80Stang
Well-known member
We dynoed a 203cid today for my customer. This is a late block with late E0 production iron head. The head is the one I ported for my own buildups a few years ago (GEN2 engine, specs at my website), except I changed the back-cut exhaust valves to un-cut new ones. The head and block were milled to achieve a 10.3 static CR with 2.3L HSC pistons and a very tight squench.
203cid (overbore +.030)
CSC/CI 274/110 cam
Holley 350 2V (optimum jets: 58)
CI "vintage" dual out header
Duraspark + MSD ignition
176hp @ 5500
245Nm @ 5000
The torque curve is very flat with 211Nm at 2000 (we measured from 2000 to 5600), which was the lowest value.
http://www.tuumacid.com/pieces/L6dyno1.jpg
http://www.tuumacid.com/pieces/L6dyno2.jpg
Got videos but they are some 15-25MB each...
203cid (overbore +.030)
CSC/CI 274/110 cam
Holley 350 2V (optimum jets: 58)
CI "vintage" dual out header
Duraspark + MSD ignition
176hp @ 5500
245Nm @ 5000
The torque curve is very flat with 211Nm at 2000 (we measured from 2000 to 5600), which was the lowest value.
http://www.tuumacid.com/pieces/L6dyno1.jpg
http://www.tuumacid.com/pieces/L6dyno2.jpg
Got videos but they are some 15-25MB each...