130 replies to this topic

[LordRagnar]

Ok so put my VXT on the dyno this morning and the readout was a bit of a shock (see image) There is no engine light on and I don't experience any loss in power or boost when I drive it so a little confused here, Its supposed to have a stage 1 remap but according to this its lost 20 ponies from standard!!

 

Any ideas?

 

[Wolfstone]

Stage 1 remap should at least have cured that dip at 3200rpm!

[CHILL Gone DUTCH]

it says boost dropping and over fueling on the sheet 

 

if boost is dropping it will be over fueling 

maybe a boost leak 

[siztenboots]

most of these VXT were built in 2003/4 , so some of the control solenoids and actuators are 14 years old. 

 

torque and bhp curves should look more like this, boost should be smooth

 

[TurboTurkey]

Check intake pipe or pipe work leading to cooler , mine came off an had loss of power .

[LordRagnar]

Check intake pipe or pipe work leading to cooler , mine came off an had loss of power .

 

I don't really know my way around the VX yet where should i be looking for this? Bit of a newbie question there lol

[siztenboots]

when was the air filter last changed

[P11 COV]

Possible problems aside RR figures need to be taken with a pinch of salt. They will all read differently depending in the data inputed. You can only really compare a before and after. 20 bhp could just be down to that particular RR and how it was set up.

[hairy]

 

Check intake pipe or pipe work leading to cooler , mine came off an had loss of power .

 

I don't really know my way around the VX yet where should i be looking for this? Bit of a newbie question there lol

 

 

Ask Nev to send you his Z20 LEx bible

[LordRagnar]

when was the air filter last changed

Not sure but ill probably replace it

[slindborg]

Collapsing intake tube.

[tibby]

when was the air filter last changed

+1 http://www.vx220.org...ower-loss-dyno/

[LordRagnar]

So went back to the Dyno today and finally got to the bottom of it, we didn't remove the abs fuse!!!!

 

Its running at 231bhp BUT 371lbs or torque!!!!!!!!!!!!!!!

 

SO re map it is.

[siztenboots]

Give me a shout if you want that map sorted out, looks terrible to drive.

[Nev]

So went back to the Dyno today and finally got to the bottom of it, we didn't remove the abs fuse!!!!

 

Its running at 231bhp BUT 371lbs or torque!!!!!!!!!!!!!!!

 

SO re map it is.

 

Whaaat?

 

Sounds like you have your info wrong there dude, 371 ft/lb of torque is beyond the turbo's ability, particularly as that conflicts dramatically with 231 HP.

 

And what has the ABS fuse got to do with the power?

[P11 COV]

 

So went back to the Dyno today and finally got to the bottom of it, we didn't remove the abs fuse!!!!

 

Its running at 231bhp BUT 371lbs or torque!!!!!!!!!!!!!!!

 

SO re map it is.

 

Whaaat?

 

Sounds like you have your info wrong there dude, 371 ft/lb of torque is beyond the turbo's ability, particularly as that conflicts dramatically with 231 HP.

 

And what has the ABS fuse got to do with the power?

 

 

Yeah...you weren't using the brakes on the RR presumably.  

[LordRagnar]

On the VX you have to remove the abs fuse to get a correct reading hence the 167bhp before. Yeah its well above what it should be thats why its getting re mapped to correct the torque.

[LordRagnar]

So went back to the Dyno today and finally got to the bottom of it, we didn't remove the abs fuse!!!!   Its running at 231bhp BUT 371lbs or torque!!!!!!!!!!!!!!!   SO re map it is.

  Whaaat?   Sounds like you have your info wrong there dude, 371 ft/lb of torque is beyond the turbo's ability, particularly as that conflicts dramatically with 231 HP.   And what has the ABS fuse got to do with the power?

Nope the numbers are correct they where shocked at the garage and said it needs remap to sort it.

[techieboy]

Find a new garage.

[LordRagnar]

Find a new garage.

 

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