scruffythefirst

Anyone know what size to drill the jets out on an 4x4 cossie AMAL valve to get more boost. -34 actuator and standard 4x4 t3. Its having a re-map at the same time, I just need to know which jets and what size


Cheers

Hugh

S2martin

I thought the jets were just replaced? never knew they had to be drilled

scruffythefirst

I think you can replace them but as I don't have any of the correct size, drilling them is my only option at this point, seeing as its getting re-mapped at 10am for full throttle gearchanges, and more bost

pete mcrash

iTrader: (1)

ur "remapper" will do all that shit for u!!!!...unless he's a dimwhit,then ur better off to B&Q and asking in store.............. ....why on earth are u using a -34 on a t3?????

RS500/364

your mapper should do it
and 34 on t3 -34 is for boost over 30psi
your turbo will last fuc all miles !!

Stu @ M Developments

iTrader: (12)

-34 will be fine on that turbo with the amal correctly jetted. A -31 with a full whole preload is about the same strength.

Your mapper should know how to rejet the amal mate, just leave it to him.

However, if your keen to mess:

To increase the held reading, increase the bleed size of the "R" port.

To increase the peak, Decrease the bleed size of the "C" port.

To Increase both, decrease the size of the "W" port

RS500/364

You make it so simple

Stu @ M Developments

iTrader: (12)

Each to their own pal. Its no different to an electrician making wiring a consumer unit look simple. Anything simple if your tought correctly.

saph4be

just compared mine to a mates and his has two white bits in two off the pipes (ports r and c) mine has none wtf is that all about

Stu @ M Developments

iTrader: (12)

Yours has been cocked up.

Turbosystems

iTrader: (5)

0.8m jet in the c port it is not wise to ask an amul valve to control high boost levels best to restrict the control pressure and let the valve do a little work

JamboRS

stu would this work for an erst amal valve too,im havin troubles with not holdin boost high up,ive got the 'C' port bleeder decreased and it peaks at 21psi but by 6k rpm its down to 16.3psi,could i use this to get more boost held top end or does it only apply to cossies
cheers

Stu @ M Developments

iTrader: (12)

A turbo is a turbo mate, the system is teh same no matter what. However, you can only hold pressure for as long as the engine is providing a restriction to your compressors air shifting efficiency.

Once the engine starts to consume all the air you can give, the restriction starts to fall and thus so does the pressure in the inlet. It doesnt mean you are flowing less air, only that your compressor is struggling more than it did earlier when the engine efficiency and speed was a little lower.

You do of course consume almost double the amount of air at 6000rpm as you did at 300rpm, hence its easier to get the boost higher, lower in teh rev range.

If that makes sense? lol

JamboRS

yes it makes sense mate,alan at ava reckons its my intercooler(grs twin pass),theres plenty fuel top end as we've had the boost at 18-19psi at 6k but the mid range then is around 24-25psi which is too high for the prehistoric k jet to keep up and your getting cracks of det,so had to get turned back down to a safe level but only 16.3 at 6k

what size jet for the 'W' port?
cheers

scruffythefirst

Cheers Chaps,

All sorted by dave at emerald.

cossie4i+

iTrader: (15)

So what results did you get ??????

Steve.