Now I'm not looking to get flammed, people who know me here know I'm serious.

How do I know if my engine is ported?

Here are my mods:

Just put in a J-Spec swap on S4 base mosel, 120PSI on all corners (WTF?!), NOT PORTED WASTE GATE or atleats I think so....I never ever creep according to my autometer boost gauge, 720cc secondaries, RB full exhaust, K&N intake, Cusco Flywheel and clutch kit, Boost at 8 PSI (never more), stock ECU, NO SAFC, removed butterflies on TB, Light weight 16' Konig wheels (14.3lbs pounds each), GXL LSD, Koyo Rad....Thats it.

I beat a 1999 carrera 4 by a car in 3/4 third gear. I also beat cars I never even thought I would...

Thats why I mmade the knocking thread, leaning out thread, a/f ration=numbers thread and such.

I really think my engine is not stock and I am afraid of leaning it out with only 2 550 primaries and 720cc secondaries. When I got the engine, all injectors were of black color, I thought it was weird but made nothing of it and put new ones all around.

Also, at high rpms, it makes a real aggressive sound I never heard before on any rotary.

I'm truly worried. How do I find out if my engine is ported. I really dont want to lean it out.

Thank you.

 

post a vid and we can tell you

 

By hearing it?

Tell me how you will know and that would help me greatly.

Thank you.

EDIT: I forgot to add one main point. My my cusco clutch sometimes slips when I shift from first to 2nd gear.

 

Anyone? Please.

 

Open the engine up and look?
That's probably not the answer you're looking for, but that's the only certain way to confirm.

Do you have a boost gauge that reads vacuum?
If so, we might get a hint depending on your vacuum reading at idle...


-Ted

 

At idle I'm around .5 to 1 vaccum.

What does that tell you?

 

What kinda units?
Bar?
kg/mm^2?
0.5 to 1.0 is a huge spread - how come?

What RPM is the idle speed?
Ignition timing is stock?


-Ted

 

Ignition timing is stock.

Units are in PSI

RPM is idling at 950.

I'd have to go start the car to know exactly where the boost gauge idle at in vaccuum, but my car is in my garage at home since its raining today... When I said .5 to 1 vaccum, I ment between .5 and 1, closer to 1 PSI.

Thanks TEd.

 

Sure you dont mean bar?

 

Yes. Its an autometer boost/vaccum gauge.

 

If its autometer its more than likely in "In. Hg.", and if its only 1 inch of vacuum, something is wrong. Good idle vacuum should be around 10-15 depending on condition of engine and idle speed.

 

I am telling you, ITS IN PSI! I bought it myself, chose it my self and installed it my self. It in PSI.

Thank you.

Now what does that tell you, Ted.

 

I don't know about Ted but it tells ME that you don't know WTF.

You don't measure vacuum in PSI.

 

I don't think I've seen an autometer boost gauge with PSI readings for vacuum?

 

Probably I dont know ****...since I am asking.

But I have a boost/vaccum gauge. 0 is dead center. Let me find a pic.

 

here it is.

Well, its between 1-2 of vaccum when I look at it. Its always between 0 and the first bar on the left at idle.

So, is that normal?

EDIT: Ok, so I'm an ignorant fool. 20lb.Boost/30in.

So what is in.?

 

You said it was pulling .5 to 1 PSI of vacuum?

That barely registers on that boost gauge.

You should be pulling 15-20 in. Hg at idle, in other words, 7.36 - 9.8PSI

Read the little words under the "30" on the gauge, it says "in. Hg."

 

Vaccum cannot be in PSI, no?

But its registers between the first bar and zero on VAC side of the gauge, at idle.

Is that stock?

 

Wtf!? At idle its supposed to be betweem 15 and 20!?! I'm reading a bit more than 0. Wtf does that mean?

 

first bar being 10 inches of mercury (in/HG)? or the first bar meaning literally the first bar before 0?

A healthy stock port engine should pull approx. 15 in/HG at idle. A really strong engine will pull 20.

My 1/2 bridged engine @ 1500rpm pulls 7-8in/HG or roughly half of a healthy stock port engine.

Edit: that means one of a couple of things, your engine is wearing out/has low compression, you have a vac leak or its been ported.

With that said, the level of vaccum you're reporting would need to be a full bridge port in order to be that low. a "street" style port wouldn't even lower the vac much beyond 10in/hg unless it was a GIANT streetport. Having not even 5 almost sounds like there's a vac leak.

 

No, if the gauge measures VAC in in. Hg, then 10 inches is not stock. The first thick bar is 10 in. Hg.

Mine hangs at 19in. Hg.

My engine isn't tuned, so it eats spark plugs every 3 weeks. I can usually tell when they're going out when I get lower than usual vac readings at idle.

 

So what does it mean if I'm pulling next to 0 at idle? My gauge is wack?

I'm freakin paranoid.

 

I don't see why not. lbs per square inch. negative number should indicate a vacuum, that's all. at least that's what I would think...

 

We can easily solve this problem right now. Do you have a camera? take a picture of your gauge when the car is at idle. Post up.

 

Even easier and I can do it right now.

Thats where my gauge is when the car is idling...dead center on the blue spot.

PHOTOSHOP SKILLZ!!