Look what I found in the pile of misfit parts....

It's a 60 trim turbo that's fully rebuilt and was going to be for a 25psi DOHC 4cly. It's wrong for a V8 but that's for a "performance" V8...

What do you think my 351w HO would make of it?

I'd have to fab something up for pipes - not too big of a problem. I'd also have to figure out a way to plumb it into the intake. That's where I need to do some research... A nice turbo carb would be wonderful but not what I'm thinking of.

Idea's? Suggestions?

 

I actually stand corrected... It's wrong for a V8 if you're thinking 25psi... At 10psi, 5200 RPM redline, 4200 RPM peak power.... Well look for yourselves...



Do you think a stock 351w HO would live with 10psi of boost?

EDIT: In case you've never read a turbo chart the center 'circle' is the most efficient for the turbo. Each ring outside is less efficient.

 

Duh? Would it "live" with 10 psi boost? It lives with 0 boost today, so it'll live with 10. Back in the day Mazda was selling the Miata in other countries with a mild turbo and giving it a warranty. IIRC, they came with about 5 psi boost and had a significant bump in the power. So a 10 psi boost would be quite beneficial.

 

...cool.

 

Ford was kind enough to include turbo friendly low compression pistons for me already...

I know the mustangs of that era were forged, are the 351w HO's forged as well?

 

Let me rethink my response. Now that I look back at your question it appears you are asking if the 351HO would not grenade with 10 psi of boost. Right? If so, it is hard to tell from here as it depends a bunch on what shape the bottom end is in and what timing and air/fuel ratio you use. I agree that Ford kindly gave you low compression pistons to use, but doubt they are forged or even hypereutectic. So, you will have to take it easy on the timing and provide plenty of fuel to ensure things stay cool and don't detonate. If you do then I'd think it would "live" at 10 psi for a reasonable time.

 

You're looking at a potential headache to make work, but if you're willing to do it, it can work out great as far as power goes.

You'll have to look at is the carburetor. It will have to be modified so that it runs with a blow-through setup, which is very finicky and hard to do. Fuel injection works best with a turbo.

Then, you'll want to look at the boost and the timing. 10 PSI might be pushing your limit. That's right on the edge for your old head gaskets. It'll run fine with the cast pistons, but if it starts pinging, you can be in for a world of hurt. This is part of the reason why forged pistons are used in boosted applications. You'll also want to play with the timing curve and initial timing, and look into running higher octane fuel. You can run on E85 and have excellent results, that I've heard, and will be able to push your limits on boost.

An intercooler is a MUST! Anytime air is compressed, it generates heat, and a hot air charge is less dense, which means less power, and is also prone to pinging.

It will be a LOT of work to make run correctly. But when you get it right, you won't want to go back.

 

That's the conclusion that I'm coming to. I have just about everthing I need to go EFI pretty easy. I have a MegaSquirt 3 computer, it's setup for a Dodge 2.4 DIS ignition right now but I could do a little reconfiguring for DSII or TFI, which ever one I wanted. I probably could to COP but I'd have to look into using the TFI dizzy as a crank/cam sensor like the later trucks.

I have a GT40 lower from a lightning and a Mountaineer upper and the MS3 is a SD system that uses a wideband O2 for on the fly tuning ability... It's got a 4-bar map so I can add fuel at the injectors and not even worry about an FMU. I'm also thinking if I go TFI I can more than likely play with the ignition curve depending on the boost/vacuum of the engine.

God, I wanted this truck to be full mechanical with minimal electronics but between the E4OD I have sitting and all the EFI parts I have including the MS3 and turbo that I SOOOOOOOOO want to play with...

N/A I litterly have everything I need and it all works. Sure I would change things because you don't put a fuel pump from a 150k mile truck in, but that's maintenance things.

AGRRR!!!!!!!!

Why do I keep coming back to EFI and lots of computers????

Maybe it has something to do with the fact that I used to have an IT company in the dot com days and run Linux on my laptop for fun and I love tinkering with computers...

The fuel system was the only last hiccup / saving grace for me because I didn't want to scrounge the parts to do EFI with dual tanks but I've decided to go with a bronco tank in the rear only.

Now finding out that for 10-12 psi that turbo is actually a really good match... I'm getting pie-eyed ideas about Nelson Racing's setup where they have a second fuel system that's on demand as boost comes up that uses race gas... I could use the front tank for that...

Here's some NRE turbo **** for those that are unfamiliar...

WARNING: FOUL LANGUAGE in all videos. Also ignore that it's chevy power...

 

I've built microprocessors from the chip up, written an OS for one, troubleshot RTL and TTL circuits with a 'scope, long before logic probes, played with maskable and non-maskable interrupts for fun, and still have a working 'scope and lab power supply. But, as much as Megasquirt looks like fun, I'm happy with my carb. At least on this truck since it'll get passed on in the family and I don't see anyone capable of figuring out Megasquirt. However, I don't see anyone capable of rebuilding a carb either. Hmmmm.....

 

I'm 37 with no kids, so I'm not worried about who's going to get the truck next... And I'm not making a pitch for everyone to run out and build a megasquirt box. I just happen to have one from an aborted project just collecting dust and I've been dying to try one since I first read about it. The only thing mine's run is the little tester I built with it...

The 4bbl and DSII wouldn't be too far away...

 

I have CONSIDERED this option a little pricey but still a little cheaper than full EFI);;
DEI Ny-Trex Carbureted Wet Nitrous Systems - JEGS

Just dreamin..Trav..