View Full Version : New Turbo mod and my worries...
Hi all, I just got my car from my mechanic. My ibiza now has a K03sport fitted and a samco intake pipe to go with it.
My first impressions are WOW! I didnt expect this much extra pull without changing the Revo SPS1.
I am worried though...
1) I am seeing alot of pressure, I am getting about 1.65bar spike and it holds 1.5bar up to 5000rpm !!! Isn't that tooo much??? I dont want it to explode in my face... My mechanic said that the ECU will adapt and will lower the pressure and that it is the N75J that is giving the high spike. If not he will cut some pressure from the wastegate...
2) Are my injectors up to it??? At what capacity are they running at now??? Do I need to upgrade to larger ones?
3)Finally, is the revo sps1 rich enough for the new turbo or will I be running too lean a mixture?
Please help me put my mind to ease...
Shock_Xe
02-03-2004, 23:13
after having the k03s fitted myself and mapped recently heres what i was told
The Revo software would run lean top end/higher revs as the K03s is pushing more air with less fuel being supplied
The injectors are good for 250bhp at 90% duty cycle
To get decent fueling over 230bhp you would need a 4bar fpr and map to suit
I run at 1.45bar max, Mike at Jabba said anything more retared the fueling & timing & ignition etc so you are boosting too much too see a benefit. Possibly a loss in power.
So you got underfueling due to more air than program was designed for, running a 3 bar fpr only and ECU will be reducing fueling/retading timing due to higher boost pressures and heat
Also the injectors run around 280cc on 3bar fpr and around 305cc on 4 bar fpr
hope this helps
Mike
I think you will run lean due to the map being for a turbo supplying less air, and the injectors/FPR not being able to deliver the required fueling. Running lean is BAD, VERY BAD.
If I were you I'd take it easy and get down to Jabba ASAP.
Or you could goto your local tuning place and get them to put in on a rolling road, and use a wideband lambda probe to check your fuel/air ratio.
Ben
yeah - just pop to peterboghorror from athens...
Originally posted by m0rk
yeah - just pop to peterboghorror from athens...
:D Sorry, I didn't look at the location! :hammer:
Hmmm, maybe you can get Jabba to send you a FPR and a chip from a similar car they have done. Or are there other tuners out there that will do it?
Cheers
Ben
Thanks for the info guys, I went today and cut down boost from the wastegate to 1.5bar max. I am planning of getting an Apexi Halmeter connected to the lambda and doing some runs on the road.
Also i will have it dynoed and if it comes out less than 230bhp (which it probably will without a new chip) the 3 Bar FPR should be ok...??? And if it reaches that power the injectors should bo ok too (as Mike said).
So all is good I hope... (For now until i get it properly done)
Cheers
Thanos
Jabba could post a ecu with the jabba chip already in there or send him your ecu with a list of your modds and see what ha says.
I dont think it would be very practical sending by ECU overseas and being without my everyday car for such a long time... :(
At the moment here is what I have done...
After cutting down the pressure to 1.5bar max all is good so far exept one thing. At high revs (5000+rpm) while the boost has stayed at around 1.2 bar I see the needle of the boost gauge drop to 0.6 instantly, go back up to 1.2-1.3 bar and then down again. It does not seem similar to limp or safe mode.
My mechanic said it is the N75j which is causing this. I changed to my original N75 C but dont like it at all as it doesn't keep up the pressure long enough... It has rectified the problem I described earlier though.
Is it worth trying the N75 H??? Would that perform similarly to the J but without the problem??? Or would it be a waste of time and money???
I have seeked the advice of revo as well and they suggest putting back the wastegate to its original settings and change through an SPS3 the pressure and timming to find the best combination bor the car and see how it reacts...
As far as the N75 H goes, Revo Kev said its a try it and see what happens situation...
Shock_Xe
07-03-2004, 15:39
Originally posted by taglo
I dont think it would be very practical sending by ECU overseas and being without my everyday car for such a long time... :(
At the moment here is what I have done...
After cutting down the pressure to 1.5bar max all is good so far exept one thing. At high revs (5000+rpm) while the boost has stayed at around 1.2 bar I see the needle of the boost gauge drop to 0.6 instantly, go back up to 1.2-1.3 bar and then down again. It does not seem similar to limp or safe mode.
My mechanic said it is the N75j which is causing this. I changed to my original N75 C but dont like it at all as it doesn't keep up the pressure long enough... It has rectified the problem I described earlier though.
Is it worth trying the N75 H??? Would that perform similarly to the J but without the problem??? Or would it be a waste of time and money???
I have seeked the advice of revo as well and they suggest putting back the wastegate to its original settings and change through an SPS3 the pressure and timming to find the best combination bor the car and see how it reacts...
As far as the N75 H goes, Revo Kev said its a try it and see what happens situation...
is it possibly that the ecu is winding back boost as it not providing ample fuel for the extra shift of air?
Originally posted by Shock_Xe
is it possibly that the ecu is winding back boost as it not providing ample fuel for the extra shift of air?
Could be... That is why I am after a N75 H which if I am guessing correctly will have lower boost levels that the J version and might stop the loss in boost at high revs...??? :confused:
I wish I new...:hammer:
Shock_Xe
07-03-2004, 19:04
Originally posted by taglo
Could be... That is why I am after a N75 H which if I am guessing correctly will have lower boost levels that the J version and might stop the loss in boost at high revs...??? :confused:
I wish I new...:hammer:
The H Does give a Massive initial spike tho!!! Had one myself. Why dont you put the standard F version on as u hiiting enough boost
"F" ??? Mine had the "C" version to begin with...
Shock_Xe
08-03-2004, 15:23
Originally posted by taglo
"F" ??? Mine had the "C" version to begin with...
The C Version is no longer available/in production and has been replaced/superceeded with the F Version
Just switched to the N75 H version and I am VERY HAPPY!!! :cheers:
It holds a bit less pressure than the J version at high revs and the ECU is not cutting back pressure anymore !!! :spin:
I am getting it dynoed soon to see how my curves are doing... :p
a friened of mine runs a turbo like yours on his ibiza , but he runs on 360cc injectors from the tt 225.
he peaks 1.8 and holds 1.3+ at 6000 , and yes he is nuts :cheers: