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On a 5.0 (87-93) the stock TB is 60mm and an upgrade is recomended to a 65mm. The 65mm is said to work well up to 500hp or so. My question..is it worth it to go up to a 70mm or will 65mm be cool? Will 70mm be overkill? I know our engine is not a 5.0 but I have to ask. Luckily we have 2 people that just did both 
joshua_drew@hotmail.com
AIM "nerdsalot2"
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1998.5 Black Contour SVT
1998 ZJ Limited 4.0L AWD
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Honestly, a 65 should be fine on a 2.5, and as Aussie has shown, it appears to need less hacking to make work. I'm sticking with the 70 on mine mainly because I got a good deal on it, and it works well for me. And of course, if I ever do the 3.0, it'll be just right.  dan
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I ran some really quick and dirty calculations the other day, and it looks something like this:
stock 2.5L - 63mm
svt 2.5L - 65mm
3L w/ svt upper - 70mm
Ideally for max power you should run a TB that is just large enough to feed both intake runners during high-rpm operation. Any larger and other crap may come into factor (i.e. driveability concerns at part throttle, etc.).
\'94 Cobra #4963/5009, black on black, not quite stock Formerly owned a black '00 SVT, #1972 Join the SVTOA! RIP - Ray "Old Fart Emeritus" McNairy
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B likes being the CEG guinea pig
\'94 Cobra #4963/5009, black on black, not quite stock Formerly owned a black '00 SVT, #1972 Join the SVTOA! RIP - Ray "Old Fart Emeritus" McNairy
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I can get a 70mm from a friend. If I put that on I am assuming MAF will need to be upped and then I have to get that "AIR" out somehow. Y-pipe is on order and cat-back in in but Headers wont happen for a while.
joshua_drew@hotmail.com
AIM "nerdsalot2"
*************************
1998.5 Black Contour SVT
1998 ZJ Limited 4.0L AWD
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anyone have the ford part number for the 65mm TB so i can call Gary at Atascadero Ford Outlet and get one? he needs and exact number or an exact application...
Nikolas
1999 Mercury Cougar V6
KKM Intake,SVT TB, SVT Upper/Lower, 19lb injectors, Diablo Chip, MSDS Headers, Custom Exhaust, B&M Short Shifter, Progress Lowering Springs, 18" Axis TC's, OMP Strut Bar, AAM 24mm Rear Sway Bar, Koni Struts
15.09 @ 91.54(corrected, pre-SVT conversion, DiabloChip, and Injectors)
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I am waiting for my 96 GT 65mm TB to come in from Steeda. I picked it up for $30. When I get it I will post the P/N.
Regards
1998 SVT Contour E1, Black 2001 Honda SuperHawk VTR1000F "I bent my Wookie" www.mamisano.com
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I have a used 70mm FRPP TB coming my way, supposed to ship this afternoon. Should go nicely on the 3 liter, especially when I get the Sho Shops upper to match the "missing" secondaries.  I was just thinking... 3.0 HiPoFoMoCo, SE MTX, FRPP TB, SMA Ex, PF MAF, BNM SLD MM... Some nice code talk we're coming up with here...
Brad Noon '99 SE MTX 3 point oh my God H.O. 179HP/178TQ BNMotorsports Floormats, powder coating, TB optimizing, Gutted cats, etc BNMotorsports is now the preferred distributor of Contour/SVT/Mystique Indiglo style gauges!!!bnmotorsports@msn.com
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so if i just say it is a TB off a 96 GT then i should be set eh? hmmm....i wonder how much it will cost...
Nikolas
1999 Mercury Cougar V6
KKM Intake,SVT TB, SVT Upper/Lower, 19lb injectors, Diablo Chip, MSDS Headers, Custom Exhaust, B&M Short Shifter, Progress Lowering Springs, 18" Axis TC's, OMP Strut Bar, AAM 24mm Rear Sway Bar, Koni Struts
15.09 @ 91.54(corrected, pre-SVT conversion, DiabloChip, and Injectors)
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Just ordered the 65mm from Steeda 5 minutes ago!! Dude said there is one left. Hurry!
joshua_drew@hotmail.com
AIM "nerdsalot2"
*************************
1998.5 Black Contour SVT
1998 ZJ Limited 4.0L AWD
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