I swapped my 1mm boost jets to 0.8mm last night ;)

 

Jeeeeeeeez it flies now!! What a rush! :eek: :eek: I had gotten used to 12.5psi and this is like having a new, much faster car!!! The boost gauge showed a peak of exactly 15psi.

 

It was 8-10*C outside, no detting in any gear/speed so I'll keep them in and see what its like when the weather warms up :)

 

Cheers to Cos for the idea of cutting the hoses and using 2 jubilee clips to hold onto each end of the jets :cool:

 

:D:D:D

 

Pete

Originally posted by andyduff

Why run different sized jets? :confused: They've gotta be the same size. When you fit adjustable actuators its very important they are both set up equally using a compressor. The basic effect will be slower spool up. Remember its a x-flow engine so the left turbo boosts the right bank and vice versa. Its very difficult to explain but basically the car will hit target boost on the larger jetted turbo, then slowly reach target boost on the smaller jetted turbo. Despite the wastegate being fully open on the larger jetted turbo, it should still boost past target boost due to being fed by the other turbo. I know what I mean! lol

 

Just change the smaller jet for a 0.8mm one...

 

CheerZ,

 

Andy

 

Thanks for replying Andy. Will I be ok to run my car with the two differant size mig tips while I get it sorted?

You should be ok for a short while. Its never possible to tell though how much damage you could be doing. If you do want to drive it then maybe just don't use full throttle until its sorted. I know what its like to seize a turbo - fortunately I was in the position where I could do all the work myself - engine out required for turbo replacement. If I were you I just wouldn't risk running full throttle while its like it is...

 

CheerZ,

 

Andy

Originally posted by andyduff

You should be ok for a short while. Its never possible to tell though how much damage you could be doing. If you do want to drive it then maybe just don't use full throttle until its sorted. I know what its like to seize a turbo - fortunately I was in the position where I could do all the work myself - engine out required for turbo replacement. If I were you I just wouldn't risk running full throttle while its like it is...

 

CheerZ,

 

Andy

 

Thanks m8 I will do that. Don't have another 0.8mm jet, but do have a 0.6mm jet, so will run the car on two 0.6mm jets. I'll have to be careful of det as it will be higher than 15psi that its set to now. Going to try not to thrash her untill I get two 0.8mm.:cry: :cry:

Thanks.

0.6mm :eek:

 

Erm... if my calculations are right this will produce close to 19 - 20 psi. Not reccomended TBH.

Originally posted by SMW1

0.6mm :eek:

 

Erm... if my calculations are right this will produce close to 19 - 20 psi. Not reccomended TBH.

 

Ok, will keep it how it is and just drive without foot to the floor untill I can get it sorted.

Thanks

Originally posted by SMW1

0.6mm :eek:

 

Erm... if my calculations are right this will produce close to 19 - 20 psi. Not reccomended TBH.

 

Would two 0.7mm produce 15psi?

You really should fit a decent permanent boost guage if you are going to play with this kind of stuff. Here are my results with a couple of different sized jets, but all cars are different.

 

No Jets: 0.64 kgf/square cm = 9.10294 lbf/square inch (PSI)

1.2mm Jets: 0.84 kgf/square cm = 11.947609 lbf/square inch (PSI)

1.0mm Jets: 0.92 kgf/square cm = 13.085476 lbf/square inch (PSI)

 

I stuck with the 1.0mm which should also allow for unwanted boost spikes.

 

HTH

Martin :)