Big Turbo users. Rought idle or Smooth idle?

[hootyburra]

Sorry for my spelling.

Please list your
Tune:
Fueling:
Maf/Mafless:
Emissions delete:
Distance of o2 from turbo:
Stock TB/ IM:
Any tweaks through lemmiwinks/unisettings

Edit, Great info coming in so far.
The reason behind this is to try and clear up a few suspicions.
One of the main ones being the dekka 630's spray pattern doesn't match up with our cars.
I have read numerous reports of people switching to genesis 550's @ 4bar and everything being better... I have also read of this doing nothing.

Please post if you are on a base tune or maestro or a custom tune...
If the idle was rough what corrections you made.

[Zneith]

Please list your
Tune: Eurodyne 630cc Mafless File
Fueling: 630cc Siemens Injectors (ECS spacers)
Maf/Mafless: Mafless
Emissions delete:Cat delete, all emissions rail is intact minus the n249 bypass
Distance of o2 from turbo: 20 inches (A/F Gauge)
Stock TB/ IM: All stock, including motor
Any tweaks through lemmiwinks/unisettings: No tweaks in here, still looking at some Maestro stuff.

[DanA4]

Tune: Maestro. Base 630 file
Fueling: Siemens 80# injectors and 044 Bosch intank
Maf/Mafless: Mafless
Emissions delete: everything.
Distance of o2 from turbo: <16in
Stock TB/ IM: yes
Any tweaks through lemmiwinks/unisettings: none.

Used Maestro to adjust the injector constant and some O2 corrections

[EURidahO]

Smooth until my oil blowby kills my o2 sensor, then it's rough till I fix it.

Please list your
Tune: Unitronic 630cc
Fueling: Siemmens 630cc, 3bar fpr, stock pump
Maf/Mafless: Mafless
Emissions delete: Yes
Distance of o2 from turbo: Stock location so ~30"?
Stock TB/ IM: Stock

[screwball]

Tune: Eurodyne 630cc Mafless File
Fueling: 630cc Siemens Injectors
Maf/Mafless: Mafless
Emissions delete:Full deletes, evap plugged in and AWP tensioner installed in AEB head
Distance of o2 from turbo: 20 inches (Primary O2 Sensor)
TB/ IM: RMR big port w/ 70mm TB
Maestro Tweaks: 20% bump in main fuel, 2.25* timing added, Alpha N / Inverse table are matching

[Boosted96GSX]

2000 GTI 1.8T
Tune: Unitronic 630cc
Fueling: Siemens Deka 630cc, 4bar FPR, APR drop in fuel pump
Maf/Mafless: Mafless
Emissions delete: Deleted
Distance of o2 from turbo: about a foot
Stock TB/ IM: Yes/ TT IM (I believe it flows the same though)
Any tweaks through Unisettings: To get my idle smoother, I had to raise up the idle closer to 1k rpms. I think through vag-com it says i'm at about 920-960 rpms.

Also I do have an exhaust leak right before my main 02, so after I get that fixed this week, I will try and lower my idle back down while keeping a smooth idle.

[ghettojetta20vT]

Rough idle but have since fixed. Turned out the car doesn't like the siemens 630cc's. Switched to genesis 550cc and 4bar FPR and it's smooth like stock.

Please list your
Tune: unitronic 630 file
Fueling:genesis 550's with 4bar FPR
Maf/Mafless: mafless
Emissions delete: everything deleted
Distance of o2 from turbo: not sure
Stock TB/ IM: SEM intake manifold
Any tweaks through lemmiwinks/unisettings: no tweaks

[One-Eight GTI]

Please list your

Tune: Eurodyne 870cc
Fueling:870cc inj
Maf/Mafless:Maffless
Emissions delete:Yes but all resistored
Distance of o2 from turbo:Factory distance
Stock TB/ IM: Stock for now have got SEM and 70mm waiting to install this summer
Any tweaks through lemmiwinks/unisettings Nope, just base tune for now


Once I get my car back together will play with Maestro a bit to see if I can get idle better, all the above info was for last summer, things will be better hopefully this summer since I plan on driving to NY to visit Al and have him help me out and show me a few things with Maestro

[Big_Tom]

Please list your

Tune: Eurodyne 630cc
Fueling:siemens 630cc
Maf/Mafless:MAFLESS
Emissions delete:Yes
Distance of o2 from turbo:Factory distance
Stock TB/ IM: yes
Any tweaks through lemmiwinks/unisettings Nope, just base tune

only problem is rough idle

[Vegeta Gti]

Tune: uni 630cc
Fueling: 630cc
Maf/Mafless:mafless
Emissions delete:ALL
Distance of o2 from turbo:26 inches
Stock TB/ IM:SEM/80mm

[Vegeta Gti]

best tweak for idle with SEM and large tb is go down to torque whatever..and add +1 or 2..helps alot..smooths it out a bit..

[BlueSleeper]

Tune: Motec, Self steady state tuned
Fueling: Low Imp RC Eng 1400cc (used to have the deka 630's and didn't have a prob
Maf/Mafless: Mafless
Emissions delete:No emissions hardware but flanged exhaust to swap in cat quickly
Distance of o2 from turbo: 24 inches
Stock TB/ IM: Stock Throttlebody
Any tweaks through lemmiwinks/unisettings: No limmiwinks
Can idle down to around 400 rpms pretty nicely, but the VF mounts make it shake like crazy.

[transient_analysis]

Tune: Uni 630cc, for CAMS, intake mani & RS4 throttle
Fueling: 630cc Siemens Injectors
Maf/Mafless: MAF
Emissions delete:SAI delete, CAT installed
Distance of o2 from turbo: stock location + ~ 25"
Stock TB/ IM: RS4 throttle, 007 mani
Any tweaks through lemmiwinks/unisettings: None

I had the occasional lumpy idle, but for the most part it runs fine. The lumpyness feels like a minor leak in the intake tract (although I've done plenty of pressure tests to rule that out).

I wouldn't be surprised if the 630 Siemens are a bad spray match for our cars, but I've yet to see another 630cc injector suggested that's better.

[VRsick13]

Ive been wanting to ask this question. So instead of making a new thread I thought I'd ask in here.. I have a rough idle and my vac is at -19. when i rev it up 100-200 rpm the idle is fine and vac is -23. My cold start ups are sometimes a b**** also.


Tune: uni 630cc
Fueling: siemens 630cc
Maf/mafless: mafless
Emissions delete: everything
Distance of o2 from turbo: it's the cts kit, I'm not to sure,
TB/IM: stock tb, abd intake manifold

[isaacblaylock]

Tune: Eurodyne 630cc Mafless File
Fueling: 630cc Siemens Injectors, stock fuel pump (its a 225TTQC)
Maf/Mafless: Mafless
Emissions delete: no cats, all the deletes emission-wise
Distance of o2 from turbo: factory
Stock TB/ IM: stock
Any tweaks through lemmiwinks/unisettings: base Maestro with a few degrees of timing added

had uni idle was teeerrrrrible, switched to maestro idles well sometime when idling for a long light or for a good time it jumps but corrects itself s

[CupraDR]

Idle smooth

Tune: Revo Stage 3 running with BWS256
Fueling: 550cc Genesis Injectors, with Bosch Inline Pump
Maf/Mafless: Maf
Emissions delete: no cats, 3" wide open
Distance of o2 from turbo: 4 inches
Stock TB/ IM: stock

[Vegeta Gti]

let me put more details in mine.

Tune: uni 630cc base file for 30r with 80mm tb
Fueling: 630cc
Maf/Mafless:mafless
Emissions delete:ALL
Distance of o2 from turbo:25 inches
Stock TB/ IM:SEM/80mm


i have a built and worked AEB head...i also have 3651 cams paired with my port matched SEM/80mm tb. 3071r with port matched treadstone manifold.

no issues with idle from day one. as i added sem, cams,head,etc it got better..which i thought was impossible..now it just purrrssssss..it was liek stock before now you can tell it's all pissed off. i am currently on the 3 year old basetune, no tweaks

[hootyburra]

Great info so far

[BlancoNino]

Tune: 630cc Unitronic circa April 2009
Fueling: 630cc Siemens/Deka
Maf/Mafless: MAFless
Emissions delete: Secondary Air/EVAP/Standard PCV
Distance of o2 from turbo: Normal placement in the 2nd piece of ATP downpipe (~15")
Stock TB/ IM: Stock TB/IM
Any tweaks through lemmiwinks/unisettings: None so far...

All emissions deletes are resistored, so fuel adaptation is retained. Idles @900rpm with a hiccup every 30 seconds...sometimes experience rough idle in HOT weather/traffic. Cold starts are perfect and car runs flawless otherwise.

[hootyburra]

What about part throttle driving? Is it smooth or jerky... best way I can describe is the a/f gauge goes back and forth across the spectrum and you can feel some kind of stutter in the car..

[BlancoNino]

occasional jerk if i let off after a part throttle spool cold, otherwise no hesitation at all cruising at half throttle.

[VRsick13]

Got a turbo XS Mbc and part throttle is very smooth.

[AL@PagParts.com]

Going to be modifying and testing some EV14 (Bosch 550) injectors for these cars. The injectors are way more advanced and of a higher quality then the usual 630cc Siemens Dekas. Every single setup I've used these on, its butter stock-like. They can be had in 650, 750 and 910/1000cc as of now w/ the appropriate hardware for a direct swap. Even a 996TT w/ Maestro using the bigger set actually idles better then stock. From what I've seen, the quality on the Deka injectors are somewhat questionable

[hootyburra]

Going to be modifying and testing some EV14 (Bosch 550) injectors for these cars. The injectors are way more advanced and of a higher quality then the usual 630cc Siemens Dekas. Every single setup I've used these on, its butter stock-like. They can be had in 650, 750 and 910/1000cc as of now w/ the appropriate hardware for a direct swap. Even a 996TT w/ Maestro using the bigger set actually idles better then stock. From what I've seen, the quality on the Deka injectors are somewhat questionable

Thank you for the feedback. And insight.
If you need I test dummy for the injectors please pm me.

[Zneith]

Going to be modifying and testing some EV14 (Bosch 550) injectors for these cars. The injectors are way more advanced and of a higher quality then the usual 630cc Siemens Dekas. Every single setup I've used these on, its butter stock-like. They can be had in 650, 750 and 910/1000cc as of now w/ the appropriate hardware for a direct swap. Even a 996TT w/ Maestro using the bigger set actually idles better then stock. From what I've seen, the quality on the Deka injectors are somewhat questionable

+1 good insight & info

[steve-o 16v GLI]

Tune: reflex tuning obd1 conversion kit, c2 motorsports chip
Fueling: 440cc green tops
Maf/Mafless:maf
Emissions delete:ALL
Distance of o2 from turbo:guessing at least 24 inches
Stock TB/IM: stock IM/obd1 2.0l throttle body
turbo setup: Cts/kinetic turbo kit. t3/t4 50 trim .63ar
Its only been a couple weeks since Ive gone bt, but the car has ran an idled smooth since the first time it was started back up. Once I get rods done Im switching to obd2 and 630cc.

[Big_Tom]

Going to be modifying and testing some EV14 (Bosch 550) injectors for these cars. The injectors are way more advanced and of a higher quality then the usual 630cc Siemens Dekas. Every single setup I've used these on, its butter stock-like. They can be had in 650, 750 and 910/1000cc as of now w/ the appropriate hardware for a direct swap. Even a 996TT w/ Maestro using the bigger set actually idles better then stock. From what I've seen, the quality on the Deka injectors are somewhat questionable

thanks! i guess i better start saving for new injectors will i have to get my ecu reflashed again?

[Big_Tom]

also on page 9 of http://forums.vwvortex.com/showthrea...1#post70838994 thread 2 people have changed injectors and the problem still exists... so what happens when/if i buy the new bosch injectors and the problem is still there? i have a weird feeling new injectors will not fix the problem and i will be out of an extra 250-275 on top of whats already been lost on fixin stuff that wasnt broken like i said before i have seen the 630cc's run in everybody else's car but mine.

[screwball]

Bumping up my idle torque to 3 or 4 in Maestro's really cleaned my idle up. I got my exhaust leaks under control several weeks ago, but I'm only really getting to play with Maestro more now.

[1.8t Alpine GTI]

Tune: Revo stage 3
Fueling: 550cc injectors / cis audi fp
Maf/Mafless: maf
Emissions delete: no airpump etc
Distance of o2 from turbo: right before cat
Stock TB/ IM: yes

very smooth idle

[hootyburra]

Bumping up my idle torque to 3 or 4 in Maestro's really cleaned my idle up. I got my exhaust leaks under control several weeks ago, but I'm only really getting to play with Maestro more now.

Going to change the torque in uni-settings and see what happens

[Big_Tom]

Going to change the torque in uni-settings and see what happens

10-4 i dont have unisettings

[hootyburra]

10-4 i dont have unisettings

You can download it for free just google it. Connect with the cable you use for vag cam

[Zneith]

10-4 i dont have unisettings

Lemme know if you cant find it, i can email it to ya

[Nevaeh_Speed]

Revo Bt 550cc File
Genisis 630cc on 3 bar w/ walbro 255lph pump (soon snow performace water meth)
1.8t maf in 3" housing
Stock emission (no cat)
14-16"
Hemi 80mm TB/USRT manifold
Tweeks done with lemmiwinks but nothing major.


Pretty smooth idle, car has a hickup every now and then.