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Old 07-13-2010, 03:44 PM   #1
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Newbie Question....How much boost?

This is my first post and my first Focus. I just picked up a 2001 ZX3 with 70K (Carfaxed), and I'm amazed by the amount of relatively inexpensive performance parts. I'm thinking of adding a turbo (intercooled). How much boost is normally considered "safe" in these things with 70K on the clock? Are there any other "weak links" I should address when adding boost? Any opinons/tips/experiances would be appriciated. Thanks up front.


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Old 07-13-2010, 03:59 PM   #2
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Newbie Question....How much Boost

This is my first post and my first Focus, and I think my first mistake (I originally posted this in another forum). I just picked up a 2001 ZX3 with 70K (Carfaxed), and I'm amazed by the amount of relatively inexpensive performance parts. I'm thinking of adding a turbo (intercooled). How much boost is normally considered "safe" in these things with 70K on the clock? Are there any other "weak links" I should address when adding boost? Any opinons/tips/experiances would be appriciated. Thanks up front.
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Old 07-13-2010, 04:26 PM   #3
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We got it fixed for ya...
Merged the duplicate posts, and moved them to the Forced Induction Chat forums.
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Old 07-13-2010, 04:32 PM   #4
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well, depends. check ur compression. if its good, you don't want to go much above 12 psi. 12 psi is usually very safe! that will put you at about 220-250 whp pending turbo choice. things like rods start to go after 250 whp. also, do you have an auto or manual?
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Old 07-13-2010, 05:37 PM   #5
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Originally Posted by mlbbaseball View Post
well, depends. check ur compression. if its good, you don't want to go much above 12 psi. 12 psi is usually very safe! that will put you at about 220-250 whp pending turbo choice. things like rods start to go after 250 whp. also, do you have an auto or manual?
Sorry....I should have mentioned it is a 5 speed.

Unless I figured the power to weight ratio wrong 225-250 RWHP should be almost enough to have some fun. So if I stay on the safe side of 12 lb's of boost I shouldn't have to go into the bottom end? Is there anything else on the intake, top end, or driveline that has to be upgraded at these power levels? I'm ABSOLUTELY sure that there are many things that can be upgraded, but is there anything else that would you consider a necessary upgrade?
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Old 07-13-2010, 05:56 PM   #6
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Sorry....I should have mentioned it is a 5 speed.

225-250 RWHP
I think you mean fwhp bro these aren't rear wheel drive

But you also need to look at tuning as well, a wideband is what I consider a must have, then a bigger tb to help airflow, a fmic and exhaust.
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Old 07-13-2010, 06:22 PM   #7
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Unless I figured the power to weight ratio wrong 225-250 RWHP should be almost enough to have some fun.
You calculated it wrong then. "Almost enough"? Hah. 250whp will put a hurting on so many cars. The reason being you'll be putting down probably 240 lbs-ft o' torque. You'll be happy with 250 for a while.
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Old 07-13-2010, 06:28 PM   #8
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I think you mean fwhp bro these aren't rear wheel drive

But you also need to look at tuning as well, a wideband is what I consider a must have, then a bigger tb to help airflow, a fmic and exhaust.
Ok....now you KNOW I'm a newbie. I haven't even made the adjustment to FWD yet sorry.

Tuning no problem, Wide band O2 got, TB I got, exhaust I got, so what is a fmic, I'm familiar with FMC (fuel management unit) but not quite sure of what an fmic is.
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Old 07-13-2010, 06:44 PM   #9
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You calculated it wrong then. "Almost enough"? Hah. 250whp will put a hurting on so many cars. The reason being you'll be putting down probably 240 lbs-ft o' torque. You'll be happy with 250 for a while.
I think I figured right. I found the weight of a 2001 ZX3 to be 2598. Divided by 250 is about 10.3 lbs per HP....right? I've kinda grown accustom to something more in line with about 6lbs per HP.....but don't get me wrong I think a 250 FWHP Focus would be a ABSOLUTE BLAST!!!! Thats what I found so interesting about these things. Thanks
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Old 07-13-2010, 06:54 PM   #10
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FMIC= front mount intercooler. I suggest reading up before you go down this road. The stickies are a great place to start.
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