525 sc ?
10-29-2015 | 01:27 PM
#32
Charter Member # 55
Joined: Oct 2000
Posts: 20,276
Likes: 2,515
From: Omaha/LOTO
I know this thread is older, but MildThunder, i am about to do the exact builds you were just describing here. I have 365 mag motors, stock except for Crane gold roller rockers & MSD distributers. Im about to get a set of 525sc blowers, and they come with a set of fresh 1050 Williams carbs, but i was wanting to at least throw a cam in them while i have them apart, and was also gonna stay flat tappet for cost purposes.... I have always had good luck with Comp so i was gonna either do a grind from their Xtreme Marine line, or one of their Blower cams. Both are right around 0.570ish lift, but the Blower cam is on a 114lsa versus the Xtreme Marine 112, would either of these be similar to the Crane that your buddy used? I'm running stock manifolds for the time being so I'm thinking 114lsa may be better? (Do NOT want any reversion issues). Didn't think i could get as highs 590hp but after reading your post I'm awfully impressed and kinda pumped to try it out!
The stock 454mag exhaust will have reversion issues.
10-29-2015 | 04:41 PM
#35
Platinum Member
Joined: Feb 2001
Posts: 4,303
Likes: 1,459
From: Virginia Beach
Merc 496 aluminum manifolds and risers. If you're going with a reasonable cam, the risers will work well. I'm using a 525 EFI cam in my blown 454, and I don't trust the risers in regard to reversion for my setup.
I picked up a set of Stainless Marines so these will be going up for sale. Anyway, just putting this all out there in case you could use it.
I picked up a set of Stainless Marines so these will be going up for sale. Anyway, just putting this all out there in case you could use it.
10-29-2015 | 06:27 PM
#36
Registered
Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
You could always extend the risers, to fully dry tails all the way thru the transom. We've done that a few times. I see no reason to run wet exhaust unless silent choice these days. Fully jacketed tails, with water dumping at the very end, works great, and if too loud, clamp on mufflers work as well with that setup.
10-29-2015 | 08:37 PM
#37
Platinum Member
Joined: Feb 2001
Posts: 4,303
Likes: 1,459
From: Virginia Beach
That was my plan originally (I had about a foot of stainless welded to the risers), but the angles wouldn't work right with regard to the transom. The Stainless Marine exhaust fixes that. The risers will run dry to the tips.
