Custom plenum and throttle body plus computer

[Spook's_Skyline]

Finally got around to getting my fmic installed (gtr r32 cooler on r33 sedan with usual mods, pod, exhaust, dump pipe)

Decided to go with a mob that did a custom plenum and throttle body with the fmic install (got a good price as i did some pc work for them) and liked teh sound of clearing some space above teh engine

got the car back and its running terribly (felt like a misfire bigtime hitting boost)

got it dynoed today and the tuner told me that basically the standard computer is having kittens all over the shop (injectors are maxing out, computer is throwing up fuel cut and going into limp mode when booting it in 3rd and 4th gear, sometimes second)

i was originally planning on going a power fc relatively soon after the install, but the tuner told me that it wont do teh job because of the mods to the plenum and throttle body and the associated sensors, is this the case?

hes told me i need to go a motec M400 (like 4grand worth)

do i have other options?

ive turned the boost right down and am basically just going to put around to not risk blowing up the engine;

[Spook's_Skyline]

mmm, ok;

let me rephrase my question

will a powerfc work on a custom plenum/throttle body setup?

[Alf]

Are you using all the factory sensors for that engine?.

[Spook's_Skyline]

yes

[600hp]

yes the power fc will work!

get a good shop to tune the car and you should have a bit of a beast on your hands,oh and what turbo are you running.

[pnblight]

Pfc will do the job fine, can you post some pics of the custom plenum and pipe work cheers

[Spook's_Skyline]

its still the stock turbo

havent got any pix yet, but ill get around to it;

[33SOM]

Who did the plenum?? What size throttle body?

[Spook's_Skyline]

i think its a ford throttle body

mob called prosport did it

still has factory sensors everywhere (well, it should anyway)

[muaythailuke]

yeah would like to see some pics of modded plenum.

What boost were you running when it was running ruff, but I wouldnt think a standard turbo would make the injectors max out anyway??? unless you were running huge boost but then you'd be picking the exhaust wheel out of your dump pipe.

I would be taking it to another turner anyway to get a second opinion anyway before you go buy a $1200 PFC or a $4000 motec

[33SOM]

Is there any physical difference in a XF TPS and the stock 33TPS?? Any advantages of me retaining the XF TPS?? Its a 80mm subzero throttle body if it makes a difference.

Thanks.

[Spook's_Skyline]

ok, got the car sorted (props to motsons in brissy)

somehow the first mob i went to, missed that the timing was way, way out (33 advance)

that the tps hadnt been reset/calibrated correctly and that the throttle cable was sticking

car back in tip top shape and awaiting engine managemnt

ill post some pix of the custom work as soon as i get the pix online for those that were interested

[Spook's_Skyline]

some pix of the custom plennum and throttle body for those that are interested

all i know is that the throttle body is off a ford (i think its a 5 litre ford throttle body . . .)

http://members.optusnet.com.au/davidbrough...hrottlebody.jpg

http://members.optusnet.com.au/davidbrough...erthehoodee.jpg

http://members.optusnet.com.au/davidbrough...hton/thecar.jpg

[muaythailuke]

Looks very different than most ive seen, did you get any gains from it, other than the easy access to the plugs? The larger throttle body would have made a difference wouldnt it?

[Spook's_Skyline]

well, coz the dramas i had after the work (see above)

im just runnign around on 6psi atm (wife made me, she didnt want me breaking anything again);

that said it scoots along quite nicely

ill get my engine managment done soonish, so ill post a dyno then