Atr43G3 Low Power

[hypergear]

Actually Stao, you are probably most qualified to comment on this but what do you make of my & SimonR32's power delivery?

It seems that both of us made pretty good power through the midrange but didn't make much more at all from then onwards. Most dyno graphs I have seen that are using your turbos seem to make good power right the way through to redline (ecept in cases where boost control is an issue).

I will post up my graph tonight but it is quite similar to the one SimonR32 posted.

Simon's made 261rwkws on a stock Rb20det. That is equivalent to 300rwkws+ on an Rb25det. Excellent result.

Check all results from ATR43G3s in my thread, Your result with Rb25det is poor and 50kws below average. I don't know whats wrong with the whole package rather then the turbocharger alone. At this stage since its made more power from the car that it came out of, then, I don't think its a turbo issue.

[Forgot]

Simon's made 261rwkws on a stock Rb20det. That is equivalent to 300rwkws on an Rb25det. Excellent result.

Check all results from ATR43G3s in my thread, Your result with Rb25det is poor and 50kws below average. I don't know whats wrong with the whole package rather then the turbocharger alone. At this stage since its made more power from the car that it came out of, then, I don't think its a turbo issue.

I definately agree, I don't think its the turbo either.

I might get a test pipe made up to replace the cat just in case that is the issue & I will test the intercooler as well to see if there are any restrictions.

[SimonR32]

Simon's made 261rwkws on a stock Rb20det. That is equivalent to 300rwkws+ on an Rb25det. Excellent result.

Check all results from ATR43G3s in my thread, Your result with Rb25det is poor and 50kws below average. I don't know whats wrong with the whole package rather then the turbocharger alone. At this stage since its made more power from the car that it came out of, then, I don't think its a turbo issue.

Here is the graph with the BP98 tune vs the E43

Edited September 22, 2011 by SimonR32

[Harey]

For example, you believe your fuel economy is good. If I were getting 400kms to a tank, I'd be annoyed. I get 600kms to a tank. Difference in tune.

WTF 600km to a tank?!?

The tanks are supposedly 65L but I have heard of people literally running out of fuel and getting stranded then only getting 59L in.

So you are getting less than 10L/100km and thats if you run the tank completely dry.

Does anyone else get this? Maybe I drive too hard lol Trent said he spent a lot of time making it efficient on fuel.

Do you do mostly freeway driving?

[zebra]

600k's to a tank in a R33 gtst is easy, I was getting it after tuning the car myself.

Its all about the road tune.

[Room42]

600k's to a tank in a R33 gtst is easy, I was getting it after tuning the car myself.

Its all about the road tune.

+1

[Harey]

Mostly on the highway? Surely not much giving it a hard time.

For 50L of fuel thats 8.3L/100km thats like excel lancer territory lol

[paulr33]

yeah if i do hwy i can get that

when i did VIC to NSW i got 560kms (from RSM) and the tank wasnt empty and fuel light wasnt on yet

and that was constant 110km/h up the highway

but i would not get that in city driving

[zebra]

yeah on the highway, Goulburn to Canberra Daily

[rondofj]

I get 16-17L/ 100kms city driving occassionally hitting the limiter but not much, my fuel economys truly fked...

[SargeRX8]

I really have no idea how you get this economy. Mind you all my driving is traffic and around my area (parramatta, merrylands etc). 600km...., my mate gets that from his 11 golf gti and vw brag about the 600km fuel economy, and you guys are telling me a skyline can do it??? f**k me lol I want in! oh and with my fuel light on I only get 53L into the tank. Could have sworn r33 are a 55L tank..

[Hanaldo]

600k's to a tank in a R33 gtst is easy, I was getting it after tuning the car myself.

Its all about the road tune.

100% this.

I don't do any freeway driving, I actually get worse economy on the freeway sitting at 100/110 (haven't sorted out that part of my tune yet). But my daily trek to uni is mostly 70/90km/h cruising. I don't get muuuuch difference between highway cruising and stop start traffic conditions though, maybe about 580-590 for driving around town. I'll hit full boost a couple times a day, other than that I drive it like I would any other car. The trick is to set your tune up to the way you drive and the roads you drive, it's very difficult for a tuner to do that for you, especially on a dyno.

My petrol tank is 55L, I have come very close to running it dry lol. I usually fill up as soon as the light comes on, usually takes about 50L to fill up.

[SargeRX8]

I actually made a big mistake in my input here.

Ive got the SS2. This is how my situation stood and you tell ME what you think.

Initially the car was tuned at Advan Performance. On 11 PSI I made 244rwkw. Very nice figure. One would only imagine more boost would mean more power, right?

Took the car to DVS JEZ exactly how it came out of Advan(Note my tune at Advan was on a failing fuel pump, this was rectified). We fitted a new actuator running 13.5PSI low boost and 19PSI high boost. I read my dyno wrong, had shit confused in my brain.

According to my dyno chart, I made 217RWKW on low boost(13.5psi) and 244rwkw on high boost(19psi).

Anyone able to tell me how or why the hell I made such little power on the dyno with MORE boost? Yet the car feels much stronger on low boost 13.5 @ 217rwkw than it did on 11PSI @ 244rwkw. One thing to note was that when the car was tuned on 11PSI there was some big timing, almost 20 degrees in some of the big areas. Jez said this is more than likely due to the car being able to provide this much timing because it was on such low boost. We could have ran the car on more timing for low boost but we tuned the car for 19psi, not 13psi and that could be an affecting factor. None the less, I was not getting the 300+rwkw I should be getting. I will be building my new full 3" intake pipe soon and seeing if this will have an effect on the car and its output. Maybe a little dyno unhappy but if there is 60rwkw to be gained, I WANT IT! We were also not getting very good traction on the dyno with two people in the car and 50kg of lead in the boot.

[DVS JEZ]

In reality there is a difference though. There's a lot of variables that can affect the tune, and what one tuner considers safe and good may just be a poor tune to someone else. I picked up 60rwhp and about 600rpm of response just by changing tuner. Even if I ignore the number because I changed dyno as well.

For example, you believe your fuel economy is good. If I were getting 400kms to a tank, I'd be annoyed. I get 600kms to a tank. Difference in tune.

Sarge' car mainly got a powertune due to cost of dyno time and his last experience(cost) with his last tuner.i have helped him out with cost at a loss to me and we still have to do a road tune to get better fuel economy.

[Get EPIC]

what dump pipe are you running? Hopefully not stock! If its not that i would reckon its your cat.

[Room42]

I really have no idea how you get this economy. Mind you all my driving is traffic and around my area (parramatta, merrylands etc). 600km...., my mate gets that from his 11 golf gti and vw brag about the 600km fuel economy, and you guys are telling me a skyline can do it??? f**k me lol I want in! oh and with my fuel light on I only get 53L into the tank. Could have sworn r33 are a 55L tank..

I have set up my grandma driving to around15.5:1 up to 16.5:1 afr. Even when accelerating more than grandma would the afr is still around 15:1. Cruising is 16:1 give or take. 100kph cruise is stoich or 14.7:1 give or take 0.1. BUT!!! lol No but seriously now, when I give it a bootfull all that lean efficient grandma like tree hugging hippy driving afr goes out the window. At a quater throttle its around 13:1 till about 4 grand then down to 12:1 up from there. Same at half throttle. Three quater throttle sees about 12.5:1 till 4k then 12:1 after and full throttle is about the same except when it hits full boost at about 2200 to 2500 gear dependant it goes straight to 12:1. Cos the fuel tune isn't absolutely perfect it does dip to 11.6:1 when the vct changes at wot but then goes back to 12:1. To summarize under 4k rpm and low load is lean as f**k!!! And after 4k rpm and high load is 12:1. But all that bullshit aside keep it real lean and drive like you are on the dole to get good economy. Its just advice. It works for me.

[Forgot]

Here's my dyno graph for those interested.

Edited September 23, 2011 by Forgot

[Forgot]

One thing I did find last night was that the 2-2.5" silicone elbow I used to join the compressor outlet to the cooler pipe has a slight kink in it, like it has been bent slightly past 90 degrees. Now its not a big kink BUT at higher boost levels, could this cause enough restriction to effect spool of the turbo & hence effect the top end?

[SimonR32]

Here's my dyno graph for those interested.

I would be saying that the turbo is possibly the issue... If you look at mine and your results the "curve" looks almost identical (ramps hard and then hits a wall)

[Forgot]

I would be saying that the turbo is possibly the issue... If you look at mine and your results the "curve" looks almost identical (ramps hard and then hits a wall)

Jesus, they're almost identical!!

Hanaldo, I don't suppose you have a dyno graph from your tune at allstar do you? Might be pretty interesting to compare.

I just can't help but think that I'm missing something, even if you disregard the actual power figures there is a BIG difference in the shape of the graphs between SimonR32 & my graphs & almost every other graph I have seen for these turbos.