I would remove the first one and left just the rear one!
Becouse heat would exit much faster and cool much faster till it gets to rear silencer!
Wich diameter of piping are you using?

3" all the way from the turbo

good luck Rob...

thanks carlos how are you getting on with yours?

for now everything is fine, just have to do many hours of road,and I have to go up because it is really very low,tomorow hehehe...I"m realy happy...

What Carlos means is that he needs to set the coilovers to higher ride heigt cause the car is really low at the moment...

just trying to help...

Called in today but i was too early as there was just a 127bhp mini on his rollers I`l try pop in on thursday to see the Beast.

Dave

glad your happy with it..
we will be running it up thursday, not much happening tomorrow just the wiring but barbz, rob, john and i will be there on thursday for the mapping...had my exhaust repaired today as well...i'd blown a 6" long split/flap in the first silencer...all i can say is that its a good job its a lifetime guarrantee as i'd done that on 1/2 a bar of boost...i'll post thursday night with what happens on the day

Good luck Rob - see her in the flesh soon?

for sure i will be attending various events in her

Dependant on circumstances outwith my control, I may also pop in tomorrow mate... probably with barbz!!

Ross

why not the more the merrier

Hope all go,s well tommorrow rob


paul.

Any news, Did she or didn't she?

she didn't!
just to quash some of the rumours ( i heard about my own car!) she blew bits of exhaust out then the first box was just hollow (causing all sorts of turbulence etc) so we removed it and gained 50bhp straight away..the down pipe is too restrictive which is making the manifold glow very quickly so as is often the case with new territory it's back to the drawing board..we think the external gate pipework is too short and coming into the down pipe at too great an angle so the gasses are setting up serious turbulence/resonance causing the gasses from the manifold to back up.. you can hear it, compared to robs it sounds choked and as i say even though the manifold is ceramic coated inside and out it glows very quickly..even so we made just over 300 at 1 bar where robs makes 40 or so more at the same point.. and we made nearly as much torque which is a suprise..we turned the boost up and saw 360 but it was obvious we had issues so left it before doing harm... we will cut the external gate pipe away from the down pipe and see what happens with a screamer next..
i will share the fortunes and misfortunes now as so many people are asking whats been going on..
our biggest problem is space and heat as the turbo and manifold are so big as well as the wastegate and its plumbing it's all pretty cramped and theres a lot of very hot things in a small space so i am considering venting the bonnet to let it out (no silly scoops!)
luckily our exhaust guy is very good and is eager to find a solution..he didn't have many options with our serious lack of space so now we have tried the simplest solution, he will try another aproach (free of charge thankfully)

the main thing though is the engine itself runs very nicely..it's quite,starts straight away evrytime and idles well,even though they get warm on the dyno the oil pressure never dipped below 2.5 bar so when we get the bolt on bits sorted i am confident it will be as good as i hope

just take your TIME, don't expect 500hp in an instant, won't happen.

It took me a long long time to get to just 440hp & even though I can now surpass this, I'm happy to leave be, just ensure you have a driveable lump & that the power range is a broad a possible pal.

With some tweaking, you'll see your goal, but just accept it takes time & refinement, as it's ALSO VERY easy to ruin all that work in a few secs on a dyno.

Good luck & stay +ve.

good luck mate, and take it easy!;-)

for those still interested ..we removed the down pipe and cut the external gate pipework away from the down pipe and again we gained near 50bhp which has taken us over 400bhp so we have gained over 100bhp from removing restrictions from the hot side but still it's not giving all it can by a long shot it seems we have some sort of restriction still which can only be the manifold itself..
now having spent well over £1200 on it then another £200 ceramic coating inside and out i am going to be mighty upset if it is as we suspect the culprit...
i am no exhaust guru so i hope someone with knowledge can chip in here as i was told the manifold was good for over 600bhp by the (very well thought of in the tuning world) manufacturer..i told them i was doing a 2.4 so would have expected them to tell me if there was any possible issues..
on contacting them they say it makes no difference it will flow over 600 with 5x36ml internal diameter primaries..
to me that does not sound right as the 2.5 (which mine is) is a long stroke engine so the pulses will be different as will the shear amount of gasses flowing..
rob had a 2871r on his 2.4 and it gave positive boost just off idle and was on full boost by 2800 revs..it then choked up at 5500 i think and it didn't want to rev on (sorry if i am a little inaccurate rob but its about right)..the point being the same turbo on a 2.0l is not on full boost untill 4k+ and will rev out not choking up at all..to my mind(limited knowledge accepted) thats down to shear amount of gasses..if this is the case then what makes 600+ for a 2.ol would likely not for a 2.5..
can anyone confirm this?

my next move is to have one custom made in italy to my own spec..
here though i have a problem in so much as i am not sure what size primaries to order as too small and i wont make the power,too big i lose all bottom end..though i don't think its anywhere near as much as with an n/a..the manufacurer thinks 38 should do but with 36 only making 407 i am dubious and think maybe 40 at least it will definately make the power..the new design type has longer ones also
will be interested to hear opinions on this

what manifold did johnS use then because he was running 550+ on the 2.4 design lump?

empty your pm's aswell ktm

Why not take it of and have it flow tested?

john used one from scara with he thinks only 35mm id which is the standard one they sell but if thats so it can only be that it used longer tubes with less tight bends as its actually smaller though a completely different design

Ever thought of running a 4" downpipe and exhaust system?

its probably not worth 4" as the vband on the turbo is 2.5 as the turbo itself is only 2.5 on the hot side(they are all like that) but it goes straight to 3".. i am considering a 3.5 downpipe though..we are removing the aircon and redesigning exhaust

well, at least you have managed 400bhp with out hardly any effort Rob!

good on you!

what boost did it hit 400bhp at?

really sounds like you have a nightmare with the exhaust set up.

a 3.5" sounds like it will free it up a bit more... its going to be a long trial and error game now mate!

stick with it mate! your not far from the finish line

You need to measure your EGTs to work out where the restriction is

My guess is that its the 2.5" V-Band - 5-stud flange would be less restrictive

thats what we thought but the turbos come like that with a 2.5" outlet and they are hapily making over 600 on other strokers ..we are external gate so don't need a 5 stud bet we thought 3" would have been better

Have you changed the manifold yet rob? Or are you still trying to source one?

Ross