S13 SR Greddy intake manifold write up.

[RbPowered240z]

now can someone show me how to do this with a s14 manifold?

[burnsauto]

its not that much different from an s14 manifold...same basic ideas....


its actually more similar now with the newly designed s14sr greddy intake manifold.

[s13silvia123]

i have a question about the IACV.

i'm thinking of deleting it on my greddy intake manifold.

will it affect my standalone and what measures do i take to delete it besides welding it shut or blocking it off.

this is for those who deleted the IACV

[om3ga]

Originally Posted by s13silvia123

i have a question about the IACV.

i'm thinking of deleting it on my greddy intake manifold.

will it affect my standalone and what measures do i take to delete it besides welding it shut or blocking it off.

this is for those who deleted the IACV

I deleted it on mine although my engine is not running yet, i ran my dohc ka the same way with no iacv. Works fine im not sure if it will affect the standalone im assuming no because i have seen alot of standalone users running no iacv. I have a block off plate for the s13 sr if you want to get it its made out of 1/8 aluminum. Lmk

[GSXRJJordan]

Originally Posted by s13silvia123

i have a question about the IACV.

i'm thinking of deleting it on my greddy intake manifold.

will it affect my standalone and what measures do i take to delete it besides welding it shut or blocking it off.

this is for those who deleted the IACV

Stew (Jonny5) deleted his on his S14 SR and said that even with his big cams, all he had to do was bump the mechanical idle (via the throttle stop set screw) up to about 1000-1100rpm and it idles great, and more importantly, it comes back from idle solidly after drifting/etc.

I thought about doing this on my RB25 Greddy manifold, but figured the high idle might be a giveaway on the street that the motors not stock, so kept it.

[burnsauto]

yeah if its a dedicated track car, i dont see a problem with getting rid of the aicv, but my general rule is if it on the street more times than the track, run the aicv.

Its really not that hard to hook up, its one plug, and two hoses. woohoo.

[rebornS14]

sorry to dig up old threads but what do i do with the two hoses that are supposed to connect to the throttle body?

[!Zar!]

Originally Posted by rebornS14

sorry to dig up old threads but what do i do with the two hoses that are supposed to connect to the throttle body?

Coolant hoses.

[om3ga]

Originally Posted by rebornS14

sorry to dig up old threads but what do i do with the two hoses that are supposed to connect to the throttle body?

Bypass them, just run one long hose to both ends. Its better that way, unless you live in the snow.

[rebornS14]

got it. had to drill out the tabs to line up with the manifold. thanks guys.

[2fast4y0u]

^ you have to modify the tabs if im not mistaking...i didnt have to on mine and it fit fine.

[mikey_S13]

soo when you delete the IACV .. where do you run the big vacuum hose that goes to the intercooler pipe?

[aa87]

Eliminate it.

[s14unimog]

since this thread got dug up I want to remind everyone of the dangers of running the S14 pulley on the GReddy or GReddy style intake manifold. The stop on the pulley WILL hit before your pedal hits the floor. I have destroyed a head by sucking in the screws from the throttle plate after it broke. Effectively that little stop will support your "floored" foot pressure and transfer that load into the throttle plate hinge separating it at the first screw hole. The only solution to safely run this setup is to add an additional stop to the bottom of your pedal. I now weld my throttle plate screws to the hinge just encase. Don't suck in a screw!!!

Originally Posted by mikey_S13

soo when you delete the IACV .. where do you run the big vacuum hose that goes to the intercooler pipe?

it's not a "vacuum" hose.

[BlackZenkiS14]

Subscribing, so I can easily find this and reference it later.

[EsChassisLove]

What is the hose connected to the cold pipe even for? Because i dont have one lol.

And is there any way I can get one of those modified throttle cable brackets? I do my manifold Friday.

[lovesilvia]

soooo, i installed a replica version of this intake manifold. i bought it on enjuku racing and of course looked at some reviews before and they said its work just as same. so my boyfriend and i worked on installing the intake manifold for almost 2 days. changed all the lines, re-did everything to make it look really nice.

now the problem is, when i start up the car, it does NOT hold any vacuum pressure. i went to 0 psi, and we have tried everything looked at all the lines and see what can cause this problem. so i dont know what is going on with my little silvia. if you guys can help me out this is my first car and the first time i ever fixed a car.

1989 240sx Coupe
Sr20DET Black Top E5
Fadanza 11 lbs flywheel
ISIS 3 inch full exhaust
Megan Exhaust Manifold
Greddy RS BOV
FMIC
I just bought a S-AFC II not hooked up yet
and so much more.

my co-worker at work told me it could be that my intake is holding more air.?? do you think that it can air fuel? or something i really need the help!!

thanks in advance.

[s14unimog]

Originally Posted by EsChassisLove

What is the hose connected to the cold pipe even for? Because i dont have one lol. And is there any way I can get one of those modified throttle cable brackets? I do my manifold Friday.

The connection is to provide your IACV with a metered air supply to control idle. The SR can be run without one but it'll need to be properly deleted and you'll need to adjust the throttle body to maintain an idle; the revs will have to be higher as well.

Originally Posted by lovesilvia

we have tried everything looked at all the lines and see what can cause this problem.

my co-worker at work told me it could be that my intake is holding more air.?? do you think that it can air fuel? or something i really need the help!!

Look again or pressure test the charge system to inspect for leaks. Something is obviously leaking. Your co-worker is an idiot, increasing the plenum capacity has nothing to do with issues holding vacuum. You shouldn't install parts you don't understand....

[lovesilvia]

You shouldn't install parts you don't understand....??

this is my first car i was trying to fix.. and i've asked my friends and they said it might be my MAF? i have no freaking idea im still learning how to do this. how would i check the pressure ?

[2fast4y0u]

Here is a link to make one
How to make a homemade boost pressure tester for a turbo car | Video « Wonder How To

could be intake manifold gasket...did you replace it when you installed the new plenum. if so, what gasket did you use?

also, check to make sure all the plugs in the bottom are secure. they are there for various vacuum sources and if they are not sealed properly, they will leak.

[BNASTYs13]

nice write up. just helped me out

[coupster]

Great writeup, the only thing I would say is in your step two in the beginning about letting fuel pressure drop waiting a few hours is not necessary. What you could do is remove the fuse for the fuel pump try to start the car and run it until it dies. That should do the trick removing fuel and pressure from your lines. When your done you put the fuse back in and she should start up like a champ.
Good luck guys!

[nissanduster]

really nice man

[heiyuu]

Originally Posted by coupster

Great writeup, the only thing I would say is in your step two in the beginning about letting fuel pressure drop waiting a few hours is not necessary. What you could do is remove the fuse for the fuel pump try to start the car and run it until it dies. That should do the trick removing fuel and pressure from your lines. When your done you put the fuse back in and she should start up like a champ.
Good luck guys!

Hey I was thinking the same thing! Except you could just unplug the fuel pump in your trunk.

Had to do this trick unplugging the FP before I changed my fuel pump, and also upgrading to a 300zx fuel filter!

[yeeaaboyyy1369]

sorry to dig up an old thread, but i had a shop do mine when they put my new motor in (i work alot, so i had to send it off). its a knockoff but looks exactly the same. they gave the car back, and said they couldnt figure it out.... so now the car starts, runs at like 1400 rpm, then chokes itself out with fuel and dies within ten seconds. i looked at the manifold, and the PCV valve isnt hooked up to anything. its just open. so where does it go? it appears everything else is correct, but that goes nowhere. also, the two bolts on the back, the outer one is connected to the brake booster, but the inner is blocked off with a screw..... any ideas? thanks!

[yeeaaboyyy1369]

No one?

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[conrad_s13.5]

nothing should be blocked off.
im not 100% to be able to tell you, but i know i just looked at my stock set up and just set it up the same and never had a problem,... i can get a pic of mine up later tonight if there isnt a definatly answer up by then.

[yeeaaboyyy1369]

Originally Posted by conrad_s13.5

nothing should be blocked off.
im not 100% to be able to tell you, but i know i just looked at my stock set up and just set it up the same and never had a problem,... i can get a pic of mine up later tonight if there isnt a definatly answer up by then.

I can't find any missing or broken lines other than that, but there is a two prong harness right there that isn't connected to anything. It comes out of the same harness as the injectors, and tees off. One side goes to this two prong, the other side goes to the four prong iacv harness.... What's this supposed to go to? It's the only thing I can find that looks out of place

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[Seraphim38]

does anyone have a before and after dyno sheet for the installation of only a Greddy Intake Manifold, on say a GT2871R powered SR20DET? I haven't ever seen one and don't know how much there is of a loss of bottom end and gain to top end really is.

[slider2828]

I don't think off hand.... I was on stock manifold and just got an ISIS, but I need an engine rebuild sooo might not be till next year, but I will post back then.