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Does anyone know the compression ration of the stock svt pistons and would it be worth going to a lower compression piston so that i could add more boost on a supercharger?
2000 Svt
kkm intake w/heat shield, custom MAF,under-drive pulleys,braided brake hoses,carbon fiber brake pads,painted calibers,17x7 borbet t's with g-force tires,bat euro struts,eibach pro-kit,custom burned superchip,sho offroad y-pipe, bassani exhaust with high flow cat,formula one tint,kenwood excelon cd/mp3,mb quart compents w/mtx amp,b & m short shifter, carbon fiber pedals,hyper-bright bulbs,painted oval ring and many mods to come.
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Compression ratio on 98 and 99 SVT is 10:1 while the compression on the 2000 SVT is 10.25:1. You will have a hard time finding other pistons though.
Jim Johnson
98 SVT
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have the stock svt engine with the supercharger and some mods and your looking at 290 hp at the wheels.(The Most)
Now the 3.0 you would have to use lower compression pistons with the supercharger
Chow
1998 SVT #2263 of 6535
chowsvt@msn.com
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Originally posted by Big Jim:
Compression ratio on 98 and 99 SVT is 10:1 while the compression on the 2000 SVT is 10.25:1. You will have a hard time finding other pistons though. The newer V8 SHOs have the same bore as the 2.5L Duratec. Actually alot of the things on 3.4L V8 have the same measurements as the 2.5L Duratec Bore 3.2447 Stroke 3.1299 Bore Spacing: 4.0157 Main Journal Diameter: 2.4795 Rod Journal Diameter: 1.9677 Connecting Rod Length: 5.4370 Crankshaft center line to deck: 8.1890 Compression Distance Piston PIN to top of piston: 1.1811 --Matt
00' SVT Contour, Black and Blue #954 of 2150
Stock....
2003 Red Fire Convertable Cobra due in September...
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i would use 8.5:1 but make sure they don't just mill the top of the piston to lower the compression, that is bad for a s/c car... you want as much material up there as you can get to help with the high heat... i might be able to get you a set of 8.5:1 if you are interested...
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Originally posted by mmars:
The newer V8 SHOs have the same bore as the 2.5L Duratec. Actually alot of the things on 3.4L V8 have the same measurements as the 2.5L Duratec
Bore 3.2447
Stroke 3.1299
Bore Spacing: 4.0157
Main Journal Diameter: 2.4795
Rod Journal Diameter: 1.9677
Connecting Rod Length: 5.4370
Crankshaft center line to deck: 8.1890
Compression Distance Piston PIN to top of piston: 1.1811
--Matt Wow, where did you get those figures? I have been searching for them for a while for a project that I am working on. The Compression distance is from the center of the pin, yes? What is the pin diameter?
"When I take action, I'm not going to fire a $2 million missile at a $10 empty tent and hit a camel in the butt. It's going to be decisive." - President George W. Bush
95 Contour SE ATX V6
"Cracked" Secondaries
DMD Installed
SVT Brakes
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Originally posted by Sandman333:
Wow, where did you get those figures? I have been searching for them for a while for a project that I am working on. The Compression distance is from the center of the pin, yes? What is the pin diameter? They are in the back of the Ford Racing catalog. --Matt
00' SVT Contour, Black and Blue #954 of 2150
Stock....
2003 Red Fire Convertable Cobra due in September...
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Did Ford change the pistons in the 2000 SVT to acheive a higher compression ratio?
98 Black E0 #946 of 6535
Koni struts & Eibach springs
24mm Aussiebar
Pro Flow 75mm MAFS calibrated to KKM filter
Wilwood Brake Kit with cross-drilled rotors
Clutchmaster's Stage 1 Clutch & Fidanza Flywheel
Custom Dual Exhaust with an Xpipe
MSDS Headers
Custom Cold Air Intake with KKM filter
Dyno'd at 177 hp and 156 ft-lbs
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Originally posted by bret:
i would use 8.5:1 but make sure they don't just mill the top of the piston to lower the compression, that is bad for a s/c car... you want as much material up there as you can get to help with the high heat... i might be able to get you a set of 8.5:1 if you are interested... Bret: normally you would be right, but if there is an abundance of material it is ok to machine the face of the piston to lower CR. It gets done in racecars all the time, and I have had a few of them.
Just call me Judge.
People suck.
Life begins at 170mph...until that point it is just boring.....
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Joined: Jun 2000
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Originally posted by bret:
i would use 8.5:1 but make sure they don't just mill the top of the piston to lower the compression, that is bad for a s/c car... you want as much material up there as you can get to help with the high heat... i might be able to get you a set of 8.5:1 if you are interested... Bret: normally you would be right, but if there is an abundance of material it is ok to machine the face of the piston to lower CR. It gets done in racecars all the time, and I have had a few of them.
Just call me Judge.
People suck.
Life begins at 170mph...until that point it is just boring.....
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