Jump to content
SAU Community

Recommended Posts

Hello.

I know it's somewhere in this forum, but i can't find it.

I've got the RB25DET engine and i have mounted an fmic and a bleed air valve.

I have finally learned to get of the line with 0.8bar (~12psi), and the shifting 1-2-D goes smooth.

But today when we were out to test i've got beeten by almost everyone with similar effect. I got 2-3 carlengths of the line, and a FWD with 300hp manage to get past me in 200meters. :)

So how can i get the engine to give more hp with a very limited amount of money? (I know i need a larger downpipe, but the rest.)

Is it possible to change the fuelmaps in the standard computerbox?

I've tried to talk to people here, but noone knows anything about the car here in Sweden, so all i can do is ask you on the other side of the world for help. :P

If you have an awd auto you will be losing about 70kw in driveline losses. You cannot easily tune your engine unless you have a series 2 stagea. For series 1 i would suggest a Greddy E-manage would be the best way to get some tunability. The next best alternative would be to get an Apexi SITC and SAFC (try ebay). BTW an electronic boost controller will build boost quicker than a bleed valve and hold it better.

The fmic will not be giving you any more power at this level. If you have not already get a highflow panel filter for your standard airbox. You need a 3in turbo back exhaust ( I have a split dump, some people prefer a bellmouth). Then if you have access to a four wheel drive dyno you could advance the base timing by means of the cas ( while using some reliable knock detection gear). This will give a little more zip and show up your air/fuel problems. You should get an SAFC at least or go straight for the Greddy E-Manage.

Good luck!

ps there is heaps of information here. Read the DIY section above - read all of the Jaycar thread one quiet night - even if you don't get the Jaycar gear you will learn a lot!

Gday

Its good to hear your not afraid to get out there and have a go! Remembering the old stag has 207kw and weighs 1700kg I wouldn't be to surprised that

a 300kw car that probably weighs half the amount got over you :P

The answer to your question is CASH and lots of it other wise you are just going to do damage to something ( probably not the answer you wanted to hear)

Good point! Its not too hard to get a 2wd manual skyline up to 200kw atw but to get my S1 Stagea over the 200AWKW mark (due for dyno in about 3 weeks hope to get 200 -220awkw) has cost me over $6000 not counting suspension and brakes. I hate to think what Tangles has spent to get over 240AWKW but I am guessing it would not be less than $10k!!

  Punk72 said:
Gday

Its good to hear your not afraid to get out there and have a go! Remembering the old stag has 207kw and weighs 1700kg I wouldn't be to surprised that

a 300kw car that probably weighs half the amount got over you :)

The answer to your question is CASH and lots of it other wise you are just going to do damage to something ( probably not the answer you wanted to hear)

Sorry, my bad. The car i was against got ~220kW/1300kg. I got 173/1600.

The things i have heard is that's possible to get ~200kW in the stag without big modifications.

All i want to know is how high i can get with standard specifications, and how i do it.

The goal is 372kW (500hp) so i will change almost everything, but not this year. :P

  KiwiRS4T said:
Good point! Its not too hard to get a 2wd manual skyline up to 200kw atw but to get my S1 Stagea over the 200AWKW mark (due for dyno in about 3 weeks hope to get 200 -220awkw) has cost me over $6000 not counting suspension and brakes. I hate to think what Tangles has spent to get over 240AWKW but I am guessing it would not be less than $10k!!

he said his car owes him 30-40k at this point

SAFC would be the easiest and cheapest way to get near your target. You won't be able to adjust the timing (as you would with full engine management computers like PowerFC's) but just leaning out the AFR's will help.

If you don't care about the auto box smoothness or longevity then a PowerFC or full engine management system will get you where you want to go.

So it's a power fc i need?

Which make and model do fit?

I've recognised that the R33 RB25DET got an other box. Is there any one that's "plug and play" or do i have to cut all wires and hope?

Is there any way to manipulate the stock box?

I know there's a really big jump at 200kw, where turbo, injectors and the ecu runs out and it will be a lot of money to get over that. :angry:

If you really want 373kw down the track you'll be converting to a manual gearbox which will open up the possibilities for an ecu. In the meantime i suggest you get a greddy e-manage or an safc and sitc which will do you til then and you can sell them when you want to upgrade.

  KiwiRS4T said:
If you really want 373kw down the track you'll be converting to a manual gearbox which will open up the possibilities for an ecu. In the meantime i suggest you get a greddy e-manage or an safc and sitc which will do you til then and you can sell them when you want to upgrade.

I want the auto transmission to be there when i'm finished. :angry: I know most of in will have to be changed, but i need a challange and a goal.

What parts of the gearbox is controlled by the ecu? And how can i get them controlled sepratly?

Do anyone got the pinout f枚r the stagea ecu? I have found the pinout for a R34, but is it the same? What i've read in here there's som changes in the pinout. :S

And i know there's a risk that the turbo will break, and that's a risk i will take. :)

It is possible to beef up the auto box to handle higher power.

BTW you haven't confirmed whether you have an S1 Stagea or S2 (neo engine, tiptronic). I am assuming you have an S1.

The computer that controls the auto is inside the main ecu. I have just been through this with my car. My engine management functions are now carried out by a chipped RB32 ecu but it has had to be piggybacked onto the stock ecu - a wiring nightmare which is beyond my abilities and i wouldn't recommend it. I would strongly recommend the Greddy E-manage or it may be possible to fit a complete S2 ecu and loom in which case it can be fitted with a Nistune chip.

Another member has kindly translated the S1 pinout from the Japanese manual and if you send me an email address I can send it to you as an attachment. bobvanruyssevelt@yahoo.com

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

    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 馃槀 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
  • Create New...