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Post by sobeit on Apr 14, 2008 0:54:44 GMT -5
my stock 1.6L 1. can i reuse the oil pump? has 116K on it
2. so i wannaengine wiring, had misc. sensors missing go with basic wiring(no comp controlled)(have the carb)
3. vac advance, egr. im not worried about most of the vacc. crap just wanna kno bout where to hook that stuff up to or if i need some important stuff or if i dont need it.
4. is there ne thing i should check for or something i would really need or need to kno, this is my first rebuild, i have the hone and what not. i have a post also in the wanted section with more info about car.
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Post by hydroli on Apr 14, 2008 8:26:35 GMT -5
Go see "tech tip ; cylinder head identification" to know what you have. I suggest you to change the oil pump. If you put money in this thing it will save you from rebuilding it another time... if it broke, the pump may have swallowed some chip, I let you figure where it may come from. If your short on money, you can bring the pump to a machine shop and ask the guy to mill the cover. What do you want to do with this motor?
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Post by sobeit on Apr 14, 2008 12:01:35 GMT -5
ther is no chips or metal shavings, i just want it to be a daily driver with an upgraded cam.
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Post by hydroli on Apr 14, 2008 18:22:52 GMT -5
do you want it to be reliable? If so, check the pump. If you don't remove the pan, make sure the pressure is ok. It's impotant if you want to race this engine.
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Post by hydroli on Apr 14, 2008 19:36:47 GMT -5
I haven't noticed any change after I installed a 278 cam on my stock head.. Anyone tried a 278 cam with a swirl port head?
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Post by sobeit on Apr 14, 2008 22:46:26 GMT -5
what about the 280 thats in the for sale post
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Post by hydroli on Apr 15, 2008 8:47:18 GMT -5
I think that the head is very restrictive.. You can't benefit from a larger cam with restrictive runners. I would like someone else to give his advice on this since I had misc problems with the engine I tried the 278 cam. If you remove an intake valve you will notice that there is a ramp that force air to turn around the valve stem before accessing the combustion chamber. This is why your head is restrictive, it's to help to save on gas.
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Post by hydroli on Apr 15, 2008 14:22:08 GMT -5
Answer here for technical stuff please I prefer to keep the discussion in one place, facts we investigates are easily retrieved this way. Concerning the turbo you want to put on this thing...
I'm presently building a turbo setup which is going to produce around 200hp. I have a ported straight runners head, a ported intake, big carb, 282 cam... I wouldn't do it to an all stock engine since you may not see a big change... but you will see one for sure. I just want to say that the pressure will be less effective with a restrictive head by two combined effects, mixture quantity and pressure V/S temperature and volume.
There's a rule in physic; V x P = N x r x T. It means, Volume and pressure equals gas quantity (in moles) multiplied with a constant (relative to each gas) multiplied by temperature. You want to have more N (quantity of gas [which is not as simple as a say it's volume cause volume is affected by other variables]), therefore you'll build pressure to achieve this goal, but, temperature will raise, in respect with the constant "r" (that I don't know but would equals, 70% of the Nitrogen's constant plus 30% of the oxygen's constant, per volume), the volume will raise too. If you have restriction and build 7 psi, you won't gain as much as if you don't have restriction, by a combined effect of, a less important volume and a less effective mixture due to the higher dissipation of the gas. I know it's too complicated said like this to what it is in reality but, if you understand the relation between variables, you can see that pressure can't fight restriction to a certain level because temperature is in the way. That's the same effect that won't let you run an overdriven small blower on a big block engine, temp and volume increase and fight pressure and mixture density.
Another fact that has to be understood is that the hot temp may involve pre-ignition... I'm not sure of the relation concerning the last point, since over a restrictive hole, temp dramatically drops (that's what happens in a refrigerator), but, fuel may tend to form droplets which wont burn as well as a uniform mixture, another combined effect...
If I insist on the last explanation it's because I never seen a head as much restrictive as the chevette one. If you want to say "hey I have a turbo!" and be able to follow a civic then, why not. If it's not enough for you, you'll have to change the head or port your's alot.
I'm done for today... if anyone seen an error please say it since I lack concentration when I write things like this. It's supposed to be alright.
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Post by hydroli on Apr 15, 2008 14:35:46 GMT -5
... but the 280 is a good choice.
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Post by sobeit on Apr 15, 2008 22:45:36 GMT -5
yea im going to port intake, gonna try to do the head, mybe port out the swirl, get the turbo w/ header, im also going to get rid of the comp feed back sys.
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