new exhaust -

for the car not me!!! Anyhow I had the chance of a Mongoose aftermarket jobbie so I had it put on in a straight swap for the std tubby exhaust. Er well the Mongoose was certainly throaty but more noticable was the drone it produced! My god was it awful. It was always loud and between 50-70mph the drone was enough to drown out the stereo.

The clincher came when during the highland drive I removed the t-bars and I couldn't believe the noise. I mean it sounded good on full chat which is fine, but just casually bend swinging along the road was too much. It had to go.

I found a Fujistubo Giken Twin for sale on IMOC so I bought it. Now it had a couple of dents on the silencer but nothing that looked too serious and knowing this beforehand I still chose to buy it. This exhaust is known to be pretty quiet so I bought it with this in mind. Also, it was fully stainless so no worries about that ole rust issue.

When it arrived I couldn't believe the size of the outlets! Must be 4inch and I'm thinking no way is this gonna be quiet. Anyway, I'd bought it so what the heck might as well fit it. Can't be worse than the Mongoose that's for sure. So we fitted the Giken and then cranked the engine. Now the guys that fitted it, Caluma and Larry were convinced this thing was going to be LOUD and I wasn't convinced they were wrong but to our amazement it is a quiet puppy. One might argue boring but at least it won't deafen me. Some pics of the puppy complete with dent lol.

Ignore rover though it did transport the mechanic over ;-)



worm eye view..

funny old world -

ok so been monitoring the air intake temps really really closely and found some weird stuff happening. Under hard boost conditions the intake temps are well down on the std air to air unit which is to be expected.

However at idle the intake temps rocket from high 20degC to very quickly over 50degC! Now a chargecooled lump should be much more stable than that so it got me thinking about the coolant pump I got cheaply. So I borrowed the recommended expensive Bosch unit and impressive though it's flowrate was the temp control at idle was no better.

The kick in the nuts is that when the cc pump is disabled at idle, the temps rise no differently that if the pump was running!!! Beats the hell of me. In an even more mind puzzling (for me) trick by raising the revs from 750rpm to 1200rpm while still in neutral and sat still, the intake temps fall back down to something reasonable. Going to do some checking on the cc coolant temps and see what they are doing cause something aint doing the job that was expected of it :-(

Under hard boost the chargecooler works almost as expected and way better than the std air to air unit. However there is something amiss and solving that will give us better results all round.

On another note, the Mongoose exhaust was fitted. It's a fair bit louder and has a drone at 3-4krpm which isn't ideal. It does sound well hard though so we'll see where it goes from here.