1NZ port & polish - Page 4 - Toyota Yaris Forums

Dragonacc · 03-17-2007, 12:27 PM

Quote:

Originally Posted by Black Yaris

I am in Ohio and used to live in Atlanta and Atlanta is WAY better, come on you have a NOPI store in forest park, and tuner shops all over the place. But there is NO comparison with machine shops, I bet there are more machine shops here in Toledo than there are McDonalds and Taco Bell's together... no shit.... but I still wish I was back in the ATL.... I hate the cold

Heh, you only need one good machine shop to get a job done.

Most of my family lives in MI, the cold does suck...

jdubau55 · 03-17-2007, 02:19 PM

Why not research the part#'s on the 1NZ head? You could prolly pick one off an Echo for next to nothing then use that one as a prototype.

ChinoCharles · 03-17-2007, 02:29 PM

I just found my head. $150-300 depending on mileage.

This is getting done, but I have to sell some shit first. The money tree is quickly going bare.

If anyone wants a Megan Racing muffler, PM me.

Black Yaris · 03-17-2007, 02:50 PM

Poorboy, you joining us out at Chino's this weekend as well?

ChinoCharles · 03-17-2007, 02:54 PM

This shits getting deep. Should I buy a keg?

Black Yaris · 03-17-2007, 03:01 PM

Quote:

Originally Posted by ChinoCharles

This shits getting deep. Should I buy a keg?

Fuck the keg, don't you gotta key to the country club?

Galavoxx · 03-17-2007, 02:54 PM

I agree with Black Yaris. You can get xA, xB, and echo heads all day. I can't speak to whether or not it's the same exact head but if those heads will bolt up and have the same valve size, or you even want to go with bigger valves, I say get one. You wont have be without your car while the work is done and the shop wont feel rushed to get the thing back to you. They can "spend some time with it", run their fingers through it's openings, probe it, make it flow, whatever has to be done to get it right.

If they do fuck up, which is unlikely since your guy sounds like a pro, then you wont have to wait to get your car back while you source another head. Just toss your new head on once the P&P is done. Your car wont be out of service for more than a few hours. And when your new head works and makes 15 or 20hp, you pay to have your extra head P&P'd and sell it to me at a discounted price.

Seriously though, if I had this opportunity, I would snatch it up in a second.

ChinoCharles · 03-17-2007, 03:02 PM

Hell no. They know better than that!

Black Yaris · 03-17-2007, 03:06 PM

Back on topic... I will get Head for everyone... a 1NZ head that is Echo, XA, XB all day from car-part.com... plus I have some other hookups on getting complete drivetrains. Since Toyota's never blowup these drivetrains are CHEEP, I think I could get us a whole damn car stuffed in the rear for under a grand (including shipping, taxes, BS fees)

ChinoCharles · 03-17-2007, 03:11 PM

Quote:

I will get Head for everyone

Glad you didn't say give.

That is a very interesting idea. What is that 6 speed going for on there?

Black Yaris · 03-17-2007, 03:12 PM

http://www.yarisworld.com/forums/showthread.php?t=4386

jt258 · 02-07-2009, 05:22 PM

if you want something to make the 1nz go a bit faster try bullfrog (gude performance) they make cams and valvesprings for the 1nz-fe engine Im thinking about getting this equipment for my car.

Kaotic Lazagna · 02-08-2009, 12:50 AM

oh man, this thread is almost 2-years old. LOL.

ka0sx · 02-08-2009, 03:15 AM

I didnt bother reading all the posts between page one to here.

so anyways here it goes.

Porting, matching the diameter of the intake and exhaust ports to the same size as the manifold ports.
Porting/polishing the intake is not good for the term of gas mileage as the porous edges in the intake ports from the sand mold in the casting process provides terbulance that helps atomize the fuel. Doing the intake might yield a marginal increase in horsepower as will cram a bit more air in from the smother flow.

Exhaust matching can be helpful in getting rid of gasses, but this is virtualy useless and you will lose your back pressure vortex and lose some fuel economy as you will get more through draft on the valve overlap.

Performance wise, if you do both intake and exhaust you might yield about 2-8% gain in horsepower depending on the engine, Im not sure how the 1nz would fair as i have never had one apart to see the over laps and how rough the ports are.

However port and polishing IS BEST on boosted engines where pure performance is in mind, It will maximize potential flow in to the engine, and the exhaust port will help quickly vent out the increased surge of gas.

Moose,

also would like to add that increasing valve seat angles decreases longevity of the seat as there is less contact point when the spring snaps the valve back at higher rpm.

jkt_lovely · 02-11-2009, 12:18 PM

I've done Port and Polish + 3 angle Valve Job on my Yaris....
DEFINITELY didnt lose any low end...
Felt more starting 2.5K rpm onwards....

Reason for doing it: Labor is cheap over here... unlike USA... cost only around $250...
and its WAY more feel - able than Muffler... Intake... bla bla bla...

Tamago · 02-11-2009, 12:41 PM

Quote:

Originally Posted by jkt_lovely

I've done Port and Polish + 3 angle Valve Job on my Yaris....
DEFINITELY didnt lose any low end...
Felt more starting 2.5K rpm onwards....

Reason for doing it: Labor is cheap over here... unlike USA... cost only around $250...
and its WAY more feel - able than Muffler... Intake... bla bla bla...

do you know Alexander Rungkat?

turboecho2005 · 02-12-2009, 09:33 PM

The 1NZ (and 1ZZ and 2ZZ for that matter) have far to big of a stroke.... you need a more square bore and stroke.

destroke the 1NZ with custom rods and pistons and offset grind on the crank and shave a bit of the top of the block off ;)

Then you can make some serious power but you'll also lose a bit of displacement. But well worth it for the performance gain. But not worth it in the wallet.

ChinoCharles · 02-12-2009, 11:56 PM

I still know this guy, and we still talk about doing it. Went shooting with him last week.

Maybe one day?

02-12-2009, 09:33 PM	#17
turboecho2005 Drives: 2005 Toyota Echo Join Date: Oct 2008 Location: Ottawa, Ontario Posts: 177	The 1NZ (and 1ZZ and 2ZZ for that matter) have far to big of a stroke.... you need a more square bore and stroke. destroke the 1NZ with custom rods and pistons and offset grind on the crank and shave a bit of the top of the block off ;) Then you can make some serious power but you'll also lose a bit of displacement. But well worth it for the performance gain. But not worth it in the wallet. __________________ Project Slowtop - Twin Engine 4AGE Blacktop Vitz - Twin Turbo - 503hp 1987 Nissan Maxima - 40,000 original miles - Slammed 1991 Isuzu Impulse RS AWD Turbo - approx 250hp - Winter Beater 1989 Isuzu Imark RS - Mint Condition - 0 rust - 100% factory :) - Summer Cruiser - 100% restored 1986 VW Jetta Wolfsburg - 120,000km - Mint condition. TDI swap in progress

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03-17-2007, 02:19 PM	#2
jdubau55 Drives: 2007 White Yaris LB 5 Spd. Join Date: Feb 2007 Location: Blacksburg, VA Posts: 451	Why not research the part#'s on the 1NZ head? You could prolly pick one off an Echo for next to nothing then use that one as a prototype.

03-17-2007, 02:29 PM	#3
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	I just found my head. $150-300 depending on mileage. This is getting done, but I have to sell some shit first. The money tree is quickly going bare. If anyone wants a Megan Racing muffler, PM me.

03-17-2007, 02:50 PM	#4
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	Poorboy, you joining us out at Chino's this weekend as well?

03-17-2007, 02:54 PM	#5
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	This shits getting deep. Should I buy a keg?

03-17-2007, 02:54 PM	#7
Galavoxx View User's Garage Drives: Yaris Hatch Join Date: Oct 2006 Location: San Francisco Posts: 397	I agree with Black Yaris. You can get xA, xB, and echo heads all day. I can't speak to whether or not it's the same exact head but if those heads will bolt up and have the same valve size, or you even want to go with bigger valves, I say get one. You wont have be without your car while the work is done and the shop wont feel rushed to get the thing back to you. They can "spend some time with it", run their fingers through it's openings, probe it, make it flow, whatever has to be done to get it right. If they do fuck up, which is unlikely since your guy sounds like a pro, then you wont have to wait to get your car back while you source another head. Just toss your new head on once the P&P is done. Your car wont be out of service for more than a few hours. And when your new head works and makes 15 or 20hp, you pay to have your extra head P&P'd and sell it to me at a discounted price. Seriously though, if I had this opportunity, I would snatch it up in a second.

03-17-2007, 03:02 PM	#8
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	Hell no. They know better than that!

03-17-2007, 03:06 PM	#9
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	Back on topic... I will get Head for everyone... a 1NZ head that is Echo, XA, XB all day from car-part.com... plus I have some other hookups on getting complete drivetrains. Since Toyota's never blowup these drivetrains are CHEEP, I think I could get us a whole damn car stuffed in the rear for under a grand (including shipping, taxes, BS fees)

03-17-2007, 03:12 PM	#11
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	http://www.yarisworld.com/forums/showthread.php?t=4386

02-07-2009, 05:22 PM	#12
jt258 View User's Garage Drives: 10' corolla ce Join Date: Oct 2008 Location: HOUSTON Posts: 106	if you want something to make the 1nz go a bit faster try bullfrog (gude performance) they make cams and valvesprings for the 1nz-fe engine Im thinking about getting this equipment for my car.

02-08-2009, 12:50 AM	#13
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	oh man, this thread is almost 2-years old. LOL.

02-08-2009, 03:15 AM	#14
ka0sx Drives: bone f*ing stock Join Date: Dec 2008 Location: CA east bay Posts: 234	I didnt bother reading all the posts between page one to here. so anyways here it goes. Porting, matching the diameter of the intake and exhaust ports to the same size as the manifold ports. Porting/polishing the intake is not good for the term of gas mileage as the porous edges in the intake ports from the sand mold in the casting process provides terbulance that helps atomize the fuel. Doing the intake might yield a marginal increase in horsepower as will cram a bit more air in from the smother flow. Exhaust matching can be helpful in getting rid of gasses, but this is virtualy useless and you will lose your back pressure vortex and lose some fuel economy as you will get more through draft on the valve overlap. Performance wise, if you do both intake and exhaust you might yield about 2-8% gain in horsepower depending on the engine, Im not sure how the 1nz would fair as i have never had one apart to see the over laps and how rough the ports are. However port and polishing IS BEST on boosted engines where pure performance is in mind, It will maximize potential flow in to the engine, and the exhaust port will help quickly vent out the increased surge of gas. Moose, also would like to add that increasing valve seat angles decreases longevity of the seat as there is less contact point when the spring snaps the valve back at higher rpm.

02-11-2009, 12:18 PM	#15
jkt_lovely I've made a post! Drives: Yaris S Limited Join Date: Feb 2009 Location: Indonesia Posts: 1	I've done Port and Polish + 3 angle Valve Job on my Yaris.... DEFINITELY didnt lose any low end... Felt more starting 2.5K rpm onwards.... Reason for doing it: Labor is cheap over here... unlike USA... cost only around $250... and its WAY more feel - able than Muffler... Intake... bla bla bla...

02-12-2009, 11:56 PM	#18
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	I still know this guy, and we still talk about doing it. Went shooting with him last week. Maybe one day?