can yer tell what it is?

[Teutonic_Tamer]

Roughly how much hp gain is this set up meant to give out of interest?
 

Technically and officially - none.  Although there will be some increase.  But I don't do rolling roads (well not until I get a remap  ), so I can't actually tell you how much gain it is giving.  But it is a definate improvement.

The main advantage of bigger and/or additional intercoolers is a considerably more stable output even under very high ambient and underbonnet temperatures.  These really come into their own if you have other tuning work done as well, from a simple remap, through to zorsts, hi-flow sports cats, bigger turbos, uprated injectors and fuel pumps, etc.

TT, so you still have your MK5? I thought you crossed into AUDI territory fully? 

Still have both!  To be really pedantic, the Mk5 is SWMBOs, and the RS4 is mine, but we each drive each others.     

Oh, and the Forge is achieving an extra 10-12 ponies, so what both the Forge and the S3 together add - maybe 20 ponies?

[Peskarik]

If I had RS4, I'd never be able to let my wife drive it. What if she hurt it? 

[Saint Steve]

If I had RS4, I'd never be able to let my wife drive it. What if she hurt it? 

i dread to think, poor lass! lol

[chungster]

TT...what's your view on the "pressure drop" theory then of more space/area for air to occupy? i.e. Turbo having to work harder to keep whole system pressurised and hitting right levels of boost at intake manifold point?

[Peskarik]

TT, I have a question also.

WHen you install an S3 intercooler in E30, doesn't your power drop because of less pressure in the system? More to the point, if, say I, tune my E30 to 320hp without putting in new intercooler, and then decide to put the S3 intercooler in, would my output drop?

(WHy I ask, because I remember Wolfbane said hat he first had a remap, and then S3 intercooler, and output dropped)

[topher]

higher boost pressure is not necessarily the best thing.. the same amount of air is being still shifted, its all about cfms!

[Teutonic_Tamer]

I need to have a think about this - and it's dinner time, but I've just notice Toph has basically hit the nail on the head! 

[Peskarik]

I need to have a think about this - and it's dinner time, but I've just notice Toph has basically hit the nail on the head! 

please, think about my question, too. I rely on your expertise.

[Teutonic_Tamer]

TT...what's your view on the "pressure drop" theory then of more space/area for air to occupy? i.e. Turbo having to work harder to keep whole system pressurised and hitting right levels of boost at intake manifold point?

As Toph indicates, it is not the actuall pressure of the turbo, but the volume of air which is being flowed into an engine.  So even if it did cause a pressure drop, that would actually be and advantage, because the cut off valve (dump valve or recirc valve) won't be venting, so the turbo will stay at max spool.

[topher]

please, think about my question, too. I rely on your expertise.

questioning my expertise, gasp!

I do have a question though TT, how noticable is the lag increase with the S3/twintercooler assembly? I would imagine negligible, as its not an overly substantial increase in volume to the 'charged' system.. but i've never driven one so I'm curious.