Any dyno or track times with a 74mm pulley
Was thinking of a huge HE, 77mm or 74mm pulley, belt wrap kit, 82mm TB, Tc tune and maybe just some drop in K&N filters.
I saw that DTK has a sale on thier dtk650 kit, so their 650bhp kit. They claim these numbers with a 74mm clutched pulley, 82mm tb, trans and ecu tune, bwk, and a big HE with no trunk tank.
Has anyone dyno'd their 74mm pulley? With 20% drivetrain Id imagine about 520whp.
Alex
I don't know how much more boost the 74mm gives, but ~25hp seems reasonable. With that setup on drag radials you could probably run something like 11.10 @ 123 in the quarter, assuming a density altitude of 0 ft.
74 is a pretty small pulley and you'd want to have your cooling sorted. If you had low ambients already and just the occasional pull you would likely be okay.
A set of 550s wouldn't hurt either
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I have a 77mm clutched pulley and everything else you're talking about having except from the throttle body upgrade and I am still getting a little bit of heat soak (minimal) after a few hard pulls. Unless you're getting a trunk/engine bay tank or meth I would not recommend going smaller. Especially if the bigger throttle body adds more heat? I'm not sure on that one.
Also I hear that the equivalent crank pulley (180mm for 77mm) gives more torque than supercharger pulley so you may want to think about that option.
I have a 77mm clutched pulley and everything else you're talking about having except from the throttle body upgrade and I am still getting a little bit of heat soak (minimal) after a few hard pulls. Unless you're getting a trunk/engine bay tank or meth I would not recommend going smaller. Especially if the bigger throttle body adds more heat? I'm not sure on that one.
Also I hear that the equivalent crank pulley (180mm for 77mm) gives more torque than supercharger pulley so you may want to think about that option.
I agree Longtubes are better then mid-length headers.









