Loosing 1 Psi is an EPIC LOSS no matter how much more efficient you think it is..

 

I've still not been swayed to the otherside of the discussion btw.. I need this explained to me, if I'm wrong..

I still think that if you port the blower and allow it to flow more air (which is what porting does.. and what it means when you throw the efficiency word around) that it HAS to make more boost, not less if you change nothing else.

The supercharger is what supplies the air (while under boost), the engine is what creates the restriction on the airflow... So, if you make the SC supply more air.. without changing the engine (the restriction).. the pressure will raise because you are supplying more air and not letting it exit any faster..

I think i've said the same thing 10 times in this thread now..lol

 

....not really. it ran alot better and seemed a bit faster.

ya but the car needs less pressure to create the same amount of work

 

I am positive I can tune these cars bud. I know hes asking about the s/c and throttle body but if the OP is going to have any work done he might as well have work done that is going to benefit him. The most restrictive part on the lsj engine is the head, if he pays to get it ported or has the knowledge to do it himself he will see MASSIVE gains, unlike porting the s/c or tb.

Also I highly recommend NOT porting the s/c and throttle body if you don't know what your doing and you haven't ported things before.

 

I don't recommend porting a head yourself..... ever. Unless you've done it many times before. It's not as simple as shaving some metal unless you are ONLY porting the exhaust port openings

 

+1, never touch a head yourself unless you have plenty of experience in porting. I still highly recommend the op skips the petty tb and s/c stuff though and ports the head. For 450 bucks you can get a ported head that flows around 300 cfm. I will have mine here in a couple days and will put up some pics. I will also have dyno results soon too.

 

Your head vs. my ported head.

And, porting the s/c is fine to do. It's not a HUGE performance mod, but every little bit does help and lower IATs (5-10*) and slight improvement in efficiency is always a plus. Will only help.

 

Who did your porting tom and what did it cost?

 

Euthanasia. And let's leave it at sponsorship status. No, it wasn't free. But he has done a WONDERFUL job on my supercharger. I have a vid of the head... give me a second



Who did your's?

 

Euthanasia also did my head. Notice how the video before that has my name on it.

http://s164.photobucket.com/albums/u...lsjexhZach.flv

http://s164.photobucket.com/albums/u...IntZach002.flv

This guy truely does amazing work. I will have the head back in just a couple days, fully assembled with 78lb valve springs too =D.

 

lol at misunderstanding of PSI...straight up ricer logic...

PSI is a measure of RESISTANCE!

higher (would-be) trap speed, likely due to lower IAT2s

no loss in manifold pressure

if you plan on doing it be VERY, VERY careful

better to take off not enough, than too much..

 

The reason some people lose boost and the reason some gain is where the time is spent porting. The thing is the m62 is a pretty decent off the shelf blower in terms of how it does its job. If your loosing boost you probably spent more time on the outlet (less pressure) and vice versa.

 

zach are u gettin ur intake mani ported too?

 

No, I don't really see any point of porting the intake manifold until I go tvs.

 

If you are grinding down and getting rid of material there is going to more volume that the blower is pressurizing, so the pressure isn't going to be the same, just a tad less.

 

o i gotcha

 

You really don't understand how this works do you..

Because the Pressure is taken AFTER the SC, then a loss of pressure does not mean a reduction in resistance... Idiot.

It means less volume of air is entering the engine, which means less fuel can be burnt.

 

Yeah, I was a little...out of it....and realized this later, but I decided not to edit.

 

At least someone shares my logic on this..

 

"Ricer Logic" You really should check the link in my signature.


BTW: This is the first time I have ever been flamed incorrectly and a person actually fessed up to being wrong.

Kudos to you sir. Sorry for calling you an Idiot.

If you move the casing further away from the screws by polishing it, there will be more room for the air to leak back in the wrong direction and the screws will have to move faster to create the same pressure.

Similar to paddling up stream with a smaller paddle.

 

Yeah, I was highly intoxicated and ranting atm...everyone got trolled in every post I made...

There is a sweet spot for opening up the outlet, I believe Eaton has suggested somewhere around 1/8", I personally did 5/32" and noticed no pressure loss. Most people take off way too much material.