2GR-FSE Engine rebuild (2008 IS350)
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KIS350 (11-03-18)
The following users liked this post:
KIS350 (11-03-18)
11-01-18, 08:34 PM
#49
Driver
Thread Starter
More pics comin soon.
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KIS350 (11-03-18)
11-02-18, 05:56 PM
#53
Driver
Thread Starter
Yeah....I'm thinking the same thing. I literally found one Crankshaft and only one. I pounced on it. However the same year makes of the GS350 and GS450h share the same FSE engine and internals. But looks like they're just as rare as the IS. 😖
11-02-18, 06:02 PM
#54
Driver
Thread Starter
Head porting...
Does anyone have any insight into the internal casting of these heads. The casting actually doesn't look to thick... I've started to rough out the one on the left. So far simply blending the valve seat port machining marks into the casting. Which definitely will help. And removing the casting seams and flashing bits. But I'm real cautious of the casting integrity around the port.
Last edited by KIS350; 11-03-18 at 05:44 AM.
11-03-18, 07:51 AM
#55
Driver
Thread Starter
Head Porting
Good comparrison pic of the intake ports. Mild porting on left and untouched factory port on right.
Untouched factory intake port from 2GR-FSE head.
Mild porting and blending to intake port on 2GR-FSE cylinder head.
Last edited by KIS350; 11-05-18 at 08:52 AM.
11-03-18, 12:31 PM
#56
I know the ISF guys were really cautious of water jacket beyond that I got nothing. Look for oil passages too!
Are the untouched ports full of carbon or what am I seeing there?
JM2C but I wouldn't make it any smoother than that? You using a bunch of flapper discs?
In terms of flow, little needs to be made bigger where upper/lower runners meet, just match size maybe leaving the upper assembly a smaller OD such that there is no reversion when assembled if not aligned perfectly.
Can you share a couple of pics of the intake side where the ports split? Just picture smooth transitions. Less bumps but small keeps the velocity up for a good mix in the combustion chamber...
Have fun! Don't forget your OSHA related gear! =)
Are the untouched ports full of carbon or what am I seeing there?
JM2C but I wouldn't make it any smoother than that? You using a bunch of flapper discs?
In terms of flow, little needs to be made bigger where upper/lower runners meet, just match size maybe leaving the upper assembly a smaller OD such that there is no reversion when assembled if not aligned perfectly.
Can you share a couple of pics of the intake side where the ports split? Just picture smooth transitions. Less bumps but small keeps the velocity up for a good mix in the combustion chamber...
Have fun! Don't forget your OSHA related gear! =)
11-03-18, 06:21 PM
#57
Driver
Thread Starter
I know the ISF guys were really cautious of water jacket beyond that I got nothing. Look for oil passages too!
Are the untouched ports full of carbon or what am I seeing there?
JM2C but I wouldn't make it any smoother than that? You using a bunch of flapper discs?
In terms of flow, little needs to be made bigger where upper/lower runners meet, just match size maybe leaving the upper assembly a smaller OD such that there is no reversion when assembled if not aligned perfectly.
Can you share a couple of pics of the intake side where the ports split? Just picture smooth transitions. Less bumps but small keeps the velocity up for a good mix in the combustion chamber...
Have fun! Don't forget your OSHA related gear! =)
Are the untouched ports full of carbon or what am I seeing there?
JM2C but I wouldn't make it any smoother than that? You using a bunch of flapper discs?
In terms of flow, little needs to be made bigger where upper/lower runners meet, just match size maybe leaving the upper assembly a smaller OD such that there is no reversion when assembled if not aligned perfectly.
Can you share a couple of pics of the intake side where the ports split? Just picture smooth transitions. Less bumps but small keeps the velocity up for a good mix in the combustion chamber...
Have fun! Don't forget your OSHA related gear! =)
Thanks!! And yeah that's just carbon build up inside the untouched one. The casting isn't too bad from factory in the way of flashing and casting seam.
I'm using several different tools. From a carbide burr down to sanding rolls. I'm not polishing the ports, for the same reasons you mentioned. And I'm port matching as best I can...Its a little bit harder to match cc's on a dual valve port tho...never thought of it before. If you have heard of any tricks let me know.
I am polishing the combustion chamber simply to help slow carbon buildup and hoping it helps the top end carbon cleaner down the road. I've also mildly blended the casting in the combustion chamber to clear around the valve seat.
I'll upload some pics of the intake side of the head tomorrow.
Thanks for your input!
11-05-18, 08:49 AM
#58
Driver
Thread Starter
Photo from intake side of ports.
I have to go across and remove the casting seam on this side still. There is a bit of a difference beetween the intake and the head, but I don't think go as far as matching them. The casting is super thin on the outside portion of casting. And the intake is super thin from the factory too. So I'll leave it alone.
Notice the notch on in the casting on the right side of the port? This exists only on the inside wall of the two furthest out ports on each head. The center port doesn't have this. Not sure why it's there and doesn't continue into the intake casting. Only exists in 4 of the six ports in the head.
Still thinking I'll knife edge the port deviding wall. Its directly in front of the port injectors so aside from reducing the airflow restriction of it, I believe it will help with the fuel flow as well as it will better devide the fuel spray rather then collecting it on the radius of the casting...unless someone can give me reason not to, I think I will knife edge it.
Last edited by KIS350; 11-05-18 at 01:44 PM.
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2013FSport (11-05-18)
11-05-18, 05:57 PM
#59
Clearly they did the four ports that way to prompt this conversation; "why'd they do that!???"
I doubt it has much impact but maybe just radius the step.
Notice the port is actually a D shape. Perhaps set the upper manifold on and see if it has anything going on in that area?
As for the knife, I've seen it done by others but without a flow bench, hard to say.
Injector is firing right above and it should be mist of fine droplets into the airstream. That said it seems to me that hitting a blunt object **could** drop those droplets out of suspension making them less combustible as they flow past the valve. But honestly just guessing. Fuel is heavier and far less likely to turn and move with the airflow so, ya I would sharpen that edge and blend. Again, leave it rough.
As you sleep tonight think of leaf blowers, shop vacs, flow meters, and flow at max valve lift!
Oh to have a flow bench!
I doubt it has much impact but maybe just radius the step.
Notice the port is actually a D shape. Perhaps set the upper manifold on and see if it has anything going on in that area?
As for the knife, I've seen it done by others but without a flow bench, hard to say.
Injector is firing right above and it should be mist of fine droplets into the airstream. That said it seems to me that hitting a blunt object **could** drop those droplets out of suspension making them less combustible as they flow past the valve. But honestly just guessing. Fuel is heavier and far less likely to turn and move with the airflow so, ya I would sharpen that edge and blend. Again, leave it rough.
As you sleep tonight think of leaf blowers, shop vacs, flow meters, and flow at max valve lift!
Oh to have a flow bench!
Last edited by 2013FSport; 11-05-18 at 06:01 PM.
