Jump to content
SAU Community

Recommended Posts

Hi guys new to this forum thing but need your help with choosing some new upgrades :D hoping you guys can point me in the right direction.

Ive recently completed an engine conversion on a 98 gu patrol went for something a little more exciting then the 2.8td that was in it instead with a rb25det that i had from a previously  crashed r33 of mine, the engine is unopened and has very basic mods so far but im keen to change that very shortly. 

Im looking for a turbo upgrade at the moment but ive got limited experience so not really 100% sure, but ive been contemplating the mambatek gtx3071r the company seem to have fairly good reviews for the small amount i can find, but im just not sure on the turbo choice and rear housing choice either .63 or .82 so any help would be appreciated.

Due to the fat arse patrol the poor little rb has to push around now im hoping for something not to laggy and capable of about 350rwhp 

 

Thanks in advance :1311_thumbsup_tone2:

For 350rwhp/260rwkw, my advice would be to get your stock turbo high flowed by hypergear. That turbo will do 260rwkw and full boost b4 3500rpm. Not too sure about the mambatek. Not many results around with those. I know they sound attractive but you will be a bit of a guinea pig.

Ok cool i did look at the highflow stuff a little but thought it might be worth getting something a little bigger so ive got some headroom for later chances are once i get 350 I'll want more:D dont really want to pay twice but i might have a chat to the hypergear guys aswell.

 

Dont mind being the guinea pig with the mambatek stuff its just hard to know what mods to do as the rb obviously delivers its power different in the patrol with all the wait and im also run a extremely heavy flywheel hoping to gain some low down torque but it messes with the top end a little

If i was buy a motor i probably would of went with that( and i just really wanted to start driving it, took a little longer than i wanted to do the conversion) as they make some good low down power but i had the rb25 already running read to drop in so thought id see how it went first before i went the rb30/25 way also ive never looked at whats involved but im guessing it might be more then i could do myself would definitely be good though.

I am still suprised at how well the near stock rb is going with the amount of weight its pushing around though

 

For your application might not necessarily have to build an Rb30det, we can high flow your factory turbo to meet your goal. and it will be very responsive for the power it makes. 

Ok i would definitely be interested in the highflow option if i can get around the 350rwhp out without squeezing  every drop out of the turbo.

I have to put a ecu in over the next few weeks hopefully and get a tune on the standard turbo i seem to have lost some top end rpm with the massive flywheel (im guessing) so that might make me go the highflow more than the gtx3071r if ive cut the top end out it probably wont be worth looking at the gtx 

2 hours ago, admS15 said:

 he has developed plenty of turbos for the rb for you to choose from.

this is why I rate hypergear, very happy with their hiflow i'm currently running. Plenty of good turbos around, but tailored specifically to rb's , well...worth supporting someone that puts so much R&D into a specific application.

  • Like 1
Ok i would definitely be interested in the highflow option if i can get around the 350rwhp out without squeezing  every drop out of the turbo.

I have to put a ecu in over the next few weeks hopefully and get a tune on the standard turbo i seem to have lost some top end rpm with the massive flywheel (im guessing) so that might make me go the highflow more than the gtx3071r if ive cut the top end out it probably wont be worth looking at the gtx 


A r33 high flow will get you there close to maxed out on 98, on e85 it will make 400+rwhp. A r34 high flow will get you a bit further. I'm not sure what effect being in a patrol will have with your heavy flywheel and whatever diff gears they have. Hopefully someone who has done a similar conversion can chime in on this.

Also the mambatek gtx turbos can't be compared to a genuine Garrett gtx turbo. I've seen a result for a gtx3076 mamba on a rb25 neo and from what I remember, it was very laggy and still fell short of a Garrett in the top end. Got to compare apples with apples and mamba results are far and few between.

Ok the e85 is this the flexi e85 at servos or a race bend? I dont know much about it.

Yeah i thought the mambas  wouldn't be as good consideeing there half the price but i havent had a great deal to do with turbos so i didnt think it would be alot if its a copy but like i said im new to this.

I'll have a look at the hypagear web site now:14_relaxed:

I didnt think of using the rb30 one i went with the rd28 flywheel, but it seems to have knocked the top end rpm around ive got to dyno it yet but seems to finish up around 6000rpm but a tune might help

Its not as bad as u would think on fuel i got 16l  per 100 thats with 3 days of beach work and a split highway and around town for the rest and i was giving it a hiding only on 11.5psi though

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

    • Very nice - I also have a 92 GTST and hardly see any others around these days
    • When I need something else to edit, I use Movavi. A friend who does video editing on a daily basis recommended me) it's an easy video cutter to use for beginners
    • I need to edit some videos for work but I'm not good at all this. Which video editor can you recommend?
    • I think you're really missing the point. The spec is just the minimum spec that the fuel has to meet. The additive packages can, and do, go above that minimum if the fuel brand feels they need/want to. And so you get BP Ultimate or Shell Ultra (or whatever they call it) making promises to clean your engine better than the standard stuff....simply because they do actually put better additive packages in there. They do not waste special sauce on the plebian fuel if they can avoid it. I didn't say "energy density". I just said "density". That's right, the specific gravity (if you want to use a really shit old imperial description for mass per unit volume). The density being higher indicates a number of things, from reduces oxygen content, to increased numbers of double bonds or cyclic components. That then just happens to flow on to the calorific value on a volume basis being correspondingly higher. The calorific value on a mass basis barely changes, because almost all hydrocarbon materials have a very similar CV per kg. But whatever - the end result is that you do get a bit more energy per litre, which helps to offset some of the sting of the massive price bump over 91. I can go you one better than "I used to work at a fuel station". I had uni lecturers who worked at the Pt Stanvac refinery (at the time they were lecturing, as industry specialist lecturers) who were quite candid about the business. And granted, that was 30+ years ago, and you might note that I have stated above that I think the industry has since collected together near the bottom (quite like ISPs, when you think about it). Oh, did I mention that I am quite literally a combustion engineer? I'm designing (well, actually, trying to avoid designing and trying to make the junior engineer do it) a heavy fuel oil firing system for a cement plant in fricking Iraq, this week. Last week it was natural gas fired this-that. The week before it was LPG fired anode furnaces for a copper smelter (well, the burners for them, not the actual furnaces, which are just big dumb steel). I'm kinda all over fuels.
    • Well my freshly rebuilt RB25DET Neo went bang 1000kms in, completely fried big end bearing in cylinder 1 so bad my engine seized. No knocking or oil pressure issue prior to this happening, all happened within less than a second. Had Nitto oil pump, 8L baffled sump, head drain, oil restrictors, the lot put in to prevent me spinning a bearing like i did to need the rebuild. Mechanic that looked after the works has no idea what caused it. Reckoned it may have been bearing clearance wrong in cylinder 1 we have no idea. Machinist who did the work reckoned it was something on the mechanic. Anyway thats between them, i had no part in it, just paid the money Curiosity question, does the oil system on RB’s go sump > oil pump > filter > around engine? If so, if you had a leak on an oil filter relocation plate, say sump > oil pump > filter > LEAK > around engine would this cause a low oil pressure reading if the sensors was before the filter?   TIA
×
×
  • Create New...