firstly, to answer sudsonic, yes threaded boss and blank could be integrated into the pipework if required, so long as we knew what thread and position was required, which varies according to the sensor/system used,we could do that as an extra.
secondly, many many thanks to Adie (AHM) who again has been more than forthcoming and openly approachable with regards to his own race car set up and proven pipework details. he didn't have to share his knowledge and experience, but has done on more than one occasion, and so many thanks Adie, you're a star and thank you very much, and this thread is much more interesting and exciting thanks to your input.
so, on to todays business, which has been to build a full race manifold, for a 33, which was previously a very strong 8v, but is now receiving the fully sorted 1800cc 16v motor for this season.
they had a manifold which had been designed and built, clearly by a very competent engineer, cosworth F1 no less, and very nice it was too, but by comparison with other racers cars, the primaries appeared to be quite long. Put this along with the fact that the new motor is a 16v, in a higher state of tune and more available rev's, it was clear something had to be done.
this is the original system.
bore sizes are good, for a larger high revving engine in particular, so we've pretty much kept to them in the new manifold.
so the primaries are 1 3/4", into 2" secondaries, and the final third pipe leading into the system jumps up to 2 1/2".
and this is the new shortened layout, with extra forming to work around the expanded volume sump pan that this car has.
very very sadly, the engine you see is not the new race engine, it is simply a dummy for us to bolt up to and build from, so it does not run, and we could not hear it, but i reckon it will sound ther mutts nutts!
one vital point, illustrated next, is the ground clearance issue.
obviously a huge advantage of this style of layout, as the only compromise to ground clearance comes from the use of larger bore pipe over the standard exhaust, so the exhaust sits either equally or only fractionally different to stock depending in pipe size choice.
i'm pretty sure that the car will be dyno'ed once completed, so i for one am very excited to see the outcome of this new set up, but i don't know how sson that is likely to happen.
i am also invited to return and see the car once fully rebuilt, to take better pictures and video footage of it, so that should be cool too.
for now, all the best, i'm, off to my pit,
it has ben a long day!