DTA S80 PRO on 5 cylinder

[gnutz2]

Sorry to jump in here, I have read the post but a while ago so sorry if I'm repeating somebody else.

I'm from the fiat coupe 20 valve turbo back ground but I always look in on you guys because tuning wise there not to different plus I always loved the s1 and 2's.

Anyway abit of info from what I've found is many standalone ecu's don't have a dedicated 5 pot set up there mostly running as v10 but only utilise half the banks which from what I've been told isn't the best and also can slow the ecu down depending how many extras functions you use ie ALS and launch control etc.

As a forum we found a guy that had manage to map are 5 cylinder to almost perfection ie drives like a factory car but with a lot more power but he always said that a dedicated 5 pot map would be a lot better but the company wasn't willing when he had asked for one. With the amount of custom from us he had and the amount of nagging he gave they bucked and ended up doing a dedicated 5 pot set up for him and the results have been very promising.

The ECU is DTA and most of use use the s80 pro

Anyway just thought I'd let you know that dta have brought one out but I don't know how many people that are using dta are running 5 pot or v10 based maps.

I can put his details up if anyone is interested


I'm no mapper so this info is from word of mouth about other ecu's

Happy tuning

Thanks for the heads up Knight I never actually botherd looking for any updates because there's not any problem running in wasted spark. Now ive seen it, V29 http://www.dtafast.co.uk/news/latest_news.shtml#V29. Quite an old update, im on 68 now so could go ahead and fit a cam sensor and run sequential. But do i need to? As far as im aware this would half the ammount of times the coils fire and give me another sensor to go wrong.

Its a great thing that DTA have recognized our engines worthy of a dedicated setup but for now ill stick with wasted.

Cheers.

[knight7660]

Standalone

Sorry to jump in here, I have read the post but a while ago so sorry if I'm repeating somebody else.

I'm from the fiat coupe 20 valve turbo back ground but I always look in on you guys because tuning wise there not to different plus I always loved the s1 and 2's.

Anyway abit of info from what I've found is many standalone ecu's don't have a dedicated 5 pot set up there mostly running as v10 but only utilise half the banks which from what I've been told isn't the best and also can slow the ecu down depending how many extras functions you use ie ALS and launch control etc.

As a forum we found a guy that had manage to map are 5 cylinder to almost perfection ie drives like a factory car but with a lot more power but he always said that a dedicated 5 pot map would be a lot better but the company wasn't willing when he had asked for one. With the amount of custom from us he had and the amount of nagging he gave they bucked and ended up doing a dedicated 5 pot set up for him and the results have been very promising.

The ECU is DTA and most of use use the s80 pro

Anyway just thought I'd let you know that dta have brought one out but I don't know how many people that are using dta are running 5 pot or v10 based maps.

I can put his details up if anyone is interested


I'm no mapper so this info is from word of mouth about other ecu's

Happy tuning

[dspl1236]

It's a work around no doubt
.... if you want to run it sequential: set it up as a 6cyl with uneven firing order and then set the 5 first cylinders with 144degrees spacing and nr 6 somewhere between 576 and 720.

took a few days off to work on my 20vt

if this is set a 6cyl.....wouldn't the cam sensor be looking for 1 window 6 times before it reset starts over? should i have a 5 window cps?

also if going to sequential i would have to rewire the injectors and coils back to the factory firing order...correct?

many thanks in advanced

[Audi_CQ]

its at 64* . I may have to mod/ditch the 034 bracket.

Just enter 64 as value in sensor position
4 degrees isn't the problem anyway so problem has to be something else.
All other settings is as stated in manual with coil on plug off and so on?
Checked that you've got spark on all cylinders and that all injectors open?

A bit OT, but I would recommend setting the RPM values closer at lower revs if it is to be used on the street.

[dspl1236]

its at 64* . I may have to mod/ditch the 034 bracket.

[Audi_CQ]

Have you checked sensor position? Is it at 60degrees?

[dspl1236]

It snap crackles and pops but no fire. i also noticed my 034 60-2 pulley/trigger does not line up in the middle of the vr sensor using the 034 supplied bracket. i am getting 2-3 "crank wheel teeth errors" and 1-2 "sync errors" while cranking, but i read could be normal during crank....

any suggestions for a first fire map on 3b injectors?

[Audi_CQ]

Okay, 5 x 144 = 720 and 10 x 72 = 720. What I wasn't factoring was every second coil firing was a wasted spark. Seems like a "work around" rather than the more direct approach that the OE ECU or even VEMS uses with spark only every 144 degrees.

Thanks

It's a work around no doubt
The newer S series DTA ecu supports 5 cyl sequential as motronic and VEMS and others.
The old P8pro has another work around if you want to run it sequential: set it up as a 6cyl with uneven firing order and then set the 5 first cylinders with 144degrees spacing and nr 6 somewhere between 576 and 720.

[Jamo]

To me it seems a sh*t solution but if it works it works

[UrS4boy]

Now why didn't someone post that earlier so on 1st cycle 1, skip 5, 2, skip 3, 4, skip 1, 5, skip 2, 3 giving 12453 firing order

Exactly. Seems everybody is right. BUT the real firing order, at the end of a compression stroke, is, as must be, 1-2-4-5-3.

[UrS4boy]

Okay, 5 x 144 = 720 and 10 x 72 = 720. What I wasn't factoring was every second coil firing was a wasted spark. Seems like a "work around" rather than the more direct approach that the OE ECU or even VEMS uses with spark only every 144 degrees.

Thanks

[Jamo]

Now why didn't someone post that earlier so on 1st cycle 1, skip 5, 2, skip 3, 4, skip 1, 5, skip 2, 3 giving 12453 firing order

[gnutz2]

Right, a v10 fires every 72deg regardless of firing order.

Us DTA lads set the ecu to 10 cylinder in the engine settings, now the ecu triggers the coils every 72deg.

Our I5 engines fire every 144deg, but this means they hit TDC every 72deg, and what happent inbetween every compression stroke on a 4 stroke engine?

An exhaust stroke.

If you follow the full engine cycle, this happens

0deg = No1 cyl = Compression = Real event
72deg = No5 cyl = Exhaust = wasted
144deg = No2 cyl = Compression = Real event
216deg = No3 cyl = Exhaust = wasted
288deg = No4 cyl = Compression = real event

At this point no cam is triggerd so it resets to zero

0deg = No1 cyl = Exhaust = Wasted
72deg = No5 cyl = Compression = Real event
144deg = No2 cyl = Exhaust = Wasted
216deg = No3 cyl = Compression = Real event
288deg = No4 cyl = Exhaust = wasted

I cant think of any simpler way of putting it

[UrS4boy]

Did I say it was half an Audi V10? You must imagine a V10 made up of to I5's
Or put it this way: If running half an Audi V10 as a I5 it would have 15234 as firing order

All that says is the an Audi V10, made up of two I-5 banks, does NOT NOT NOT have the same firing order for its left (1-2-3-4-5) cylinder bank as the 20VT 3B, AAN, ABY or ADU.

[Audi_CQ]

The Audi V10 has two five cylinder banks, e.g. Left = 1,2,3,4,5 and Right 6,7,8,9,10 (correct me IF I am wrong).

The firing order is 1-6-5-10-2-7-3-8-4-9

Every second cylinder of the *V10* is 1-5-2-3-4.

I don't see how you can take this yet another level of "skipping".

Did I say it was half an Audi V10? You must imagine a V10 made up of to I5's
Or put it this way: If running half an Audi V10 as a I5 it would have 15234 as firing order