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Old 11-23-2011, 02:50 PM   #21
apagios
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Quote:
Originally Posted by SVTFocusOnMe View Post
Yea I think the car should want to rev easier. It feels like it takes forever to actually take off in first gear because of the slow response.
Actually i think if you are talking about it taking forever to rev in 1st gear and pull away you are more concerned with Flywheel.

The throttle response is "slow", but I think what you are feeling is the engine trying to spin up. Do you have a stock flywheel?

Stock flywheel is 24.5 lbs, I have a spec 12 lb Al flywheel and my SVTF revs like crazy. I love it.

And Yes I can feel the sluggish throttle response when I first start, but "slow" response to the throttle input is still on the order of vastly less than 1 second. I suspect your sense of "takes forever" is most likely due to the engine spinning up a 24.5 lb flywheel. If your sense is that it's on the order of seconds, you are no longer talking about throttle response.

Personally I looked at the CFM throttle body a lot and came to the conclusion that with a light weight flywheel I could just deal with the less then 1/4 second throttle response delay since my engine revs so much faster now. $250 is a LOT of money for only 1 or 2 mm. No way I am spending that much money to gain 1 mm in diameter with the BBK. Let alone 2 mm for the CFM. (for a street car, if you are competitively racing the SVT where every ounce of performance counts, I can understand forking over for a slightly larger TB)

If you don't have a light weight flywheel I suggest looking into them seriously when you come due for a new clutch. They are very common to come with a clutch kit since it's easily done as 1 job. I am not sure I would spend the money to put in a lightweight flywheel if I didn't need a clutch though.

As a random plug, I love my Spec Stage 2 clutch & Al flywheel, I am on my second one (1st kit was to replace stock at 45k miles when the stock one crapped out, that lasted till 120+k miles even with LOTs of downtown DC driving in traffic, and I replaced it early during some other work)
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Old 11-23-2011, 06:43 PM   #22
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I feel a slight bog in the throttle when I shift (2.5-3k rpm), if I only get on the throttle light-medium. If I'm in the throttle fairly hard, I don't notice it. Was wondering if this was the sort of thing that a throttle body replacement would help with. I don't need a clutch anytime soon (hopefully), and am not wild about all the noises and clunking I'm reading about with aftermarket clutch/flywheel setups in these cars. Those noises would make me nuts...
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Old 11-23-2011, 08:16 PM   #23
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Throttle body

I ported my stock throttle body and you will feel a considerable improvement in throttle response and engine power below 2000rpm, now I don't know for a fact that I'm making any more power, but I can tell you that it feels more like I thought an SVTF should and you will enjoy driving the car a lot more.
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Old 11-24-2011, 07:18 PM   #24
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BBK's headquarters is literally like 5 miles from my house. I just had to say that lol.
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Old 11-30-2011, 03:01 PM   #25
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Quote:
Originally Posted by iminhell View Post
BBK is 1mm larger than stock, CFM is 2mm larger.
If that convinces you to spend $250 so be it. I don't think it's worth it.

Stock: 20.5735 in^2
BBK: 21.2114 in^2 (0.6379 in^2 larger than stock)
CFM: 21.8591 in^2 (0.6477 in^2 larger than BBK)
I don't see how this can be....

I remember when I had my old FC 65mm TB, my stock SVTF TB would actually fit inside the the FC 65mm TB. I wish I took a pic to show it.

As for the OP, I have only seen one a normal zetec BBK TB, the outsides of it isn't as smooth as the FC or CFM ones. But it worked perfect like the others. Find someone with a Powerworks SC kit installed. I think some of those kits came with a larger BBK TB.

But TurboTom is correct, i liked how everyone ignored him. A bigger TB will not yield HP gains, just better throttle response and a stiffer gas pedal due to the stiffer spring on the new TB. Porting the stock TB would be the more economical move or find one used...
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Old 02-21-2013, 11:36 AM   #26
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Okay so resurrecting this tread from the dead because I finally got the BBK TB. I have no way to compare it to the CFM but I am very impressed with the quality and impact the part has on my car.

I wrote this in another thread already but I figured I would throw it in here too. The BBK TB is on ebay for 250 shipped or make an offer. I offered both sellers 200 for it and they both accepted. Not a guarantee that it will be the same for you but if your in the market for one I think it is worth a shot. Links below...

http://www.ebay.com/itm/BBK-02-04-FO...3ccab6&vxp=mtr

http://www.ebay.com/itm/BBK-1754-02-...75d9b7&vxp=mtr

If anyone would like I can post pics of it installed.
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Old 02-21-2013, 07:40 PM   #27
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Ooooor you could support a site sponsor, like CFM, and purchases directly from them. Sooooo CFM continue to make parts for the mk1.
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Old 02-21-2013, 08:53 PM   #28
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How am I a bad person for buying a quality part from a reputable company and save myself money?
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Old 02-23-2013, 06:31 PM   #29
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Never said "bad" or " person" in my post. Personally, I'd rather support a company that's makes more than one part for an aging chassis.
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Old 02-24-2013, 05:27 PM   #30
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I just left the eBay seller from post/link above a "Best Offer" of $200 (free shipping).
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