burn4005

what do you mean? it's just a 4 port MAC valve. (46A-AA1-JDBA-1BAA) [/img] they're 100ish bucks delivered on ebay. http://www.ebay.com.au/itm/HI-TEMP-MAC-Boost-Solenoid-Valve-BCS-4-port-AEM-MAC-46A-AA1-JDBA-1BA-NICKEL-/232031631192?hash=item360629b758:g:WrMAAOSw3ydVzVlf

why isn't everyone that runs external gates or a dual port actuator for IWG using a 4 port boost solenoid? seems like the obvious choice to me. at 100% duty you KNOW the gate is clamped shut.

nope. for a given pressure and mass flow, Air velocity through a given cross sectional area at 800 degrees C is approx. double that of air at 290 degrees and triple that of air at 100 degrees with pressure held constant. no idea what the gas temperature at the rear muffler is though.

HKS GT2530s (was making 411kw at around 24psi) and a mines equal length front pipe, which sounds GLORIOUS. so I'm on the hunt for an equal length runner split pulse T4 manifold if anyone has a recommendation? most manifolds seem to put the turbo right up front and cyl 1 runner is half the length of cyl 6 which affects the sound to my ear. I would like to find one where they're all the same length (for the high pitch sound more than anything) It looks like the EFR compressor is massive so it needs to be located in front of the strut tower? or does placing the turbine between cyl 3 and 4 (like the old HKS and Greddy manfolds that they stuck a T04z on) still fit? Its an R34 GTR btw.

not to mention ignition coil dwell.... voltage drop is always an issue. especially if the ECU doesn't see it to compensate for injector deadtime and coil dwell. I've had cars missfire and voltage at the ecu looks fine, but the coil voltage was low due to a high resistance contact in the ignition coil power relay and at 7000rpm the current draw through it was significant. coil power is the square of primary winding current, so every amp is important. ps..Just bought an 8374 1.05.. f**k you guys for making me do it!

jayzus! haha and people go on about 3.5 inches not being enough when they're running 400ish kw. nice result!

ball bearing GT2530 for an RB26, receipt says $980. was a couple of years ago now. no details on receipt, but i believe it was a full reco with a new CHRA., cleaned housings and wheels etc. looked new when i got it back.

I've had HKS2530 rebuilt by Rotomaster in Somerton VIC (garret/honeywell distributor).

luckily I had HKS actuators, and they are bolted to the bracket rather than welded on (I think the garrett ones are welded to the backet, so won't work): and the turbonetics ones also have the two bolts in the same place. they went in with a fair bit of swearing, but only an hour or so work. the support rods on the HKS brackets are in the way when you're trying to get a ring spanner on the actuator bolts, but got there in the end. rear actuator ports point outwards, front actuator ports point inwards so they don't foul the intake piping. you also need longer actuator rods.. i got mine from GCG. you need two of the 1/4 UNF thread 80mm actuator rods for them to reach the wastegate flapper. 4 1/2 turns of preload has them making 8psi on wastegate pressure alone. making 14psi at around 40% duty on the mac valve, and they are VERY sensitive to duty cycle changes. only a few % here and there makes a few psi difference. had a few coil issues so didn't go any higher until that's sorted.

only if you mount it inside the surge tank.

there is something about a 600whp stock looking engine bay.

holy hell that's a lightning bolt at 1.1mm.. no wonder they're pricey

Just an update here, I've decided to go a set of genuine R35 coils (22448-JF00B) and make up a bracket for them to sit in. as I have an R34 gtr, the coils are plug and play. interesting to note, is the stock R34 coil dwell is around 2ms at 14v, and the R35 coils are 4.2ms.. so I'm expecting MUCH stronger spark, as evidence of this, the AMS alpha package cars making 1500+hp still use stock R35 coilpacks. I have direct wired power through a relay from the engine bay main 12v+ post for the coil power as well. using the standard 12v+ from the ECCS relay as the activation signal for it.

can recommend the 14 point 7.com spartan controllers using the LSU4.9 sensor. they're 75 USD for the controller. basic, but have a 0-5v output and are cheap with automotive grade gear. haven't had an issue with mine. haven't used the sigma 2.1 controller but has a display and multiple inputs if you're into that kinda thing. http://www.14point7.com/products/spartan-lambda-controller-2

Champion. Will give it a crack.

Hi Guys, it seems my CAS is starting to make some noise on my GTR at high revs.. its a R34 so its the Hitachi CAS. are the bearings on these a replaceable item? or is it a bin the whole thing kind of deal? i'f it can be repaired does anyone have the bearing specs? I'll also throw in a reduced resolution trigger disk at the same time. Thanks in advance. Alex

ah which compressor cover are you using?.. I am using HKS2530 turbos. it may be that the bolt pattern on the back side of the GTX compressor housings are a larger radius from the centre, so the alignment wouldn't work, as that is where the actuator bracket attaches. not sure if they are or not. but if people are putting -5 comp covers on a GTX core, then I dont think they would be different unless some machining of backplate to comp cover is required to fit the compressor cover to the core.

I've got them on an R34 and they fit fine, tight to get them on there with the turbos mounted and in the car, but possible. haven't had huge boost through them yet as we we having misfire issues. had to use the HKS actuator bracket as it holds the actuator with two bolts, so the turbonetics fits straight in, whereas the garret actuators are welded to their brackets. I didn't realise HKS did a dual port actuator? do they make one? the only reason I went the turbonetics ones is they were the only dual port stock looking gate on the market (that I could find) the advantage of dual port is low preload, so the diaphram can respond faster. it uses MAP pressure to press the wastegate closed when the boost control solenoid is active. so my gate is set to 8psi preload, so you can either go a single port 25psi preload actuator, and it will hold 25psi worth of pressure, or a dual port actuator at 8psi preload will hold it shut with 33psi of pressure. the more preload, the greater the offset. also means I can run 8psi in Girlfriend/Valet mode, 22psi in Petrol mode and 28psi in E85 mode.

Yup, same same. Everyone just puts a sticker on the conti sensor and doubles the price for their effort.

they're the all-in-one R34 Coils so no igniter required. if healthy OEM coils can handle 660awhp@ 28+ psi in the car above, that's good enough for me. I'll just get a new set, but if i need to go beefier I'd be interested to hear what Ryan1200 and His mate have done.

Slightly off topic, but what is the ignition system on that car? Im aiming for similar boost on e85 and am having ignition issues with old nissan coils.

Well I for one am very impressed. Thats a fantastic power curve. Its a prick of a job, but i have done it on my hks2530s, turbonetics make an oem size dual port actuator (part is 30326) that fits the hks actuator bracket. Need 1/4 UNF 80mm actuator rods from gcg for it to fit, and a 4 port mac valve but its a good option to keep the gate shut. Are your gates creeping open at high exhaust manifold pressures or are the turbines just falling over? I guess at those flow rates your post-turbine exhaust pressure becomes quite significant.

I understand what you're saying, but I'd rather not waste another Dyno session if the general consensus is they won't be up to the job based on peoples experiences.

Hi All, Hit the dyno last night and was getting missfire/spark breakdown at 14psi and above, mainly on cylinder 1 according to the plugs. increased dwell, gapped the plugs, dielectric grease. issue never went away. eventual goal is 27-28psi on HKS2530s on a 2.6L running E85, a hail mary ~600whp. the question is will Brand new OEM coils handle this kind of cylinder pressure? If so, I will buy them, or will I need to go to another solution like Audi R8 COP coils, or something more difficult to mount/install like LS2/IGN-1A coils. the D585 Yokon COP kits are a non-starter as far as I'm concerned. Cheers Alex

Yea time flies.... Im talking about the guys in the last 3 or so pages that are in the process of doing the gtx thing. Havent heard anything for months.. Interesting about the 67s in the hks housings... Ive got 2530s on mine currently. Going on a stroker or 2.6?