custom inlet manifold

[craig t]

do people on here run custom made inlet manifolds?
i am looking into getting one made but want to hear peoples views first

[craig t]

no one use one on here then?

[Day]

Depends what for mate?

Most engines need to be past stage 3 or more before its neccesary, in which case you can buy aftermarket ones. It would still probably benefit without silly power but its not needed.

Unless your just after bling, in which case theyre aftermarket ones for less then the cost of a custom one.

[James N]

As Day said mate, depends what for. Seen a few for 32 GTSt's, as people look for a different inlet arrangement because the standard one is front entry, lots of people like to go for side entry for ease of FMIC fitment.
Unless you have big power i'm not sure it will give much in the way of power gains though..

[Stavros]

N/A is a different story, but on pretty much any turbo car you wont get fuck all power wise from even an off the shelf aftermarket one till about 250bhp per litre, never mind a custom one.

Come cars the above level is far, far, higher, i mean, a RB26 inlet manifold/plenum can do 1000bhp+

Fitting an overly big inlet manifold will give adverse drivability effects and no extra power.

Some have an advantage of better throttle position or more equal flow to each cyl, but it rsrely important.

Say what car and what you want from it and can tell you yes or no.

[bkvj]

Polo on here has (had?) one on his S14...he spent a stupid amount of hours making his since you have to get the airflow to all cylinders correct.

[Stavros]

Originally Posted by bkvj

you have to get the airflow to all cylinders correct.

99% of stock inlet manifolds dont.

Hence why a lot of engine managment setups have individual cyl trim functions.

Best if they do, but the vast majority dont.

Thats the lot of reasons cars blow up, take the AFR from one point after the cyls have merged, so get an average AFR, even though one may be hugely less than others.

RB26 ones are a prime example there.

If you got an EGT or AFR sensor on each exhaust runner it dont matter though, as you can tell whats wrong and compensate.

[craig t]

its for a project car (vauxhall) its got a 2.0 turbo running 340+ bhp and was thinking of seeing if a different inlet would make a difference, so it looks like i would need to get it made really

[Damien]

Originally Posted by craig t

its for a project car (vauxhall) its got a 2.0 turbo running 340+ bhp

its for a project car (vauxhall) its got a 2.0 turbo

for a project car (vauxhall)

project car (vauxhall)

[kingj]

ha ha @ ^^^ my mate has a c20let and has fitted a 2wd cossie inlet-seems to be working well

[Stavros]

Damien- Why? C20LET is as good as an SR etc, and who said its FWD?

[m.d.]

Originally Posted by Stavros

Damien- Why? C20LET is as good as an SR etc,

if not better.

i made my own inlet and its a load better, better throttle response, less lagg, all sorts of benefits.

but it can be expensive if you get someone else to make it though.

[retrodan]

im toying wit one for the sr as i will be running 450 ish bhp, well thats what i want greg to map car for, but im not sure if i need one yet or not?!?!?!

im pretty sure polo's car was running similar power with stock blacktop sr manifold as it is now with his own creation?!?1

[topi]

It's not all about peak numbers though. Responsivness and smoothness are more important.

[Polo]

Yea i run my own custom manifold, i cant tell how much if any differance it makes as i done so much more at the same time. I only made it as i see the price of the "named" ones and the quallity, was shocked and made one my self for about £50 wich is better quallity than the named ones!

[skyludeboy]

Originally Posted by Polo

Yea i run my own custom manifold, i cant tell how much if any differance it makes as i done so much more at the same time. I only made it as i see the price of the "named" ones and the quallity, was shocked and made one my self for about £50 wich is better quallity than the named ones!

can you make us manifolds for fifty quids as well On a serious note how much for one of your spec manifolds

thanks

[craig t]

Originally Posted by Polo

Yea i run my own custom manifold, i cant tell how much if any differance it makes as i done so much more at the same time. I only made it as i see the price of the "named" ones and the quallity, was shocked and made one my self for about £50 wich is better quallity than the named ones!

i'd be interested if you can/will make one for me, i'm using a Garrett T28R and on 360 bhp and 400lb/ft i changed my boost pipes from 2.5" to 3" and it went up by 30bhp so i want to try a custom manifold before going bigger turbo

and it is fwd for now looking at ways to make it rwd over the winter, just need to find transmission and maybe the floor off a donor car first then we'll see, i wanted to get the power sorted first lol

[gary200]

group buy on polo spec sr inlet manifolds u know you want to paul