R33 GTS-t not going as well as it shoud.

[Phantom3D]

HiI just got myself a GTS-T from Japan, but I am having trouble with it. It seems t have like 180 - 190 bhp, and not the 250 it should have. (My 150bhp Mitsubishi Colt CZT is faster!!)

The turbo seems to work as it should, doing 0.5 bar untill about 5k revs, then up to 0.7bar. Very stable. The dump also sounds nice. When giving full power i can feel a slight (dont know the word for this) bump, like it wants to do alot more, but something brakes it down. All hoses are as they should. The turbine is tight and good. Need help! :-(

[TonyStarks29]

post some pics man...

[Phantom3D]

Really need help with this problem!

[Leegamer]

Go have the car Dyno'd.

[phatjo911]

How do you know your car has 180-190 bhp?

Did you dyno it?

[Phantom3D]

Dynoing here is very expensive, so I was hoping to skip that, and what good would it do? I know it is slow.

I have driven alot of similar cars r34, m5, supra, rx-7's and skylines. We also tested it against a 200bhp Volvo, a bmw 325 (192bhp) and my colt CZT (150bhp) They all were just as fast as my skyline. And I can feel there is something wrong when the pressure builds up. I am thinking maybe the sparkplugs? Or somesort of sensor.. Anyone had something similar?

[Leegamer]

Dynoing here is very expensive, so I was hoping to skip that, and what good would it do? I know it is slow.

I have driven alot of similar cars r34, m5, supra, rx-7's and skylines. We also tested it against a 200bhp Volvo, a bmw 325 (192bhp) and my colt CZT (150bhp) They all were just as fast as my skyline. And I can feel there is something wrong when the pressure builds up. I am thinking maybe the sparkplugs? Or somesort of sensor.. Anyone had something similar?

Most Dyno shops charge like 50 bucks for 2-3 runs.

[Phantom3D]

About 200 bucks per hour here.. and it is not easy transporting, because we can not registrate the cars (japan spec) leagely here... hard to explain but I was hoping to avoid a dynorun.

[Leegamer]

About 200 bucks per hour here.. and it is not easy transporting, because we can not registrate the cars (japan spec) leagely here... hard to explain but I was hoping to avoid a dynorun.

Then good luck finding out if you have the proper amount of power.

[SamuraiSam]

Sounds like something is putting your car into safe mode. Check all codes in the ECU.

[graphicdude]

well unless you can hook up a data reader to it or throw it on the rollers for an hour, I say you're pretty much f*&ked in finding answers to your problems.

[Phantom3D]

Well, I said I was trying to avoid that. And I KNOW it does not have the right amount of power (I might get this proven with the g-tek within a few days). I guess I can try hooking it up to look for any faultcodes. The reason I asked, was to get the answer if anyone have had similar problems or know if any sensors or sparkplugs can cause the problems. Not to get told that i am f'cked if I wont spend hundreds on a dynorun when I know the car is underpowered!

It feels non turbo, and it should not be like that boosting 0.7BAR at peak.

Thanks for the tip SamuraiSam!

[zamm3k]

could be tuning! boost leak?

[Phantom3D]

That was what I thought at first too, but should the boostmeter then show the right amount of boost? Also, all hoses seem tight, and no sound of escaping air. What I might think is that when the pressure builds up, the sparkplugs can not keep the spark because of pressure.. I have ordered new plugs (The old ones was rubbish) hoping it might be that. Also just got it confirmed by another R33 GTS-T owner. It does not go as it should, he also said it feels non turbo

[gismonismo]

I herd theres poeple that turbo charge the rb25N/a from I dont remember the name but its like a minivan looking that come stock with if not the rb20 or rb25 N/A but it in a gts-t and turbo charge it.just to sell the car.you should check into that.check for what engine came in your car and see if its the same.theres the series num located in the block on the turbo side.

[Gold Digger]

That was what I thought at first too, but should the boostmeter then show the right amount of boost? Also, all hoses seem tight, and no sound of escaping air. What I might think is that when the pressure builds up, the sparkplugs can not keep the spark because of pressure.. I have ordered new plugs (The old ones was rubbish) hoping it might be that. Also just got it confirmed by another R33 GTS-T owner. It does not go as it should, he also said it feels non turbo

Gonna depend on where you boost leak is. On most engines, the boost gauge reads boost pressure from right near the turbo outlet to the intercooler. It's possible to still read normal boost if the leak is say, on the outlet side of the intercooler or closer to the throttle body. Where is your boost gauge connected?

[gismonismo]

I dont think its a boost leak.when boost leak the car will stop running after full throttle like if it wants to shut down(like if its out of time)is it a rb25det or a rb20?

[skydragoness]

is it a rb25det or a rb20?

RB20? Did you really ask that?

[jason.sanders4]

well it seems like a boost leak to me, i don't know much about nissan's but my old subaru had the same problem and it wouldn't show up on the gauge for the fact that it is electronically controlled. or you could also have a small vac leak as well.

[Phantom3D]

Thanks for anwsers! It is a Rb25. I will check serial numbers when I can. The Boost gauge is mounted on ehh, don't know the word for this. In norwegian it is "innsuget"

You can see the blue cable on this picture;

Changed plugs yesterday, old ones were rubbish, but no quicker with the new ones..

[bnr32gtr]

those are R34 head lights correct ,get a front pic of that
Modified by bnr32gtr at 4:15 AM 9/21/2008

[jason.sanders4]

where did you get those fenders I like those!

[gismonismo]

http://www.teamignite.net/foru...&t=50

[jason.sanders4]

where did you get those fenders?

[Blue Batmobile]

Nice looking ride. Good luck with it .

Bat

[gismonismo]

boost leak laurel was right.

[EL MAMITO USMC]

good hope you fix it. any updates on the car

[Biggamehit]

very clean car

these setup have progressive boost.

only after about 4500rpms does it go up to the full 7psi ( if you dont have a controller). when i first drove mine, i didnt know this.. im like... whats this second feeling lol.

you can eliminate that by pulling the plug on it.. however you will need an SAFC or somethign to control the fuel becuase you will have a flat spot. Ill post the link to all that jazz later it will make sense.

http://nissanskyline.6te.net/GTS25T_spec.htm

check your solenoids. get your hands on a R33 Rb25det manual it will have all of the electrical specs.
Modified by Biggamehit at 8:11 PM 10/6/2008

[Phantom3D]

Thanks for answers. Have not fixed the problem yet. But I think it is a bad airflow sensor. Any idea where to order cheap to Europe?

A friend has a black one with same faults.. We have no other clue. To bad skylines is not as common here.