HAS ANYONE CHANGED THERE MANIFOLD TO ONE OF THE ABOVE?
DO YOU GET MUCH OF A POWER GAIN FROM IT?
DOES IT MAKE THE CAR SOUND RUBBISH AS I HAVE HEARD SO MANY MIXED REVIEWS ON CHANGING THE MANIFOLD(IE-MINIMAL POWER GAIN,NO POWER GAIN,BIG POWER GAIN, LOTS MORE TORQUE etc..) IF ANYONE HAS ANY MORE INFO COULD YOU PLEASE LET ME KNOW AS I DONT WANT TO LAY OUT A GRAND FOR A LOAD OF RUBBISH. CHEERS

 

Just changed my downpipe for a scoobysport one, seems to have increased torque a fair bit and certainly seems to pick up much better. I'm not sure im fussed on the noise of it though. Might be blowing a little bit so i'm gonna get it checked out.

hope this helps

 

Downpipe! whose the NOOBIE then? (Just kidding)

Fitted the HKS manifold to mine. Gained a few extra horses at the top but at the expense of midrange torque and power. Dynoed car before and after. Exhaust note is VERY different. Sounds like a big bike now - seriously. Was convoying with my brother (Fellow Subaru owner) up the motorway and I booted it. He'd never heard the system before and said he actually looked round expecting a bike coming past!

Your mods are probably different to mine, so it may give you different results. Some people have reported MORE torque, but on the standard ECU I lost it overall throughout the revrange. A mappable ECU could probably allow you to make the most of it.

For a track car, I'd say they are ideal as they give you much more shove above 5000. My power curve is still rising at 6500 on a UK car (7K limiter).

I would also have thought better gas flow TO the turbo would reduce spool up time, but it appears to have INCREASED mine.

Hope this helps.

Rich

 

I have the SS manifold. I got it second hand.

Unless you have remapped the ECU and have a competent turbo I would not buy one new (cost) as it does need to be mapped around and the gains are nice but not MASSIVE.

I lost 200-300 RPM in boost threshold presumably due to the larger volume of the pipes, but over 4000 RPM it flows better.

[Edited by john banks - 7/22/2002 10:51:03 AM]

 

It is very dependent on turbo setup and the design of headers.

there is no way I would fit one to a standard ecu'd car.

 

Agree with John and Adam,

That's why I'm going for mappable ECU next.

Rich