Porting and other mods for the day - Hyundai Performance Forums

Caramanos2000 · 10-27-2006, 11:22 AM

I was thinking of doing some mods today. First have the exhaust resonator removed. Then, port the intake manifold and throttle body. These things worth it?

berrjona · 10-28-2006, 07:52 AM

exhaust resonator removal... will make the exhaust really loud..

and throttle body and intake manifold you wont notice any difference in performance at all even switching to a BBTB barely if not even noticeable

draccent · 10-28-2006, 02:20 PM

I have to disagree here.. particularly with the accent manifolds which are cheaply cast aluminum. polishing and port matching the manifold to the head makes a difference due to the turbulence made by the rough spots in the stock manifold. Definetly more noticeable with F/I. Havent done this myself but thats what Ive found. But its only maybe a 10/15 percent gain which on our engines is maybe ten horsepower. after sending that through engine, tranny and road yes its more on the lines of 5-7 whp. more of something you do as an addendum to further mods. Unless its a chevy 350 with uber torque and hp to begin with

Caramanos2000 · 10-28-2006, 03:18 PM

I got that pesky res cut off. NICE!!!! I get satisfying pops when I let off the gas. Any ideas on how hawrd it is to polish the intale manifold and throttle body. Any DIY? The throttle body is just a matter of taking the lip off and reducing the butterfly valve actuator? Also, can I just bold up an elantra TB rather than porting my current one?

berrjona · 10-28-2006, 09:23 PM

Quote:

Originally Posted by draccent

I have to disagree here.. particularly with the accent manifolds which are cheaply cast aluminum. polishing and port matching the manifold to the head makes a difference due to the turbulence made by the rough spots in the stock manifold. Definetly more noticeable with F/I. Havent done this myself but thats what Ive found. But its only maybe a 10/15 percent gain which on our engines is maybe ten horsepower. after sending that through engine, tranny and road yes its more on the lines of 5-7 whp. more of something you do as an addendum to further mods. Unless its a chevy 350 with uber torque and hp to begin with

HAHAHAHAHAHAHAAHA the internals of the manifold arent that bad, and by porting and polishing it your not going to be allowing more air into the engine just making it a little more efficient..... you need to port and polish the head.... that is where the gains are.... 10 - 15% gains.... thats being optimistic isnt it? you dont even gain that much from changing a full exhaust system.... porting the stock intake manifold and TB with doing nothing else you would be lucky to see 2-3% gains

Dont forget to do the coolant bypass thats a serious performance mod Yo

newbtastic · 10-28-2006, 11:54 PM

the coolant bypass? thats taking the two hoses from the tb and connecting them? how much gains? is it really a good mod?

berrjona · 10-29-2006, 01:27 AM

Yeah its getting rid of one of the hoses and just looping the other

well accoridng to some poeple on this forum its a good mod to do and they have apparently noticed a gain

its totaly BS the throttle body might be a touch cooler but you wont notice any performance gain from doing it.

newbtastic · 10-29-2006, 01:30 AM

oh, i see. you were making fun... hhaahaha well im a nooby at this stuff so i gotta ask.

alex01tib · 10-29-2006, 01:46 AM

berrjona no offense but you seem like a pessimist, by that i mean that it seems like you dont think something is worth it if its not a huge gain.

sure P/P manifold and BBTB might not feel like a 50 shot of nitrous, but if your truely in tune with your car you will feel a gain, and will appreciate it.

If a mod shaves a tenth of a second or so off your quarter chances are you wouldnt feel it at all. But put 3-4 of those mods together and were talking
a respectable gain, maybe half a second if youve done the right ones and can drive.

And about the tb coolant lines, when your engine is warm, you have more than 150 degree coolant heating up your throttle body, which may not heat up the air like a turbo, but whats the sense in a CAI if youve got a heating element upstream of your "Cold Air Intake"

It may not give you 25 whp, but it doesnt take any whp away either. And its free, so why not.

Oh and your question about the elantra tb i do believe the bolt holes are too far apart for your IM.

draccent · 10-29-2006, 12:53 PM

Quote:

Originally Posted by berrjona

HAHAHAHAHAHAHAAHA the internals of the manifold arent that bad, and by porting and polishing it your not going to be allowing more air into the engine just making it a little more efficient..... you need to port and polish the head.... that is where the gains are.... 10 - 15% gains.... thats being optimistic isnt it? you dont even gain that much from changing a full exhaust system.... porting the stock intake manifold and TB with doing nothing else you would be lucky to see 2-3% gains

Dont forget to do the coolant bypass thats a serious performance mod Yo

from the research I have done I have read that this makes a difference, and it dosen't take much of a "bur" in there at all to make the difference. True the manifold isn't that bad but it could be better. Though I have not checked for the Accent the runners are probably just a hair smaller than than the hole in the head. This creates turbulence and hurts efficency. And it wont make you car bawl like a camaro SS or something but every little bit counts. Read about Nascar cars, they get those engines up to so much power through a collection of mods some very subtle and some more dramatic. Thats my op.