/6 build
I am currently building a 71 duster with a 198 slant 6 and 3 on the tree. I am using the slant 6 as a learning project before i put the new engine in during the winter and just want to see what it can do and if it blows up oh well. What I have in mind so far is building a custom intake manifold running EFI from an 84 buick 3.8l. Installing a comp cams cam kit with the following specs:
P/N: K64-241-4
Cam Style Mechanical flat tappet
Basic Operating RPM Range 1,200-5,000
Intake Duration at 050 inch Lift 220
Exhaust Duration at 050 inch Lift 220
Duration at 050 inch Lift 220 int./220 exh.
Advertised Intake Duration 264
Advertised Exhaust Duration 264
Advertised Duration 264 int./264 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.440 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.440 in.
Valve Lift with Factory Rocker Arm Ratio 0.440 int./0.440 exh.
Lobe Separation (degrees) 110
I ordered an MSD 6AL-2 programmable and am going to be running an AEM data logger on the car to learn how different changes affect the car.
I am building a set of step-tubed race headers and am debating on tossing in a garrett GT3076 turbo with an air-air intercooler.
The next thing is should i put a 4 spd transmission in the car?
Does anyone think this is a good build? Any comments or suggestions would be greatly appreciated. Thanks. Also what kind of power would you expect from a build like this? I was thinking of running 8lbs of boost for a little while and then cranking it up slowly until she goes. I'm sure someone on here would be interested in how much boost a stock slant 6 can handle.
What is your goal for this engine in terms of horsepower and what will your goal be in terms of elapsed time and mph for the Duster, once the engine is complete and in the car, running?
Please let us know what you are after with this project, because without a goal in mind, it's impossible to say whether what you have suggested is going to work for you or not.
Once we an idea of your desired finished product and its expected capabilities, it will be a lot easier to evaluate your progress, so far.
For example, is this going to be a low-budget exercise wherein you use a lot of used parts, and have a dollar figure for the engine in the $800-$1,000 range, or will it enjoy a $4,000 cap on parts and machine work?
Can you be happy with a Duster that will run 15-flat quarter miles, or would you rather spend the extra money that could produce 12-second timeslips?
You can build an engine with a 4-bbl carb (or, efi), that is normally-aspirated, with the cam you mentioned, headers, some 11:1 pistons, and big valves in a ported head without breaking the bank, but that engine will only run, probably mid-14-second e.t.'s at best.
But, it will be reasonably priced.
To run some 12 second times, (or quicker) you're probably gonna need some form of power-adder, like a super- or turbo-charger, or N20.
But, it can be done, and with normal, everyday parts that are not hard to find.
It's just more money, that's all..
But, how about letting us know your druthers; you have some good ideas and there are people here on FABO that will gladly help you achieve your goals, once we know what they are.
Just talk to us.... :D
