1NZ port & polish - Page 3 - Toyota Yaris Forums

Black Yaris · 03-16-2007, 06:41 AM

So what are the plans for TI for this week end..... I can't wait to hear/see that exaust... shit if I have time, and they have time, see if they can change my exaust up a bit... hit me up L8er

Galavoxx · 03-16-2007, 12:05 PM

Does anyone know if bigger valves have ever been fitted to this head? Or if it might be possible? I have no idea what the inside of the head looks like on the 1NZ but larger valves can net more gains when used in conjunction with the P&P. Just a thought.

Dragonacc · 03-16-2007, 01:00 PM

Quote:

Originally Posted by Galavoxx

Does anyone know if bigger valves have ever been fitted to this head? Or if it might be possible? I have no idea what the inside of the head looks like on the 1NZ but larger valves can net more gains when used in conjunction with the P&P. Just a thought.

Larger valves won't help unless you increase the redline or go FI. Bigger valves kill air velocity which hurts bottom end power.

Galavoxx · 03-16-2007, 03:52 PM

Quote:

Originally Posted by Dragonacc

Larger valves won't help unless you increase the redline or go FI. Bigger valves kill air velocity which hurts bottom end power.

I don't entirely agree with that. OF course a higher redline is going to showcase the potential of larger valves. However, with a flow bench designed head and larger valves, the hp should be avilable everywhere, not just up high. I'm not saying that the 1NZ has the potential to make more power with just valves and a head job but the potential of a stock internal 1NZ engine with just head work has yet to be realized. Many head jobs (good ones) will bear the ideal combination of performance, reliability, and drivability. This is done by balancing all of the head elements such as matching valve size and shape to seat geometry to port configuration. Bottom line: a head alone on many cars can conservatively net horsepower gains of 5 – 10% (and occasionally even more) and this is stage 1 on stock internals. But you probably already know this. Of course we will also have to get into the electronics...

Dragonacc · 03-16-2007, 05:57 PM

Quote:

Originally Posted by Galavoxx

I don't entirely agree with that. OF course a higher redline is going to showcase the potential of larger valves. However, with a flow bench designed head and larger valves, the hp should be avilable everywhere, not just up high. I'm not saying that the 1NZ has the potential to make more power with just valves and a head job but the potential of a stock internal 1NZ engine with just head work has yet to be realized. Many head jobs (good ones) will bear the ideal combination of performance, reliability, and drivability. This is done by balancing all of the head elements such as matching valve size and shape to seat geometry to port configuration. Bottom line: a head alone on many cars can conservatively net horsepower gains of 5 – 10% (and occasionally even more) and this is stage 1 on stock internals. But you probably already know this. Of course we will also have to get into the electronics...

It's true headwork and larger valves can gain power everywhere. But unless the stock valves are too small for the airflow requirements of the engine adding larger valves will hurt bottom end performance.

Now, I suppose the only way to really know if the valves are too small is to spend time with the heads on a flowbench and the car on a dyno.

Galavoxx · 03-16-2007, 06:08 PM

Quote:

Originally Posted by Dragonacc

Now, I suppose the only way to really know if the valves are too small is to spend time with the heads on a flowbench and the car on a dyno.

If I only had the cash. A good flowed head job alone with valves, if needed, could cost anywhere from $2 to $3 grand. At Least!!

Moose · 03-16-2007, 06:48 PM

Quote:

Originally Posted by Galavoxx

If I only had the cash. A good flowed head job alone with valves, if needed, could cost anywhere from $2 to $3 grand. At Least!!

When I had my B18 head worked (5 angle valve job, intake gasket matching, polishing and "ported as wide open as possible"), I paid $3750. The work took a week and a half.

I should add, though, that included balancing my rods and pistons, jet-hot coating the piston tops, and installing valvetrain. So, $3000 is a good figure for a good head job.

Yup, shit's expensive.

joey1320 · 03-16-2007, 08:19 PM

a good, reputable shop should know how to clean a head for better flow-no matter what name is on the hood of the car. now if it's a small shop with not much knowledege, trying to get into a new market then i might be worry about it.

they should definitely bench flow it to see the before and after and you should be there to see the difference. you don't wanna get the car back together to figure out they messed up big. good luck!

mikeukrainetz · 03-16-2007, 09:49 PM

listening to all this amazes me, im really not used to the import engine build and the lengths people will go to for 5 - 10hp. what I am used to is gaining 60hp with an aftermarket set of heads for a small block. It seems like theres maybe one or two here who actually know whats involved in a P&P job. Its not one of those DIY on the weekend kind of things. Most people, even shops who arent familiar with certain types or model variations of heads can ruin a 1k set of heads by removing too much material. people also think they can just hog out material to the max and expect huge gains in flow. Ive seen heads so thin they literally cant hold water. Overheating winds up being a problem and cracking around valve stems. The only way I can see this being a justifiable expense is if the bottom end is built and your boosting. I wouldnt worry about valve size either.
Are you guys actually serious of doing this to this engine? If so go with the advice of a good shop with a flow bench.
Just because the heads flow better wont net you much without opening everything else up.

ChinoCharles · 03-16-2007, 10:55 PM

Listen. You guys don't know Ohio.

Summit Racing... if I'm not mistaken, one of the largest domestic parts distributors in the country... and one of the largest distributors overall. They have everything. Their warehouse is HUGE. you can walk in on any day and leave with anything from crate engines to the little condom that goes on your LED. There are also a few tracks around here... a few.

So, I live in what is basically the best 50 square miles to build a domestic muscle car. There are 18 year old kids where I live that can tell you how to put 550 to the rear in a Nova.

I drive a Yaris.

Somehow I have an intake in my car that people are drooling for. And these domestic guys can manufacture MAF plates. And I can buy the rest at... you guessed it.

I'm on here so much I could almost tell you anything about this specific car. If not, I'm on here asking you guys within 12 hours. This is my finest resource, and the main reason isn't necessarily because of the advice. Its the vendors. If you want people who won't bullshit you on cars, talk to someone who deals with them every single day.

Yadda yadda yadda... now I'm sitting here with a car that looks 5 steps short of sex, I have a dyno and tuner to play with and I have a P&P sitting in my fucking lap.

In the heart of domestic country, there is a Yaris getting attention. This is easily the funniest shit I've ever done in my life. There is a LOT of pulling up and just having a good laugh.

Now, I'm at a point where I'm staring something in the face and I don't know if I can take the next step. I could possibly get this done, continue trying to tune this car and get lucky. If it takes hold, I now have a successful P&P sponsorship in my pocket... and I have an intake on the market. My goal from day one has been to just try and bring attention to it. Now I'm possibly holding the Yaris with the most interesting story in the country... and in debt 10 grand in a warranty-void car. Lets hope the poor bastard sells some intakes.

Flipside... I blow my car up and I'm fucked for life. You guys do such a wonderful job of reminding me of this, I couldn't thank you enough.

The question is do I trust these domestic shops to play with a 1NZ. Keep in mind I have Baskin as my main guide, and I have literally never seen a problem he couldn't fix. Granted, there is no way to fix an overported head.

Now tell me what you'd do.

Black Yaris · 03-16-2007, 10:59 PM

Chino... is our head the same as a XA, XB or Echo? If so.... I am sure I can get you those all day long if there is a fuck up

ChinoCharles · 03-16-2007, 11:04 PM

I'd assume so... same engine, similar HP specs. Guys?

Dragonacc · 03-16-2007, 11:04 PM

Quote:

Originally Posted by mikeukrainetz

lIts not one of those DIY on the weekend kind of things. Most people, even shops who arent familiar with certain types or model variations of heads can ruin a 1k set of heads by removing too much material.

Depends on the heads. I can port a set of E7 heads for a SBF and they'll make quite a bit more power than stock.

Import cars can cost a bunch to get power out of, but when done properly they make serious power. Just look at some of the 800 hp B series turbo engines out there.

Dragonacc · 03-16-2007, 11:07 PM

Chino, your part of Ohio sounds like where I live. We have a Summit here too, and several really really good engine/machine shops. Atlanta Motor Speedway, Road Atlanta up north etc. etc.

I wish you the best of luck with your endeavors in 1NZ power production.

Black Yaris · 03-16-2007, 11:33 PM

Quote:

Originally Posted by Dragonacc

Chino, your part of Ohio sounds like where I live. We have a Summit here too, and several really really good engine/machine shops. Atlanta Motor Speedway, Road Atlanta up north etc. etc.

I wish you the best of luck with your endeavors in 1NZ power production.

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

Dragonacc · 03-17-2007, 11:27 AM

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, 01:19 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, 01:29 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.

03-16-2007, 09:49 PM	#45
mikeukrainetz View User's Garage Drives: 2006 Toyota Yaris Join Date: May 2006 Location: Canada Posts: 564	listening to all this amazes me, im really not used to the import engine build and the lengths people will go to for 5 - 10hp. what I am used to is gaining 60hp with an aftermarket set of heads for a small block. It seems like theres maybe one or two here who actually know whats involved in a P&P job. Its not one of those DIY on the weekend kind of things. Most people, even shops who arent familiar with certain types or model variations of heads can ruin a 1k set of heads by removing too much material. people also think they can just hog out material to the max and expect huge gains in flow. Ive seen heads so thin they literally cant hold water. Overheating winds up being a problem and cracking around valve stems. The only way I can see this being a justifiable expense is if the bottom end is built and your boosting. I wouldnt worry about valve size either. Are you guys actually serious of doing this to this engine? If so go with the advice of a good shop with a flow bench. Just because the heads flow better wont net you much without opening everything else up. __________________ http://www.cardomain.com/ride/2336679

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03-16-2007, 06:41 AM	#37
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	So what are the plans for TI for this week end..... I can't wait to hear/see that exaust... shit if I have time, and they have time, see if they can change my exaust up a bit... hit me up L8er

03-16-2007, 12:05 PM	#38
Galavoxx View User's Garage Drives: Yaris Hatch Join Date: Oct 2006 Location: San Francisco Posts: 397	Does anyone know if bigger valves have ever been fitted to this head? Or if it might be possible? I have no idea what the inside of the head looks like on the 1NZ but larger valves can net more gains when used in conjunction with the P&P. Just a thought.

03-16-2007, 08:19 PM	#44
joey1320 View User's Garage Drives: Yaris LB Join Date: Mar 2007 Location: Lakewood, Ohio Posts: 538	a good, reputable shop should know how to clean a head for better flow-no matter what name is on the hood of the car. now if it's a small shop with not much knowledege, trying to get into a new market then i might be worry about it. they should definitely bench flow it to see the before and after and you should be there to see the difference. you don't wanna get the car back together to figure out they messed up big. good luck!

03-16-2007, 10:55 PM	#46
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	Listen. You guys don't know Ohio. Summit Racing... if I'm not mistaken, one of the largest domestic parts distributors in the country... and one of the largest distributors overall. They have everything. Their warehouse is HUGE. you can walk in on any day and leave with anything from crate engines to the little condom that goes on your LED. There are also a few tracks around here... a few. So, I live in what is basically the best 50 square miles to build a domestic muscle car. There are 18 year old kids where I live that can tell you how to put 550 to the rear in a Nova. I drive a Yaris. Somehow I have an intake in my car that people are drooling for. And these domestic guys can manufacture MAF plates. And I can buy the rest at... you guessed it. I'm on here so much I could almost tell you anything about this specific car. If not, I'm on here asking you guys within 12 hours. This is my finest resource, and the main reason isn't necessarily because of the advice. Its the vendors. If you want people who won't bullshit you on cars, talk to someone who deals with them every single day. Yadda yadda yadda... now I'm sitting here with a car that looks 5 steps short of sex, I have a dyno and tuner to play with and I have a P&P sitting in my fucking lap. In the heart of domestic country, there is a Yaris getting attention. This is easily the funniest shit I've ever done in my life. There is a LOT of pulling up and just having a good laugh. Now, I'm at a point where I'm staring something in the face and I don't know if I can take the next step. I could possibly get this done, continue trying to tune this car and get lucky. If it takes hold, I now have a successful P&P sponsorship in my pocket... and I have an intake on the market. My goal from day one has been to just try and bring attention to it. Now I'm possibly holding the Yaris with the most interesting story in the country... and in debt 10 grand in a warranty-void car. Lets hope the poor bastard sells some intakes. Flipside... I blow my car up and I'm fucked for life. You guys do such a wonderful job of reminding me of this, I couldn't thank you enough. The question is do I trust these domestic shops to play with a 1NZ. Keep in mind I have Baskin as my main guide, and I have literally never seen a problem he couldn't fix. Granted, there is no way to fix an overported head. Now tell me what you'd do.

03-16-2007, 10:59 PM	#47
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	Chino... is our head the same as a XA, XB or Echo? If so.... I am sure I can get you those all day long if there is a fuck up

03-16-2007, 11:04 PM	#48
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	I'd assume so... same engine, similar HP specs. Guys?

03-16-2007, 11:07 PM	#50
Dragonacc View User's Garage Drives: 07 Yaris LB, 70 Mach 1, 84 5.0 Join Date: Feb 2007 Location: Atl, GA Posts: 139	Chino, your part of Ohio sounds like where I live. We have a Summit here too, and several really really good engine/machine shops. Atlanta Motor Speedway, Road Atlanta up north etc. etc. I wish you the best of luck with your endeavors in 1NZ power production.

03-17-2007, 01:19 PM	#53
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, 01:29 PM	#54
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.