Jump to content
SAU Community

Recommended Posts

Yeah, more or less I don't want to risk the motor just yet. It's my daily car to get to work and I kinda need it :P more or less I told him to play it extra safe up top, so he took as much timing out as he could without letting exhaust gas get too hot, and then added fuel as you can see by the 11.5:1 AFR. He was trying to get top end power as low as he could, while still getting the response in the mid range.

Looks like your tuner's trying to stop it from going over 300rwkws. Never less good result

More like the boost drops off.

It's boost control, not tuner IMO.

17psi --> 15psi :P

Nah it's both Nismoid. I was running NO boost controller, so that boost curve is entirely the actuator. If we had boost control set up, we would have it hold a flat 17psi....fact of the matter is, my tuner really didn't want to push it too far on an internally stock '93 RB25, so he did try to get the peak power as low as he could. Like I said above your post, he removed as much timing as he could before it started to have a negative effect on exhaust temps, and made it relatively rich on 11.5AFR.

He doesn't have as much confidence in stock internals as a lot of other people (inc myself) do, which is a good thing imo. He's making sure that it's not going to snap a rod bolt or something when I ring it's tits off lol

it would definitely have seen over 300 with timing and a tad less fuel up top. That's why I posted the AFR chart too.

Your AFR's looks abit too rich thou... The green afr looks more healthier. Once you bleed out some of that fuel it will give you lot better power curve all around. I mean unburnt fuel burns inside your exhaust which can also cause high exhaust gas temp, plus they can thin and carbonate (make it black) your engine oil.

I wouldn't worry about the engine at 15psi as long as its tuned detonation free. Factory pistons and con-rods have no issues handle 300rwkws detonation free.

I would get it retuned to about 12.3~12.5 consistent AFR with bit more timing. That saves you fuel, improves driving ability, won't carbon coat every thing and do the enviroment a favor :P .

Edited by kwickr33
Your AFR's looks abit too rich thou... The green afr looks more healthier. Once you bleed out some of that fuel it will give you lot better power curve all around. I mean unburnt fuel burns inside your exhaust which can also cause high exhaust gas temp, plus they can thin and carbonate (make it black) your engine oil.

Richer AFRs will drop the combustion temps though which is a good thing.

lol if the fuel and timing change, I'll do it myself. Since I don't know how, they're staying there :P I can't afford to pay for another tune lol.

I'll see how it goes after a couple of tanks....once I'm 100% there's no further issues with how the car's running, I'm going to be looking into E85 anyway. Then I'll be taking it up to Sydney for the tune I spose.

Your AFR's looks abit too rich thou... The green afr looks more healthier. Once you bleed out some of that fuel it will give you lot better power curve all around. I mean unburnt fuel burns inside your exhaust which can also cause high exhaust gas temp, plus they can thin and carbonate (make it black) your engine oil.

I wouldn't worry about the engine at 15psi as long as its tuned detonation free. Factory pistons and con-rods have no issues handle 300rwkws detonation free.

I would get it retuned to about 12.3~12.5 consistent AFR with bit more timing. That saves you fuel, improves driving ability, won't carbon coat every thing and do the enviroment a favor :P .

Detonation isn't the only thing that will kill a motor mate.

IMO his tuner has done a smart thing.

On a built motor, ye lean it up a bit once its all running nicely... However a stocker motor demands the respect of owners wishes

Good to see another way of doing it!

However, for the guys with larger turbos I am sure it would be beneficial to go straight to 3" as quickly as possible from the turbo. I know its the not exactly the same but its sort of like a bellmouth if it goes straight to the largest diameter. Thats my theory anyway.

Here is my intake pipe! I am very happy with how it turned out. It took a few cuts to get it right. It fits in perfectly. I forgot to get a photo with it installed. Tao gave me a spare bov hard return line which I cut and connected to the port welded on to the intake pipe in the photos. I have neglected the pcv connection as its not required functionally. I might go back later and do that as well.

Car is booked in for tomorrow to get the tune adjusted, cant wait!

post-29432-1287980179_thumb.jpg

post-29432-1287980185_thumb.jpg

I was pretty happy with it!

I was shocked that the 90 deg bend was the perfect fit. Even if you had some pipe that you could mould, the 90 deg bend is still exactly what you want. Cant wait to see the results tomorrow.

Trozzle, can you go for a drive in 4th gear and record rpm vs speed...

As in at 4000rpm you are doing 115km/hr?

Sorry I'd completely forgotten about this!

3000rpm looked to be about 88kph...so, 122kph = 4159rpm, which is where I achieved 17psi. I'm sure this response would be greatly improved if I were using an electronic boost controller of some sort. I believe the boost control in the ViPEC works in a way that as soon as it hits Xrpm (2000rpm in my settings) it begins pulsing the actuator with the intake pressure or something. If I set it to hold 17psi but not start pulsing until 4000rpm, this may improve my boost response and come on a bit earlier.

Run a $50 adjustable ebay exhaust cam gear. That will help with response.

I'm producing a small batch of 5 Ceramic ball bearing ATR43G3s in .70 and .82 turbine for trail at the same price as our regular ATR43G3s. In case they fail, you will be replaced with a standard sleeve bearing ATR43G3.

This will be the Duel ceramic ball bearing version of below:

http://www.digi-hardware.com/images/dynosh...g3p2290rwkw.jpg

Warranty period is for 12 month. Let me know if any one are interested to trail.

Run a $50 adjustable ebay exhaust cam gear. That will help with response.

I'm producing a small batch of 5 Ceramic ball bearing ATR43G3s in .70 and .82 turbine for trail at the same price as our regular ATR43G3s. In case they fail, you will be replaced with a standard sleeve bearing ATR43G3.

This will be the Duel ceramic ball bearing version of below:

http://www.digi-hardware.com/images/dynosh...g3p2290rwkw.jpg

Warranty period is for 12 month. Let me know if any one are interested to trail.

ahhhhhhhhhhhhhh NOOOOOO, just as I'm swapping over to a RB25 you do this!

Pitty I'm running out of money, I'll just have to stick with my ATR43G3 0.63 rear :)

Run a $50 adjustable ebay exhaust cam gear. That will help with response.

I'm producing a small batch of 5 Ceramic ball bearing ATR43G3s in .70 and .82 turbine for trail at the same price as our regular ATR43G3s. In case they fail, you will be replaced with a standard sleeve bearing ATR43G3.

This will be the Duel ceramic ball bearing version of below:

http://www.digi-hardware.com/images/dynosh...g3p2290rwkw.jpg

Warranty period is for 12 month. Let me know if any one are interested to trail.

You can stick this in my turbo if you want :)

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

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...