another boosted slant : D opinons plz
You do NOT need an expensive 8.75" A-body rear end, with the drop-out center section, though.
I'll explain why in my next note.
Here's the "next note."
Turbo motors (at least, the slant six variety) don't NEED to turn many RPM's to make good power. Your 5,000 RPM limit sounds very reasonable, and you'll be surprised at how fast your car in, without winding it up, like an eight-day clock!
Ryan Peterson's '66 Valiant goes 127 MPH in the quarter mile with a turbo /6, and he never takes it past 5,500.
They (/6's) just don't like or need to be wound tight.
That has a positive effect on the kind of rear end you can choose for your car.
Since you're not going to be needing to change gear sets in the rear end, a drop-out center section suddenly becomes unnecessary, so what are your options? The usual and most practical route seeems to be to acquire a conplete, drum-to-drum 8.25" rear end out of an Aspen/Volare from a junkyard. It will be geared, most likely, in the mid-to-high 2's, which is perfect for your car. Those gears will give you comfortable street and highway driveabilty, and won't hurt your drag strip performance (or, street acceleration, if you don't race) at all. The tall gears will also probably enhance your gas mileage.
I think if you decide to do this, you should forget about big valves for the head, and milling it, for sure.
You're going to save a of of money because of the things you WON'T have to buy, like headers, an 8.75" rear end, aftermarket intake manifold, and a high stall converter.
You WILL have to spend some on cold-side plumbing, and that alky injector. I just bought the cheapest one Snowperformace makes for our car, and it was $300.00, but it's a necessity.
You MAY need to get your driveshaft shortened for that 8.25" rear end, but possibly not.
I, frankly, don't know...
Maybe someone else can help us out on that. Anybody????
Ball park figures are never very accurate, but there's a computer pprogram online at that has some drag racing programs that seem to be reasonably accurate. It's at:
http://www.wallaceracing.com/et-hp-mph.php
That program says that with 200 horsepower, your car (at 3,400 pounds) should turn an e.t. of 14.98 at 89-MPH.
With 300 HP, that same weight car (3,400) should run about 13-flat at 104-MPH, trap speed.
My uneducated guess, would be that your car, with 10 pounds of boost and, built as described here, should run in the mid-14's, which would be a good race for a stock 340-powered V8, car of the same weight.
Just my 2-cents.
To go appreciably faster than that, will take some expensive upgrades in the interest of long-term reliability.
You can have a lot of fun with a mid-14-second car.... especially a six cylinder one... LOL!
Good luck with this and ask away; the only stupid question is the one you DON'T ask!!! :)
