I'm building a 427 small block Ford with forged Cali's crank with extra counterweight and aluminum rods grp with good internals and looking to keep it under 8000 RPM it will be 3200 lb s197 body back by Turbo 400 and Moser M9 axle. EFI system is a Holley Dominator setup and the car will run on either q16 or methanol. I'm looking at twin turbos and looking to reach goals of 2000 . Below is horsepower or more. The cylinder heads are the brand new Hemi hammerhead Ford heads which flow and access of 470 CFM on the intake at one inch lift and roughly 350 on the exhaust. The heads flow very well even at .750 lift roughly around 450 on the intake 300 on the exhaust. So with these heads flowing very well and being a Hemi style heads it will be very interesting versus a conventional SC1 or canted valve heads. My thoughts were 7675 Gen 2 or 7685 Gen 2 turbos but I'm curious to wonder how much the Gen 2 85 mm turbine well cause lag versus the 75. And I'm even curious to see if a 7675 gen 2 will even produce 2000 horsepower as a pair. Attached below is flow chart.
Tubbedstangeater
Sbf 427 twin turbo build looking for turbo recommendations.
I'm building a 427 small block Ford with forged Cali's crank with extra counterweight and aluminum rods grp with good internals and looking to keep it under 8000 RPM it will be 3200 lb s197 body back by Turbo 400 and Moser M9 axle. EFI system is a Holley Dominator setup and the car will run on either q16 or methanol. I'm looking at twin turbos and looking to reach goals of 2000 . Below is horsepower or more. The cylinder heads are the brand new Hemi hammerhead Ford heads which flow and access of 470 CFM on the intake at one inch lift and roughly 350 on the exhaust. The heads flow very well even at .750 lift roughly around 450 on the intake 300 on the exhaust. So with these heads flowing very well and being a Hemi style heads it will be very interesting versus a conventional SC1 or canted valve heads. My thoughts were 7675 Gen 2 or 7685 Gen 2 turbos but I'm curious to wonder how much the Gen 2 85 mm turbine well cause lag versus the 75. And I'm even curious to see if a 7675 gen 2 will even produce 2000 horsepower as a pair. Attached below is flow chart.
Attachments
Ya i thought about the batmowheel 83s. They made 2600hp on a flywheel dyno on 32lb on sc1 heads
Has anyone tried the new tct bullseye turbos yet? I was specd for a 75 87 with a 1.0 ar. Said a pair should be good for 2000 rwhp. The 72 87 would just be shy. Does this sound right?
I have a TCT in my car, single turbo and small cube motor, been 8.18@169 with a shitty 1.33 60 @ 3400lbs weight. Look up Pinky Drag Week, Cal Hayward runs twin 83s on his 427, he's been 7.2x@191 with out pushing them too hard, I believe he is at 3400 plus race weight too.
I have a pair of VERY bad ass custom built 72s built by Forced inductions that would likely be very well suited for your build. I ran them on the following:
442" LSX
3450 lbs
32 psi
4.48@163 mph on a 275.
Might be looking to sell them, PM me for more info!
442" LSX
3450 lbs
32 psi
4.48@163 mph on a 275.
Might be looking to sell them, PM me for more info!
I have run the 83 as well as the 87mm turbine and the bigger engines pick up big time from the 96mm turbine wheel like my current turbos.
I have looked at those heads at PRI show the last couple years. Probably going to need a steel exhaust rocker at that power level. I would run fuel hoops, Clark copper gaskets and tool steel studs on a 10 bolt head no matter what it's made from. Keep us posted on your progress, awesome build.
I'd go with the 7685 on that big of an engine. Regardless, both of the turbos are very capable of making close to or more than that much power.
Hell I went old school on my 400ci and went twin 4788's from everything I've read they worked great on the size engine
I've made 2200rwhp on 402cuin 18* SBC running twin 80mm Bullseye Batmo's with 96mm turbine wheels and their 1.30 A/R SS v-band exhaust housings. This was on pretty soft tune-up and close to 1:1 on back pressure/boost pressure.
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