Ok i have got 1.6bar......i acheived this by a very small jet in the middle amal valve pipe and by putting a bigger jet in the "to air" pipe...the other is open totally.

Now if i put the same sized jet in as the middle pipe,in the "to air" pipe...would that keep me at 1.6 bar but with a nice spike?

Actuator is a -31 set as standard.

The car fooking flys at 1.6bar.... but i want a big peak as there is certainly enuff fuel to do this at the earlier revs.......btw no surge from the turbo whatsoever!!!

 

Glad its going Phil.

Cough, Cough, The S8 has mappable boost control even on the standard AMAL valve.

 

Phil:
compressor restriction will increase peak, return restriction will decrease held.

Simon:
Yep, nowt like just adding say, 20 to the boost map area you like and then squeeezing the throttle to see if youve achieved your goal is there?

Fooking hate pissin about with those jets like Phils doin!!

 

Stu...i am confused.

The middle is "c" yes?That has a tiny jet in..actually its a bit of a WD40 red pipe ...the "to air" which is "r"????..has now got the WD40 pipe aswell....

 

Restricting C will increase boost spike / decreasing will lower spike

Restricting R will Decrease held boost / decreasing will raise held

 

Be aware that the R port also has a small effect on peak.

 

stu what happens if all of em have no jets ?

 

I personally hate adjusting boost using this method as it has a
tendancy to wear out the bonnet hinges.

 

 

And Patience levels......

Ginger..
That would be pretty fooking pointles to be honest

 

fpmsl!!!

 

the reason for it is though??


what would it do , i wanna learn about cossies

 

Sorry but this is confusing for a foreign goon.

If restricting C will increase the boost spike how come it will lower the spike if you decrease it?

I mean doesnt restrict and decrease mean the same thing?

 

Sorry fella...
When i say decrease, i meant decrease the restriction....

 

decreasing the restiction
ie,, making it bigger

 

Fooking hell i hate anal opps i mean amal

 

Is this correct then?

I will give it a try on mine because the actuator preload is low.
Tried increasing the preload It boost to much instead so I thought I would alter the jets to get lower boost and then increase actuator preload to get correct boost.

/Andreas

 

edited for double post.

 

Phil,

A real easy starting point is a 2.5mm restrictor in the C port (compressor), nothing in the W port (actuator) and nothing in the R port (vent to atmosphere). Using a -31 installed with half hole preload will normally give around 1.6bar held on a T38. To up this shorten the actuator rod one turn at a time until you get your desired boost. I found I ended up with one full hole preload and above jetting to get 1.9 bar held on last T38 car I mapped.

 

AFPMSL @ That Andreas

 

Hi Karl......i dont use the T38...i use the lastest special T34 with BIG exhaust wheel and BIG comp wheel....437bhp @ 1.6bar on std engine with greys! But can hold 34psi all day

As said i get 1.6 easy with WD40 tube in port C nowt in W and a nearly open C ....i want a 34psi spike and a held 26psi until i get more injectors in!...I didnt think it was wise using the actuator to increase boost????

 

pmsl

Stu@MDevelopments, this is probably a good one for the tech archive

 

phil the problem is without the ability to map the boost yourself you're limited by whatever the amal mapping is set to.

If you go with my above jetting, you'll be able to get the correct held boost, and the spike will perhaps be 2-3psi more. Loading the actuator is fine as long as you keep within sensible limits. This is why I start with half a hole and usually go up to but not more than around a full hole of preload.

Why don't you have a word with sue (if thats where your chip came from) and ask her to progressively shut down the amal valve to give you the desired higher midrange boost and top end drop.

If you can't get this sorted then I'm sure I could sort you out a chip in return for a favour!

 

so if you dont have any restrictions what would that do ???????

 

Reduce the spike, and overall lower the boost compared to if you have a C port jet.

On a side note you're more likely to blow the amal valve apart too!!

 

is there much of an advantage to be had running an electronic boost controller or injectors at this level of tune?

or is it just unnecessary expense?

 

Fook all to do with Phylis's thread Karl but i forgot to mention earlier that i am currently on air to air is that ok for you?
Cheers Spadge..

 

I personally prefer ecu controlled boost methods over seperate boost controllers, but thats mainly because I'm not a gizmo fan and prefer the car interior to be free from clutter.

 

Yes spadge thats fine.

 

Cool speak tommorow

 

Phil,

Nothing to do with settingup boost but have u got ur head ported, just out of interest?

 

Can i see the dyno chart for this engine m8

 

Got more chance of seing the Loch Ness monster

 

Rich...my head is ported to Grp A spec!


Karl.........after the shit i have given you...i wouldnt expect a decent chip...atleast Sue aint got no grudges Plus the chip is compatible with the moniter.

Simon SECS...it shows how serious your ECU offer was!!!!...bollocks Fortunately i dont want it now...you had your chance but failed to deliver after my demands..i wish you much success though.

 

Has a cock though or have i heard wrong

 

So that why Phil got the chip from her!

It is his ideal woman next to raibird in a weg and staletto's

 

another quick Q... how is the ERSt and 2wd saph amals different? are they jetted the same?

reason i ask is i have an amal that someone decided to remove all the jets from, and i also have an ERST one kickin about i could ponce the jets out of rather than feckin about finding something to bung in the holes

 

Nice one phil. Cheers. Who did the porting and how much was it if you dont mind me asking? Cheers

 

Phil - use Carb jets and drill them out. I know Mark used to use these to jet the amal valve.

 

jon ya sigs gone abit behind time