Hiya

Please can I have some advice. Is it safe to run a Type R V3 on the Standard ECU without a remap.

I always fill with Shell V-Power or Tesco 99.

Mods include a decat downpipe, Apexi Air Filter, and stainless steel headers.

Should I be adding Octane booster.

There are so many mixed views out there and really would appreciate some advice.

 

always going to be better to have a remap.

 

at least get it dyno'd before you give it large to make sure its not cocked up the AFR.

with that amount of changes you could also hit boost/fuel cut if it can't cope.

get it dyno'd and if its fine then you don't need a map, but if its not then you'll know. also in winter you may get issues due to the colder air.

changing the headers etc then it wouldn't surprise me at all if it did need mapping.

 

a check on a dyno is cheaper than a new engine!

 

yes its perfectly fine to run on v-power/tesco without remap.Its very unlikely to have been set up for 100+ octane fuel from factory as the fuel wasnt available in Japan till mid 1998

 

Is it an STI? If its a WRX I wouldnt worry with those mods as long as its run on V-Power. AFAIK it was Mid 96 when japan got 100 Octane.

 

Will get it booked on the dyno then once engine has been run in fully

 

i meant to say wasnt 'widely' available till mid 98 it was first introduced to japan in sept 96 iirc which is probably the reason mappable ecus werent introduced till the late 1998 (MY99) model impreza

so my contact in Japan tells me anyway

 

let us know hoe it goes scoobylou, iv got similar mods as u and am waiting on an apexi pfc so i can get car remapped

 

You driving the car normally without a remap?? I have to drive mine under 4000 revs as its just had a new engine.

You experiencing any issues?

 

if its had a new engine it'll need mapping anyway.

 

Hows that? If its the same engine, why would it need remaping?

 

he says he's had a new engine

 

Sorry my mistake not new engine, it was a bottom end rebuild

 

tbh i'd have one if part of the engine is rebuilt.

y risk it? cost you 500 to map it, yet could cost 2.5k to not have it mapped if all goes **** up.

 

Wish it would cost 500, apparently I'm looking at over a grand!

But like you say why risk it.

 

This MY requires an aftermarket ECU for a Remap at the cost of around £1K. Sorry, but to suggest that he needs a remap after a bottom end rebuild is complete and utter tosh IMO.

 

Oh god I'm so confused

I will stick on a rolling road and make sure there are no issues just to make sure

 

Aye when most people say new engine, they mean rebuild

 

Ok ok so I got it wrong, I'm blonde