Project 'gozila'...

[Marko R1]

Got my new copper plugs, gapped @ .8mm and double checked with a filler gauge

My 7a's were running a 1.1mm gap...hmmm

[TiTAN]

larger plug gap is better but harder for the coils to give a good strong spark

[Duncan]

yep you should run the largest gap you can without missfiring, bigger spark = better burn = more power. 1.1 is ideal but many people gap them down as low as .8 under larger boost

[r33_racer]

dubzzzz

Edited April 2, 2010 by r33_racer

[r33_racer]

Marko how is the Nitto oil pump going for you? What sort of oil pressures do you see hot?

[Marko R1]

  r33_racer said:

Marko how is the Nitto oil pump going for you? What sort of oil pressures do you see hot?

- on cold start up it is over 6bar

- warm idle it is 4bar

- normal driving it is just over 6bar

- when i push gets close to 8bar

HEAPS of pressure on hand great for the main & big end bearings!

[Marko R1]

i am 'thinking' of upgrading the rear housings on my -10's (i probably wont be arsed yet its good to know anyway)...anyone have experience in running .86's in a twin (or single) configuration as i would liek to determine the power gain & fitment challenges as below:

- the requirement for customised dumps

- i was advised that .86 rear housing is more suited for single applications & that it might become too laggy (i dont want lag but maybe i can get away with it on a 3ltr)

- i wasnt sure if there would be adequate room & clearance to run the larger turbos in a low mount position?

here is the website, shows .86 option but no technical specs:

http://www.turbobygarrett.com/turbobygarre...R_707160_10.htm

[Piggaz]

  Marko R1 said:

i am 'thinking' of upgrading the rear housings on my -10's (i probably wont be arsed yet its good to know anyway)...anyone have experience in running .86's in a twin (or single) configuration as i would liek to determine the power gain & fitment challenges as below:

- the requirement for customised dumps

- i was advised that .86 rear housing is more suited for single applications & that it might become too laggy (i dont want lag but maybe i can get away with it on a 3ltr)

- i wasnt sure if there would be adequate room & clearance to run the larger turbos in a low mount position?

here is the website, shows .86 option but no technical specs:

http://www.turbobygarrett.com/turbobygarre...R_707160_10.htm

You dont think they would be a little big for the street? Run E85 then if you still want more (you nutbag) then go the bigger housings?

[Piggaz]

  Marko R1 said:

i am 'thinking' of upgrading the rear housings on my -10's (i probably wont be arsed yet its good to know anyway)...anyone have experience in running .86's in a twin (or single) configuration as i would liek to determine the power gain & fitment challenges as below:

- the requirement for customised dumps

- i was advised that .86 rear housing is more suited for single applications & that it might become too laggy (i dont want lag but maybe i can get away with it on a 3ltr)

- i wasnt sure if there would be adequate room & clearance to run the larger turbos in a low mount position?

here is the website, shows .86 option but no technical specs:

http://www.turbobygarrett.com/turbobygarre...R_707160_10.htm

You dont think they would be a little big for the street? Run E85 then if you still want more (you nutbag) then go the bigger housings?

[Marko R1]

  Piggaz said:

You dont think they would be a little big for the street? Run E85 then if you still want more (you nutbag) then go the bigger housings?

E85 isn't a bad idea but the inconvenience will definitely do my head in.

With the larger housings I do question the possible lag and clearance issues, anyone know what they are rated at with .82s?

[N1GTR]

460hp each

Small rears are 400hp each

[Marko R1]

  N1GTR said:

460hp each

Small rears are 400hp each

thanks steve - i expected u to know the specs

[Marko R1]

i fitted the new plugs & splitfires - runs like a dream & seems to hit harder all around

i know its probably better for the coil packs to run without the valley cover as they probably get more air ventilation, is this more apparent on the track though as mine is a street car (and the valley cover adds bling to the engine bay )

[bubba]

  Swiper the Fox said:

let me guess...you run low comp or e85?

Low comp, my 30 setup is from the days before people made 25/30 specific pistons

[Marko R1]

  Duncan said:

yep you should run the largest gap you can without missfiring, bigger spark = better burn = more power. 1.1 is ideal but many people gap them down as low as .8 under larger boost

Hi guys,

When i 1st ran my car over the weekend with my new coil packs & new plugs bcpr7es (gap 0.8mm) it was fine at the time but i only drove it for 10min. I started the car again last night & right from the onset on idle it was carrying on, coughing, very rough & could barely reverse it on flat ground so i let it run for about 10min & the idle slowly became cleaner but as soon i revved it the engine was extremely rough.

I checked the plugs & they were black like powder charcoal – very rich!

I then put my pfr7a’s (1.1mm gap) back in & the problem was fixed, drove it for an hour with no issues 

I am trying to sum up a conclusion as to the cause...both plugs run the same temp sooo it must be the gap right?

As u suggest Duncan, the larger the gap the stronger the spark & better fuel burn? It was tuned with pfr7a’s @ 1.1mm gap.

I am guessing that if i regapged my bcpr7es @ 1.1mm they would be fine.

[r33_racer]

Thanks for the info!

[Marko R1]

here is a clip on idle with cams dialed in:

here is another clip on a power run:

[Marko R1]

hi guys,

i had my gtr on the dyno for a quick health check & i asked about my exhaust (steve N1GTR prompted me on this, damn you mate im gona go broke hehe). im currently running a hks superdrager which is 3.25inch at the front, then steps to 3.5inch mid way & finished with 3.75inch at the diff.

my tuner told me if i wanted more power to increase size & run x-force front pipes (2 x 3inch pipes which collect into a 3.5inch) then with a new 4inch all the way thru to the rear.

he told me i should expect 20awkw gain or more as the larger capacity rb26/30 really doesn't like back pressure

1 of his customers cars made more than 20awkw. where does it end haha

[GTRNUR]

Thats exactly what Racepace told me when I asked them about building me a mines style front pipe with a 450awkw goal with my new engine. Bummer was that they couldnt make the pipe for me without me sending the car down to them though, seeing as all systems are custom made to fit.

[N1GTR]

Marko are you 100% sure the xforce front pipes are a true 3" into a true 3.5"?