1jz questions

[big_zop]

DIY Low Cost FCD

(first one to come up in a 'DIY FCD' google search )

[JZA70 R]

Best to leave it stock and see how it is first. A more powerful car than you can handle will make things harder and less fun to learn.

But to increase power, certain things need to be done in order to get the most out of them - but quite simple really.

Two most important would be to have proper dumps fitted (quite expensive since many consider it custom due to clearance/conversion issues with the steering shaft) and removing the stock ecu restrictions. I cant say whether going to a programmable ecu will be best but would be the prefferred option and not cheap, at least FCD/SCD.

With a manual trans 250rwkW is possible with an ecu, fuel pump, exhaust, dumps, intercooler and the right amount of boost (will depend on condition of everyhting but if stop making power, then its time to stop increasing boost). At this point, you will also be nearing the limit of the stock injectors.

Dont go increasing the boost till you have done these but you are going to be a better driver if you learn with less power. Its probably better to concentrate on suspension, diff and durability items (upgraded cooling for oil/water, better clutch) - but i would be doing the dumps as your first 'power' mod.

The information is here, or on the net, so dont forget to search.

This info is spot on. The only thing i would like to add is by the time you finish all these mods. you will not need a boost controller unless you want to increase the turbos spool or gain.

Obviously each time you perform a 'breathing' mod, you will find boost pressure will increase gradually until you run into wastegate control problems like me. So a B/C i would consider as optional since boost will increase with each mod. A nice little side effect.

Ive pretty much done it all to get 242 rwkw and i cant control boost below 1.4 bar in winter. starts off at .8/.9 bar and creeps up to 1.4 by the end of 3rd.

on a hub pack dyno i made 254 rwkw and that was in summer. ive since installed much better condition turbos (stock), a thermal gasket, adjustable cam gears, 440cc injectors and a more agressive retune.

[wiseco7mgt]

hey blinky pm your email for the diagrams.

[big JON]

If 200rwkW is all you're after than it is pretty easily achieved.

I made that with just front mount, pod, cat back exhaust, SAFC & AVCR.

Essentially, if you had a front pipe and maybe, but not necessarily, dumps then you wouldn't need the AVCR and you would have your goal.

SAFC's are cheap as these days so i definitely think its worth considering on your stock setup without shelling out thousands for standalone