Jump to content
SAU Community

Recommended Posts

Hii guys just wanna know is anybody running a bigger 60mm wastegate on their rb25 with 500hp? I know it's overkill but i got it for good deal so want to know ur opnion. My current setup

Holset hrc35/2 pro rated 600+hp

Sinco t3 twin scroll 

Walbro 455 + tomei fpr

Otaku ffp

Fmic

3 inch full catback exhaust

Link g4+ plug n play

Bosch 1000cc injectors

Cometic 1.3 head gasket

Stock internals

Edited by Manur33
Link to comment
https://www.sau.com.au/forums/topic/480128-turbosmart-60mm-wastegate-on-rb25/
Share on other sites

11 hours ago, KiwiRS4T said:

 I would have thought 40mm would be better.

I would disagree with a 40mm on the Sinco single gate, twin scroll manifolds. I have a 50mm on mine and it's a little bit hard to control boost.

17 minutes ago, Dose Pipe Sutututu said:

I would disagree with a 40mm on the Sinco single gate, twin scroll manifolds. I have a 50mm on mine and it's a little bit hard to control boost.

Was it gen v 50mm pro gate, coz even tuner recommended to get a smaller 45mm one 

I had put a 50mm  Synapse W/G on my RB30 with a GT3540 on a Sinco manifold only because I got it cheap (I would have preferred the 40mm one) and it held 22 psi controlled by my Link. 

Who is your tuner? If he is reputable tuner with a good track record why would you not take his advice?

2013.11.21 Boost curve 001.jpg

15 minutes ago, KiwiRS4T said:

I had put a 50mm  Synapse W/G on my RB30 with a GT3540 on a Sinco manifold only because I got it cheap (I would have preferred the 40mm one) and it held 22 psi controlled by my Link. 

Who is your tuner? If he is reputable tuner with a good track record why would you not take his advice?

2013.11.21 Boost curve 001.jpg

It's rapid performance from Timaru, nah he's already recommended me 45mm but i end up buying a 60mm gen v for brand new on good price from a friend so just curiousity to know does it make the car way too loud haha

26 minutes ago, Manur33 said:

It's rapid performance from Timaru, nah he's already recommended me 45mm but i end up buying a 60mm gen v for brand new on good price from a friend so just curiousity to know does it make the car way too loud haha

No it won't. Let us know how it goes (dyno after the lock down ends)!

I have a new set up with the new g35 900 on my built 25 and was getting bad boost creap on my 50mm gate,.was told a 60mm gate would control it but the problem is they are a big gate and you will run into problems fitting it into the area, ac lines get in the way, dump gets in the way, ABS bracket gets in the way you get my drift, my point is you can be up for some big money just to fabricate it to fit, but the 50mm you wont have any problems.

  • 1 year later...

After looking around everywhere online like most people, i ended pulling the trigger on a turbosmart 60mm gate for my 2.5 Neo.

My reasoning;

- circuit 'track day' car with occasional street use, mid-and-up power preferred

- targeting up to 40psi boost with ATR45-SS2 (gt3582 similar), Vband in and out.

-6boost single scroll manifold (looks to be difficult to mount wastegate at efficient flow angle).

- running e85 most of the time

- engine is built with nice parts so should be reliable with 9000rpm (soft fuel cut) redline.

- i don't want boost creep at high rpm/boost levels, and with less-than-ideal angle into wastegate at manifold (due to packaging), decided on the 60mm gate hoping the Haltech elite 2000 with good tune can eliminate any 'boost droop' issues (for lack of a better term) when that big girl first opens. 
 

keen to give it a try anyway...

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

    • Stock ECU (or more accurately stock tune) absolutely refuses to go over 10psi and behaves like you have seen. The Nistune is the same if it is the stock tune. If the Nistune chip has been tuned, the resulting tune could be literally anything for any combination of parts. The Nistune just makes the stock ECU Tunable.
    • So stock ECU does not like anything above 10 psi?  That Nistune one is just for "try" if it will be any different, I know it need to be tune for that. I know but YOU may know about these problem but i/we dont. They few little Skylines here let alone people who know anything about tham so that is why iam asking here  
    • So now we have a radiator with no attachments whatsoever. It lifts up with a particularly tight spot between the drivers side air box mount and the lower radiator outlet, but if you've got this far you will sort that too. This is the lower mounts with the rad out so you can see where the rubber bushes go, it is a straight shot upwards Done! Assembly is the reverse of disassembly, with blood less likely to be shed.
    • Right, onto the second last trick. The Air Con condenser is mounted to the front of the radiator and stays in the car when the radiator is removed. There are 2x 10mm headed self tappers holding the top of the condenser to the radiator, remove those The bottom of the condenser is attached to the radiator with clips. You need to lift the condenser out of those clips and clear (up, then forward). f**ked if  could work out how to do that last bit with the front bumper on. I hope you can, and you share the trick.  Bumper removal probably deserves its own thread one day once I've recovered the will to live, but basically you need to remove the wheels, front inner guard liners (clips and 10mm headed bolts), the self tapper between the guard and the bumper at the rearmost point of the bumper (same as an R32 that bit), any remaining clips at the top/front of the grill, an absolute bastard design with a plate that holds the top of the bumper above the headlight each side (only 1 bolt which is tricky to get to, but the plate catches 2 places on the bumper and must be removed....carefully!) and push clips between the bumper and guard under the headlight. If you've done all that you will be faced with wiring for the fog lights on both sides and in ADM Q50 RS at least, 4 nasty tight plugs on the driver's side for the ADAS stuff. So, the clips at the bottom look like this on drivers side (looking from the front) And on the passenger side (also from the front), you can see this one is already out Clearance on both of these are super tight; the condenser needs to move up but the upper rad support mount prevents that, and the radiator can't move down far because it is (rubber) mounted. Once you achieve the impossible and drop the condenser off those mounts so it does not stop the rad moving, you are good to go
    • OK, next the shroud needs to come off and there are a couple of tricks. Firstly, there is a loom from near the passenger side headlight to the fans, coolant temp sensor etc and there is no plug to undo.  In my case I was OK to leave the shroud on top of the engine so I just undid the passenger side fan plug and about 10 of the clips which gave enough free wire to put it aside. The fan plugs were super tight, the trick I used was a small falt screwdriver to push down on the release tab, then a larger flat screwdriver to lever the plug out of the fan unit....be careful with how much force you apply! If you need to remove the shroud altogether for some reason you will have to deal with all the plugs (tight) and clips (brittle)....good luck. I removed all of the clips and replaced them with cable ties that I will just cut next time. Also, in the Red Sport / 400R at least, the intake heat exchanger reservoir hose is bolted to the shroud in 2 places with 10mm headed bolts; so remove them (the hose stays in the car; no need to undo it at the t fittings down at the radiator lower mount. Once you've dealt with the HX hose and the wiring loom, there are 3x 10mm headed self tappers holding the top of the shroud to the radiator; remove those.   The shroud then lifts out of the bottom mounts where it sits on the radiator, up and onto the engine out of the way. Simples
×
×
  • Create New...