Boost question?

[Nismo_line]

ok so i was having a problem before where when i would go on the highway and as soon as i gave full throttle my r32 gts would go to boost up and when hit full boost the turbo would make a popping sound so i guess the car was going into safe mode. i had to swap out my gauge cluster for a new one and this new one doesnt have the stock boost gauge it has a voltage meter instead but i have hks boost gauge and to hook it up i just unhooked the vacuum from the box on the firewall for the stock boost gauge. so i found out that unhooking that it made my turbo pop so i plugged the line back into the box but i t'd into it for my hks gauge. my car is still doing it alittle at full throttle so my question is could it be because my new cluster doesnt have the stock boost gauge or could it be because i t'd into? where do you guys run you vacuum line for a boost gauge?

[Skym]

I have mine hooked up (map sensor > vaccum hose > T fitting) to 6mm ID vacuum hose that goes from intake manifold to top of BOV (intake manifold side of 6mm ID hose).

Missing at high rpm can be due to not gapping sparkplugs down to 0.8mm from stock 1.1mm or have wrong heatrange.

[Nismo_line]

i put new plugs in they are e3s i forget which model number but i checked from the stock number on the plugs it supposed to have to the model number of these plugs

[Skym]

Stock is NGK PFR5A (Platinum) with -11 for 1.1mm gap. Upgrade is one heat range colder (leaning out A/F ratio with exhaust, intake, etc, so cylinder temps rise), NGK PFR6A with 0.8mm gap.

[Dragon Humper]

You can't custom gap E3s so they are only a good choice for N/A engines.

I like the Autolite AR3923 race plugs, they are a plain copper plug with a fat ground strap that is slightly cut back for good spark exposure and detination resistance. I have been forced to run the gap to .7mm to combat flameout (stuttering) at 1.5bar (23ish psi).

I personally have had issues with Platinum tips comming off of the center electrode in turbo cars (both the GTR and others) and causing massive misefire issues once that happens.

That and I feel that they cost WAY more than they should. I only use them in N/A engines that you don't wany to service for about 100,000 kms.





Jon.

[Nismo_line]

so what plugs would you recommend to run like the heat range and brand for stock boost rb20 with hks exhaust and intake ?

[Nismo_line]

anyone? i am gonna go pick up some new plugs in a bit and want to knwo which ones to get any help appreciated

[markc32]

BCPR7EIX

one heat range colder wit .8mm gap

ok for stock boost but better if u run higher than stock boost

[Nismo_line]

so it already has a .8mm gap?

[Nismo_line]

ok well its like impossible to find the bcpr7eix in manitoba and hard to find the 6s but i found some and gonna go with that hopefully that fixes my problem

[M13]

Bkr7e

[markc32]

so it already has a .8mm gap?

yea its gapped already....try lordco they can get it i got it from lordco here...u have a lordco there in peg?

[Nismo_line]

dont think and i already bought some 6s and gapped them to .8 but guess f'in what so i finished getting the plugs in and putting everything back together. and place my ratchet and socket on the front of the car and go to start it and the f'in thing falls in and takes ok my ac and ps belts like no way i am so pissed and cant believe that happened well looks like tomorrow shall be a great day of fixing. Does anyone knwo if a ps and ac belts from a 300zx would work? they are the same width and same amount of ribs and really close in lengths

[markc32]

sorry to hear man but **** happens....anyways im not sure if its same as 300zx....but here are ur oem part numbers n look up what other nissans uses it

ps belt - 1195024U05

alternator belt - 1172024U00
alternate: 1172024U01

ac belt - 1172077A00
alternate: 1172077A00TM

[Nismo_line]

ok belts are one a 300zx belts work the ps belt is tiny bit loose but it works fine and the plugs helped my problem no more miss fires i am a happy person now just sucks my car is going into hibernation today