12.193 @112.27 MPH in Mom's 4150# Brick
Thats SRT- Hemi times. Whats done to that 5.7 ? Congrats as that runs great ! Ron
Crane 216 cam, Mopar Performance heads, Mopar performance headers/cats, stock 6.1 "suitcase" exhaust W/resonators replaced by "Blastin' Bob's" resonated kit, 6.1 intake manifold port matched to the heads W/phenolic adaptors, CMR "Predator" tune & AFE Stage II CAI. That rounds out the engine/PCM part of the equasion
Pro-Torque 2800 Stall convertor, 3:06 SRT differential, (4.32:1 FDR in 3rd gear) 25.7" Mickey Thompson 275/40R 17 Drag radials on `17" X 9 1/2" Centerline "Hammer" forged aluminum wheels. (the short drag radials ups the effective FDR in 3rd gear to 4.67:1 compared to 28" drag radials) M&H 4.50 X 17 26" "Frontrunners" mounted on 17" stock spare wheels W/1.3" adaptors to clear the brake rotors.
Thing is, cam/heads/headers/tuner yield from 100 to 150 RWHP on the 5.7 while similar mods on the 6.1 only yield gains in the 50-75 RWHP range due to the fact that the 6.1 is already "turned up" from the factory. There is about a 25-35 RWHP difference in the end & the 200# or more of additional weight due to the beefier block & other components goes a long way to negating that HP advantage. Right now, of the 4 quickest N/A
stock displacement LX cars (Magnum/300/Charger) on the LXforums database, 3 are 5.7s W/the top 2 spots held by 5.7s. (the top N/A spot is held by a 426 6.1 based stroker)
The aspect I love about the 5.7 Hemi is the road manners it would bring to one of our old muscle cars. It would idle smoothly, have plenty of vaccuum, and be very street worthy which is something you don't always get otherwise.
The Crane 216 W/the 112* LSA was a bit of a challenge in the idle department until the "Predator" tuner came along allowing complete control of A/F & ignition timing. The engine now idles @ 750 RPM W/the slightest hint of some lope. Just enough to tip off someone W/a good ear that something is not OEM.
Street manors are impeccable other than the fact that that the stock OEM replacemnt size 245/55R 18 BFG KDWSs will not allow me to stand on it in low gear W/O going up in smoke. MPG in my mixed rural/small town driving is about 19 MPG, hi-way cruise @ 75-80 MPH is about 23 MPG. drop to the speed limit & it goes up about 2-3 MPG.
If the Mercedes "E" class derived "NAG1" 5 speed auto could be transplanted into the early mopar bodies, (near impossible W/the overbearing computer "HAL") the 1.41:1 reduction 3rd gear would yield a FDR of 4.55 W/a 3.23 axle ratio.
Imagine that W/the 1:1 4th gear & overdrive 5th. A 10 second "A" body that you could drive to the track 4 hours away.
i am so thinking about putting a 5.7 in my dart.
Check out forum member
MomsR/T. He is involved W/Frank's Racing. They have been on the leading edge of developement of the new Hemi performance cams/heads & are working on "A" body tarnsplant kits.
If anyone is interested I can post some PIX, dyno charts etc. from my home computer.
I am @ work now & can not cut & paste on this computer.
