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Old 03-11-2007   #1
Andrew7dg
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Re: Which Cylinder head?

How much horse power... Isn't that the ultimate question....
Maybe I am kind of new to this but what do you mean by which style of dyno?

I am thinking if I got 350-450hp I will be very very happy. I kind of gave myself a limit on how much horsepower I want to give. Why, well it mainly has to do with money. I am broke! So I want to get the most out of my small budget. When I say 350-450 those are the top numbers. It is easy to get those numbers from just bolting up a turbo (well there is a little more to that then just a turbo bolt up...) but I am interested in making the engine perform well with the parts that I have added to give the car good responce. I am going to leave the transmission stock simply because it was rebuilt at the 10,000 miles ago and I don't have the money for a shep trans. I think (and hoping) that the stock trans will take the horse power. Passed the 500 hp limit, I know it won't. Plus I have to go buy a 4-bolt rear end for the car first before transmission. I also want to beef up the suspension which will be more money.

Definatly I should get the 272 cams

I went with the 8:5 compression just for better responce however I had a question about that. I have read somewhere that it does give better responce but it doesn't give better spool up time. The only reason people think so is because higher compression works better off boost before boost kicks in. Is this true and is there proof that the higher compression spools up turbos faster? I wasn't sure about this. I am more toward the idea that the only reason you get better responce is because 8:5 works better then 7:8 off boost and then when boost kicks in, you get more horse yet. And the the idea that 10 psi on a car with 7:8 compression is a lot different then 10psi on a car with 9:0 compression. I wanted to go with evo 3 pistons that had 9:0 compression but couldn't find any.

I am thinking the 2g head will work better also. I had the question then, would oversize valves help? or would that only be for higher RPM applications?

When I am out of college, I will have a much larger budget and I plan on building up an mitsu close to the 4 diget club. Then I will get the Wiseco/Eagle combo, shep transmission, and all the other good stuff that I have been dreaming about. But first I want to learn on my DSM first. I just want to play around with combos and see what works best. it is just the engine building I enjoy, and making the parts work well with eachother. Then taking information I believe I can build a kick ass Evo or something!

And plus in the end which car would you have more respect for, a car that a kid just threw a lot of money in to make it run fast, or a car that someone put lots of time, custom diy parts, and actual practical engine building knowledge into the car.
I am getting sick of seeing cars that are built up and people still don't know why they are fast. All they know is if they buy this part it will give their car 20hp more.

Sorry got off subject a little.
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Old 03-12-2007   #2
iceminion
 
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Re: Which Cylinder head?

Quote:
Originally Posted by Andrew7dg View Post
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.
Thanks for accusing me of not reading.

Quote:
Originally Posted by Andrew7dg View Post
I am thinking if I got 350-450hp I will be very very happy
Listen, 350-450HP on the Dyno, ANY Dyno is huge engine HP. and you can use a 2g head, but you are going to have to make up for the restriction in the system somewhere else, bigger turbo/more boost.

Quote:
Originally Posted by Andrew7dg View Post
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....
The 1g 7-bolt head outflows/out performs the 1g 6-bolt head, its designed much better, everything bolts up fine, the only thing you will have to do is take it to a machine shop, or find someone with a drill press and have them drill out the head stud holes (BTW, you will have to do this with a 2g head also)(6-bolt=12mm/7-bolt=11mm(i think))

E85 will not damage your fuel system, everyone in minnesota runs E10(with the exception of some special stations), if what you feared about E85 where true, then E10 would also corrode the system, which it does not.....Still dont believe me? go to a gas station, fill up a large glass jar of E85, take an old fuel rail, put it in the jar, seal, wait and see. I did this test myself, and now I have a clean fuel rail, and one hell of a molotov cocktail to throw at all of the e85 haters out there!
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