Whats next for more power from BPU?

Hi guy's, I currently run BPU apart from I kept the second cat and have a EBC to up boost. I have done a search and found that water injection is quite a good thing to have. But does it give any gains in bhp on it's own or would I need a piggy-back ECU to take advantage of it? Also would I see any increase in power by reomiving the second cat even though It wouldnt effect boost as I can raise it anyway.

I also had a look at changing the cams and it looks like they would be the best next upgrade but WI can be had for a fraction of the cost and lowers EGT's ect. Oh . . I have an auto aswel if it matters. Anyway, whats everyone's experiance with mods after basic BPU? What have you guy's found to be best bang for buck? If anyone with an auto runs WI how do you find it, would a simple boost controlled unit be fine? WI only seems to have benefits and I would like to know more

WI will not give you any gains in power, a properly mapped piggyback will give a little gain, have you upped the boost to 1.1bar? you will only notice cams at higher RPMs,and it may feel a little flat at lower RPM, other than hybrids or a single there is little else.

I have experimented with boost levels between 1.0 and 1.2bar and the car feels at it's best just below 1.2bar with the EBC. From what I have read WI seems to be good too lower EGT's and with a Piggy back ECU timing and fuel can be adjusted to give gains. Which ECU do you recommend? I wouldnt need anything flash just enough to make use of WI and maybe cams. Having an auto I dont want to go Single and hybrids seem alot of money and hassle for not much gain. I plan on keeping this car for another year or two and thn I want a Facelift single 6sp but I would have liked just a little bit more power til then.

WI is good as a safeguard, and will help lower EGTs to a degree, but its real use is to allow full use of more advanced timing and leaner fuelling when used in conjunction with a good ECU,

 

If you want to add a piggyback then go for the EMU or MAP 2, both can run a WI map as well, carefully mapped you will see a little gain in power, but don't expect to much, 1.1 bar is about the max you want on J spec turbos, you could always run them in TTC for some extra midrange.

I have experimented with boost levels between 1.0 and 1.2bar and the car feels at it's best just below 1.2bar with the EBC. From what I have read WI seems to be good too lower EGT's and with a Piggy back ECU timing and fuel can be adjusted to give gains. Which ECU do you recommend? I wouldnt need anything flash just enough to make use of WI and maybe cams. Having an auto I dont want to go Single and hybrids seem alot of money and hassle for not much gain. I plan on keeping this car for another year or two and thn I want a Facelift single 6sp but I would have liked just a little bit more power til then.

 

i would not bother doing any of the above, you would be better saving the cash towards your 6 speed tt, and enjoy the auto bpu as it is:D

Cool, thanks for the advise guy's, If there are no gains to speak of from any of the above I think I will do as you say Gaz. The sooner I have the money the sooner I can have my dream supra pointless wasteing money afterall.

i would not bother doing any of the above, you would be better saving the cash towards your 6 speed tt, and enjoy the auto bpu as it is:D

 

Sound advice.