i did think that after i wrote it!
Should anything major go wrong then the car will be Broken down quicker than the arsenal defence was a few weeks ago... and i hope the car can hear me!

Alternator.... Done
Apexi.... Done
3 bar map sensor.... Done

Judgement Day tomorrow!!
come on peeps get your guesses in...

nick

354bhp / 340lbs

that's pretty much the same figures vas made with your old turbo... At just 1.2 bar..... Yours was 63ar exaust housing though wasn't it??

nick

that, 355/350

higher boost so a bit more torque. Just a guess but I think that .55 will max it's flow up top at around 350 unless you have a level (stage) turbine 3-5, the .63 would flow more of course.

yeah i know what your saying about the 63 housing but i think i'll prefer earlier spool/torque over top end figures though.... Whatever the result i think it will be a superb fast ROAD car by the time fleas finished....

nick

Turbo Technics quote up to 400BHP on a .55 exhaust housing and upto 480BHP on a .63 - so it should be OK.

that on a stage 1 turbine or stage 3?

I can't remember which you have nick but if stage 1 we will know tomorrow

and I agree for a road car it will be ideal, my .48 (stage 2), flea chipped, was a great street turbo

Stage III I believe

Thought so, I don't think Nick has a stage 3 hence my lower guess

My point was, the A/R of the turbine housing is not a limiting factor....

Of course the turbine wheel itself could be a problem. But there are other unknowns which prevent me from taking a guess at the final BHP figure. What revs will the head sustain without significant flow losses and what boost will Flea be able to hold at higher revs with the ECU/Apexi?

On my engine (with different management) a very similar turbo would sustain 1.7 bar from 4000 - 7500 RPM or 1.8 bar from 4000 to 6900 RPM. If Flea only gets to hold 1 bar at 7000 RPM, for example, the engine output will be significantly different.

would the turbine housing had to have been machined to accept a stage 3 wheel?? If so then i believe i only have stage 1??

yes it would. I think you have stage 1 also

just read your tuning guide again saint.... So the turbine wheel is the one that is mainly affects lag... So even though top end will be sacrificed my turbo should 'switch on' not far off as quickly as a standard one!?

nick

good luck for today Nick!

cheers marko.....
not on dyno today.... But will have some performance feedback to report!!

nick

would normaly not bother but...

my name is MARCO!!!!!!!

sorry Marko!...........

It's not quite that simple as your OE size turbine is driving a bigger compressor (fan) so it takes more torque on the shaft to get the bigger compressor turning which raises boost threshold (commonly known as more lag, though not strictly correct). In general terms, and only looking at the wheels on the shaft, not housings, it is the turbine that effects boost threshold more. Once you move beyond wheels to the overall turbo package exhaust a/r has a large impact. Turbo companies offer changes to A/R not turbine size these days to change the boost character, the old T3/4 models had the different trim and stage offerings

Yeah, the .55 will switch on pretty quick with a stage 1 - will be good

Words can not descride how much that makes my blood boil.

Tell us what happened with the car you slag !

the cutting out prob came back after about 40 mins of mapping but i think flea has come up with a solution which will allow him to get HIS job done, but i will prob have to get auto electrician to sort problem properly once i have car back!
fingers crossed for some news today!??

p.s. Sorry Marco...... I have a friend called Marko... That'll be why i spelt it like that...... You slag!

ok, Nick_slag...

look forward to your results!

Another problem!!
nothing major.... Wastegate needs adjusting as flea can only get boost to spike to 0.9bar then hold 0.7bar so hopefully adjusting actuator rod length will allow more boost!?
i had mentioned to leighton that it may need adjusting as a different exhaust housing had been bolted on weeks after getting it from my turbo guy so there was a good chance the actuator length wasn't right!
adjustment tomorrow a.m.
1.7 bar by p.m. ....

nick

2 days and still no word....

Your becoming worse than me

boost leaks galore..... Think flea has already sorted 3 and there is still more..... May have to get it on the dyno and under load to find the last one......

nick

Sorry, but

Nice one...... MATE!
when it all comes together..... No... IF It all comes together it will be fantastic, i'm sure!
just because you're engine was built properly begbie!!

you evil feeeecker!!

Trust me boost leaks were the least of begbies worries