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[Jwsturner]

Has anyone fitted the Pumaspeed down pipe on a 1.6 tdci 90bhp Fez?

http://www.pumaspeed...ON-DPF_1142.jsp

Are the gains as good as it says?

[FOCA]

What gains?

 

Iv read through it and could not see any claims or figures

 

 

Although there are no actual figures in general i would expect a significant improvement in performance with the pumaspeed performance downpipe (i would cal it a decat decat/ downpipe)

 

The cat on these cars is very restrictive, demoving it and replacing it with a pipe reduces the back-pressure(downstream of the turbine) / improves gas flow and scavenging on the turbine (the exhaust part of the turbo)  

 

 - because the turbine spools up quicker the compressor spools up quicker too

 

(reducing lag/ improving throttle response) so the boost comes in quicker - improving midrange torque/ power - the actual peak boost pressure stays the same (it is controlled by the actuator/ ECU/ wastegate or VNT) so its safe, the cat is not nessesary for a UK MOT at present

 

The free -flow (scavenging/ breathing) of the exhaust gasses helps the top end power helps the engine rev  

 

Its a bit expensive for a decat, but you get a decat, downpipe and flexi in one unit

 

Probably to get the full benifit of this, you would need a performance exhaust (replace the restrictive baffles with "straight-through" silencers) and a remap as well as improvements to the air intake - all these things together woud probably give "serious" gains

 

(a remap at the least - because it would give the biggest gain for the least outlay)  

 

An injector upgrade, larger FMIC and hybrid (larger) turbo set up right could potentially give 140-150hp i recon though these things would be expensive and not shure about the cost effectiveness.