95teetee
03-22-2009, 09:55 AM
went with my brother yesterday while he was getting his engine dynoed- it's a 340, fairly mild- cammed up a bit, Edelbrock single-plane mani, 650 Holley, forged everything, with h-beam rods. This is basically the initial startup and first few tuning runs, still a ways to go.
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0001.jpg
the reason for the cast iron exhaust manifolds is that the engine's being built for a turbo setup- so it's also only 9:1 instead of the stock 10.5:1.
here is the comparison of a couple pulls- just trying different jets out- both about 315 peak torque and 270-275 HP (stock rating was 275 horse). We also tried an 800 edelbrock carb, but that didn't really change anything- it's not running short on fuel...
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0021.jpg
kept dropping off top-end because as the tuner, Greg, put it "it's constipated".
Greg talked my bro into putting headers on it, despite the fact that he didn't want to because of the impending turbo...
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0039.jpg
here's a comparison of headers to manifolds-
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0043.jpg
from 295 ft/lbs and 274 HP to 343/318.
I thought this was the car he's building it for, turns out it's one of his other barracudas- same idea though...the calculations put the setup @ about 12.6 in the quarter with the 31X horsepower number
http://i11.photobucket.com/albums/a182/hitman357/dyno/cuda.jpg
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0001.jpg
the reason for the cast iron exhaust manifolds is that the engine's being built for a turbo setup- so it's also only 9:1 instead of the stock 10.5:1.
here is the comparison of a couple pulls- just trying different jets out- both about 315 peak torque and 270-275 HP (stock rating was 275 horse). We also tried an 800 edelbrock carb, but that didn't really change anything- it's not running short on fuel...
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0021.jpg
kept dropping off top-end because as the tuner, Greg, put it "it's constipated".
Greg talked my bro into putting headers on it, despite the fact that he didn't want to because of the impending turbo...
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0039.jpg
here's a comparison of headers to manifolds-
http://i11.photobucket.com/albums/a182/hitman357/dyno/DSC_0043.jpg
from 295 ft/lbs and 274 HP to 343/318.
I thought this was the car he's building it for, turns out it's one of his other barracudas- same idea though...the calculations put the setup @ about 12.6 in the quarter with the 31X horsepower number
http://i11.photobucket.com/albums/a182/hitman357/dyno/cuda.jpg