwhp over just 91.
I think the 100 Octane is worth 15+ over 93.

The catless DP's are worth at least that.
On some people's dynos they gained 30+ rwhp from the catless DP's alone.

But just do the run and let us know.
Be sure to do at least 3 back to back to so we can see the effects of the FMIC as well.