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Andrew7dg · 03-12-2007

Then no you haven't been reading the previous threads....

I am not going for a huge turbo to make huge amounts of horse power. That is not the point of the thread. I already know that is possible to make huge horsepower with these engine with a huge turbo... I have realized that my car isn't going to be the fastest out there.

Also I have a 6 bolt motor with a 6 bolt head, why would I want a 7 bolt head? Did i forget to mention I had a 90 eclipse...wait i did sorry....

This will turn into my daily driver so I want to enjoy the car in all areas of the rpm range. Not just the top rpm or top hp range. I am sinking all of my money into another street project.

So it sounds like to me the 2g head will work better for me then the 1g so far....

Also You can take pictures of them as much as you want. I have seen pictures that compair both of the heads but I don't want to see size...
If you, look at both heads and see which one has better entry of air. What I have been told and have seen is that the 2g has better entry of intake. the 1g head has a horrible angle. I believe running more boost just covers up this problem in the long run.
Because of the angle of entry, the High HP cars I think are running the 2g head ported so that it flows better and in the long run will outflow the 1g .

"If I am incorrect on anything I said, feel free to correct me, lets keep the correct facts in circulation, not automotive superstition."

Thank you for posting this, this is my thoughts entirely, however if you are going to say this please back up your thoughts.

The idea that E85 "Won't" corrode your fuel system has to have backing. Why won't it? from what I understand, E85 is like Alcohol and it corrodes aluminum. Our fuel system is mostly aluminum and the head is aluminum. I thought you had to treat the fuel rail so that it doesn't corrode because fuel will constantly sit in it? Since my gas tank is metal (lucky 2g have plastic), won't I have to treat that? For the computer issue, I have that solved with a full stand alone system to control air and spark.

But if what you say is true, I have all the components to make the car run on E85? I don't need to do any more exept just fill it up and tune the computer (well I need bigger injectors ofcourse)? That would be sweet!

Ok back to the idea of generating exhaust gas, So did we determin that higher compression won't make the turbo spool faster and if so, it would be minimum and not noticable.
And if it did, the reason is that on the exhaust stroke it is pushing the exhaust out a touch faster because of the compression, not because of the amount of exhaust. This is more believable because if the 1g had lots of fuel unburned it would plug up the cat and there would be massive amount of backfires.

Ok I am going to talk NOT in racing terms but on highway crusing which is off boost. Would I be getting better MPG then because the car has higher compression and generating more power because of the compression.
For example on a lower compression, say going up hill with the cruise control set, the car would be forced to use more fuel in order to get more power from the 7:8. The 8:5 will use less fuel because it is gennerating more power per combustion. This I think would also be at an unnoticable level of fuel consumption, but fun to talk about.

Sorry about the "kick butt statement" I ment it would have the advantage. I don't want to make this sound like it will have a huge advantage. I know that it would be very minimum.

And the turbo differences between the T25 T28 is all on efficiency which is for another thread.

03-12-2007	#16
Andrew7dg Built it from scratch! Join Date: Mar 2006 Location: St. Paul Drives: Currently Mitsu-less Posts: 851	Re: Which Cylinder head? Then no you haven't been reading the previous threads.... I am not going for a huge turbo to make huge amounts of horse power. That is not the point of the thread. I already know that is possible to make huge horsepower with these engine with a huge turbo... I have realized that my car isn't going to be the fastest out there. Also I have a 6 bolt motor with a 6 bolt head, why would I want a 7 bolt head? Did i forget to mention I had a 90 eclipse...wait i did sorry.... This will turn into my daily driver so I want to enjoy the car in all areas of the rpm range. Not just the top rpm or top hp range. I am sinking all of my money into another street project. So it sounds like to me the 2g head will work better for me then the 1g so far.... Also You can take pictures of them as much as you want. I have seen pictures that compair both of the heads but I don't want to see size... If you, look at both heads and see which one has better entry of air. What I have been told and have seen is that the 2g has better entry of intake. the 1g head has a horrible angle. I believe running more boost just covers up this problem in the long run. Because of the angle of entry, the High HP cars I think are running the 2g head ported so that it flows better and in the long run will outflow the 1g . "If I am incorrect on anything I said, feel free to correct me, lets keep the correct facts in circulation, not automotive superstition." Thank you for posting this, this is my thoughts entirely, however if you are going to say this please back up your thoughts. The idea that E85 "Won't" corrode your fuel system has to have backing. Why won't it? from what I understand, E85 is like Alcohol and it corrodes aluminum. Our fuel system is mostly aluminum and the head is aluminum. I thought you had to treat the fuel rail so that it doesn't corrode because fuel will constantly sit in it? Since my gas tank is metal (lucky 2g have plastic), won't I have to treat that? For the computer issue, I have that solved with a full stand alone system to control air and spark. But if what you say is true, I have all the components to make the car run on E85? I don't need to do any more exept just fill it up and tune the computer (well I need bigger injectors ofcourse)? That would be sweet! Ok back to the idea of generating exhaust gas, So did we determin that higher compression won't make the turbo spool faster and if so, it would be minimum and not noticable. And if it did, the reason is that on the exhaust stroke it is pushing the exhaust out a touch faster because of the compression, not because of the amount of exhaust. This is more believable because if the 1g had lots of fuel unburned it would plug up the cat and there would be massive amount of backfires. Ok I am going to talk NOT in racing terms but on highway crusing which is off boost. Would I be getting better MPG then because the car has higher compression and generating more power because of the compression. For example on a lower compression, say going up hill with the cruise control set, the car would be forced to use more fuel in order to get more power from the 7:8. The 8:5 will use less fuel because it is gennerating more power per combustion. This I think would also be at an unnoticable level of fuel consumption, but fun to talk about. Sorry about the "kick butt statement" I ment it would have the advantage. I don't want to make this sound like it will have a huge advantage. I know that it would be very minimum. And the turbo differences between the T25 T28 is all on efficiency which is for another thread. __________________ "A turbo, exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster."