What do I need to safely run 15psi & 300hp+?

[m_melen]

alright, thanks for all this support guys!

I'll go with 500 or 550cc injectors. The ones I've seen are usually expensive so I might look for lightly used ones.

Used GTR fuel pump it is!

I'm sold on the Gizzmo intake gasket, I'll start looking for a price on that.

As for the head gasket: If the tomei gasket is 2.5mm bigger than the stock bores, do they ever cause problems from not being the exact size of the cylinder? From what I've learned you want a pretty controlled compression/combustion area and a little groove all around the side of the top of the cylinder would affect the proper flow/combustion. Re-boring out the cylinders to 80.5mm seems like a big change, is it common to bore them out only slightly and leave a slight difference in gasket vs cylinder bore?

I'll start looking at Nistune, are there any limitations to what it can control that most of us would consider important? I'd need to be able to control pulse width with new injectors so I don't have black smoke pouring out the back of my car.

So what I'm understanding on the MAF issue is that the stock gts-t maf just won't recognize anything past a certain amount of air so the computers won't be able to compensate for the extra air. Is this right?

And finally, on the topic of used injectors and fuel pumps, is there any way of testing them to make sure they work well before I install them? Short of hooking up the fuel pump to a battery and a huge container of gasoline with a stopwatch and seeing how much it puts out in a certain time.

[m_melen]

the gizzmo gasket is 89 bucks US, plus 3 bucks US shipping, 30 bucks foreign shipping. good thing i can pick it up in the US!

[RyanGTS-T]

Suggested retail price is here (scroll to bottom) -

http://gizzmousa.com/thermal-gasket.html

Hmm, $99 american... I just got 3 stock intake gaskets for $15 all together + shipping.

[m_melen]

nah, its 89. the suggested msrp is 99. you have to go to the buy now option to see what they charge for it.

[RyanGTS-T]

nah, its 89. the suggested msrp is 99. you have to go to the buy now option to see what they charge for it.

Oh, I never click those. Next thing it's asking me for a visa number.

[m_melen]

yeah, they often ask for shipping info before they'll even give you a final price. soooo, any opinions on my previous post about the mods?

[RyanGTS-T]

Fuel injectors, make sure you get high-impedance or "saturated" injectors. GTR's use low-impedance injectors and you will need to make resistor packs for them to work on your GTS-T.

[m_melen]

what do saturated and high/low impedance mean for injectors?

[RyanGTS-T]

what do saturated and high/low impedance mean for injectors?

Saturated = High impedance = Higher Resistance (around 12.5 ohms)

Peak and Hold = Low impedance = Lower Resistance (around 2.5 ohms)

[WildCard_]

for injectors, these are decent, and drop ins.

http://www.deatschwerks.com/catalog/product_info.php?products_id=114

[Skym]

From what I understand low independance injectors react quicker to changes in engine due to needing less voltage to open fully (suited to fast responding engines like RB26DETT). High independance needs a bigger voltage to open injectors thus doesn't react as quick (suited to slower responding engine like RB20DET).

With headgasket, I think the headgasket deforms when torqued down. As far as I know it's what Tomei recommends for stock bore. I think forged pistons are 0.5mm oversize.

With Nistune, any map, table, etc the ECU has for MAF, injectors, etc is accessible via laptop. Changing injectors can be done by just typing the old injector size (cc) in and the new injector size (cc) in via tuning software and tables for injectors are automatically adjusted to suit. Then fine tune at idle, etc and tune engine. Changing MAF is as simple as selecting the upgraded MAF type from dropdown menu. It's as simple as it can be.

Have a look at this videoclip to understand what Nistune is and what some of the features (there are more) can do -

http://www.youtube.com/watch?v=WjQJxWSEgHE

R32 uses the consult plug instead of plug (side of ECU), cable on the car in videoclip.

As far as I know with MAF, yes.

Injectors can be cleaned, flow tested as not every injector flows the same cc wise. When doing injector resizing on stock ECU, it's best to set cc amount of bigger injectors to the lowest flowing injector.

[m_melen]

okay, i understand the injector differences. those deatschwerks injectors are REALLY reasonably priced, does anybody else have an opinion on them? 369 bucks for 550cc is definitely affordable.

there's no reason why i shouldnt used the tomei gasket on a slightly overbored cylinder is there?

I'll be going with the z32 maf. I'd rather my car knows more than less and that seems like an important bit of information.

NIStune for sure. I don't have experience tuning myself, but I've got a local shop I like that would be happy to help me out when I first get it.

I think this is going to be a summer-long project.

[m_melen]

NIStune is selling for 320 USD plus shipping for the board and software. Sweeeeeeet!

[WildCard_]

good price for sure.

[Skym]

More for your buck mod.

You'll need the Consult cable for laptop, so add that to the price. It's a really cool cable, as it has light's to tell you if it's connected or not, reduces errors, etc.