Zachary
A supercharged 416 is a great dream, but I wonder if it's practical.
As a street car you have two problems; traction and speed limits.
A 416 with a roots will just annihilate the tires and then it's over.
A 416 will just annihilate the tires and then its over.
A roots on anything will mostly just annihilate the tires and then it's over.
You seeing a pattern here?
Doubling your speed requires 4times the power. That's why fast times need big power.(Fast like 120mph) Harnessing big power on the street is called personal restraint,AKA not flooring it. Where is the fun in that?
A supercharged 416 is great dream, but;
but; a bracket 340engine is killer too.
but; you could build a hot 318 and floor it and still annihilate the tires to 60, no super required.
but; an Eddie headed 11/1-SBM is a kickass NA engine for streetwork. Make it a 360 and a100shot, and you got the track covered too.
but; a turboed teener will do all you ask and has the potential to make great hiway mileage too.
but; mostly, your street-Duster is gonna be traction challenged.
I know you didn't ask my opinion on this kindof thing, but I'm gonna offer it any way;
For fast ET, zero to 60,
you will want to be revved out at 60/65 mph at the top of second.Lets say you really want the 416. Well then, let's use the A500, with ratios of 2.74-1.54-1.00. And let's use a small cam, cuz, well the 416 is not gonna need to rev much to motorvate the Duster. So lets say it peaks at 5200 That would be maybe a 262ish cam.
Ok then 65mph will be about 5400 with 4.10s in second.And 30mph will be about 4400 in first. Yeah she's gonna jump alright. The starter gear will be 2.74 x 4.10 =11.23, so you could probably use the factory TC. And the cruiser would be 4.1 x.68=2.79,so 65=2285 with zero slip. Perfect. Perfect and perfect.
Except traction is still gonna be an issue.
You might as well just use the factory 340, then you can floor it,lol.
Alternatively, you could use the A904 and 4.30s,but that's gonna destroy hiway useage.
Or you could gear it to hit 60 at the top of first and put a screamer cam in it. The math points to 3.23s and the 2.45 low, to hit 6700@65 with 27s, and 5% slip. So a 5700 peak it is and that would be a cam something like a 284 in a 360, or a 292 cam in a 340,or a 300 in a 318. Yeah so then we're looking at TCs now, to cover the bottom-end hole................. For me,in a streeter,those are too much cam. But if you could make that stick,With the right TC, the zero to 60 would be insanely quick, with any of them.
And we haven't even talked manual transmissions yet, which have dynomite ratios.
Nor is the Super on there yet.
To be fair; what will you run with a 416-Supercharged? You were probably thinking of a cam around 225/230@.050,to keep the torque up at low rpm, and let the super take care of the rest. And you were probably thinking of running a 727 and 3.55s right? Well the starter gear is 8.7, so a small TC will get you rolling pretty nice with a 225 cam; say a 2400 to 2800. Now that small cam would normally powerpeak at about 5200NA with a 360, so let's call it 5000 in the 416. So then 60mph will be 6800 in first, or 4000 in second. Neither is optimal but the Super will get you there reasonably briskly,using second.And you'll be cruising home at 65=2867rpm. However,you will have to beware of the guy with a hot 360, and traction, and a don't race a 367/4-speeder with 4.10s.
Why would that be?
Well, he's optimized. His starter is 10.91 and he has any "stall" he wants. He has dial-a-power.And he can adjust it while applying up to full power. And his second is road-ratio of 7.83 so 65= 6350, and he's running a cam/heads that peak at 5800. So he's putting down a lot of average power; a lot. Probably enough to show you taillights. Maybe he has a GVOD,and is splitting it, running 3.23s and a 3.09 low. He'll be hitting 60@5800,and his starter is 9.98. And he'll be cruising home at 65=2035rpm. Watch out for that guy,if he ever finds traction,lol.
The point is this; for a streeter,it's all about hitting the marks with gearing,and having traction; any NA SBM can be fun; Supercharging not required. IMO supercharging a 416-streeter is waaaayoverkill.
The ratio of dollars spent to fun-factor is 2 or 3 times more than what it needs to be.And that's before you factor in parts attrition.
But it's a really great dream.
I have a memory of a 1970 Swinger340 I had in high-school,back in 70/71/72. While all my buddies were slamming money into go-fast stuff. I figured a 340 that could spin the tires thru 3 gears, didn't need more power. So I worked on that. In the end my stock-engine dart only went 14.4@98 in the qtr, but I was the guy to beat,on-the-street. They'd be getting their heads done and camming it and doing all the bolt-ons and then it's off to race AJ. And they always lost. For nearly three years they never figured it out. One guy tracked his Demon at 115 (hesaid; same day I hit 98). I was a little intimidated by that, but on the street he lost anyway. On the street it's not about absolute-power exactly. It's all about hitting the marks and having traction, and lotsa average power.
Average power just means getting the Rs up as quick as possible, and then keeping it on the pipe, for as long as possible. The starter gear gets you there. The optimized second gear keeps you there.And if you're heading to the track, the next gear or two also need to be looked at, and/or matched to the powerband.A streeter can be set up pretty good for the 1/8th, but she'll want a different set-up for the qtr. And if you optimize for the qtr, she won't make a very good streeter.
Yeah I know, a nuther novella by AJ.............................
