Renesis Porting Pictures + Turbo Engine Build
01-16-2012, 11:50 PM
#1
Rebuilds anyone?
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Renesis Porting Pictures + Turbo Engine Build
Figured I'd share some pics of an engine I'm porting and building for a customer.
There are very very very few decent pictures of porting done to a Renesis, not sure why....maybe its some sort of trade secret. meh.
Porting shouldnt be a secret, in the end it all comes down to having a steady hand and knowing how to control a die grinder. Some people can do it and others can't.
I'm using a Racing Beat Template. The templates come with cutaway shots of the ports which shows you how close the water jacket is to the factory cast ports. The overall final port shape is hardly changed, most of the porting is done in the intake runners where there is no templates. Its all done by eye.
First off I'll show you the engine teardown, this engine has been turbo'ed for the last 2 years I believe and it made around 290whp
Check out all the carbon in the intake ports and how the rotors are just coated.
Nasty
So heres where the magic happens. This is the Primary port at an angle, notice the fat lip on the inside edge of the port (right along the edge of the oil control ring path) Its pretty much a wall and doesn't blend very well with the intake runner.
Heres a nice shot comapring ported on the left and stock on the right, the lip is now blended nicely into the runner and is cut back on an angle to allow flow into the combustion chamber as opposed to directing the air straight up.
Nicely blended primary port and slightly larger intake runner
New bearings pressed into place, yes please!
The aux port only gets a slight chamfer to flow that air at high RPM. It is matched to the 6 port sleeve as well.
The secondary port sees no change in its port shape, just blending in the intake runner with the "bowl" of the port to flow nicely. I open up the intake runner slightly as always too.
Not much happens with the exhaust ports, the Racing Beat template opens them up earlier by camfering the opening edge slightly. I polish the exhaust ports to a very smooth finish and cut back the inside edge slightly so the exhaust doesn't have such a "corner" to go around
Ooooo NRS 1 piece apex seals....
Thats all for today, lots of seal clearancing ahead of me this week then assembly time!
There are very very very few decent pictures of porting done to a Renesis, not sure why....maybe its some sort of trade secret. meh.
Porting shouldnt be a secret, in the end it all comes down to having a steady hand and knowing how to control a die grinder. Some people can do it and others can't.
I'm using a Racing Beat Template. The templates come with cutaway shots of the ports which shows you how close the water jacket is to the factory cast ports. The overall final port shape is hardly changed, most of the porting is done in the intake runners where there is no templates. Its all done by eye.
First off I'll show you the engine teardown, this engine has been turbo'ed for the last 2 years I believe and it made around 290whp
Check out all the carbon in the intake ports and how the rotors are just coated.
Nasty
So heres where the magic happens. This is the Primary port at an angle, notice the fat lip on the inside edge of the port (right along the edge of the oil control ring path) Its pretty much a wall and doesn't blend very well with the intake runner.
Heres a nice shot comapring ported on the left and stock on the right, the lip is now blended nicely into the runner and is cut back on an angle to allow flow into the combustion chamber as opposed to directing the air straight up.
Nicely blended primary port and slightly larger intake runner
New bearings pressed into place, yes please!
The aux port only gets a slight chamfer to flow that air at high RPM. It is matched to the 6 port sleeve as well.
The secondary port sees no change in its port shape, just blending in the intake runner with the "bowl" of the port to flow nicely. I open up the intake runner slightly as always too.
Not much happens with the exhaust ports, the Racing Beat template opens them up earlier by camfering the opening edge slightly. I polish the exhaust ports to a very smooth finish and cut back the inside edge slightly so the exhaust doesn't have such a "corner" to go around
Ooooo NRS 1 piece apex seals....
Thats all for today, lots of seal clearancing ahead of me this week then assembly time!
01-17-2012, 12:18 AM
#5
Rebuilds anyone?
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Oh boosted for sure, same setup he had before. Its the Greddy kit with the 3071 compressor I believe. I didn't build the car originally, he brought it to me to have the motor built and ported.
01-17-2012, 12:43 AM
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Nice pics Joe!
This is my car. Here's the dyno before the rebuild(with a temporary map and a leaking on the turbo inlet coupler).
Will boost it up to 13-16PSI, hope it can put down 360-400whp
This is my car. Here's the dyno before the rebuild(with a temporary map and a leaking on the turbo inlet coupler).
Will boost it up to 13-16PSI, hope it can put down 360-400whp
01-20-2012, 06:35 AM
#12
Rebuilds anyone?
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Assembled the engine last night and got the turbo and manifold wrapped. Also firesleeved the coolant hoses for added protection.
Last edited by R.P.M.; 01-20-2012 at 11:56 AM.
01-20-2012, 06:53 AM
#13
nice pictures. Rb's template isn't too aggressive but it's extremely easy to follow.
There's an ugly thing going on there though. Old housings with new ceramic seals...
There's an ugly thing going on there though. Old housings with new ceramic seals...
01-20-2012, 08:04 AM
#15
Sweet!
I'm really happy to see this, a local guy that can do porting and a engine rebuild.
So do you have any input on how to reduce the carbon build up in the Intake Ports?
Seafoam?
Meth?
Scoobie Snacks?
What's the best way to get a hold of you? PM, Email, Phone?
--edit---
I'm assuming you will do this job for other people
I'm really happy to see this, a local guy that can do porting and a engine rebuild.
So do you have any input on how to reduce the carbon build up in the Intake Ports?
Seafoam?
Meth?
Scoobie Snacks?
What's the best way to get a hold of you? PM, Email, Phone?
--edit---
I'm assuming you will do this job for other people
01-20-2012, 09:00 AM
#17
01-20-2012, 09:48 AM
#18
The same point i'd make if somebody put diesel in our tank...
Used housings and new ceramic seals don't seal very well together. I don't have much first hand experience on seal wear but i would list it as a concern too. New or even lapped housings should be the way to go.
Used housings and new ceramic seals don't seal very well together. I don't have much first hand experience on seal wear but i would list it as a concern too. New or even lapped housings should be the way to go.
01-20-2012, 10:12 AM
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This a great thread, very interesting. How much extra HP do you think will come from porting? Impact on torque? Does porting have any impact on engine life?
01-20-2012, 11:31 AM
#21
Like I said, contact Sven at NRS about that. Do you suppose the guy who manufactures the seals being used in this engine knows something about the issue you speak of and, perhaps, his opinion (likely based on actual experience) differs from what the "consensus" is?
My guess is that between Joe's build here and the two more NRS-sealed engines I am going to be building over the next few weeks everyone will have a few presumptions challenged as regards the function and performance of one-piece ceramic apex seals.
(Joe, please accept my apology for having barged in your thread)
My guess is that between Joe's build here and the two more NRS-sealed engines I am going to be building over the next few weeks everyone will have a few presumptions challenged as regards the function and performance of one-piece ceramic apex seals.
(Joe, please accept my apology for having barged in your thread)
Anyway I apologize with the OP for the uncalled for threadjack and to you since you're the guy I owe much if not most of my knowledge to.
01-20-2012, 11:32 AM
#22
Rebuilds anyone?
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Holy Multi quote
How is the Racing Beat Template not aggressive? Lets see pictures of your aggressive porting!
I also have no idea where you came up with this "Ceramic seals on old housings are the devil" idea. Sven, you know the guy that makes NRS seals, uses them on his own personal car with used housings.....he's posted here on this forum about it several times I believe.
I think its a 3071 compressor housing, maybe shaojie1984 can post up the turbo specs.
From experience with turbo RX-7's, meth/water injection is a very good way to keep the carbon from building up inside the engine. Scoobie Snacks are a possibility....
Feel free to email me if you like info on porting or engine building joe_ferg@live dot com
I have a full time job, so playing with Rotaries is a part time thing, evenings/weekends.
You frighten me
No worries Charles, good to see other builders share similar views on this sort of subject.
Scott!! Its been a while! Not really sure what the end HP gain will be. I'm building a N/A engine for Modified Magazine which I am also porting. That should show us a good before and after HP gain on an N/A Renesis.
I also have no idea where you came up with this "Ceramic seals on old housings are the devil" idea. Sven, you know the guy that makes NRS seals, uses them on his own personal car with used housings.....he's posted here on this forum about it several times I believe.
I think its a 3071 compressor housing, maybe shaojie1984 can post up the turbo specs.
Sweet!
I'm really happy to see this, a local guy that can do porting and a engine rebuild.
So do you have any input on how to reduce the carbon build up in the Intake Ports?
Seafoam?
Meth?
Scoobie Snacks?
What's the best way to get a hold of you? PM, Email, Phone?
--edit---
I'm assuming you will do this job for other people
I'm really happy to see this, a local guy that can do porting and a engine rebuild.
So do you have any input on how to reduce the carbon build up in the Intake Ports?
Seafoam?
Meth?
Scoobie Snacks?
What's the best way to get a hold of you? PM, Email, Phone?
--edit---
I'm assuming you will do this job for other people
Feel free to email me if you like info on porting or engine building joe_ferg@live dot com
I have a full time job, so playing with Rotaries is a part time thing, evenings/weekends.
Like I said, contact Sven at NRS about that. Do you suppose the guy who manufactures the seals being used in this engine knows something about the issue you speak of and, perhaps, his opinion (likely based on actual experience) differs from what the "consensus" is?
My guess is that between Joe's build here and the two more NRS-sealed engines I am going to be building over the next few weeks everyone will have a few presumptions challenged as regards the function and performance of one-piece ceramic apex seals.
(Joe, please accept my apology for having barged in your thread)
My guess is that between Joe's build here and the two more NRS-sealed engines I am going to be building over the next few weeks everyone will have a few presumptions challenged as regards the function and performance of one-piece ceramic apex seals.
(Joe, please accept my apology for having barged in your thread)
Scott!! Its been a while! Not really sure what the end HP gain will be. I'm building a N/A engine for Modified Magazine which I am also porting. That should show us a good before and after HP gain on an N/A Renesis.
Last edited by R.P.M.; 01-20-2012 at 11:59 AM.
01-20-2012, 12:33 PM
#23
Holy Multi quote
How is the Racing Beat Template not aggressive? Lets see pictures of your aggressive porting!
I also have no idea where you came up with this "Ceramic seals on old housings are the devil" idea. Sven, you know the guy that makes NRS seals, uses them on his own personal car with used housings.....he's posted here on this forum about it several times I believe.
How is the Racing Beat Template not aggressive? Lets see pictures of your aggressive porting!
I also have no idea where you came up with this "Ceramic seals on old housings are the devil" idea. Sven, you know the guy that makes NRS seals, uses them on his own personal car with used housings.....he's posted here on this forum about it several times I believe.
Timing wise there's not much more to be had but there's still something, especially if you add the APV sleeves etc. Even exhaust wise there's more to be had.
I'm sure racing beat knows that but they must offer a reliable product that works 101 times out of 100.
The ceramic seals on old housings comes from renesis experience. Worn housings seal worse and uneven seal ruins the seals themselves. This is no rocket science and is true for every material.
There's more to that and I still see using fresh housings and ceramic seals as the most reliable way to get the best results out of a built engine.
1) Sven has one opinion about the acceptable use of his product while Dr. Ianetti may have another opinion regarding the use of his own product. BTW, there are some engine builders who do what they do and mandate what they mandate for their rebuilds and they are not directly related to things you may think. When one becomes a professional in any industry and gets paid other peoples' money for their services (which will come with attendant expectations from the ones spending their money) several other dynamics come into play, and all at the same time.
2) You owe me no apology, Giorgio, and don't balme what you know about this stuff on me....
2) You owe me no apology, Giorgio, and don't balme what you know about this stuff on me....
2)I blame my r&d expenses and crazy projects on you, and you know that!
01-20-2012, 08:08 PM
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I know. Since I'm using the MazdaManiac GT3071 upgrade kit, If what MazdaManiac showed on his web is true(300+whp @9PSI), then it is possible to get me there. Also, Kane got 360whp on his 8(ported+3071). Anyway, something around there will already make me happy enough. Plus, I have the meth kit, it might help a bit.