Jump to content
SAU Community

Recommended Posts

1992 R32 GTS-T Type M - Manual

-Bosch 040 with relay

-300x600 front mount

-Pod filter with cold air box

-Superspark coil packs

-3 inch dump back exhaust

-Turbotech boost controller

143.5 rwkW @ ~11psi (Several months ago)

Recently embarked on a further set of upgrades

-Bosch Z32 AFM

-Denso 550cc injectors (bought second hand, cleaned and tested by KPM)

-Nistune computer

-Garrett GT2871R in RB25 housings

-3 inch Advance dump pipe

-Gutted cat

-New spark plugs (NGK platinum 7s)

Tuned on Thursday - 170 rwkW @ 16psi

Ran out of time at the dyno due to wasting most of the day with faulty computers and AFMs and I'm due back first thing on Tuesday (only got half an hour on the dyno by the time we got a working computer).

Very anxious as I was led to believe this setup should put out ~200 rwkW at ~16 psi and would be capable of 220kW plus at safe boost levels.

Dyno technician mentioned the carbon blowing out of the exhaust could indicate injectors not atomising correctly - how could this be? how much would this effect peak power?.

Current tune is quite laggy and rich, runs like a bitch when cold and stalls easily - still feels better than 143.5 and spins up much easier.

Is this purely a result of lack of dyno time and therefore rectified on Tuesday?

Any comments on this performance?

Cheers

Luke

Link to comment
https://www.sau.com.au/forums/topic/397278-r32-turbo-upgrade-not-performing/
Share on other sites

I'm waiting to borrow a mates compression tester at the moment.

What's bothering me is I was already making 145 with the stock turbo and could've made 170 on stock turbo, injectors and AFM if i was willing to run a bit more boost...

I had a shit copy which was giving funny voltage signals so borrowed the tuners car to go pick up a genuine one, intend to get my money back on the crap one.

The tuner intends to keep working on it but 170 kW at 16 pound isn't very comforting.

Not at all mate

Stock cars with just a nistune pull figures close to 200kw

Something must be causing a restriction somewhere.

Is the rest of the exhaust 3 inch?

Also is the power figure limited by knock, is this why he doesn't want to push it further or it just won't pull further?

Not at all mate

Stock cars with just a nistune pull figures close to 200kw

Something must be causing a restriction somewhere.

Is the rest of the exhaust 3 inch?

Also is the power figure limited by knock, is this why he doesn't want to push it further or it just won't pull further?

Kasko a rb20 wont make 200kw with just a nistune

Exhaust is 3 inch all the way, empty cat, muffler with twin tips,overall power figure was limited by time mainly, a mate who went to the same tuner had a similar setup wound out to 237 kW @ ~20 psi, just can't see why I should be making 170 kW @ 16 psi, is this just a lack of tuning or an inherent problem with my setup (i.e. will they be able to make up ~30 kW at the same boost just through tuning).

Edited by Luke HCR32

I had a shit copy which was giving funny voltage signals so borrowed the tuners car to go pick up a genuine one, intend to get my money back on the crap one.

The tuner intends to keep working on it but 170 kW at 16 pound isn't very comforting.

Are u 100% sure the afm was a fake? Does it have the nissan logo on it?

Yeah it was sold as a non genuine AFM which was apparently "as good as genuine" no stickers or anything, dodgy looking filament, mesh only on one end of the tube, tuner said they've dealt with them before and they're rubbish.

The one I have now is a Bosch and has the orange Z32 JECS sticker on it, not sure about a Nissan logo but has the same build quality as my stock R32 AFM.

Yeah just go through the usual shit.

Check the timing, ensure the belt isn't off a tooth or similar. Comp test and so on.

You've already said it stalls so likely VAC leaks somewhere as well which won't be helping matters.

Could be many things really, just have to work at it slowly. Hardly anything to worry about yet.

Find the issue and you'll be sorted. Wind in 20psi and you'll see 200-220rwkw. In fact if you did that now, and tuned it. You'd be around 200-210rwkw which realistically isn't "that" far off the mark. Hard call when you aren't using genuine housings.

Stop worrying and let the tuner finish his work.

I had a ~40 RWKW difference between a finished "Tune", and then a check/small touch up tune. Bare in mind, this was on an RB30DET but still goes to show what some extra time/work can do.

The problem with my original tune was:

a) not enough timing overall

b) not enough fuel coming on full boost to stop detonation when running extra timing

c) some rough patches in the tune which made the car a little less drive-able.

Funnily enough it made more power everywhere once the above was fixed up.

Those 2871R's arnt that brilliant, especially in rb25housings, well on the rb25 anyway

i had one and it was not easy to tune , i had the stock actuator on there and the tuner had problems getting it to hold boost at the top end, that was the 56trim version

i made 214kw on a rb25 with power fc and usual mods using an avcr to hold 18psi, 170psi in each cylinder compression

200kw must be an awesome result for a rb20 with this turbo.

To be honest your 143rwkw@11psi is on the low side. The stock turbo's don't do anything special power wise past 12psi anyway so i'd say you were already 20rwkw down. Cant say if it's the dyno or the car.

From what you've said the car is currently running like a bag of crap, which i'd expect with half an hour to play with. It shouldn't have much done beyond a bit of light load tuning and maybe a run up to check that it's safe. Plenty more in it.

Also, re the 200@16 comment. Unless someone has had it on an RB20 i'd be doubtful. On an sr20 yeah, on an rb25 yeah, maybe less boost, on an rb20 no, they just seem to need a bit more boost to make the same numbers.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Great work! Give it a clean up with some Emery paper, and I'd run a thread die over the threads too to clean them up. It will make reinstall much easier, and also life easier for the next time it needs to come out.
    • I'm not a fan of high humidity, it's one reason I don't mind being further inland out Ipswich, except the last 3 odd years, the drought broke, and it won't stop raining, which is making the humidity nearly unbearable when the rains are in during summer! For me, my body hates the cold, once the cold sets into my body, I'm totally screwed. I end up with severe muscle spasm in my back/shoulder muscles, and it feels like someone is trying to tear the muscles out. I have no issues with it getting stupid hot, so long as the humidity goes away. So the last 3 years as above, have been woeful! Ha ha. However, June 1st, and I'm only just converting from shorts and a tee, to long pants and a t shirt. And that's mainly as it's a bit wet and miserable and I wanted to work on a car.
    • I much prefer colder weather to hot weather, and especially prefer cold to hot and humid, Goulburn does gets pretty warm in the hotter months, but, I've found the humidity there is not as painful as even Sydney, the humidity up north is to oppressing for this old rooster  In saying this, it does get rather "nippy" in Goulburn for early morning, late in the evening walks, but nothing that a layer or two, some thermal gloves, and a beanie doesn't fix to make it an enjoyable experience, which is much more bearable to me than the oppression of heat and humidity,  especially at night when your trying to sleep If I recall correctly, a "wise man" once said that the "Southern Tablelands" was gods country, and I will not argue that point with him for the fear of a "permaban" LOL In car part related news: My intake is currently in Botany getting processed for the last leg of its shipping journey to my door   
    • Had a go at the stuck crush tube this afternoon. Tried things like grips and a chain wrench first but wouldn't just twist straight off. So got to work with a drill. Started small and kept a depth stop on to make sure I didn't drill into the bolt. Made a line of drill holes all the way up and enlarged them. Then a combination of chisel and Dremel to split it all the way up. Levered the split to get oil in there and eventually it gave a bit while levering. Worked it back and forth with loads more oil till it was spinning freely, then with grips I could work it downwards and off. And no significant damage to the bolt (not by me anyway - just the 27 years of rust)
    • Well, I'm tired. I'm tired because about 4PM yesterday, before today's appointment someone immediately bought my bumper. They couldn't get it any other day as they're on the way back to NSW. So I had to do that big GTR conversion I had been planning. Unfortunately, the information on SAU about what you need and how this is done is incomplete. So what should be a simple bolt on affair, yeah, it's not. Did you know if you use all GTR items the bonnet won't close? This little manuever sent me into about 1am the night before trying to dodge a way to get it closed. I will have to revisit this in the next few days  - or maybe not, I may let a body shop figure it out. It all needs to come up and my motivation to pull the bumper off is low. It also seems to hit things in the bay where the GTT bonnet didn't. Yes I used 100% new OEM GTR items. Today, I had the joy of driving to the dyno looking like this: Given I had roughed in the fuel and given sensible but pretty conservative timing, I didn't really bet on having the car drive out any real difference than when it drove in. Sadly due to a miscommunication and laptop fun and games (and almost bricking the dongle, prayers and firmware updates indeed), I ended up using HP Tuner credits to licence the car that was already licenced. So in the end my laptop was used. It turns out my butt dyno is still well calibrated after all this time. The 325kw was on 74% Ethanol, the 313kw line was on 98. The other line is the 'before' line which was 281kw. While the numbers are pretty low, they're pretty in line with what you'd expect. Even if US dynos bump the whole result up about 50KW, gaining 10-15% is similar gains.  The curve of the cam is pretty much spot on with what was discussed as well. All this said, it still feels bad to not see the number you secretly want to see. Even if the car drove great beforehand, and I knew pretty confidently the car would drive out much the same way it drove in due to the nature of a wellish dialled in LS1 not gaining much if anything at all from being tuned from where it was. As expected, the car isn't particularly sensitive to running it at anywhere between 12.0 and 13.0 - And the initial timing at 20deg and 12.0 made 308KW. So 3 degrees of timing, and leaning it out to 12.7 for 5kw, anything above stopped giving any benefit until E85 (which has an additional 2 deg as before). Car itself behaved entirely fine. I found out that 100C = 1.15V! IAT at about 7pm was 19C. I might mess with the bonnet mounting.. but given the REO NEEDS TO BE CHOPPED TO FIT A GTR BAR this is possibly something I may leave gathering (more) dust until it returns to paint jail.
×
×
  • Create New...