Hello all!

Tonight i fitted (i meaning a mate) a new bigger intercooler and since then i just gave ait some (couldnt help meself) and ive lost 5lb of boost!

Any ideas...all hoses,clips,brackets were done up tight! so im sure theres no leak there!

could it be cus of the larger size and more free flowing nature?!

Thanks for any USEFULL input (yes AJ thats aimed at you! )

Regards

James!

 

Hmmmmmmm, that's a strange one
























Unfortunatly i still cant help you

 

i knew you would be first!

 

fpmsl

 

 

depending on the core and the style you will get a boost drop

5psi is quite alot though

 

Yeah if u get a bigger intercooler i though its quite norm to get a bit of a boost drop, though not sure what the average drop is though sorry. Nrom fixed by winding the actuator a bit more

 

i only lost about a lb of boost when i fitted mine and that was a big increase in capacity! is everything exactly how it was before?

why not just adjust the bleed valve to get back to full boost??!

 

Thats what i wanted to hear! ive gone from a half size pace to a large core rad tec! so it wouldnt surprise me to get a big drop! just means me stg 3 turbo goin to be doin its worth come friday when she gets set up!

 

i would say at 5psi thats too much boost drop tbh mate, disconnect all hoses and reconect em again, ya almost deffo have another issue

 

There you go matey, all sorted! Glad i could be of assistance (again)! Im gonna start charging you for all my good advice in future

 

Sounds like it could be a shit intercooler. This is why ACT's mean jack shit on there own.

 

rick just wondering if the cooler causes a 5psi boost drop would that mean the turbo is technically gonna be over speeding , as in a loose boost pipe makes a turbo over speed ect


jsut wondering, could be wrong obviously ( not like it would be the first time )

 

At the moment, the turboi will be doing exactly the same as it was. There is still the original boost in the compressor housing, which is where the actuator is taken from. If the actuator was being fed from after the intercooler, what would happen is that the engine would see the same pressure as it did before, but the compressor pressure would be up 5psi, and the turbo working harder.

You are in effect having to generate 5psi of boost just to get the air through the intercooler - thats a lot of power to waste.

 

No mate its just the "flow resistance" of the cooler, if you havent got a leak your turbo should not be overspeeding.

 

meaning making the turbio overspeed for whats its designed for in some situations

 

I got a Rad Tec on my S2. I went from standard to this and have not had a drop in boost at all as B19Bal said think you have another prob

 

If you had gone from Standard to the Radtec, I would have said could be Pressure Drop across the Cooler, however, you went from Pace to Radtec. I reckon 5psi is too much.

Check all your connections again. You would be surprised how tight those Jubilee's have to be.

 

Agree with that!! tighten them up with a socket etc as i kept poping boost hoses off before! Though dont over tighten either as i have snapped a few clips

 

I think 5 psi is too much.
But....
No, as the Pace flows very well, it's got a greater cross sectional area than the std, and the same flow path.

 

Lol..muppet

 

you really should be experiencing a pressure gain from fitting a correctly specc'd intercooler.
Pressure loss equals power loss
normally- winding the boost back up to where it was, generates more heat

 

yeah reminds me i must get new clips

 

When I went from my dinky Pace to the big Pace I noticed very very little drop in pressure.

I would say you have a problem somewhere, re check all the hoses and clips mate

 

Yes.. the pace cooler is single pass... you should not get a loss from a single pass cooler

 

th new pace aint that much bigger

and ya would bever notice the ammoutn of boost ya stick through your car steve either

 

Thats actually a very good point... people do seem to get carried away with ACT's and not even consider Internal air flow, external air flow, volume etc... All equally important factors when designing a high performance cooling system

 

well for once looks like my problem has started a good debate!

Will go out today and check all me hose's!

Got a feeling its the one from the bottom of the turbo to the intercooler!

Thanks for all the help guys!

rst steve, how did you mount your fan?!

 

well just tightend all the hose clips! and to be honest none of them seemed that loose! not loose enough to loose 5lb of air! will take it out for a spin soon!

 

You would be surprised, I was losing that through a dodgy Injector seal a while ago.

 

well i will post back to ya after ive taken her out for a spin!! just got a daughter that needs attention at mo!

 

Did you get it sorted James??

 

done all the hoses up and gave it a bootfull! and still boost gauge still only reading 11/12psi! kinda hard to tell when booting it! car still feels as fast! but i know the gauge werent goin back upto 16psi!

getting set up friday! will see if christian spots something i didnt! (more than likely)

 

Dumb question but have all the end tanks been fully welded?, if a weld has been missed out, then the leak will cause low boost. I've seen this problem on an American web site I go on.

 

i fully checked it all! and it all looks totally sound! and i made sure it never got knocked or anything!

It took pride of place on the mantal! lol...

So far as everything looks and feels its all complety sound!!

i really appreciate all the help guys honestly!

 

This is how i fitted my fan

hope this helps

 

james.. how did the set up go yesterday... did you find that 5psi??!