what size exhaust tube/elbow etc for my setup?

[turbomike]

sounds a very interesting car,would be interested to see pics of car/engine posted up

[CNHSS1]

no worries, will do monday mate

[s13eater]

yeah craig, i was tol 340/400 bhp, i did have pics of it, the guy who bought the engine sent me some on my old pc, it had graham walker on it in big block letters.

[s13eater]

[sideways danny]

back to the original question, 2.5 inch should be big enough for 300bhp, the difference in size from 2.5 inch to 3 inch will change how and where you get the power really

[CNHSS1]

Thats the one! i have soem techie pics and half a dozen of the engien bay i will post tomorrow.

Danny
for packaging reasons 2.5 would suit me better, can you elaborate on the differences in delivery? also any idea on the differnce in noise levels between the two as we have to meet static noise tests at every vent and drive by at some too. i was trying to get away without running a silencer you see, altho the exh will be longer than i cuurently use as it wille xit out of the rear of the car

[sideways danny]

going for a slightly smaller bore should give you a little better off boost response . The 2.5 inch system on Lou's s12 has a single silencer and is seriously loud, probably louder than a blitz NUR. I doubt you'll pass scrutineering without any silencers, you'll probably need a cherrybomb style middle box and a sensible backbox at the very least