Steam port -AN adapters
#21
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I get that air will come out of a new engine. but if its block than what? All my info comes form a lot of doing,reading, and talking to some of the biggest guys in the business. So you can use the info or do what you want. As far as why GM blocks some and vents other couldn't tell I don't play with stock stuff lol if I can help it
#22
Wegner Automotive has them as well. $6.50 ea.
http://s41657.storefront-solutions.c...l.aspx?ID=3289
Andy1
http://s41657.storefront-solutions.c...l.aspx?ID=3289
Andy1
#23
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looks like you still need hardware, but those are still by far the cheapest, good find andy.
And yeah, JJ, i think all the LSs come from the factory with just 2 ports vented, and the other 2 blocked, so you could do that again, but they put the ports in the heads for a reason right? For me its worth the extra up-to-50$ for the piece of mind that my #7 cyl isnt getting overheated trying to lift the head off.
the car came w a 78mm throttle body too, but that got changed
And yeah, JJ, i think all the LSs come from the factory with just 2 ports vented, and the other 2 blocked, so you could do that again, but they put the ports in the heads for a reason right? For me its worth the extra up-to-50$ for the piece of mind that my #7 cyl isnt getting overheated trying to lift the head off.
the car came w a 78mm throttle body too, but that got changed
#24
Kleeborp the Moderator™
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looks like you still need hardware, but those are still by far the cheapest, good find andy.
And yeah, JJ, i think all the LSs come from the factory with just 2 ports vented, and the other 2 blocked, so you could do that again, but they put the ports in the heads for a reason right? For me its worth the extra up-to-50$ for the piece of mind that my #7 cyl isnt getting overheated trying to lift the head off.
the car came w a 78mm throttle body too, but that got changed
And yeah, JJ, i think all the LSs come from the factory with just 2 ports vented, and the other 2 blocked, so you could do that again, but they put the ports in the heads for a reason right? For me its worth the extra up-to-50$ for the piece of mind that my #7 cyl isnt getting overheated trying to lift the head off.
the car came w a 78mm throttle body too, but that got changed
#25
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I hear ya Steve.. There was a nascar-type team who was searching for an answer due to their detonation/high temp issues at the rear of the engine.. i think they gave up cause they solved the problem in another way, but that was as much tech ive seen thrown at it
#26
Kleeborp the Moderator™
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You've found as much as I have on the issue then...regardless, when I eventually build a new engine, I'll tie the front and back steam ports together just to make sure. If I'm not mistaken, the front and back ports were tied together when GM was still using the LS1 intakes...the LS6 intake had a dropped floor, so they could no longer run the tubes under the manifold, and I guess they just said "to hell with them" and never looked back.
#27
After thinking bout this for awhile I have another question why do you want to run the -4 line anyways. There isn't a flow issue here they are just steam ports wouldn't the factory lines be sufficient.
And as far as blocking the rear/lowest ports, GM has been using the LS1 based engine going on 14yrs now producing millions of variations of the engine. I think that if they need the rear of the head to be vented they would have done so. They have budgets that make NASCAR teams look like pocket change. And when they went to the ls6 intake as was said they got rid of the rear ports due to the drop floor however if they would have been needed I'm sure they cod have found a way around that.
Sorry for the ramble I'm bout half asleep I actually woke up from a dream about this.
And as far as blocking the rear/lowest ports, GM has been using the LS1 based engine going on 14yrs now producing millions of variations of the engine. I think that if they need the rear of the head to be vented they would have done so. They have budgets that make NASCAR teams look like pocket change. And when they went to the ls6 intake as was said they got rid of the rear ports due to the drop floor however if they would have been needed I'm sure they cod have found a way around that.
Sorry for the ramble I'm bout half asleep I actually woke up from a dream about this.
#29
Kleeborp the Moderator™
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And as far as blocking the rear/lowest ports, GM has been using the LS1 based engine going on 14yrs now producing millions of variations of the engine. I think that if they need the rear of the head to be vented they would have done so. They have budgets that make NASCAR teams look like pocket change. And when they went to the ls6 intake as was said they got rid of the rear ports due to the drop floor however if they would have been needed I'm sure they cod have found a way around that.
From everything I've found, blocking off the rear ports *might* only be an issue for someone really pushing this engine beyond what it was designed to do. The people that have addressed it have been those with high HP setups (forced induction usually). GM knows that 95% (probably more) of people that buy something with this engine aren't going to be flogging the absolute **** out of it all the time, and those that do would probably have done modifications that would have voided the warranty anyways. Why worry about the minority of the population?
Those are just my thoughts.
#31
I agree that GM is most definitely profit driven as their ultimate goal. I also agree that most people will not even come close to seeing the limitations of these engine. But I still do not see the benefit of the AN line other than its pretty.
#32
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J. J.
#33
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Wegner Automotive has them as well. $6.50 ea.
http://s41657.storefront-solutions.c...l.aspx?ID=3289
Andy1
http://s41657.storefront-solutions.c...l.aspx?ID=3289
Andy1
J. J.
#34
If the motor is angled slightly back, then I suspect the front only venting would be adequate. In my swap, my motor sits level so I opted to run all four vents. I don't see a need to run -4 lines either, as you don't want flow, just venting. I'll probably get some comments on this, but I ran those Wegner Automotive fittings and used 1/8" compression fittings and high temp nylon tubing to my header tank. The tubing is small, and easy to route. If you're nervous about the nylon, you could run some 1/8 copper of aluminum tubing.
Andy1
Andy1
#38
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I cant remember what that factory covers/caps/plugs whatever you want to call them look like on the truck engines right now, but would it be possible to drill and tap them to accept an NPT fitting?? That would be pretty cheap....I think.
#40
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I think tomz28 actually threaded the cylinder head itself. I was thinking of drilling out the cap thats normally equipped to the truck engines at the rear and tapping those for an NPT fitting. This way you dont need to risk screwing up your heads.