MD321 v APS SR55
06 June 2006, 09:18 AM
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MD321 v APS SR55
Having placed numerous adverts in the wanted section for a replacement turbo, its now looking like I'll be having to buy "new".
I have shortlisted it to either the MD321 or an APS SR55.
Some spec on my 2001 Impreza:
2.5 Conversion
Wiseco pistons
Graham Goode Precision con rods
APS front mount
RCM 80mm Induction kit
RCM twin-plate with 5.2kg billet flywheel
6 Speed STi box
750cc (or 740??) Injectors
So what turbo shall I buy? and why? The car is currently undergoing a rebuild and the company carrying out the work have suggested the MD321.
Just looking for a second opinion.
I have shortlisted it to either the MD321 or an APS SR55.
Some spec on my 2001 Impreza:
2.5 Conversion
Wiseco pistons
Graham Goode Precision con rods
APS front mount
RCM 80mm Induction kit
RCM twin-plate with 5.2kg billet flywheel
6 Speed STi box
750cc (or 740??) Injectors
So what turbo shall I buy? and why? The car is currently undergoing a rebuild and the company carrying out the work have suggested the MD321.
Just looking for a second opinion.
06 June 2006, 09:21 AM
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Contact Andy who builds/deals with turbo's and mapping. Friendly and very knowledgeable. He'll be able to tell you the turbo you need for your spec:
http://www.andyforrestperformance.co.uk
http://www.andyforrestperformance.co.uk
06 June 2006, 09:32 AM
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Have had both. The sr55 lasted only 1400 miles (about £1 a mile) before cracking the exhaust housing. Have the md321 on now down on power from the APS (25bhp) as were running 401/400 now 376/401 so gained 1lb torque. I have been told its down to mapping. Time will tell as being remapped by a third party(Pat) in the next couple of weeks. Engine similar spec to yours. Hope this helps.
06 June 2006, 09:55 AM
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Originally Posted by scubbay
Hope this helps.
Bad news on the APS. Was it not covered under warranty or was it bought second hand?
06 June 2006, 12:36 PM
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Originally Posted by Scooby400
It does help, thank you very much. Keep me posted on your post map progress!
Bad news on the APS. Was it not covered under warranty or was it bought second hand?
Bad news on the APS. Was it not covered under warranty or was it bought second hand?
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06 June 2006, 01:59 PM
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Originally Posted by Scooby400
You'd think. Tried both lines and no answer.
06 June 2006, 02:03 PM
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Just been offered an Andy Forrest AFP6-49.
http://www.andyforrestperformance.co.uk/16307.html (scroll down!)
What do people make of it? Its based on a TD06 20g.
http://www.andyforrestperformance.co.uk/16307.html (scroll down!)
What do people make of it? Its based on a TD06 20g.
06 June 2006, 04:46 PM
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Originally Posted by Neilo
it would work nicely with a 2.5 mate.......how much is it going for?
07 June 2006, 10:39 AM
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Just been on the Scooby Mania site. They have some interesting turbos.
http://www.scoobymania.co.uk/perform...o.asp?c=4#here
Any experience anyone? The FP Red and FP Green turbo's look good.
http://www.scoobymania.co.uk/perform...o.asp?c=4#here
Any experience anyone? The FP Red and FP Green turbo's look good.
07 June 2006, 05:16 PM
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Originally Posted by Neilo
you wont be dissapointed.
I was just struggling to say yes as I also have a £5k bill coming in for my rebuild. But then I figured, why waste a £5k rebuild with a lame turbo (VF34)?
Thats just a waste of £5k!!
What is it they say? You have to speculate to accumulate!!
07 June 2006, 05:20 PM
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How does the MD321T compare with a GT30R 0.63AR rotated mount for spool up and power?
Just thinking that my rotated GT30R 0.82AR spooled to a bar of boost at 3000 RPM on a 2.5 and is a 520 BHP capable turbo - I would give it serious consideration on a built 2.5.
Surely you'll get a better power band out of something in its proper turbine housing rather than a P20 IHI?
Just thinking that my rotated GT30R 0.82AR spooled to a bar of boost at 3000 RPM on a 2.5 and is a 520 BHP capable turbo - I would give it serious consideration on a built 2.5.
Surely you'll get a better power band out of something in its proper turbine housing rather than a P20 IHI?
07 June 2006, 05:38 PM
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Originally Posted by john banks
How does the MD321T compare with a GT30R 0.63AR rotated mount for spool up and power?
Just thinking that my rotated GT30R 0.82AR spooled to a bar of boost at 3000 RPM on a 2.5 and is a 520 BHP capable turbo - I would give it serious consideration on a built 2.5.
Surely you'll get a better power band out of something in its proper turbine housing rather than a P20 IHI?
Just thinking that my rotated GT30R 0.82AR spooled to a bar of boost at 3000 RPM on a 2.5 and is a 520 BHP capable turbo - I would give it serious consideration on a built 2.5.
Surely you'll get a better power band out of something in its proper turbine housing rather than a P20 IHI?
That'll be one for Mark...
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