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Old 09-28-2009, 07:34 PM   #1
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I have an SPI turbo kit... and some questions!

Hello sirs!

I bought MUTTLEE's old turbo kit off of ebay MONTHS ago for my girlfriend's focus. I have not installed it yet because she has an automatic transmission that we've got to get sorted out before turboing her car. I'm going to swap it to an mtx-75 or lentech, that's up in the air though.

Anyways, everything in the kit appears to be in good shape. I'm probably going to upgrade some components etc, before installing it. My main question is, what are safe boost levels for the spi? Should we worry about her dropping a valve seat? Anything else we should consider before installing it?


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Old 09-28-2009, 07:36 PM   #2
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as I've heard.......it all depends on the tuning. some it will be 3-4 psi, others I'm sure (I think I've heard) almost 20 psi.
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Old 09-28-2009, 07:38 PM   #3
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Boost is not going to make it drop a seat. Although it could at any time. If you really want to make sure its not going to drop a seat is to get some aftermarket seats. I dont know where if any are out there.

I belive on a stock SPI you can put 8-10 psi. If escortjeff doesnt post in here in a day or two shoot him a pm.
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Old 09-28-2009, 07:40 PM   #4
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20 psi on a stock block? seriously?

I mean, assume the car will be tuned properly. I'm really only looking for something modest like 5-10psi. Maybe not even 10 psi. It's her DD and she's just looking for a little more "go!". The spi doesn't respond to bolt ons so this is really her only option.

edit: beaten!

I thought the cause of the seats dropping was hotter than normal engine temperatures? The turbo wouldn't DIRECTLY cause it, but it's a concern right? I dunno if i feel like removing the head just to do seats :(
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Old 09-28-2009, 07:51 PM   #5
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I dont think there is any ryhme or reason why a valve seat drops on a SPI. People have had them drop at 60k and Im at 150k and still running super strong.

Since you have the kit and no one wants to buy it, Id put it on and let it go.
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Old 09-28-2009, 11:10 PM   #6
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the spi will hold 20 psi! Its a strong block and not much can go wrong on these!

BTW, how much did you pay for this kit? You lucky guy!!!!!!!!!
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Old 09-29-2009, 02:05 AM   #7
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are you ordering pizza,with it ?
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Old 09-29-2009, 04:15 PM   #8
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The amount of boost you can run is just like any other engine...it depends on how good your tuning and engine management is.

One guy can blow his up at 5psi while another guy can run 20psi for years... Low compression (1.9/SPI hybrid) and e85 helps a lot too. :)
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Old 09-29-2009, 05:31 PM   #9
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I dont recommend doing anything with e85 at this time , it is very unregulated and you never know what the actual octane of the end product it so you could see more damage then help from it

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Old 09-29-2009, 08:42 PM   #10
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I'd be amazed if you could get 20 psi on a stock block.
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