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Modding 4.5 Turbo

P

pavesi

New member
Hi, New here, found some great info on here so far.

Looking at getting a 4.5 Turbo ( not the S) in the next month or so. Anyone really modded their Cayenne? Hard to find much on them and how well they stand upto the extra power. Will have around 50k on the clock.

Plan on looking at the inlet, exhaust, intercoolers and a remap. Over 550bhp, Possible?? prob wont go as far as changing turbos etc. Dont suppose anyone has a compressor map for the turbo's so I can work out max boost / flow?

thanks

 
I'd give AET Turbos a call
http://www.aet-turbos.co.uk/

no bullshit, just straighforward engineering.
they have real mechanics & engineers who actually understand how these things work, and what can be achieved realistically
Spent a day with them last year on their Dyno...very impressive, both the dyno and the staff
 
Thanks will give them a shout. i used them many years ago for a Nissan Bluebird turbo very good service back then.
 
Found some stuff. K16 turbo's. Looks like max boost will be 1.2bar mid range dropping to 0.85bar at 6500rpm. That will be the turbo's flat out.

600bhp won't be possible with K16's though. Around 550 to 570bhp I reckon. Will do some more accurate calcs once I get a car.
 
Turbo is IHI RHF5 not a K16

Turbo IHI RHF5 max flow 10.8 m3/s 381CFM 2.8PR

No way it will make 600bhp more like 530 to 550bhp. The "S" makes 500bhp with the same turbos but @ 500rpm less. Max power is at 5500rpm.

RHF55 flows 476 CFM, now that is more like it. Could do 1.3bar of boost @6k and around 600bhp or maybe a touch more. Wonder how easy it would be to make the 5 into the 55.
 
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