tb's

24th August 2008, 11:54

just really woundering ho people go about passing emission test on mot when running throttle bodies?

24th August 2008, 11:55

shouldnt be an issue with tbs as long as youve got the cat in place and its been mapped properly

carbs are where you run in to trouble as they are a bastard to setup in the first place, let alone make them give clean emissions

24th August 2008, 11:56

20 quid tbh

24th August 2008, 11:58

If its been mapped well it should be pass emissions with flying colours.

24th August 2008, 13:17

depends what cam you have

24th August 2008, 13:28

was just interested really as a friend has a 306 gti6 running tb's and piper 280 cam and he says it wont pass the MOT on emissions

24th August 2008, 13:30

tb's are just like any other car for emissions really, its the cam profile that really messes things up, that sounds a mildish cam (not true 280?) so if its mapped with emissons in mind it should be ok.

24th August 2008, 13:32

Quote:

Originally Posted by dannygti

that sounds a mildish cam (not true 280?)

whats not true?
he said he is looking to run a 300 soon aswell

24th August 2008, 13:35

the piper range arent dont match to the name of them. eg a 285 is a 260. a 300 is a 285

a true 285 wont pass mot

im sure danny typing the same lol

24th August 2008, 13:36

Quote:

Originally Posted by stendog

whats not true?
he said he is looking to run a 300 soon aswell

from what i know a piper 280 is a true 266ish degree duration and a piper bp300 is a true 280degree duration? im sure kam racing or someone witha knowledge of piper will point out.

24th August 2008, 13:36

bullet owned me......

24th August 2008, 13:38

cheers lads was just interested by that so thought i would ask for some superior knowledge!

24th August 2008, 14:13

Any car can pass, no matter what the cam, no matter what the setup.

Map it too pass. Simple.

24th August 2008, 14:20

Quote:

Originally Posted by RCD-Performance

Any car can pass, no matter what the cam, no matter what the setup.

Map it too pass. Simple.

but surely if you map it to pass you wont be getting the most out of it so you would then need to remap it after the mot to get the best performance gains

24th August 2008, 14:23

what he means is if your running a standolone you can alter the map to suit. so when it comes mot time you upload you saved mot passing map. pass, then drive off and change it

24th August 2008, 14:35

you dont even need to alter that map, just create a "MOT" map and a performance map tehn swap the over after.

24th August 2008, 15:52

Quote:

Originally Posted by dannygti

you dont even need to alter that map, just create a "MOT" map and a performance map tehn swap the over after.

That is what i was refering too

24th August 2008, 15:55

On a standard TB steep cams destroy emissions, this is because of charge robbing etc meaning it's impossible to get a clean burn no matter how well it's mapped. With aftermarket ones, depending on setup and mapping you should be able to get almost any cams to pass a test.

24th August 2008, 16:15

thanks that has helped me alot, in other words no matter what cam you can make it pass the mot fairly easily then just revert back to performance after

24th August 2008, 16:29

Yeah, it takes a fair bit of tweeking on the mapping with 803s to get it MOT passable, and with a cat fitted.

24th August 2008, 18:21

Quote:

Originally Posted by dannygti

you dont even need to alter that map, just create a "MOT" map and a performance map tehn swap the over after.

like i didnt say that lol. i meant alter as to change