R32gts-t Turbo Bottle Knecking

[GTAAAH]

Hey guys, my turbo kicks in around 3000rpm and u can feel the power increasing rapidly to 4000 rpm, but it seems to just bottle kneck or max out or hit a wall all the way from 4000 through to 6000 rpm at which stage the turbo kicks back in (and i gotta shift). I cant afford a dyno at the moment as im still paying the car off ( and the $1800 insurance -_-) so any suggestions would be much appreciated

[black_32]

try changin the plugs

[GTAAAH]

yeh just did em. the old ones were pretty good anyway. Any other suggestions guys?

[paulr33]

free up the exhaust

[GTAAAH]

its got a 3 inch turbo back exhaust system on it tho, any thing else, ne 1?

Edited April 3, 2006 by r32 gts-turbo

[Nabil]

Check all spark plug gapping is spot on and see if all coil packs are sending a current to the sparks.

[R31 POWER]

The turbo is falling off boost as the stock ones are shit,get a rb25det one since your on the cheap.Do a search

[WazR32GTSt]

yeah i think its just the nature of the stock turbo...

awesome down low, not-so-awesome up top

[GTAAAH]

Spark plug gaps are all good and spark getting through is sweet.

Ah 3000 rpm isnt down low to me, drives me nuts having to drop the clutch at 4000rpm to take off fast -_-

I thought maybe its just the turbo maxing out after 4000rpm, but then i thought it was unusual that it seems to kick back in again at 6000 rpm

Oh well thanks for your help. Cant put a new turbo onto it due to power restrictions damit.

[GTAAAH]

um it couldnt be like the wastegate or something could it?

What about the Computer that organises fuel distribution and such? Any way that could be misfunctioning or set up wrong? Its a pretty standard looking unit, sitting on the top of the engine where u take off the spark plug cover, right?

thanks

[TTT]

a stock rb20 turbo doesn't fall off boost at 4000rpm then come back after 6000rpm.

what does the boost gauge show between 4000rpm and 6000rpm where you say is flat?

does it drop in boost?

what is your boost set at?

other than exhaust, what mods do you have?

[GTAAAH]

well i fancied i did see a drop in boost at these rpm's but i think mainly it just stays at the same spot (about 5 out of 7).

Only work that has been done is the exhaust and new suspension.

I dont know what my boost is set at as i dont have a boost gauge and have very little knowledge on cars made after 1985 so that i am unable to put one in.

[ellie]

Me thinks you running standard CPU

Me thinks you gots a classic case of retard and enrich me does

To much boost perhaps

Anything ringing a bell

[ODessA]

how much boost ?

[Cubes]

Me thinks you running standard CPU

Me thinks you gots a classic case of retard and enrich me does

To much boost perhaps

Anything ringing a bell

The std ecu does not have an issue with R&R.

They simply fuel cut.

Ppls have dropped hks2530's on them with an FCD and made 200rwkw on the stock ecu.

R33 ecu... yes major r&r.

Dyno power runs are not expensive. Anywhere from $35 to $80 depending on the shop.

Throw iton the dyno and see what the afr's, boost and power curve are doing.

No doubt it will shed some light on whats up with it, much cheaper than replacing a fuel pump that may not make a difference.

It could be a number of things... for example afm, knock sensors, fuel pump, cas... throw it on the dyno to weed a few of them out.

[TTT]

mate if you have a picture of your engine bay (looking from front of car towards firewall) I can circle where you need to attach a boost gauge as the factory gauge is connected there.

Have you tried simple things like cleaning your air filter?

[GTAAAH]

yeh we serviced it and such so all thats good, ran some injector cleaner through it to, um in a couple of house (5) ill be home and will take a pic of the engine bay and post it here.. although i wouldnt know what to do once its attached, e.g. what to crank it to and such.

ahm ill take it to a dyno i guess so they can adjust the boost and such for me, and get them to check out the cpu and all that, hope it doesnt cost to much, i still owe $10000 on the car zz