top speed?

[s33vem]

rite so im on a run way just to clear this up, my mk3 cupra is completly standard except from porker rims with 195/40/16, seeing wot my top speed would b and i got 145 'ish' mph which i thought was pretty impressive. then i fit a piper x viper kit and i only get 135 mph. do u think this is due to the air filter? also my engine managment light is on but i havnt lost boost except for the top end got no faults just needs resetting. any1 else had this?

 

[evo2345]

iv heard the piper viper kits can be restictive, if i was u i smooth your aibox out and run a green cotton panel air filer see if that makes any difference

 

[Roelích]

145? You kidding?

Seems high to me, although speedo's do overread.

 

[s33vem]

145? You kidding?

Seems high to me, although speedo's do overread.

flat out mate! giving it all it had wouldnt of thought the speedo would b out by that much? dunno what the book top speed is does any1 no?

 

[Forbez]

Perhaps the filter has oiled the maf, and thats gone boobies skyward.

 

[DaNnY_LaD]

Jetex Filter FTW...

 

[rhysox]

hope that was on a private road.. be careful about posting these sort of things on forums too, not because everyone will think you're a ******** (which im sure they will ) but police have been known to get involved over claims on forums. seen it before...

so be careful!!

 

[rogers]

overiousley on a private track iv sat at 155 thats was on sat nav unit so its a definate speed so............

 

[pdcupra]

He said

rite so im on a run way just to clear this up,

 

[jivejester]

overiousley on a private track iv sat at 155 thats was on sat nav unit so its a definate speed so............

Ditto many times, and probably on the same private track

 

[cus]

weather conditions? warmer day on the second run? piperx filters are oily as well.

 

[s33vem]

i was on a run way honestly!! i posted this to see the reason 4 the difference in speed cause of the airfilter, im not boasting how fast the car is cus its standard and theres loads of people wiv engine mods that wud think that was slow in comparision. obviously i dont drive foot to the floor everywere but just wondered if ne1 wud no y there was a difference of 10mph thought that was alot really?

 

[cus]

the filters are really oily and not good for the MAF. if you had an engine warning light on, then maybe; without you noticing, your car was overfueling, or underfueling etc. could be anything

i'd get a greencotton or at least a filter which isn't oily

 

[truCido]

you might find that the air pipe was being squished with pressure therefore restricting the amount of air because it was sucking so much, or plain and simply heat soak depending on cooling to it...

145 on the speedo is probably actually about 125

 

[r8byb]

Can airfilters really affect the car's acceleration/top speed that much then, ive been told to get one of those long chrome pipes and a green cotton air filter to locate down in the wing ? Currently have an enclosed BMC

 

[Myki da Pyki]

As far as im aware a standard mapped car is restricted to 135mph so 145 out of the question

 

[CupraStoo]

a friend of mine had a saxo VTR when i was younger, and that lost about 10MPH flat out after a KandN was fitted!

 

[Robbie C]

When using my Snooper I found the speedo to over-read by 6MPH

 

[truCido]

I think its usually about 5 - 10% out, unless you've changed wheels etc

 

[ian_cupra]

yeah speedo's are fairly good even at those speeds, mine over reads by 6 mph all the way thru the range of the speedo. most air filters restrict top speed from what i've found, there better lower down the rev range.