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Old 06-16-2013, 01:24 AM   #1
alexanduh
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Questions on SPI tune, performance, remanufactured head, etc.

Okay, so I'm still driving my 2000 SE and about had a heart attack when I opened the SPI Performance thread page and seen that almost all the posts are about valve seats dropping. I guess it's time to order a remanufactured head; I'm at around 186,000 miles.

Anyway! I had some 14 in. aluminum wheels(unidentified) that were super light and recently went back to the stock 15 in. wheels and I feel like the Focus has lost a significant amount of power. I suppose the smaller diameter lowered the gearing and the weight decreased unsprung weight giving it a little kick in performance but dang, it feels like I'm driving a Metro or something now.

So, my questions are:
-Will a tune make up for that little bit of performance that I lost? What about the Lentech valve bodies? Anything reasonable that might make up for it, tell me. Any decent gains with an exhaust?

-Does anyone have any links to somewhere that I can purchase a remanufactured head that has had positive feedback from members or other Focus owners?

-What else should I look at doing when replacing my head?



---No upgrades. Short ram intake(I guess that could go, but it sounds so good).
2000 Ford Focus SE, SPI, ATX, POS


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Old 06-16-2013, 02:08 AM   #2
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I just found the forum on ECU Tuning so I'll check over there but there is so much cluttered information that your input will help the most.
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Old 06-16-2013, 03:14 AM   #3
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i'm surprised you could notice a differance in going from 14's to 15's. I would go from 15's in the winter to 18x7.5 et35 in the summer. My spi had no issue turning the 18's I had a loss in mileage but not enough to care about.

As for performance stuff, there isn't a whole lot out there. What there is, is rare and not made any more.

Check out my bud David built thread. He's the brain child of SPI performance.

http://www.focusfanatics.com/forum/showthread.php?t=295411
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Old 06-16-2013, 05:50 PM   #4
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186K miles on the original head eh... now that's impressive. Get it replaced ASAP! Most seem to fail around 120K. Here's a reputable source for a new head:

http://www.shop.headsonly.com/FORD-F...ALVES-ONLY.htm
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Old 06-16-2013, 05:51 PM   #5
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YES^^.

I tried to find them last night couldn't remember the company name.
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Old 06-16-2013, 06:24 PM   #6
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Quote:
Originally Posted by Svizzara View Post
186K miles on the original head eh... now that's impressive. Get it replaced ASAP! Most seem to fail around 120K. Here's a reputable source for a new head:

http://www.shop.headsonly.com/FORD-F...ALVES-ONLY.htm
Thanks for the link. Wasn't there a few members on here who reached +200K?
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Old 06-21-2013, 02:36 AM   #7
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Quote:
Originally Posted by alexanduh View Post
Thanks for the link. Wasn't there a few members on here who reached +200K?
Mine got to 220 and only dropped because my buddy took it out cocked one night, pinging it off the rev limiter in third.
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Old 08-15-2013, 02:01 PM   #8
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I have used headonly's heads 6 times now, about to order #7 tomorrow for another SPI I am fixing. BTW, my wifes 97 escort had 172k before it dropped, the others were around 110-115k and the lowest had 79k miles, a 02 focus
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Old 08-17-2013, 12:31 AM   #9
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I just built a new engine with the heads only head this past week. 300 miles in the last 3 days and seems great so far. I know that's not much for a vouch but their customer service and product seem great. I wouldn't hesitate to use them again.
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Old 02-07-2014, 09:12 PM   #10
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By replacing the head will it remove the issue of the valve seats dropping? After reading this forum im contemplating replacing the heads if this is so, because hearing that the seat goes as early as 70k when my se wagon is at 143k is rather worrisome and if it can be avoided I'd like to know. Thank you.
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