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Old 04-19-2010, 02:49 PM   #1
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Piston and Rod options for BOOST ???

Its time for a serious engine build!

I was running 5psi of boost on stock engine with a homemade turbo setup.
It is currently out of commission after the stock clutch finally quit grabbing after 6 months of pure boosted torture.

I've got a new performance clutch on order and now its time to focus on the engine.

The engine is a 2.0 Zetec and has 100,000 miles on it. The last 10,000 of that was with boost and driven HARD. It was still running decent when I stopped driving it. It was making an odd random popping noise that seemed to be coming from the passengers side of the engine. It didn't seem like a noise that would come from the rotating assembly (crank,rods or pistons). It seemed more like something in the timing belt/serpentine belt area. I was told the timing belt tensioner were known to fail in these cars. Is there anything that is known to go wrong in that area that could cause a random tick,popping noise?

Also what kind of pistons and rods are you guys that run big boost running?
I see JE and Ross pistons both carry 9:1cr pistons. I was looking for something lower.


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Old 04-19-2010, 03:40 PM   #2
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How much power we talking. 9:1 should be fine.
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Old 04-19-2010, 03:53 PM   #3
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looking for 250whp. planning on running about 14 psi of boost.
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Old 04-19-2010, 03:59 PM   #4
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250whp will run for years on a bone stock Zetec if you keep the maintenance up and don't rag on it when you feel/see a problem.
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Old 04-19-2010, 04:06 PM   #5
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In answer to your question a lot of people on here run the eagle hbeam rods. They are around $300 or so for a set of 4. They will handle what you want. Pistons is just a matter of personal opinion.

I was running my stock zetec at 11-12 psi making 223 before i made some more modifications. Id like to think I was at 230. The only reason im doing a build now is because I have bad compression. I would check your compression to see if you need to even do a build. Im pretty sure you would be happy with 230-240 and that is doable on stock internals and would save you some $$$.

Also if your transmission is out and you are looking for that power you probably want to look into a different differential. Your going to have a lot of traction issues with the stock open differential.

Also the 9:1 compression is plenty low for your power goals. Supertech makes some 8.7:1 and Ive seen 8.5:1 out there too but you really dont need that low of a compression piston for 250 whp.
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Old 04-19-2010, 04:21 PM   #6
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Good Idea about the diff. Who makes an LSD for this trans. Any part #s

I might as well build the motor now because it WILL end up blown up if I dont. Its all tore apart right now so its the perfect time.

So heres the list I've got so far.

JE 9:1 pistons
Eagle H-beams
ARP head studs

Now I've got even more questions.

Should I bother with aftermarket valves?
Do these heads have much material in the ports I can hogg out? Valve unshrouding?
How much boost can that cheap plastic intake manifold deal with?
Is it worth upgrading my cam? Are there any cam grinds out there that suit a turbo application?

Also, haven't heard anything about that noise I was talking about.
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Old 04-19-2010, 05:54 PM   #7
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Ive been wondering about a turbo cam as well. I'll be putting on a roush kit and was curios what turbo cams are out there.


Quote:
Originally Posted by ford_boy View Post
Good Idea about the diff. Who makes an LSD for this trans. Any part #s

I might as well build the motor now because it WILL end up blown up if I dont. Its all tore apart right now so its the perfect time.

So heres the list I've got so far.

JE 9:1 pistons
Eagle H-beams
ARP head studs

Now I've got even more questions.

Should I bother with aftermarket valves?
Do these heads have much material in the ports I can hogg out? Valve unshrouding?
How much boost can that cheap plastic intake manifold deal with?
Is it worth upgrading my cam? Are there any cam grinds out there that suit a turbo application?

Also, haven't heard anything about that noise I was talking about.
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Old 04-19-2010, 05:59 PM   #8
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cams and head work really are a waste of money. you will easily make the power you are looking for or a lot more on the stock head and cams. you will not see any more gain than one more click on the boost control would make up for.
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Old 04-19-2010, 06:10 PM   #9
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Quote:
Originally Posted by Turbo Turtle View Post
cams and head work really are a waste of money. you will easily make the power you are looking for or a lot more on the stock head and cams. you will not see any more gain than one more click on the boost control would make up for.
Agree 100%

If your only wanting 250 (which that will change ) then go back stock it will hold it fine , If not then

Eagle rods
Forged Pistons
ARP head and main studs

Tom
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Old 04-19-2010, 09:25 PM   #10
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Quote:
Originally Posted by 1turbofocus View Post
Agree 100%

If your only wanting 250 (which that will change ) then go back stock it will hold it fine , If not then

Eagle rods
Forged Pistons
ARP head and main studs

Tom
What do you mean "which that will change" Tom?
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