Hi

I have a MY95 Scooby and am wondering what advantages and disadvantage there are to changing the cooling hoses and turbo hoses.
How much performance would i gain?
also i have a ITG Panel filter in, now would i get more benefit and bhp out of having the pipercross induction cone filter on.

 

Assuming the 95 is not too different from my99> (?);

Remove resonator (see other post) & replace the intercooler hosing...imho (I've seen under the intercooler)

Richard

 

GSM21
I was talking to a guy from Prodrive and he reconned that 33% of the power gain from the PPP came from the exhaust change, 33% from pipe changes (under I/C) and 33% from ecu upgrade. Whilst I do not disput his words, I find it hard to believe that changing the pipework would make that much difference, although the pipes are smooth inside. I think I'll change to Samco when the DP gets changed.
Stan

 

Having a PPP meself and playing with bits of it i would say the gain was split as follows,

ECU 95%
Exhaust 4%
Pipework 1%

I think the pipework is a different layout underneath the IC which might help the flow of air?

Sunil

 

SAME HERE, WHEN I CHANGE THE DOWNPIPE I AM GOING TO CHANGE THE HOSES

 

I've a digi photo of the OE under-intercooler pipework that gets swapped out as part of PPP. It's a *little* restrictive.

If you saw it, you'd be keen to get rid of yours too

I don't think it's worth 30% of the PPP....but more than 1%. Sunil - did you ever try a back-to-back comparison with just the hosing? I wanted too....but can't be *rsed removing i/c again!

Richard

 

Dowser - so how are the the Samco/PPP pipes different ? - not so sharp bends ??
I assume they are same dia and start and end in the same place !!!
Not having stuck my head down there or seen PPP pipes I am curious as to how their design changes make a worthwhile difference.

Sunil - it makes you wonder why they bother with different hoses if they make such a small difference. I, too, find it more likely that the BB would give an extra 8 BHP (4%), but I'm only passing on what I was told !
I have the PPP ecu (not the pipework or PD BB) which made a great difference - [I already had a SS BB and centre pipe and cone filter, rising rate (FSE PB valve) regulator]
It would be interesting to fit just the pipework (instead of pipework +DP at the same time) to see if there were any noticeable differences - but too much hassle/expense !
Cheers
Stan

 

hi there
changing the intercooler hose should not realistically give any performance or power gain as sunilp said. it is only a hose?!. however the standard item splits under high boost pressure ( i know !!) and that is probably why Prodrive probably change them as the PPP runs higher boost than standard. i have not noticed any difference in the car what so ever after i got mine fitted, all i gained is the peace of mine that my intercooler hose is not going to split if i booted the car.

it takes alot more than that to get extra power out of the subaru engine, i wish it was that easy.

sam

 

If someone'll host the picture for me it'll be easier to picture it than my explaining

The OE junction where the single i/p from turbo splits into the dual i/p for i/c is a reinforced piece of plastic. The reinforcement restricts the diameter significantly.

The PPP junction is cast aluminium offering no (well, less!) restriction.

Richard

 

Just to clarify, i did not say its ONLY a hose. I did question, as i havent seen the underside of my IC lately, that it is a different layout, thereby aiding efficiency (question mark). Also, the Prodrive brochure describes it with words to the effect of "revised intercooler piping"

Sunil

 

You can get the Samco Hoses for about £50 +VAT as for the cast Aluminum split pipe under the inter cooler I think that would be a Prodrive part only.

Also just out of interest does anyone know what boost the PPP ECU provides, the standard ECU produces 1 BAR.

Darren.

 

I think the cast aluminium pipe is available from GGR, but undoubtly you will pay a premium for it!!