intake porting

[jhef83]

I did a search for pics of porting the hotair intake, didn't find any. I know I need to match the ports to the gasket, just wondering how deep to go into the runners? Should be getting my block and crank back from McGunegills tomorrow.

 

[buickpower]

Go as deep in to the runner as your cutting tool will allow, which is about as far back as you can see. Just make sure to constantly check you are not making holes in the walls in the runners.

 

[jhef83]

That sounds alittle scarey How about a gradual taper from the flange in?

 

[buickpower]

well it's not as bad as i might have made it sound. as long as you are paying attention, you wont put holes in the walls, i just put that in as sort of a disclaimer. You will see what I mean when you take a good look at the ports. Follow the port shape and just enlarge it to within reason. Just use your judgement and common sense.

 

[jhef83]

Thanks alot for the reply. Did you do any work around the injector area?

 

[Lee Thompson]

McGunegills!!!!

Hope those numb nuts are not assembling your block. Before I started doing my own assembly, I had them build me a short block. They torqued the mains to 140 ft lbs. and after 15 minutes of break in time it promply spun a cam bearing. Of course it was not their fault. I hate that place. They still owe me $ 1400 and every time I get a chance to bad mouth them, I will. Best of luck.

 

[buickpower]

Did you do any work around the injector area?

absolutely, that is a major area that needs cleaning up. As you will see, the area under the injector boss normally does not even come close to the size of the rest of the port. open it up to the same size as the gasket in a nice rectanglar shape. The part i am talking about is actually in the flange and you will notice that it is shallower than the rest of the port, just maintain that depth and open it up nicely.

While you are in there, it wouldn't hurt to sharpen the egr hump at the opening of the intake a bit to smoothly divide airflow. good luck

 

[Squid4life]

You can open it up quite a bit, with no worries about the wall thickness. Just keep checking it while porting. You can do a lot of good stuff porting the hotair intake. I have before and after pics of mine, maybe it'll let me post them. It was a huge difference!!!

Squid

 

[Jerryl]

........... It was a huge difference!!!

Jhef83, Don't mean or trying to pirate your thread ......... but since we are on the subject of Hot Air Intake porting .............

Squid,
Please explain. Huge difference in size, performance?
NOT denying the benefit or course of action. We all know that by now. Just wondering (depending on one's goal) if the effort is worth the benefit. More interested in some quantification of "huge" and improvement numbers if available.

 

[Squid4life]

My "huge" description was moreso for port size, as my perfromance gains above "feels a lot better" cannot be documented. I don't have access to (aka: money for) a dyno, flow bench, etc. I didn't even get a chance to use the Gtech meter before I had other probelms. I always thought of an engine as a big air pump. The easier the engine can get air in and out the better. (ported heads, intake, higher lift/longer duration, good free-flowing exhaust, etc) And I know there are a TON more factors to add in like fuel, ratios, backpressure, etc, but this is a VERY basic "idea". I can honestly say the car felt much better, pulled a lot harder, even had a different tone, like switching from 2 bbl to 4 bbl on a carb'ed vehicle. No proof, of course, I am too good at breaking it.

In my opinion, if you have a die grinder or dremel and a few hours, it is time well spent. I have done it on most of my cars I have had to play with, even a '79 Ford Fiesta 4cly I had in Spain! Like I said, just my opinion, my experience, which may not be for everyone. Thanks for letting me post here, even if I am crossing to the dark side... :biggrin:

Squid

 

[Dwayne]

I ported the one on Lee's car and a few others. My suggestion to you would be to HOG the hell out of them. Take as much material off that you can and as deep in the runner as you can. If anything, you are taking weight off the front of the car.....and as said before, really clean up the area around the injector and at the turbo inlet.....Good luck

 

[FWD turbo]

I think the worst part of the intake is the inlet area. It is a big choke point. Hog the crap out of that area. When I did mine, I completely removed the top and walls of th EGR hump. You would be shocked to see how large of an area is inside there. I removed the top and side walls of the hump, leaving a trench in the middle about 1/4 - 3/8 of and inch deep and about 1/2 inch wide. I then took it to a friend of mine who is an exceptional welder and had him fill in the trench and bring it to a peak. I then went back in with the tool and took more out, sharpened it to a point in the middle, and matched it to the curve in the bottom so it would still roll the air. I can't give you any specifics about flow differences, but if you look at a stock one and then compare it to mine, I would say that the difference in air flow has to be dramatic.

I took mine off and ported it while I was waiting for my turbo to come back from being upgraded by precision. so I can't give any direct comparison in performance because it now has a bigger turbo on it. I also still have stock injectors and just replaced my clutch, so I haven't really been able to light it up yet. But I will say this, even though I can't say for sure that the two are related, there is a big difference in spool up. I had a stocker, now I have a 60-1 compressor wheel and a T-31 exhaust wheel in a stock housing. Forget about lag, this thing spools wayyyyy faster than the stocker. Strange, but true. And the only change I made was porting the intake. Everything else is the same, so you would expect some lag and longer spool up with a bigger turbo. And since my car is a stick, I can't build any boost at the line so I can definitely make an accurate and direct comparison in spool up. Like I said, I can't say for sure that porting the intake helped spool, but it is the only change I made while the turbo was off. so maybe there are some benefits that people aren't really aware of. I had a thread about this a while ago titled "Intake-removing the hump?" in the hot air section. You might want to read it, I asked the same question before I did mine. Some of the guys made some good suggestions in the thread. http://www.turbobuick.com/forums/showthread.php?t=151178&highlight=removing+hump I posted some pics of my intake there, but it was the same day of that damn hacker so they all dissappeared.

 

[85 TR]

well i ported mine and took out the egr hump just like fwd turbo but did not have anytingwelded in so i have a small valley were the egr used to be it is very small but still wondered if that is hurting my air flow seems like it would kind of hit a wall ? still i could tell a pretty good diff on the azz dyno.

 

[84T-typeMike]

Hogging in process now!