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Hi MD, so making plan for noisy tracks to bolt on another side exit . Currently under construction!

Hi Pieter , I would have thought deflecting noise into tarmac could amplify it. Not sure why I thought that as it could result in destructive interference .. .. noise reduction . I understood the exhaust on the 155 DTM were turned up to reduce noise and keep the power they achieved . I have bought m...

Hi MD, I’m gonna set up one as your drawn and take some db tests . Will let you know !

Hi Z, as the car was on axles stands in my store and we are not allowed any welding to take place , I had to cut all the all the pieces and build it in stages with sticky tape . After each section was looking good I got it spot welded next door then when the whole section was looking ok then I took ...

More pics

Finally some good weather combined with Classic Alfa Trackday at Goodwood. Unfortunately my GTV6 trackcar failed the DB test even with three silencers on the side exit pipe . I think the big bore “bass” is just to deep ! I was 102 db already at 4000rpm on a 98db day

Summer is here ! Cars are out. I have been working on another version of a side exit with two long straight through silencers with twin dual silencer. I think this should beat Goodwoods decibel meter !

Hi Pieter
How did your track day go as you mentioned one was coming up . I see Extreme tuning exhausts also do headers for 24v that don’t come upwards like yours but also merge in one just past the engine mount . Any sound clips ?

Some fun pics I took on a run last weekend to Goodwood

How has the final dyno session gone? What type of oil are you using in that motor ? Do you have a reservoir for cold oil to run back into turbo once you switch off . I saw this on a some factory Alfa turbos in SA

That’s a serious amount of work ! Out of interest what is the size of the valves on that head .. not that it makes massive difference with forced induction. We’re all exhaust tappets worn all juts that one ?

Edit ! See below

Thanks Wolfgang ! Crazy to see how small the counterweight is on. 2.0 V6 pulley . If you look at the same pulley type on the 3.2 the counter weight takes up nearly half the pulley.
What LS is in that gearbox ?

Thanks Wolfgang for sharing that. So much valuable information you have. Please keep us posted on progress . This engine is also used in my friends GTV6 so there is loads of interest on this set up !

That’s extremely neat ! Like the extension on the oil filler neck . The cold air intake with the drive by wire throttle body also very neat ! As Jim said keep those revs under 7800 with those valve springs will be fine. Question is do you really need to go above 7500rpm ? By the way MD also has his ...