wrong extractors?

[repowered]

hey

this guys made my 4-2-1 extractors.

isnt this totaly the wrong way - like how 1 -2 pipes are joined and 3-4

shouldnt it be like 1-4 and 2-3 joining up. how much difference does this make, he reckons none and has done a silver top like this before.

im told it makes it have funny sound to it.




http://homepages.slingshot.co.nz/~jimco/images/extractors2.jpg

this is how it should be?? am i right?



churz

[Jebus]

SSUUUBBBBAAARRRUUUU!!!!!!!

[repowered]

SSUUUBBBBAAARRRUUUU!!!!!!!

i know that what some one else said it would sound like! fuk

[matt dunn]

Primary's are in the wrong order,

and IMO the secondary's are too short.

matt

[repowered]

Primary's are in the wrong order,

and IMO the secondary's are too short.

matt

cheers he said he would change it if i want


so is that bottom pic how they should be made?

[matt dunn]

I would say yes,

and if i was doing it i would not make the two pipes into one untill about 1 foot or so in front of where the front of the seat would be.

[repowered]

I would say yes,

and if i was doing it i would not make the two pipes into one untill about 1 foot or so in front of where the front of the seat would be.

yea that sounds alot better to me aye.

[fuel]

Each runner should be equal length too. Sounds like the guy has no idea what he is doing when it comes to designing extractors.

Even if you look on factory cast manifolds you will see numbers 1+3 and 2+4 are joined before going to the secondary or collector pipe.

[repowered]

Each runner should be equal length too. Sounds like the guy has no idea what he is doing when it comes to designing extractors.

Even if you look on factory cast manifolds you will see numbers 1+3 and 2+4 are joined before going to the secondary or collector pipe.

thats exactly what i showed him aye, we checked it out and hes doing it again. ive seen his 4-1 and they look pretty good, he doesnt do many 4-2-1

[KinLoud]

Don't stress too much about primaries being equal length. Within 15 to 20% will work fine.
If there is some variation in length it helps to widen the power band a bit.

Ken
Ham
021 408 863

[repowered]

Don't stress too much about primaries being equal length. Within 15 to 20% will work fine.
If there is some variation in length it helps to widen the power band a bit.

Ken
Ham
021 408 863

sweet cheers man, ill print out that last pic and show him - i want it like that!

[Caveman]

And if your running an o2 sensor mount it where the 2-1 collector is, not just on one cylinder.

[repowered]

And if your running an o2 sensor mount it where the 2-1 collector is, not just on one cylinder.

yep i know about that thankz, the ones that have been made and are on there now are downb y the 2-1 collector.



i told him i wanted them redone but he hasnt got the time at the moment so he just gave what he had made to me! said its nto worth anthing to him. so cars at the painters today getting front 1/4's and bonnet done.

dropped driveshaft off last night for shortening - get discount through work so hopefully wont cost too much.

[repowered]

And if your running an o2 sensor mount it where the 2-1 collector is, not just on one cylinder.

yep i know about that thankz, the ones that have been made and are on there now are down by the 2-1 collector.



i told him i wanted them redone but he hasnt got the time at the moment so he just gave what he had made to me! said its nto worth anthing to him. so cars at the painters today getting front 1/4's and bonnet done.

dropped driveshaft off last night for shortening - get discount through work so hopefully wont cost too much.

[strx7]

secondaries should be twice the length of the primaries shouldn't they?

[repowered]

secondaries should be twice the length of the primaries shouldn't they?

oh ok thanks, nto sure if i should keep them and see how they go, i could wait untill he can do them again, or jsut get 4-1 which seems way easier to get premade. where do you buy 4-2-1 ae86 ones should be ok.

[Adamal]

I think you'd find stock exhaust manifold would prove more efficient

Honestly, looking at the quality of the build, it looks like it would fall to pieces. I wouldn't keep them on there for long!

[matt dunn]

Apparantly the stock exh manifold with longer secondaries is very good.

[repowered]

Apparantly the stock exh manifold with longer secondaries is very good.

the stock monifold points down at a funny angle and it point right at the steering arm. my engine sits back by the firewall so its stuffs stock manifold. i could use it but there would ahve to be this big 90' then a step down to get under firewall.

no one knows where to buy 4-2-1 (tri-Y) extractors?

[QikStarlie]

i made some out of coby 4-1's. extra pipe came from the local car dump and under the house..

half done
http://img.photobucket.com/albums/v178/ ... c_0016.jpg
2-1 bit
http://img.photobucket.com/albums/v178/ ... 000141.jpg

cost 0