air flow

[smiffy]

My micra is used for grass track racing and it can get fairly muddy when racing.
Im putting a cone filter straight onto the TB, but this will mean cutting a hole in the bonnet so ill need an air scoop, would the scoop be just as effective if I have it backwards i.e hole at the back (to stop mud colgging the filter)

A m8 told me that the 1.3 distributer is bigger than the 1.0, thus making the 1.0 run quicker - is this true or false.?

also I currently have the limitter taken of the standard 1.0, it revs up to 8000rmp, buts struggles when it get to around 6500-7000revs is this normal.?

 

[Noddie]

My micra is used for grass track racing and it can get fairly muddy when racing.
Im putting a cone filter straight onto the TB, but this will mean cutting a hole in the bonnet so ill need an air scoop, would the scoop be just as effective if I have it backwards i.e hole at the back (to stop mud colgging the filter)
TBH you would be better to get the ga16 airbox (bigger filter) and a larger cold air feed from behind the battery

A m8 told me that the 1.3 distributer is bigger than the 1.0, thus making the 1.0 run quicker - is this true or false.?
I guess you mean TB and no, he is wrong, they are the same.

also I currently have the limitter taken of the standard 1.0, it revs up to 8000rmp, buts struggles when it get to around 6500-7000revs is this normal.?

pretty sure thats not normal, these engines love to rev, what did you do to take the limiter off?

 

[smiffy]

I used to have the air coming from behind the battery but sucked up too much dirt for my liking,

No m8 im on about the distributer, he said it has a bigger shaft or something,

I put tape over the hole on the plate in the distributer.

 

[frank]

the dizzy,s are the same smiffy (the 1.0 ecu has more total ignition advance the apparently)
and cant you fit the filter inside the car ? (cooler and dirt free, and very loud )
and you need cams really to get any power above 7k

 

[smiffy]

Thats were I have it at the moment, but I dont have pipes to connect up the cone filter, so I have to connect straight onto the TB,

is it hard to put in the 1.3 cams.? will the tappets or anything need adjusting.?

 

[frank]

the cams are a straight forward swap (there,s been a few threads posted this year covering it), and the clearances are usually within spec, but a decent inlet cam will really help for grassing

 

[smiffy]

any other tweks that can be done to the engine

 

[frank]

any other tweks that can be done to the engine

you could do with more compression really (headskim) and exh manifold mods, and a bigger downpipe, 2nd decat

 

[smiffy]

exh manifold mods.? what would they be.? I have straight pipe from the 1st cat and drilled out the 1st cat

 

[frank]

exh manifold mods.? what would they be.? I have straight pipe from the 1st cat and drilled out the 1st cat

you can open up the mani to make it flow better, and the downpipe is a 32mm bore peashooter fwn

 

[smiffy]

any links to a guide on swoping the cams, i cant find one,

 

[frank]

any links to a guide on swoping the cams, i cant find one,

here,s one :grinning:
http://www.micra.org.uk/threads/37298-URGENT-Timing-Chain-no-coloured-links!?
nother
http://www.micra.org.uk/threads/36894-Urgent-Camshaft-replacement-qeustion?

 

[smiffy]

Thanks frank,

about 1 of my other questions will putting the air scoop on backwards make any differnce to the air flow to the filter.?

 

[frank]

Thanks frank,

about 1 of my other questions will putting the air scoop on backwards make any differnce to the air flow to the filter.?

i guess that would depend on the speed smiffy, it might create a low pressure area at 70mph, but i doubt if it will have any effect at 40 tho

 

[smiffy]

wel the top speed I can get before I have to brake on the track I race is 60-65mph so should be grand