is there a way to tell if a motor is ported or not without opening it up? (motor is in car). Just curious. Thanks.

Danny

 

floor it in second gear...and run through third gear...a non ported motor will have peak power end around 6500 rpms...it will not pull and pull and pull and pull all the way thru the power band. non ported motors are also more responsive on the low end...


my ported motor feels like i could pull all the way thru 9k rpms...it doesnt feel like i should have to shift in terms of power range...the stock motor tails off at higher rpms and you can literally feel it.


j

 

thanks, so i see the best way is to go on a dyno and check how the power band looks.

Danny

 

I completely agree.

 

Also vacuum readings:

* Normal stock motor will show 18" or better.
* Mildly ported motors show 14"-16".
* Heavily ported motors can go down to 10"-12".

 

depending on the size of the port job you can really hear it at idle. Non ported just hums, while a ported motor sounds awesome... it kind of pulsates. At high RPMs it feels like another turbo kicks in around 6700 rpm

 

does it pass smog? Most ported motors(if any) will not pass smog

 

I second that....

 

hmmmmmmmmmmmm. . . . this is all very interesting. before i tore my car down my car read around 12 on the vacuum. it also pulled well passed 6500. due if i have a ported motor in mine. . . . . im gonna **** my pants!!!!!!! that would be crazy. haha. i didnt think you could tell the diff. like that. my car has been far from stock for a while though. does the pfc mess up the vacuum readings at all? man, if i have ported motor im gonna . . . . FREAK OUT!!!!!!!!

paul

 

Wow ... you're gonna FREAK OUT!!!??? I guess then you can add that to your long, drawn-out, mind-numbing signature.

Mike is right, you can hear it. I can hear mine seemingly miles away and it doesn't sound like a gas weedeater, but I certainly don't FREAK OUT!!! The vacuum reading can also be a good indication if everything else is healthy and you don't know what you're listening for.

 

with the idle pulsating thing. Does it sound kinda liek an american car? like it's kinda a rumble...kinda like how a viper sounds at idle. Just curious.

Danny

 

Yeah it can, a lot depends on the exhaust and the turbo(s)/manifold as far as the pitch goes, but it'll sound a bit more open and will thump a bit at idle. Mine basically sounds like you want absolutely nothing to do with it no matter what you drive, which is great by me because I don't like idiots in cars. It does attract attention, which sucks.

 

*tears out his hair and TOTALLY FREAKS OUT!!* waaaaaaaaaaaaaaaaaaaaaaaaaaaaa UI HATE LIFE!!! AAAAAAAAAAAAH!!!

Mine sounds like a 'brup brup brup brup brup brrr brup brup brup" ph3@r my pantomiming skillz. I get 14hg of vacuum on my car

 

the powerband drop is not completely related to the porting of the engine... if a ported engine with very restrictive turbo, it is not likely going to pull hard on the top end....

also, not all ported motor have smog problem.. its all depends on how much overlap is induced to the port... when there is more overlap, the exhaust gas deludes the intake charge, thus causes unclean mixture, and makes the blab-blab sound

 

my signature isnt that long man!!!!!!!!!!!!!!!! ive seen longer, so nyaaaaaaaaaahh. ill re-write it so that it suits your grammaticall needs. hehe. i think i spelled that wrong.

paul

how about this\/\/\/\/\/\/\/\/\/\/\/