Truckasaurus
Full Access Member
Hi all.
As some of you may know, I have a Livernois 6.6 on the way. My truck already has full exhaust system, a Gen 3 Whipple system, upgraded coolers, built transmission, driveshaft, brakes, etc. I have been running a 3.25" pulley and 60 lb/hr fuel injectors. Also an 8 rib drive system with a standard size ATI damper. Making over 570 whp with a basic Whipple canned tune on heavy 37s. Planning to upgrade injectors and fuel pump when the 6.6 goes in.
Trying to decide what belt length and pulley size to run to make max power on pump gas. I am 99% sure but will confirm that I have a K081243 (124.3") belt on the truck now. Open minded to running the OD balancer if that makes sense, just not sure if that is going to be any harder on the power steering pump? I am planning to wind this thing out to however high it will go before running out of air. Perhaps 6600 RPM or so.
Given that the 6.6 is only 5% larger than the 6.2 and also has lower compression, I expect that any real power gains are going to need to come from boost/timing increases that the lower compression and coated pistons will tolerate. With the bigger cams and ported heads, I also expect that there is room for a significant decrease in pulley size, I am just not sure how much it will take on pump gas.
By the way, I plan to run the current 3.25" pulley and a "break in" tune for a month or so before turning the wick up so no rush on this. Motor is still a couple weeks out and I'm also waiting for a Gen 4 head unit in Ford Racing blue from Whipple. I was lucky enough to score a set of those valve covers a few years ago and have been waiting for an excuse to install them.
@MTF any thoughts?
Prior point of reference: https://www.fordraptorforum.com/threads/custom-built-super-charged-raptor.32584/page-14#post-658772
Wild card: I am seriously tempted to ditch the Whipple and move to the Hellion system. I have heard these can be difficult to tune but I am working with a tuner who has significant experience with forced induction Ford trucks.
As some of you may know, I have a Livernois 6.6 on the way. My truck already has full exhaust system, a Gen 3 Whipple system, upgraded coolers, built transmission, driveshaft, brakes, etc. I have been running a 3.25" pulley and 60 lb/hr fuel injectors. Also an 8 rib drive system with a standard size ATI damper. Making over 570 whp with a basic Whipple canned tune on heavy 37s. Planning to upgrade injectors and fuel pump when the 6.6 goes in.
Trying to decide what belt length and pulley size to run to make max power on pump gas. I am 99% sure but will confirm that I have a K081243 (124.3") belt on the truck now. Open minded to running the OD balancer if that makes sense, just not sure if that is going to be any harder on the power steering pump? I am planning to wind this thing out to however high it will go before running out of air. Perhaps 6600 RPM or so.
Given that the 6.6 is only 5% larger than the 6.2 and also has lower compression, I expect that any real power gains are going to need to come from boost/timing increases that the lower compression and coated pistons will tolerate. With the bigger cams and ported heads, I also expect that there is room for a significant decrease in pulley size, I am just not sure how much it will take on pump gas.
By the way, I plan to run the current 3.25" pulley and a "break in" tune for a month or so before turning the wick up so no rush on this. Motor is still a couple weeks out and I'm also waiting for a Gen 4 head unit in Ford Racing blue from Whipple. I was lucky enough to score a set of those valve covers a few years ago and have been waiting for an excuse to install them.
@MTF any thoughts?
Prior point of reference: https://www.fordraptorforum.com/threads/custom-built-super-charged-raptor.32584/page-14#post-658772
Wild card: I am seriously tempted to ditch the Whipple and move to the Hellion system. I have heard these can be difficult to tune but I am working with a tuner who has significant experience with forced induction Ford trucks.
