there is a herrod dealer there from memory see them might be the way to go or imo leave it and see what the edit do's?

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yeah there is a Herrod dealer here but hes a fair way from where I live. I also wonder if im only going to run the 8 psi option weather I just do the valve springs?

Yeah its a bit of a problem being here when it comes to new technology. Just need to work out what Im best to do and who to do it when I get the stealth

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Just do what any other K1W1 would do......

Move to OZ

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Naa mate NZs a great place

Gavin, If your getting bigger injectors you may want to consider upgrading your fuel pump as well. The injectors will only flow as much fuel as the pump will deliver. You wouldn't want the engine to run too lean......

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nah dude, APS reckon the factory pump is good for at least 280rwkw aka Phase 2 power, Nizpro reckon the factory pump is good for even more!!

Dave.

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I have heard that as well.

Gavin, my dealer fitted the Nizpro valve springs I supplied at my 30k service for $200.

All up the whole valve spring upgrade cost me $480, where everyone else quoted $800 fitted and only $150 discount if I supplied the springs.

Gavin, my dealer fitted the Nizpro valve springs I supplied at my 30k service for $200.

All up the whole valve spring upgrade cost me $480, where everyone else quoted $800 fitted and only $150 discount if I supplied the springs.

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Gavin, my dealer fitted the Nizpro valve springs I supplied at my 30k service for $200.

All up the whole valve spring upgrade cost me $480, where everyone else quoted $800 fitted and only $150 discount if I supplied the springs.

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Hey JB

what dealer did you use. Thanks

Ok, I will be upgrading valve springs before I get the stealth but dont need to upgrade the fuel pump for the 8 psi option.

The thing that has popped into my head is that if you put bigger injectors on the engine in order to run the stealth properly you need to get the car tuned to the injectors.

So, I take it that if you wanted to get your car serviced (or any other reason you might want to go back to factory I.e re sale) and re program the stealth back to factory mode the car isnt going to run very well with the bigger injectors?

My other question is, The lads that are using the 8 psi option, how are you finding the injection side of things if you are using standard injectors combined with the 8 psi option?

Edited January 4, 200521 yr by Gavin Conroy

Gavin

There is plenty of info in these threads about the SCT/CAPA/Stealth product and I suggest you may be best reading through them to answer your questions in detail from the people involved in the original development of these maps.

The short answer is that the maps provided have been specifically designed to run on a completely standard engine package. Therefore, there is no need to run anything non-standard to achieve the results quoted for the 8psi and 10psi map (some unfortunate souls excluded).

From my own experience; I have an aftermarket exhaust and find this has not caused any troubles with the maps and particularly seems to help with the 10psi map (remembering the the boost is electronically controlled in these engines; so the exhaust backpressure differences do not effect boost levels/tune of the engine as much as you may think - hence there being little point of doing an exhaust unless you are aiming for much higher power levels).

Running injectors and additional parametre changing components will require a customised tune (ie the generic 8 and 10psi maps will not be suited to this kind of modification without further tuning to suit the different components).

As for valve springs; I suppose there is different quality and tolerances out there so my personal experience may not be the same for everyone. Having said this I have not noticed any problems running the 10psi map with stock springs - mind you the boost levels do taper off at the top end where combustion pressure would otherwise be greatest on the valves (given the tuning employed to keep the A/F ratios acceptable with the injectors maxed out around 4500rpm I believe). So maybe it is the best of both worlds in that no changes are nessecary to run at that spec. If any changes were made - less restrictive air intakes would probably produce the best bang for buck with using the generic 10psi map (this is just my theory from driving my currently standard intake arrangement which I feel is choking the engine somewhat on the 10psi map in certain conditions). Some before and after dynos and driving will hopefully prove my hypothesis in time to come

Good luck with the edit if you get it and keep us all posted how it goes!

Thanks a lot for that.

That answers all of my questions. I had looked through a few threads and they had tended to go off the subject a fair bit and I was really interested to hear from guys like you who have been there done that.

Thanks heaps and I look forward to getting the stealth sometime soon

From my own experience; I have an aftermarket exhaust and find this has not caused any troubles with the maps and particularly seems to help with the 10psi map (remembering the the boost is electronically controlled in these engines; so the exhaust backpressure differences do not effect boost levels/tune of the engine as much as you may think - hence there being little point of doing an exhaust unless you are aiming for much higher power levels). 

As for valve springs; I suppose there is different quality and tolerances out there so my personal experience may not be the same for everyone.  Having said this I have not noticed any problems running the 10psi map with stock springs - mind you the boost levels do taper off at the top end where combustion pressure would otherwise be greatest on the valves (given the tuning employed to keep the A/F ratios acceptable with the injectors maxed out around 4500rpm I believe).  So maybe it is the best of both worlds in that no changes are nessecary to run at that spec.  If any changes were made - less restrictive air intakes would probably produce the best bang for buck with using the generic 10psi map (this is just my theory from driving my currently standard intake arrangement which I feel is choking the engine somewhat on the 10psi map in certain conditions).  Some before and after dynos and driving will hopefully prove my hypothesis in time to come

Nighteve, you are pretty much spot on the money. In relation to valve springs it is dependant on the individual car. Because you already have have exhaust mods this will help to ensure you will not have much problems until you get up around the 280-300rwkw mark, as the backpressure does not 'bounce' back as much so to speak.

The injectors can be run on a standard tune, it is just a matter of changing the codes within the PCM. This would obviously be done when you get a custom tune, so you can run a performance tune and a standard tune with the bigger injectors.