Jump to content
SAU Community

Recommended Posts

when will i have to do head bolts and head gasket? at what power or psi can a stock rb25 handle safely ?

Not really a real answer to that one. Its all in the tune. Some people break cars with >300 some people have cars for years with <300.

Mine has been in the 280-300 (dyno dependant) mark for a couple of years now, and gets the living balls thrashed off it on the track. And im not totally gentle on the street when im feeling frisky.

  • 1 month later...
  • Replies 75
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

My build has slightly changed

This what I'm buying for my car

Gtx3076 .83 with 40mm external gate

Hybrid low mount manifold (keep it looking stockish)

Z32 air flow meter

Walbro 400 just in case I go e85

Bosch 1000cc injectors high Inpednce (unsure if they will fit with standard fuel rail) and do the injectors have to be flow rated for each cylinder ?

Unsure if I need ignition coils and fuel reg ?

The car has done 135xxx ks

Any options please tell

Thanks

You are right to be scared, the factory head bolts are good but they won't hold the head down forever. Personally I would go with the GT3076 unless you plan to change the headgasket and bolts down the track and lean on it some more.

Mine has held 23-24psi for a while now ... GTX will be the wrong choice for your power goals as they seen to act more like a 35r than a 3076... You have so many choices of turbo for your power goals...

So a gtx3076 dose not spool as quick as a gt3076r ? It's response is more like a 35r ? Eg more laggy ? So a better choice will be a gt3076r or a gtx3071 ?

How about Bosch 1000cc injectors

Do they bolt straight in to the standard fuel rail ?

Nope, the GTX3076 was meant to be a quicker spooling turbo etc etc but it has been tried and tested and is not proving to be that way, it makes good power IF you push big boost.

The GTX3071 has had awesome results if you look up Mick_o then you will see what i mean, perfect example of a well built streeter!

You also have too take the time to check out the HG and Kando threads as well as the RB25 dyno results thread too see that Garrett is only one of the option for you.

I love my 3076 and will be staying with that size even with the upgrades.

I dont have a standard fuel rail so i cant answer that BUT i am pretty sure they do with the addition of a spacer, there is a thread on SAU about it somewhere.... I have 2000's now and they were a b**ch to fit!

My GTX3076 is nowhere near as laggy as a 35r, but the I upgraded from GTX3071 was much nicer to drive daily. It just depends what you want from your car and the sacrifices you are willing to make.

The 1000's are longer than the 2000's and should drop in, but nothing is ever easy when it comes to performance mods...

I'm guessing the GTX3076 is good for around 400kw pushed hard on e85, and the GTX3071 around 350kw, or 300 on 98.

Putting the power down is the least of your problems at 300+, there are many parts you will need to replace to reliably handle that sort of power, starting with the clutch.

I can get a brand new gtx3076 or a gtx3071 for under 1300 with out a rear housing.

I've got two garret rear housing to chose from .63 and a .82

My other option is I could just buy a core because I also have a spare front comp cover !

The turbo was a gt3040 or gt3082 but the core shit it self !

what computer are you running? if your still to get one then why not get a Hypergear turbo and adaptronic in a package...

The graph of the last Hypergear turbo looks like they would be awesome all round.

what computer are you running? if your still to get one then why not get a Hypergear turbo and adaptronic in a package...

The graph of the last Hypergear turbo looks like they would be awesome all round.

+1 For the ecu and turbo package if not yet got a ecu

my gt3076r is on it way :)
im now looking for external gate ! im also thinking of buying a hybrid performance manifold.

ill be more than happy to make 270 280 rwkw so i was thinking a 38mm waste gate

any advice would be great
thanks

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...