Tuning turbo time!

[Munkul]

glad you took my advice then

Im going down a different route to free up top end rpm - basically i have a very restrictive exhaust because i get major boost creep with a free-flowing system (although felt a lot faster til hitting boost cut!). So atm it tails off after 6000.

Thats with a GT1549 compressor A/R .43; turbine A/R .34, 0.8bar at top end and 0.6-0.7bar through the rev range. 160bhp at 5800rpm last time it was RR'ed.

Im putting a larger external wastegate in with screamer pipe, so less gas needs to flow through the system, and hopefully should gain a few top end bhpz from the wastegate alone, and can put a less restrictive system on at a later date.

Anyways thats why i asked about boost creep.

 

[craigb244]

ahhh what exhaust you got?
Got mine done by a guy well known within the motorsport club im in.
its 2"bore stainless dont think there is any back pressure

dad put a new sticker on for me

 

[Munkul]

2" downpipe, 1 3/4" straight midsection and supersprint backbox.

Changed the supersprint backbox for a custom hodge-podge of 2 1/4" pipe and backbox, and instantly started boosting over 1.2 bar at high rpm (lucky i didnt blow anything because the injectors were maxed out and running lean)
Changed it back the same night.
Funnily enough it never overboosted with the same backbox and a sports cat in the midpipe, but i exploded the cat with launch, fun times
It felt loads faster, which is to be expected with that much extra boost i suppose... but better up top end as well.
so anyways EWG is whats happening next.

 

[craigb244]

had a PCA (autotest) yesterday.
getting better at it now (half decent lock on the steering helps:doh
Came 5th in class and 9th overall

almost put the car into a ditch on the morning as it was VERY damp and lost the back end on a very fast test.

Thanks to munkel for giving me the settings for launch control. had a lot of people coming over asking me to do it haha

uploaded a video on youtube of an charity event we had at the end of the day.
at the start of the video you can hear the launch control working :devil: (only real time I used it as it just caused massive wheel spin and lose loads of time)

 

[craigb244]

just recorded a quick video of my launch control.
feel like a right chav but love it haha guess its not chav its just what they wish they had with them flamer kit... but mines the real thing!

 

[gazzaman2k]

awesome nice work cant wait to get my ms setup on my turbo again

 

[a1ant]

Haha wicked! Nice work Craig.

Marshmallows anyone? :devil:

 

[craigb244]

Haha wicked! Nice work Craig.

Marshmallows anyone? :devil:

can it be used as an effective way to remove tailgaters? :devil:

 

[woj]

can it be used as an effective way to remove tailgaters? :devil:

Oh, I always dream about something like that when some stupid dumbass sits on my bumber not realizing the power of my brakes and my will to do something stupid :devil:

 

[Munkul]

noice... ive never had big flames like that, im jealous lol

 

[craigb244]

they get better but the bangs are silly loud!! tested it the night after bonfire night and people where looking out there windows.

going on my weekly social night later so ill get a better video there

 

[Munkul]

it should or will be the sort of volume that if you stand behind it, it will blow both eardrums and feel like a kick in the chest from the pressure wave :slayer: Middle of town not reccomended... unless you know no cops are about!

 

[craigb244]

mewahaha better video

 

[Dan]

perfect.

 

[Karolis]

I was watching the videos on youtube, there's a big sound difference, I suppose dued to the turbo changing, or it's simply different recording device?

By the way, big good job, love to see this stuff and work with my fantasy... When I'll have some money to start to spend, I'll start to bomb all the forum with specific questions about doing a turbo 1242 heheheh

Like I said, :worship::yum::slayer:

 

[craigb244]

thanks
which videos do you notice a sound difference in?

in my very old videos the car was non turbo.
and recent ones I have a new turbo which is a lot more free flowing so the exhaust sounds deeper and a bit louder.

 

[Karolis]

I mean these two for older ones.





Here it sounds totally different:

 

[craigb244]

ahhhh yeh the first two videos are from when i first fitted the turbo and it had a very badly made exhaust with a huge twin centre exit loud thing that came with the doner car.

replaced within a week or two with my current system which is very quiet

 

[craigb244]

another video that my mate recorded.
glad my car still sounds like an airplane
the acceleration between 50-55 seconds looks mad

 

[Karolis]

Have you done any dyno tests?

What boost do you run?