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Old 02-17-2013, 10:07 AM   #1
00ZX3red
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boost a bad idea?

I have a 00 zetec with 280000km. Im going to add a CAI in the spring. I was thinking of adding boost as well. Do you think the motor could take the extra pressure?

She is currently running 5w20 syn. Hasn't Got a leak and hits redline daily. I do mostly highway drives 150km a day. Are their any prerequisites you guys would recommend or do you feel boost Probably isn't a good idea given her age.

Thanks

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Old 02-17-2013, 02:06 PM   #2
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Do a compression check. If all looks good start out small and slowly add more. Stock block usually around 12-14 psi of boost.
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Old 02-17-2013, 07:00 PM   #3
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Quote:
Originally Posted by 00ZX3red View Post
I have a 00 zetec with 280000km. Im going to add a CAI in the spring. I was thinking of adding boost as well. Do you think the motor could take the extra pressure?

She is currently running 5w20 syn. Hasn't Got a leak and hits redline daily. I do mostly highway drives 150km a day. Are their any prerequisites you guys would recommend or do you feel boost Probably isn't a good idea given her age.

Thanks

John
Agreed with Magus about a compression check.

Quote:
Originally Posted by Magus2727 View Post
Do a compression check. If all looks good start out small and slowly add more. Stock block usually around 12-14 psi of boost.
However I wouldn't go put 12-14psi on a stock block even with the best tune. Most turbo's worth a shit at 12-14 will break a rod (or 2) on a stock block.

Seriously thats some horrible advice.


Anyways, start with a compression check and go from there.
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Old 02-17-2013, 07:56 PM   #4
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Almost every "stock" zetec or "how much boost" thread / post on both this forum and others state that 12 psi that provides about 220-250 HP is fine on the stock block. The JR BBK provided about 8 IIRC. The pro charger about 10psi.... that is not "horrible" advise.
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Old 02-17-2013, 08:00 PM   #5
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start off low like was suggested. wouldnt suggest anything more than 12psi though even if your car is in spectacular working order. i think what he was saying is 14psi is a little much for a stock bottom end. it just depends on how long you want the stock bottom end to last. 14psi might earn you a blown motor before too terribly long.
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Old 02-17-2013, 10:21 PM   #6
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My initial range was a little on the high end... Should have been 10-12 as a max.... But as has been identified in another post two different turbo setups at the same PSI can provide very large differences in output power. So it should be more references on output power in the 220-250 (max) range.
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Old 02-17-2013, 10:30 PM   #7
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even 12psi is alot on any turbo worth a dam.

No one here has a right to post how much he can run without knowing turbo specs. All you are doing is giving him/her a blown motor.

Sure he could run 12psi, but that might last 2hrs vs 2 years.
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Old 02-17-2013, 10:54 PM   #8
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I said "usually"....this is also a open public forum so every one is open to there own opinion. One poster such as my self should not be the only word that is viewed before doing any thing to OP's car. The OP should also search on the forum as this has been asked many times.

Many dyno runs show that 10-12 psi is the approximate value on average that will yield approximate 220-250 HP. Many people and engine builders who on this forum will say that, this is the theoretical "maximum" HP on a stock healthy Zetec block. There are many variables in a FI setup that will all run into reliability and power outputs. One should take a large number of hours and at a minimum few weeks researching what is needed and what is required to do a FI turbo set up.
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Old 02-18-2013, 09:33 AM   #9
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Quote:
Originally Posted by inis View Post
even 12psi is alot on any turbo worth a dam.

No one here has a right to post how much he can run without knowing turbo specs. All you are doing is giving him/her a blown motor.

Sure he could run 12psi, but that might last 2hrs vs 2 years.
Define worth a damn. plenty of high end racing motors run 20+PSI all day long

They're not giving him a blown motor by suggesting a max of 10-12psi, OP is doing that for himself by believing he can boost an engine with that many miles on it without having any problems with it.

Honestly, if you want more power from the engine, rebuild the internals first. forged conn rods, pistons, rings, gaskets, etc. maybe a number of SVT parts and then boost it from there so that you're better assured it's not gonna blow up a week after you put the turbo on it. If this is your only vehicle and can't afford the down time, then maybe look into getting a donor motor on to build up in your spare time and swap when it's ready. This also lets you build the other motor up so you have a spare on hand if/when the current one acts up. ~.^

my $.02 - good luck, whatever you choose to do.
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Old 02-18-2013, 10:36 AM   #10
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By worth a damn, he meant good for performance. 12 psi power will vary by turbo, you can have 12psi with 330wtq or 200wtq, notice I pointed torque and not HP or psi.
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