Just Brought R33 Gtst With Rb3025 , Gt35R Etc

[BMYHOE]

Hey Guys,

i just brought a r33 gtst with rb3025 in it, motor has been rebuilt around 20K ago with fCP pistons, spool rods, nitto pump etc.

turbo set up is a garrett GT35R T3 0.82 external gate. running ebay exhaust manifold & wastegate & 3 inch exhaust system.

here is a dyno graph i got when i brought the car looks to have a slight boost drop, and very wavey boost line is this normal?

or could that be casued by the shit manifold & wastgate? or the 3ich exhaust system?

r33 dyno 5 9 11.pdf

[zebra]

Could be a combination of a badly setup boost controller and the china manifold

[R.3.2.G.T.R]

It's most likely due to 250rpm increments it's looks more wavey than normal 500rpm increment

[BMYHOE]

yeah i thought i could be the manifold wastegate set up.

im going to throw some ID1000cc injectors in her add anthor 044 pump, change to the exhaust to a 3.5inch the whole way and add a Eboost2.

then see how she goes on around 25psi..

if i still have boost issues i guess 6boost manifold and good wastegate will go on..

Edited October 20, 2011 by BMYHOE

[Trozzle]

For the love of God, it's BOUGHT!!!

[BMYHOE]

For the love of God, it's BOUGHT!!!

i was close

[Harey]

The wavy part is just certain type of dynos do that I understand.

Yeah the poor boost control would be the china manifold.

So strange with a quality 2530 engine build with all the good stuff and a nice GT35R and then a cheap ebay china exhaust manifold??

[Hanaldo]

For the love of God, it's BOUGHT!!!

[R31Nismoid]

Could be a combination of a badly setup boost controller and the china manifold

+1 and the 3" exhaust.

Realistically it should be 20-24psi and well over 350rwkw.

[methz]

nothing wrong with china manifolds. If setup correctly and modified right.

[Guilt-Toy]

nothing wrong with china manifolds. If setup correctly and modified right.

i got 4 years out of mine.. as long as you brace them and dont hang the exhaust on them they work quite good... I ran a 10 on mine.

only going to make a new one now because the exhaust was hung on it and it cracked again and we can just remake one at the shop in 2 days.

[BMYHOE]

i got 4 years out of mine.. as long as you brace them and dont hang the exhaust on them they work quite good... I ran a 10 on mine.

only going to make a new one now because the exhaust was hung on it and it cracked again and we can just remake one at the shop in 2 days.

hi Guilt toy,

i knew you had one on yours after lots of reading in the forums..

so im hoping the probelm could be the 3inch exhaust.. and or the cat as i just brought the car its hard to know whats going on,,

what wastegate and exhaust system you running guilt?

[NYTSKY]

What happened to your big 2630 motor?

[BMYHOE]

its sitting on the floor waiting for my S14 shell to be finished.

to be honest im going through court with the people spraying it as they have had my car and money for well over 7 months now, and the car is still not near finished.

lots of hard earned money and stress has been pored into the s14.

i just went and brought something to get my mind off sh!t,

[Room42]

Man I have a gt3582r with a 6boost manifold, 50mm turbosmart gate, 3 inch turbo back exhaust and a stock cat. It is sucking through a z32 afm. So far I have run 20 psi and it is rock solid till my 7600 redline.

Based on my car I doubt it is your exhaust or your cat causing havoc.

[BMYHOE]

Man I have a gt3582r with a 6boost manifold, 50mm turbosmart gate, 3 inch turbo back exhaust and a stock cat. It is sucking through a z32 afm. So far I have run 20 psi and it is rock solid till my 7600 redline.

Based on my car I doubt it is your exhaust or your cat causing havoc.

well thats good to hear.

just wounder what RWKW it makes and what fuel?

i just seen my R33 has a GFB manual boost Tee not sure if this is the cause also.

[Room42]

I use a manual boost tee. Not sure of power yet. 98 octane fuel.

[methz]

Only thing i done 2 my $75 stainless manifold was cut between the runners so each runner bolts down seperately and seals perfect. got my tuner to die grind wastegate port out into 50mm hole with new piping welding on 2 suit new gate and perfecto.

[R31Nismoid]

Based on my car I doubt it is your exhaust or your cat causing havoc.

Without looking at the exhaust it's impossible to say that.

A lot of jap "3 inch" exhausts actually have a 2.5-2.75 inch reducer internally where the mufflers start to reduce noise.

So they are not true 3 inch systems at all.

Without testing it, you cannot tell.

Easiest way to do so, get it on a dyno and do a before/after - after being dropping it from the dump pipe.

[Room42]

Without looking at the exhaust it's impossible to say that.

A lot of jap "3 inch" exhausts actually have a 2.5-2.75 inch reducer internally where the mufflers start to reduce noise.

So they are not true 3 inch systems at all.

Without testing it, you cannot tell.

Easiest way to do so, get it on a dyno and do a before/after - after being dropping it from the dump pipe.

I was going to say something like that but was on my phone at work "hiding in the corner" so to speak.

We have different exhaust systems and what R31Nismoid says is correct. Just disconnect your dump from your front pipe, wire the front pipe up nice and high and go for a quick drive. Be aware that you will blow soot everywhere and possibly melt some wiring if you drive for very long. You will soon know if it is the exhaust making it lose boost or not. I tried running my car straight out the turbo very briefly when putting my setup together. My car lost 3 psi from putting the exhaust on but still held whatever boost till redline.

Edited October 21, 2011 by Room42