scoobyTaff

iTrader: (6)

Hi guys i have a my94 with the following mods: FORGE REBUILD WISEC PISTONS etc, TD05 16g,FMIC,BLITZ NUR SPEC R,"3" DOWN PIPE,PORTED HEADERS & UP PIPE,440s,POWER FC,WALBRO,GREDDY CLUTCH,CLOSED DECK BLOCK, Im currently running at 1.1bar and was wondering how much boost i can run on this set up to get the maximum out of my mods to date?

Thanks in advnce Taff

tubbytommy

iTrader: (20)

has it been mapped?

harvey

iTrader: (48)

The more boost the shorter the engine life on a standard car.
With your list of mods you need your Power FC remapping to the boost level the mapper is happy with. That will depend on the mapper, his feel for your car and the engine condition.
Boost could be anywhere from 1 bar to 1.3 bar subject to your mapper.
If you are playing with the power FC yourself through the Commander be very careful. A weak mixture or too much ignition and you could need a new engine without even lifting boost from the current level. find a decent mapper and go from there.

scoobyTaff

iTrader: (6)

it was mapped at 1.1bar on the power fc as i didnt have a boost controler at the time we were limited, i have had a rebuild about 30k ago with all forged internals etc. Just wonderd what i could go to boost wise now? will get it set up properly wen i do it though

yabbadoo4

iTrader: (8)

my wagon is sitting at 315@ 1.3 bar with similar mods, turbo etc. and standard internals with no probs.

harvey

iTrader: (48)

It will depend on the pistons and rods used. Why not ask whoever built the engine what boost is good for the rods and pistons used.

Bob Rawle

Unless you change your map sensor you will have problems running any more boost than you are, but your turbo and injectors would allow, probably, 1.5 bar mid range but you will need to drop it at high revs to maybe 1.2 bar. Unfortunately the Apexi ecu cannot profile boost response like that so you will need to fit an external controller such as the Apexi AVC-R which will allow that and negate the need to change the map sensor.

cheers

bob

Shaks-STI

iTrader: (7)

take Harvey's advise find your self a mapper and they will advise you the best way mate.

harvey

iTrader: (48)

You have just heard from one who knows his stuff at post #7.

scoobyTaff

iTrader: (6)

Bob if I have a late spec map sensor that allow max of 1.6bar does that mean boost can be set from the Power FC? If so what amount do you recomend?

stedee

iTrader: (4)

is it a forged cdb or standard is the question????? if standard the internals arent that strong

stedee

iTrader: (4)

afaik boost cant be set from the pfc for versions 1 and 2

scoobyTaff

iTrader: (6)

hmmmm :/ ive been told you can set boost from ecu depending on map sensor limit, on ver 1 & 2 its 1.1bar but if u have a 1997 on map sensor its up to 1.6bar. correct me if im wrong.

stedee

iTrader: (4)

i`m not going to argue , ive never had a pfc for v1/2. i remember ppl saying the pfc doesnt control boost very well without the boost controller set up. does it go upto 1.5 bar on yours, i think it goes upto 2 bar on the v3/4 ,it did a decent job of controlling boost aswell but that could be down to the turbo.

scoobyTaff

iTrader: (6)

yea about that on mine,just spoke to Bob rawle and have been told as a compramise to fitting boost control power fc can be set to run about 1.3bar up to max of inj so will do that for now until i can afford another AVC-R

stedee

iTrader: (4)

i went for the esl for mine in the end because of cold start idle issues with the pfc, very good imo and controls boost , worth thinking about and probably cheaper in the end because you can sell your pfc

Andy Stevens

Good point. Bear in mind the ESL ECU is £295+VAT and will give you knock control, twin maps, mafless running, 3d boost control and diagnostic codes over your Apexi PFC for about half the price of an AVCR on its own.

Jolly Green Monster

iTrader: (4)

the 97 map sensor is not the correct calibration for the apexi PFC... therefore you change the map sensor and if I recall correct it is 0.4bar out.. and works but gets slightly confusing for end user at a later date when boost is 1.4bar but target is 1bar...

you need it remapping for changes regardless.

boost controller will allow higher boost to be mapped in but no boost cut then available should boost jump higher than expected.

Simon

scoobyTaff

iTrader: (6)

so other than a AVC-R what other option do i have to raise the boost then & what max boost do u reckon i should get with a map? u mapped it last time to 1.1bar only because i didnt have a boost controler! Taff

Jolly Green Monster

iTrader: (4)

I remembers

Any boost controller you want. From a simple dawes device to a flash electronic one.

You just wont have a boost cut.

Or seek out an apexi map sensor

scoobyTaff

iTrader: (6)

How much for a Jolly Green Map then Mr Roe?

Jolly Green Monster

iTrader: (4)

Yhpm

scoobyTaff

iTrader: (6)

All sorted Mr Roe Charlie said thats fine il give u a shout when ive got ur wonger