If anyone on here is bidding on this, stop now and save your money. It still have the stock butterfly!
JUNK!
Just a heads up.
2012 HD VRSCF
2010 Ford Explorer
2006 Ford Ranger
2004 Chevy Cavalier
I thought all of them still had a stock butterfly?
I think thats like the same one every other place sells
No, mine is a reveco tb, it has a bigger plate same as the rsm tb.
2012 HD VRSCF
2010 Ford Explorer
2006 Ford Ranger
2004 Chevy Cavalier
yes that dose look crappy.
NOTICE THE PERSON BIDDING THIS ITEM UP HAS ONLY BEEN ON EBAY 2 DAYS!!! HE'S PROBABLY BIDDING HIS BULLSH!T TB UP!!! LET HIM BE THE WINNER HE WILL PROBABLY END THE AUCTION IF NO ONE ELSE BIDS.
SORRY FOR THE CAPS!
JimmyZ is right, the listing didn't say anything about the
butterfly being larger,. The seller just said that the opening was
tapered to 68mm "down to the butterfly".
That taper is WAY too short. I think it would definately impede on airflow.
fortune cookie say:
better a delay than a disaster.
JimmyZ wrote:Actually, it's not junk. SPS and other companies have been selling tapered throttle body bores for years with excellent results on Saturn 1.9 engines and more recently for Ecotecs.
The original design was an improvement on the 50mm stock 1.9 throttle body. They started with a 52mm bore tapering back to the stock 50mm and back out to 52mm. Later on several companies released 56-52-56 tapered bores as later throttle bodies came with more machinable material around the throttle bore.
The taper to 50mm acted to raise inlet velocity without causing the same restriction as seen on the throttle body with the smaller diamer for it's entire length. The 52-50-52 throttle body posted flow bench numbers less than 1% off from a straight through 52mm TB, but behaved much differently on the engine because of differing flow velocities. This is a common practice going all the way back to the days or carburetors. While I can't say I've ever never seen a taper quite that extreme, the reasoning behind it is still sound. Just because SCC doesn't endorse it doesn't mean it doesn't work.
^Very good info, I was thinking the exact same thing on increasing the air velocity. This is exactly how a carborator works having the fuel brought into the air flow.
-Aaron
www.TurboTechRacing.com
Performance Parts For Cavalier, Sunfire, Cobalts and More!!!
I would think that TB actually has a more legitimate performance gain than putting a 62mm throttle plate on a mostly stock, or bolt-on only engine.
Beyond that, you say this like the guy is trying to pull a scam, it says right in the auction info that it retains the stock throttle plate, so its not like he's trying to fool anyone, so what's the big deal?
Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said
Another uninformed post brought to you by j-body.org!
There is no Performance Gain there! I actually got one done from him awhile back and had it dynoed! I lost o.8 hp and the only thing i did was changed to his tb. This is nothing you can't do by buyinh a dremel and doing some grinding and polishing! SAVE YOUR MONEY!
I knew the stock plate was in there, thats why I posted. Mine is tappered also but it has a bigger plate. I don't see how this one would help any.
2012 HD VRSCF
2010 Ford Explorer
2006 Ford Ranger
2004 Chevy Cavalier
James, the stock TB is actually more than big enough for the 2.2 Eco, it will flow more air than any motor with just bolt-ons would need. On a boosted motor that TB would be a restiction.
There my Pictures in his Auctions- Check out the comparision Pic on his auctions thats mine too. I'm here to bs anyone and do believe what your saying but it's gonna take more then someone dremeling out a stock tb w/o a bigger plate to see some gains.
He buys stock tb's on ebay and dremels them out and sells them- It's not a big deal but for $100 bucks you could invest in somthing better for more gain thats all im saying!
Turbo Tech Racing wrote:JimmyZ wrote:Actually, it's not junk. SPS and other companies have been selling tapered throttle body bores for years with excellent results on Saturn 1.9 engines and more recently for Ecotecs.
The original design was an improvement on the 50mm stock 1.9 throttle body. They started with a 52mm bore tapering back to the stock 50mm and back out to 52mm. Later on several companies released 56-52-56 tapered bores as later throttle bodies came with more machinable material around the throttle bore.
The taper to 50mm acted to raise inlet velocity without causing the same restriction as seen on the throttle body with the smaller diamer for it's entire length. The 52-50-52 throttle body posted flow bench numbers less than 1% off from a straight through 52mm TB, but behaved much differently on the engine because of differing flow velocities. This is a common practice going all the way back to the days or carburetors. While I can't say I've ever never seen a taper quite that extreme, the reasoning behind it is still sound. Just because SCC doesn't endorse it doesn't mean it doesn't work.
^Very good info, I was thinking the exact same thing on increasing the air velocity. This is exactly how a carborator works having the fuel brought into the air flow.
I disagree. A tapered opening works better for a carb because it increases the vacuum signal to the fuel inlets, giving better atomization, not better air flow. You're right that it does increase velocity through the smaller diameter opening, but as soon as it's back in the larger opening that velocity gain is lost. So it's benificial in a carb, but not in a tb.
To take this to a rediculous extreme, would a tb with a 150 mm opening and a 40mm throttle plate be better? Nope. But it would have some serious velocity improvement around the plate.
John Wilken
2002 Cavalier
2.2 Vin code 4
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