What's Wrong With My Car?

[black sky]

Hi Guy's

Took my car do to guilt-toy for him to unlock my power FC yesterday since Croydon locked it that's a whole other story that I’ll let him explain.

so we went for a little road tune. Now my car is a r32 gtr with r34 N1's the bigger ones apparently. I have a GReddy Profec B Spec II Boost controller and with it switched off it makes only 6 psi now that doesn't seem right since i thought that they had a 14 psi spring on the wastgate.

anyway we went for a drive it's laggy as all fck and it makes 6 psi (boost controller off) at around 5500rpm or latter.

Now this issue of lag has been around since i had the car it's alway's felt laggy but it was at least making 14psi before but with heaps of lag. like i said in previous topics it just didn't feel like a GTR.

Nismoid i told you it was laggy, u said i had a half baked set up remember. i said other people were getting better response out of there same set up. You still said it was half baked, you bell-end, for a helpful moderator your as useful as a cock flavoured lolly pop.

we turned the boost controller up it's set for 14psi and it wouldn't make anything more than 12psi we turned all the boost controller setting to max and still only 12psi Guilt toy has made the car much much more responsive and you can feel it pulling up top but

1. it's very very laggy it's making the 12 psi very very late probablly close to 7000rpm

2. not going past 12 psi boost no matter what i do.

i'll post a list of the mods but any ideas or thoughts would be appreciated.

Cheers

Anthony

ACL Forged Pistons

ACL Piston Rings

ACL Big End Bearings

ACL Main Bearings

Ported and polished head

Stock polished crank and rods

Bored and honed Block

N1 Oil pump

N1 Water pump

Tomei Oil Gallery restrictor

Gates timing belt

New engine gaskets all round

New Thermostat

New NGK spark plugs

R34 GTR injectors

R34N1 turbos C106/GT25 A/R 0.60/0.64

New Rod bolts, welsh plugs

3" Trust Front pipe and Power Extreme II Cat back Exhaust

3" Metal cat

Twin Apexi Pods

Apexi Power FC & Hand Controller

Greddy Profec B Spec II boost controller

Nismo fuel pump

Edited October 4, 2008 by black sky

[R31Nismoid]

I was spot on the money at the time I remember very well (see the links below), given the information you provided. Doesnt sound like i'm much off even now.

To actually make it clear (because your obviously a weee bit confused) i was talking about CAM GEARS and the fact your tuner said there were no gains to be had which is absolute rubbish. Being both the threads were, you guessed it, about cam gears.

How many people on this forum then told you about cam gears yet you still didnt listen?

http://www.skylinesaustralia.com/forums/R3...La-t168952.html

http://www.skylinesaustralia.com/forums/Rb...rs-t158108.html

So anyway, not you've had your spasm... we've actually now been given something meaningful in terms of trial/error etc. It does now sound like you've got actuator issues, have you checked and made sure they are installed correctly?

Can you hear any 'tingle' metal sound out the exhaust indicating a loose gate valve?

Or something else is amiss, they aren't 'modded' turbos by chance?

Still doesnt detract from the fact you will get gains at the end of the day... from (wait for it) cam gears!

If you wanna attack, thats fine. But when you post threads with half the story - expect half the help. Simple as that.

Hopefully Guilt can post up with some more in-depth information for people to help diagnose whats wrong.

[The Dan]

I would agree with actuators being the issue. No boost until 5500rpm then it comes up to 6psi. Sounds like the gate is slightly open. You don't always hear the rattle either.

Even if they are adjusted correctly and the actuators are stuffed, they may be cracking open at 1psi and bleeding everything off until you create the required gas flow.

You need to put a mighty-vac on the vac line and pump pressure into the actuator. You will be able to see the arm move when you have created the opening pressure. If they move at 1 or 2 psi, then bin them. If they move at 10psi, adjust the arm.

[black sky]

So does any one know how i can check it without taking half the engine bay out to see if it's leeking the vac thing sounds good but does any one know of some one that does it????

Cheers

anthony

[The Dan]

does any one know of some one that does it????

Me

[black sky]

well that was easy how much and where abouts are you mate

Cheers

anthony

Me

[Guilt-Toy]

the car is laggier then a CB70 with a GT3582r on it and it still pulls like a train (after 6000 rpm) (CB70 is the charade 3 cyl 1 litre twin cam engine)

Its got to be the actuators!

Also the boost sol is on the intake side and its using a spaghetti style hose system to go around the back of the engine to the front of the car.

I suggested these 2 things.

1: buy some HKS actuators and install them

2: move the sol to the turbo side of the engine

This should fix the car up, i estimate its only got 240 - 260kw atm.

I think trying to diagnose the problem may be a waste of time, you need to get those actuators replaced asap ! once this happens your turbos will have no choice but to make boost.

You can try and get 2 springs, wire them on the wastegate holding them shut firmer... if the car makes more boost (becuase the spring is holding more load on the wastegate) then you know your actuators are shot.

just a tip

[daisu]

go the cb70.... little off topic there....

but I would also say it sounds like actuator, given the symptoms

[snappy_]

I'd say actuator also, cause my gtst was doing the same thing too when i had a boost controller in, now its changed, it's working like how its suppose to work.

[Guilt-Toy]

go the cb70.... little off topic there....

but I would also say it sounds like actuator, given the symptoms

hehehee i once put 22deg timing on 22psi in one of those motors, damn it went hard!

I'd say actuator also, cause my gtst was doing the same thing too when i had a boost controller in, now its changed, it's working like how its suppose to work.

Yup. i told him what he needs to do. Hopefully he sorts it out soon..

once you fix it you will love the power, will feel like a different car!

[black sky]

the car is laggier then a CB70 with a GT3582r on it and it still pulls like a train (after 6000 rpm) (CB70 is the charade 3 cyl 1 litre twin cam engine)

Its got to be the actuators!

Also the boost sol is on the intake side and its using a spaghetti style hose system to go around the back of the engine to the front of the car.

I suggested these 2 things.

1: buy some HKS actuators and install them

2: move the sol to the turbo side of the engine

This should fix the car up, i estimate its only got 240 - 260kw atm.

I think trying to diagnose the problem may be a waste of time, you need to get those actuators replaced asap ! once this happens your turbos will have no choice but to make boost.

You can try and get 2 springs, wire them on the wastegate holding them shut firmer... if the car makes more boost (becuase the spring is holding more load on the wastegate) then you know your actuators are shot.

just a tip

Ok i just blocked off the air filters and presurised the lines by running air through them.

the front turbo's wastegate starts tp open at 3psi and the back turbo is starting to open at 7 psi

i'm guessing this is not normal, when are they supposed to start opening

so do i change both actuators??

Cheers

anthony

Edited October 11, 2008 by black sky