Jump to content
SAU Community

Recommended Posts

50 minutes ago, Nosure said:

Hi. Will fit on a fully build rb28 with cnc head 280 cams etc. 

turbo is here today. New exhaust setup should be done in 3 weeks time. 

 

:worship:


I like it.  Very cool, look forward to seeing how this comes together - sending it on E85?  Please post results when it's done :)

1 hour ago, Lithium said:

:worship:


I like it.  Very cool, look forward to seeing how this comes together - sending it on E85?  Please post results when it's done :)

Yes mate. E85 full time.  The 1.45 housing look huge.  Hope I choose the right housing:)

2 minutes ago, Nosure said:

Yes mate. E85 full time.  The 1.45 housing look huge.  Hope I choose the right housing:)

That that size cams, engine and compressor you obviously want to party - so that turbine housing will be well justified I suspect :) What kind of power and power delivery were you looking for?

Fwiw I've been in a GTR running an RB28 with a 1.45 EFR8374 and it was surprisingly punchy, the 280deg cams will probably soften it up a bit down low but I suspect it'll still have a hearty power delivery - so long as the black series 68mm compressor doesn't come at too much cost in spool.  I suspect it should prove to be a pretty rewarding power delivery

1 hour ago, Lithium said:

That that size cams, engine and compressor you obviously want to party - so that turbine housing will be well justified I suspect :) What kind of power and power delivery were you looking for?

Fwiw I've been in a GTR running an RB28 with a 1.45 EFR8374 and it was surprisingly punchy, the 280deg cams will probably soften it up a bit down low but I suspect it'll still have a hearty power delivery - so long as the black series 68mm compressor doesn't come at too much cost in spool.  I suspect it should prove to be a pretty rewarding power delivery

What I see is the compressor flow increase 20% might need bigger rear housing to max out the turbo.  1.05 is small even for 8374 in my eye. 

14 hours ago, Nosure said:

What I see is the compressor flow increase 20% might need bigger rear housing to max out the turbo.  1.05 is small even for 8374 in my eye. 

Agreed, the 1.05 can work ok on EFR8374s depending on the setup but I wouldn't use it on an EFR8474 on a 2.8 with a good head.  It sounds like a good combo from all I can tell.  Looking forward to seeing how it comes out :)

Edited by Lithium
On 26/06/2019 at 5:59 PM, Deano 1 said:

Closed/ Secret FB group, I assume it's a GTR for sale. And I didn't think cross posting to for sale ads was allowed?

That isnt a terribly hard question to answer if you know what is max engine RPM?  a 2.8L engine revving to 8500rpm @40psi boost, will produce 1000+hp at the limit of the compressor map.  Speed sensor mandatory. 

The 80mm turbine in 1.45 a/r will see 11-13psi backpressure so its really a question of why do you need 1000hp and is this really the right way to get there? 

10 hours ago, Deano 1 said:

will the 9280 make 1000hp atw on a 2.8 with everything needed to make 1000hp...... that is the question.

Depends on how harsh the dyno is etc, the compressor flow is there for well >1000hp @ crank on E85 but the question with the EFR range has often been if the exhaust side is up to it given people already run into EMAP issues with the EFR9180.. granted it's hard to know how much that's just due to people running out of compressor on them

  • Haha 1

People really like round numbers don't they.. My car did 495kw at absolute max turbo speed and everyone always asks why I didn't go one psi more to break the half ton.

 

If you need a round number in your life set the Dyno to metric and aim for 700kw instead of 1000hp.

 

People forget that tuners pull a degree or two of global out when they unstrap the car anyway. 

 

 

Edited by burn4005
  • Like 1
  • Thanks 1
12 minutes ago, burn4005 said:

People really like round numbers don't they.. My car did 495kw at absolute max turbo speed and everyone always asks why I didn't go one psi more to break the half ton.

I might be in the right mood for this, but I love so much about this comment. 

1000hp is such a random made up number, like I understand the bragging rights but seriously.  If you get an EFR9280 on a strong RB28, and tune it until you hit around 117,000rpm shaft speed then who gives a crap what the dyno says - that is going to be a FAST car.   Pick a bunch of parts which work well together and build, tune until it's sent and go forth and enjoy... that is the way to get a happiest result.  The reality is those other numbers become academic in the end and sometimes result in people making compromises trying to hit a target which is academic and realistically you will make different power on different days or different situations depending on what various aspects of the tune kick in and compensate for whatever may be going on at the time, as you get ESPECIALLY on big high strain setups.

A specific power number which can mean different things on different dynos and even days, or setups is not worth making compromises on imho.

  • Like 1

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

    • Sounds like you've got an interesting adventure ahead here with local support if you have trouble! My guess is that, unboosted, you will be OK with a small upgrade like -9. What will happen is that once the stock ECU sees more airflow than it expects it will add a heap of fuel and pull a heap of timing to be safe because it can't understand how it could get that much air without there being an issue. You will see clouds of black smoke and it won't pull hard through the midrange and top end. So, overall it will be a bit frustrating but should be OK. If you are still nervous set the base timing back 2o through the CAS, but it will be even more sluggish everywhere. As said above through...this is not my guarantee your engine won't be blown into a million pieces, leaving you looking for very hard to find parts A better idea is get a computer with logging ASAP, wire in a wide band O2 sensor and a use remote tuner. I've done multiple cars this way and while it is not as good as a specific tune on a dyno they can get it 90% right. I'd suggest if you can afford an R33 GTR these days you can afford an ECU and tune. And if you can't afford that you sure won't be able to afford the rebuild if it goes bad in the meantime,.  
    • Yeah it would be nice if someone took the time to put that sort of information together, but there are a lot of variations in looms. I think you are making this way hard for yourself if you just want to get it running....sourcing an SR20 with the right wiring will be a billion times easier than matching the RB loom to an S15 chassis. If you do end up going this way, you just need to trace every wire in the loom with a multimeter, 95% of them will go to a location you can confirm at the ECU.....and then post it up for the next person who needs it  
    • Just top it up with water, and keep a general idea of how much you added. It is normal for water to be pushed into and pulled out of the reservoir through the cap, and it should not be more than half full or it will be likely to overflow when hot. Any decent mechanic can do a pressure test of the cooling system to confirm if you have a leak. Keep in mind if it is only leaking a little and when hot it may well evaporate before you see it hit the ground
    • I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
    • Is it alright to top up with just another green coolant?
×
×
  • Create New...