4396 replies to this topic

[NickB787]

I will try to find it out must have it written down somewhere, away in the morning for 3 days though if not, sorry

[Arno]

 

Yes will do Not planning on having any restriction before charger

 

 

Also try to keep the biggest pipe diameter you can from the filter to the TB and then fit a reducer piece at or close to the TB to bring it to the correct size.

 

Eg. if your new filter has a 110MM attachement for a pipe, keep it 110MM to close to the TB and then reduce to the TB size at that point.

 

Bigger surface area/diameter of the pipe means lower air speeds for the same volume/sec which pretty much directly translates into less pressure drop pre-TB.

 

Bye, Arno.

[CHILL Gone DUTCH]

 Yes will do Not planning on having any restriction before charger  

  Also try to keep the biggest pipe diameter you can from the filter to the TB and then fit a reducer piece at or close to the TB to bring it to the correct size.   Eg. if your new filter has a 110MM attachement for a pipe, keep it 110MM to close to the TB and then reduce to the TB size at that point.   Bigger surface area/diameter of the pipe means lower air speeds for the same volume/sec which pretty much directly translates into less pressure drop pre-TB.   Bye, Arno.

Would it be better to get a larger bit on air filter and reduce toTB As I can choose what size outlet on the TB side of filter??

[CHILL Gone DUTCH]

Like this

[CHILL Gone DUTCH]

[qu

Edited by CHILL Gone DUTCH, 12 April 2015 - 09:31 AM.

[CHILL Gone DUTCH]

Or maybe just to 89mm or 82mm?

[Arno]

You'd have to look at the fitment and how straight you can get the pipe to fit.

 

If that's all not going to be too much of a problem I'd presonally go for a nice big bore. Look at the common (silicone) hose sizes and see what matches up best.

 

If your LS4 TB needs a 75/76mm hose then for instance you can use a 102mm pipe and use a reducer like this (shortened as much as possible on the TB side to let the taper end just at the TB flange) and a ali coupler to the first straight pipe from the filter:

 

http://www.apmotorst...sr-102-076.html

 

 

 

That way you have a long(ish) run of nice big straight 102mm pipe where the intake air doesn't need to move as fast and the final part narrows (and accelerates the air) into the TB to maximise the intake efficiency.

 

Bye, Arno.

[CHILL Gone DUTCH]

That's what I'm doing thanks Arno

[CHILL Gone DUTCH]

While I think about the next thing Can the cam breather pipe go after TB where most put there brake vacuum Saves me having to put it pre TB ??

[Bargi]

I'll probably get shot down for this but how about do a power run without the air filter or fix a stocking over the end to keep out the big stuff. Should tell you pretty if its something other than the air filter restricting

[CHILL Gone DUTCH]

I'll probably get shot down for this but how about do a power run without the air filter or fix a stocking over the end to keep out the big stuff. Should tell you pretty if its something other than the air filter restricting

I don't fancy that Plus my filter is due to be changed anyway

[GeorgeBC]

Just fit a smaller pulley and be done with it. Your car is shockingly slow for a Harrop SC 

[CHILL Gone DUTCH]

Just fit a smaller pulley and be done with it. Your car is shockingly slow for a Harrop SC 

Lol 🚙💨 But yet still as quick as yours

[GeorgeBC]

In a straight line! It should be with my lovely cheap stock engine!

[CHILL Gone DUTCH]

In a straight line! It should be with my lovely cheap stock engine!

Wouldent call amount of money you have spent cheap It scares you before pump was changed Or was that my driving that you were scared off

[GeorgeBC]

Driving

 

[CHILL Gone DUTCH]

Driving  

Lol

[CHILL Gone DUTCH]

Looks like my apexi has been collapsing

[vocky]

good job and at least no one can say you haven't been trying 

[oakmere]

That filter looks very small may be just the pic?