Fuel system pressurisation noises in hot weather

[Targarama]

Just got back from a drive, car was in queueing traffic for last 15 minutes or so (thank the lord for aircon). Now, I know from previous TVRs that the fuel pumps can get a bit noisy when really hot - and my T350 one was whining a bit. Got home, got out and there was a 'phhhhhhhhhhhhh' noise coming from the fuel filler. I knew it was excess pressure in the fuel system. Now why do TVRs have this 'feature' while most cars don't? Mine is a nearly new model so has whather they did to improve the filler/breather. It's embarrassing to have your car making a whining noise for 30 minutes after parking up.

I opened the filler flap a smidgette and let off the pressure so it quietened down after it was still farting 10 minutes later.

[blueyes]

"They all do that sir.. even after the modification"

[rolex]

The sounds you are hearing are the magazines continuing to spin after all the rounds have been discharged through the rear gatling guns.