this is prob gonna end up a stupid question but dont no nowt about throttle boddies ive heard ov people puttin larger ones on there car i can get a set ov tt ones will they fit na zed are these bigger or the same size.

Blimey... messing with fuelling is not to be taken lightly! if you put larger throttle bodies on wouldn't that cock up air-fuel ratios?

 

Mind you, running rich is better than running lean...

Bigger throttle bodies is a worthwhile mod IMO, far as i know though TT and N/A are the same size. The Zed TB's are infact about the smallest throughout the nissan range, guys in the US buy bored out ones on an exchange basis quite often and i don't know another TB that's compatible with the Zed for easy exchange, unlike many other models of nissan's that are, done the swap before on me other cars and have opted for bored out ones on me Zed this time round.

smithy

You got a price on these Smithy,as I will be ordering a pair from the States.

Blimey... messing with fuelling is not to be taken lightly! if you put larger throttle bodies on wouldn't that cock up air-fuel ratios?

 

Mind you, running rich is better than running lean...

 

 

maybe then, i dont no nothing about them really i just seen 2 for sale but if it could cock things up i think il leave well alone in that case cheers anyway guys.

Hi Smithy,

 

So how much are they bored out and what other changes have to made?

 

Vijay

Vijay these are an extra 3.5mm, did go for 5mm but that was too much ! all yer doing is opening up the amount of free air able to flow through the pipework and TB's into the plenum, if yer have any gadgets that configure air/fuel ratios all the better.

Mac mine were 165 quid the pair mate with new custom butterflies. done down south,

I know when i went bigger TB's on me Silvia which was already tuned, she seemed some what more gruntier and pulled really well, bear in mind that was an 8V single turbo, but went well...

smithy

cheers

smithy

No need to change the mapping if you change the TBs - not unless you're after every single last bhp you can get.... The ecu controls the fueling according to how much is going in (measured by the MAS). Most race systems use the throttle position sensor only - in that case you would need to change the mapping ;)