Four bolt mains that are cross bolted, which will get ARP studs. So that's why we will be using an iron block six liter for our foundation because you can't go wrong. The LS platform is the new standard of high performance for us gearheads. I'm just impressed at how nice this thing is. (Frankie)> How much you guys trying to make? (Jeremy)> We really haven't talked too much about that have we? (Jimmy)> No, I think 500 to 600 range would be pretty much. (Frankie)> What do you want to use then? (Jeremy)> We've talked about this a lot and the easiest route for us to go and the easiest way I think for us to build some power is just put an LS in it. (Frankie)> You want to use this? (Jeremy)> No that's where you guys come in. (Frankie)> So you're talking autocross stuff? (Jimmy)> Yeah, hammer on it. (Jeremy)> And again it's gonna be a driver too. There's a lot of outlets that you can go to compete, and we want to make this thing stick to the ground and go as fast as it can doing it. That's kinda the hot thing right now it seems like. (Jeremy)> We drove it here about 200 miles right Jimmy? (Jimmy)> It's impressive actually. (Frankie)> You drove it in, not pushed it. (Pat)> This has even custom wiring, but if it runs and it came in here under its own power that's a huge deal. (Pat)> This is the important part right here cause I already know what's under there. That's pretty sweet! (Pat)> That's actually clean! (Frankie)> Sweet ride huh? (Pat)> I'll tell you what. So we met up with the guys from Carcass to check it out. Before we can start building the engine we need to know what it's for. This means we got to do some really cool stuff all the way from a 258 inline six, to an aluminum headed AMC 304, to a high tech supercharged Coyote that made 1,000 horse on the dyno. (Frankie)> Recently we've been doing a lot of projects for the other shops in the building. The amazing thing is I can get over 19 mpg cruising on the freeway with the AC on and drive it anywhere.(Pat)> You're watching Powernation! (Pat)> So what are we gonna do? (Frankie)> We can do a 5.3 or a 6.0, or we just flip for it. A lot of fun to drive, since it is in a grandma Nova it has surprised quite a few people. Computer estimates are around 450 hp and close to 500 lb ft of torque with a fairly flat curve. The engine is still pulling hard at 6000 rpm's but I try to keep it under 5500 most of the time. The most expensive part of the whole engine was the heads, but they sure help make the power. Runs on pump premium and with 50° of total timing there is no detonation. 010" piston heightġ0.25:1 compression ratio with a quench area of about. Speed Pro H601P pistons (These are dished)Ĥ bolt block bored. Nothing needed to be clearanced, just normal machine work. Built it for making all of the power under 6000 rpm's to save money. Here is what I did, no plans on track time, just wanted a reliable engine with plenty of power. Phil are you just wanting a street only engine? If so it can be done for low buck. Should be an easy 550 HP piece that will be anvil reliable and need nothing more than a quality synthetic oil change at regular intervals. Vic Jr intake with port matching and minor plenum blending Go for a hyd roller cam, you're specs will be fine, although I prefer a tighter lobe separation. Go with the AFR 195's, they will easily eclipse your HP target, and they have the correct springs for a hyd roller cam. (Wiseco/SRP would work as well, but Mahle's use a thin metric ring pack that eliminate needing oil ring spacer rails, plus they weight NOTHING) It's a MUCH more durable piece, will cost you nearly the same as all the fluff and buff BS to get a factory 400 block to "close" to the strength of a Dart block.īuy a Scat forged crank and Scat 6" I beam rods with the 7/16 capscrews, and top it off with Mahle dished forged pistons. Since you're starting from scratch, buy a Dart SHP block. Take it from a guy who owns a machine shop and has done one for himself (current 406) installing splayed caps in a 2 bolt block, don't waste your time. I later whittled the times down to 10.96 121.6 at a sea level track. The first time out it ran 12.1 112 at my local 2200' elevation track with 3.42 gears/5xxx stall. This combo ran with reduced timing on premium on the street, and was fed 50/50 with race gas for the track. 050 solid flat tappet cam, roller rockers Stock 350 rods, later replaced by Scat I beams (wasn't necessary)Ĭomp 259/266. GM iron Bowtie heads, copious hours of portwork, easily duplicated by buying a set of AFR 195's.įorged flat top pistons, zero deck, 11.4:1 My first 408 was very streetable, in fact it was my daily driver during the summer.
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