BOOSTD

Removing the vacum hose causes the BOV to leak boost-at about 13psi as there is no positive pressure behind the actuator to stop the spring being overloaded. The onlyway to properly test is to fully blank the return or inlet off. As for drivablilty on throttle back off the injectors are off, you can see on the PFC handcontroller they will state 0%, until the idle control cct is operational and enrichment problems with atmospheric BOV's arrise. Having said all that, the noise from compressor surge will definately reflect increased bearing wear and shaft movement which is not a positive. I personaly don't run BOV'S as I have found a definate perfomance improvement, and I trust Mine's product. I am expecting premature turbo failure however the trade-off is worth it. The biggest difference is in part throttle to full throttle response, this is the stage were the pressure behind the BOV is less causing leakage. You will find a noticable difference in boost levels at part throttle with the BOV blocked off. I'm sure many can here there's "blowing off" at part throttle then closing at full.

I run an ARC twin entry intercooler kit on my GTR(same as the mines one) The kit comes with plugs tp block off the BOV's. The car runs 370-380rwkw and 22psi. The combination of this cooler and blanking my BOV's resulted in 25kw extra mid-range. I don't know how much is associated to the cooler or lack of BOV's, however the bleed hole that recirculates air(whilst the BOV is closed) can only delay spoolup.

I'll be over his place tonight....what were u after?

I want to get that temp down and re-dyno now ! I had a stainless airbox in but removing that gave me 20 odd kw....what to do..

He is saying the GT2530's are are veriable turbo, they are constant performers. Power can usually be estimated against boost quite accuratly

I had three staps and chocks on her, i think it really came down to my no-name tyres ! lol

Advance is 18degrees max a full load base is 20, i'll have to check where 1 bar is I do have some pics somewhere, the manifolds are heat wrapped and also the front pipes which extends behind the front seats I have no idea what 6 or 6f is, I didn't setup the computer....=) haven't learnt that much as yet, hard enough remembering to turn the ramp up off in time after a power run so I don't get lines all over my graph lol The just jap radiator cools very well, it did leak from the cap for a month or so but has sealed up now.

Yep she's coming along, The AFR's were tuned earlier in the night for 11.4 but this was a pretty warm run. I'd done a few 24psi runs just previous but the plugs let me down.

yeah the temp was right up there, i had my pod shield out which definately didn't help much. the AFR was rich reflecting how hot the water temp was. I also have another graph with the IT at 39 degrees with 378kw. the dip was wheel spin spot on 21.5psi For the record I agree the temp shouldn't be that high, the sensor was sitting under the pods against the metal of the car so I'm guess was hotter than it should have been, I would have estimated the IT at the time to have been 54ish degrees from what the PFC was telling me. any who 278rwkw with 39degrees IT, I can post up if u would like.

I spent a couple of hours on the dyno spead out over a couple of nights. I have been using the power FC software which has enabled me to tune sooo much more easily. Mods. 87mm CP pistons Tomei poncams 260 9.15 1mm oversize valves HKS2530's with modified exhaust port to match chinese stainless manifolds ARC twin entry intercooler Blanked off BOV's (came with ARC cooler kit) Mines AFM's GTR+044 and surge tank Nismo Fuel Pressure Reg Apexi pod filters Just Jap Alloy Radiator Greddy cam gears 2x3" exhaust with 2x magic cats into a single 3.5 I also played with both cam timings and found 0 degrees to be optimal, I could get more power up top with 4+ degrees on the exhaust but at the expense of low down power. comments welcome

nismo's are exactly the same plug, size and wiring as the stock AFM

yep same, normal sound.

just get a VNT turbo. http://en.wikipedia.org/wiki/Variable_geometry_turbocharger http://www.autoblog.com/2005/11/27/next-91...rbine-geometry/

it may be running to cold spark plugs, what number do the plugs have on them? 6,7,8? 8's will act up when cold sometimes

just from what the site says..... I do like the the apexi design tho, would be more efficient than a HKS2530 given the same size. "The AX turbo incorporates the AIRICK system. The AIRICK system incorporates a patented material in between the compressor housing and the compressor blade. The insertion of this material allows near 0 clearance between the blade and housing improving compressor efficiency by almost 5-6% all across the board. AIRICK also lowers compressor outlet temperatures under high load by 50-68 degrees F. This not only improves overall maximum output, but improves the boost response right before the intercept point of the turbine." btw I run HKS 2530's =)

look like Apexi turbo's...........

These look nice....more power and better response than a HKS GT2530.... As New TWIN APEXi AX53B60P21 680HP http://www.jappartsspecialist.com/main.htm

Could have been boost cut, feels like the world is ending the first time you feel it.

heat soak is always an issue, especially sitting at the lights. The FMIC will reduce temps but not to the extent to negate partitioning the airfilter from the hot side.

insurance here : http://www.full-throttle.com.au/Engine/safeinjection.htm

I run no BOV's. The ARC intercooler kit blanks them off. Much better throttle response.

I am after an up rated gearset for my GTR. I am not interested in a dog box or straight cut gearing. thankyou matty

I have a nice video of MILF coming on boost. Car dissapears in a cloud of smoke.

hehe

yes, we cc'd them to get an accurate measurement. I used a metal shim gasket of stock thickness, 1.3mm or 1.2mm I think it was.