1970 Duster AlterKtion, 4 Link, LS/T56/Turbo and Minitub

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More progress this weekend and some set backs >.<

For starters SHE RUNS!!





EDIT! Dyno date is scheduled! March 4th!

Went to go put the front end back on anddddd the grill hit the intercooler. I swore I had space so I never even held it up to verify. Wicked rookie mistake. Sooo had to go back and move the intercooler down about 3 inches. Had some old powerstroke intercooler top brackets I cut down and welded up to hold the bottom. Worked pretty well! Dont mind the mess. The garage is an absolute DISASTER being the final push to get the car done for the Dyno. Its giving me anxiety to work in right now haha.
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Rolled the car out this weekend too!!
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The rear of the car sits quite a bit lower just from my guessing of the coilovers. I like that height so I started lowering the front to match. Then realized the oil pan is way to close to the ground. After further inspection the pan summit sells as a "CAR" pan was actually and TRUCK pan!! Grrrr so I ordered a car pan thats almost 3" more clearance.
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Got the new oil pan on (much better!) and the rear shocks moved up a hole so it sits closer to level. The front still needs to come down a little. Also changed my 1" clutch master out for my 3/4" bore size master and the clutch is MUCH easier now. Still releases way off the floor too.

Found out that the cheap walmart -25 wiper fluid is about 38% methanol and is like $2. So while its "cold" down here in NC I stocked up on some.
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Also I had put a new fuel sending unit in the tank and I wanted to make sure that wasnt going to leak the day I head to the dyno and get fuel, so I filled up the tank to check. A little redneck ingenuity lmao
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LASTLY! Tomorrow is the big dyno day! We'll see what she does and hopefully no issues!
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Great progress. I’m interested to see how it does on the Dyno. What boost levels are you looking at running?
 
You are doing a great job on it. Trying to use it for some inspiration to get something done on mine.
 
What your doing is way above my skill level and need/want in a vehicle. But it is pretty dang cool! always good to see what everyone is doing to potentially get ideas for what ever the future holds!
 
Don’t forget we need video of the car on the dyno. Car looks great.
 
black954 said:
Great progress. I’m interested to see how it does on the Dyno. What boost levels are you looking at running?
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Whatever it takes to break 600WHP lol. From watching sloppymechanics youtube page (if you dont know it Matt does some amazing things with junkyard motors and low budget), it seems that high boost even into the 20psi range isnt so bad as long as your timing is on the retarded side. Once you start bumping timing up then you have to bring boost back down. So being a street car I want a happy medium. The original goal was 16 to 18psi.
 
TT5.9mag said:
Don’t forget we need video of the car on the dyno. Car looks great.
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I havent forgot! I'd be lying if I said I wasnt nervous though!

toplscuda said:
You are doing a great job on it. Trying to use it for some inspiration to get something done on mine.
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Thanks! You're doing the Hemi swap right? Whats left?

carfreak6970 said:
What your doing is way above my skill level and need/want in a vehicle. But it is pretty dang cool! always good to see what everyone is doing to potentially get ideas for what ever the future holds!
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Thanks! Yeah its way more power than I need for anything but I WANT to hurt peoples feelings at redlights/on the highway in $80,000 corvettes and stuff haha.
 
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[QUOTE="70DusterDev, Thanks! You're doing the Hemi swap right? Whats left?[/QUOTE]

Yes, have the 6.1 mounted up to the alterkation with a 4L60e behind it sitting under a shelf at work. Quite a bit left car wise before it goes in. Need to finish up the bodywork. It took me a long time to get up the nerve to do the quarters myself. Have most of the undercarriage cleaned up. Once I finish that I want to get it down on wheels and make sure I get all the body panels lined up. I have been spending most of my time lately renovating the house so I cannot even walk in the garage right now
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toplscuda said:
[QUOTE="70DusterDev, Thanks! You're doing the Hemi swap right? Whats left?
Click to expand...

Yes, have the 6.1 mounted up to the alterkation with a 4L60e behind it sitting under a shelf at work. Quite a bit left car wise before it goes in. Need to finish up the bodywork. It took me a long time to get up the nerve to do the quarters myself. Have most of the undercarriage cleaned up. Once I finish that I want to get it down on wheels and make sure I get all the body panels lined up. I have been spending most of my time lately renovating the house so I cannot even walk in the garage right now
View attachment 1715480995[/QUOTE]

Always tough when life gets in the way! I know what you mean though with the quarters. My dad and I did mine with a friend of his who he use to do body work with way back in the day. Was the most amount of work I'd ever done on one vehicle time wise. We had over 100 hours just wet sanding before paint lol never mind the fitting and finish work of the 2 full quarter .
 
Okay SO first time ever to a dyno was pretty exciting. It didnt hit the numbers I was hoping it would but we have some ideas why and things to try to improve. Overall I'm pretty happy with the results and the guy who runs the dyno Pete said for my first trip there and first day tuning/working bugs out the car did well.
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We hit a hard wall at about 530WHP or so. We had plenty of fuel and all 3 springs in the wastegate with the boost controller maxed out. I said lets pull the air filter and see what it does for us. That air filter robbed about 20 horse and got us up to 550WHP. So Pete suggested pulling the exhaust from the downpipe because he had suspicions of back pressure issues. After we did THAT it got us up to 584WHP at 21psi. But he still thinks my 3" downpipe is robbing a bit of boost and power because it wont make more than 21. So I'm gonna make a 4" downpipe that splits to my 3" duels (only did a single for the dyno) and see if that gets me above 600WHP which was the goal.

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Once we got to the 580 area we fooled with a few things but your advice @TT5.9mag stuck in my head of don't chase a number so I said okay lets leave it there. So Pete played with some timing and dropped a few degrees only losing 3 or 4 WHP and we left it at that.


 
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Awesome. Sounds to me like you are out of turbo. Tell me the specs on it again. I’m glad you got some hard data about the air filter, I’ve never liked those. The downpipe I would say is not hurting you as much as you might think. The turbine is probably a little small for your engine size. But, and this is a big “but” you now have 580rwhp go have fun with it. Drive the crap out of it and see if you need more. Then change things if you do. I’m betting it’ll be enough to keep you happy for a while.
 
Yeah, Pete said the same thing. That there were a few other things that I could do to bring the power up but its not worth dumping money into it for a street car because its just going to spin all the time anyways. So, I was going to try a different downpipe just to see if that changed anything but other than that basically run it!

Idk Matt Happel has been making well into the 7 and 800WHP ranges with the same 78/75 turbo. Someone on the Sloppy facebook page said he has the same setup as mine and made 602 with only 14psi lol. So something just seems odd.
 
Yea I agree the turbo can make more on a different combo. A good friend of mine is running that exact same vs7875 billet wheel turbo on a k24 Honda in a pinto wagon and makes well north of 800. But it may be not enough turbine for your cubic inches and fall off fast as backpressure rises. It’s all about efficiency in a specific range. I do agree with you that at 21 pounds you should be making more power but I’m guessing heat and backpressure are your enemies. As they always are. Was Pete monitoring exhaust backpressure or intake temp?
 
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Only photo I have of the car in mock-up. But it made 820 to the wheels if I remember correctly.
 
Yea e85 makes things much easier. You need a lot of injector and a lot of fuel pump. With Holley hp efi you should have air intake temp numbers.
 
Okay, well something else that is odd, is that we had to run all THREE springs in the WG WITH the boost controller to even get to 21psi. And the boost controller was acting really odd. Basically over 40% all the way to 100% was the same results in boost.
 
Not bad at all for a new setup, that’s near 700 crank hp and I believe the others are correct, you’ll be fighting for traction at 580rwhp. Hopefully your IATs stay reasonable at that boost level this summer
 
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