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  • Member
  • Member For: 17y 8m 29d
  • Gender: Male
  • Location: Hawkes Bay NZ

Hey fellas,

I've got an 04 BA XR6T capa flashed to 9psi (religiously running 98 octane) with airhog pod and centre muffler removed. After these mods the dam thing flies alright - but we always want that bit more!

Its going in tomorrow night to my mates workshop and he plans on upping the boost manually. How far can we go without running into problems? Bigger injectors are on the cards in the future along with a bigger intercooler and prob fuel pump- but before these mods are kicked into life - how much boost can I run safely?

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https://www.fordxr6turbo.com/forum/topic/41658-how-much-boost-is-safe/
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  • Silver Donating Members
  • Member For: 19y 11m 5d
  • Gender: Male
  • Location: OZ

If you are using a manual boost controller I would be extremely careful. Im not down with the tuning side of life but I have a feeling the amount you can change depends on the the boost loop cycle used in your tune. In short, don't be silly used the electronic controls, capa hardware and tuning software to alter boost (I.e. custom tune). Not being harsh, just suggesting you play it safe :-)

  • Member
  • Member For: 17y 8m 29d
  • Gender: Male
  • Location: Hawkes Bay NZ

Yea I am worried about it but my mate ( the diesel mechanic ) thinks it should be fine and the computer will compensate for timing etc. Cant really afford for anything to go wrong hence my post!

Maybe bumping to around 11 or 12psi max???

  • Mmmmm......BOOST
  • Member
  • Member For: 18y 1m 16d
  • Gender: Male
  • Location: central coast

how exactly is he going to raise the boost

I wouldn't play to much without a dyno to get afr readings etc

  • Donating Members
  • Member For: 21y 11m 17d

Standard injector will struggle top end with boost pressures at 10PSI or higher. Moreover, the car has been programmed to supply a certain amount of fuel, which is a match for the commanded boost pressure. Increasing the boost will no automatically increase the fuel and (unless your car is running VERY rich) you will lean out.

I would strongly recommend NOT to play with the boost without adequate diagnostic equipment to review the effects of any changes.

  • Member
  • Member For: 17y 8m 29d
  • Gender: Male
  • Location: Hawkes Bay NZ

I got no idea how he plans to do it - he does it to trucks everyday - but I'm too nervous to damage my baby now!

If anything "might" tweak up 9.5-10psi

Thanks alot guys :spoton:

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