hemichuck
Well-Known Member
I’ve got a 360 long block that’s built but never ran yet, it’s got the Mopar Performance 509/292 can in it. I was wondering if it would work on a supercharged application (B&M blower) or should I change to another grind
Good point but possibly the horse before the cart here.What does the rest of the combination consist of? If it actually has enough compression for the engine to properly work with that cam (at least 10.5:1, maybe even more!), then it’s not going to work too well with a blower.
Well, there are ways to do it, but it requires something more than most typical 360 long blocks floating around out there....
Many supercharged or big nitrous hit engines make the headers glow, but I bet that cam would make them melt out from under the car..76* of overlap on the 108 version is a long long time to be blowing gas and air straight across the piston and out into the header pipes. What if it catches fire in there?
I’ve got a 360 long block that’s built but never ran yet, it’s got the Mopar Performance 509/292 can in it. I was wondering if it would work on a supercharged application (B&M blower) or should I change to another grind
It already happens. It doesn’t need to be supercharged to do that. Baseless worry....76* of overlap on the 108 version is a long long time to be blowing gas and air straight across the piston and out into the header pipes. What if it catches fire in there?
Never happenMany supercharged or big nitrous hit engines make the headers glow, but I bet that cam would make them melt out from under the car..
IF that is a crate engine, It ain’t a MoPar crate engine.Rumblefish, I don’t know which centerline it is, it’s the one that came in the short block. I’ve got the actual B&M cam that they sold with the blowers, it’s like 441 lift with 276 duration, pretty much equivalent to a 68- 340 4 speed cam. I thought it was pretty mild. I might just pop the 509 out and use the B&M cam, it’s going in my sons Dakota convertible.
The early crate engines were the 360/300 & the 360/360. I forget what the 300/360 had for a cam. But the 360/360 -*IIRC*- used the MP Purple 284/.484 Hyd. cam. I gave away all my old books to friends and old club members. So I cannot check for the particulars.I think they put that 292 cam in the 380 hp crate motors ..... which were independently tested at ~400hp,IIRC
Almost right; the 380s had a 288/292/108 and 9/1 SCR
I’m starting to rethink this whole project about now. The 360 crate motor is a 509/292 flat tappet and since the motor is most of the way together I might just go ahead and drop it in my old Duster bracket car (naturally aspirated) and use one of my magnum based 408 short blocks to build my son a truck motor. I have 2 408 Magnum short blocks that were built for a supercharger so the only obstacle I have to get around is a magnum style head with LA intake bolt pattern. I’ve got some EQ heads that’ll solve that problem. I’ve got 4 or 5 Magnum roller cams that have better profiles for blowers. Plus the Magnum short blocks are forged piston and cranks, wasn’t certain about supercharging a crate motor with Hypereutectic pistons anyway.IF that is a crate engine, It ain’t a MoPar crate engine.
I’d run the other cam in a second flat. The 292 Purple cam is more than likely to be on the 108.
The early crate engines were the 360/300 & the 360/360. I forget what the 300/360 had for a cam. But the 360/360 -*IIRC*- used the MP Purple 284/.484 Hyd. cam. I gave away all my old books to friends and old club members. So I cannot check for the particulars.
That cam you list is for the roller cam 360/380 crate engine. I’m not 100% sure they used the Hyd. 292.
It is a good bracket cam. Very basic, performs well, even with stock heads though a good gasket matching and more importantly a bowl porting really help that low .509 lift cam to go. The cam seems to like a good bit of compression. But bad for adding pressure. If it was his only cam and was ready to run I’d just say use it, or, IMO, better yet, sell it and roll the money over into a better cam.
I still think the MP Purple cams are good for brackets. Not a big fan of “that” one in the street. BTDT, not thrilling unless it was at WOT. Even worse in a heavy E body.
I like your thinking....I’m starting to rethink this whole project about now. The 360 crate motor is a 509/292 flat tappet and since the motor is most of the way together I might just go ahead and drop it in my old Duster bracket car (naturally aspirated) and use one of my magnum based 408 short blocks to build my son a truck motor. I have 2 408 Magnum short blocks that were built for a supercharger so the only obstacle I have to get around is a magnum style head with LA intake bolt pattern. I’ve got some EQ heads that’ll solve that problem. I’ve got 4 or 5 Magnum roller cams that have better profiles for blowers. Plus the Magnum short blocks are forged piston and cranks, wasn’t certain about supercharging a crate motor with Hypereutectic pistons anyway.
Probably 9.5 to 1I like your thinking....
It’ll be detonation that will kill the hypers, not the boost pressure.
It was asked before, but, what is that 360’s compression ratio?
^^^BEST OPTION YET!^^^ That’s perfect, just follow the advice on the drive pulley and belt and make it breathe. What are your specs on your custom blown magnum cam grinds?