Inline six 170ci boost!

[Trevor VanLandingham]

How to get 150hp and at least 300flb's out of a 68 inline six 170ci?

 

[Jdgephar]

Not sure what the numbers are...

 

[Soylent]

Is that a Paxton?

 

[Broncobowsher]

Is that a Paxton?

No, Turbo. Looks like a pretty small one.
The next question is how long will the 170 survive with boost and how much octane is needed to make that happen? Don't forget rebuilding the engine first as you will need to open up some ring gaps so you don't pinch a ring and blow the crown off the piston.

 

[Soylent]

Right. There it is in plain sight directly connected to the exhaust manifold and I missed that.

 

[bmbm]

With the seven main bearings and turbo at reasonable boost setting it could last awhile.

 

[EFI Guy]

I've been working on an interesting similar project. It's a 200-I6 with an aluminum head, SEFI, EDIS, 4R70W, and an Eaton M90 Supercharger. All ran off of a Ford PCM. No idea what it will make for power but it should be interesting.

 

[Bajabrewer]

With the seven main bearings and turbo at reasonable boost setting it could last awhile.

Pretty sure the 170 only had 4 main bearings
In 1966 when the 200 came along for the Mustang they went to 5 freeze plugs & 7 main bearings
I also remember seeing a thread about a 66 Bronco that was turbocharged & raced up ski hills in Colorado or Utah, I looked but couldn't find it - anyone else remember that one?

 

[Broncobowsher]

I recall the 170 was a 4-main bearing in cars, but the Bronco (van/truck) version got the 7-bearing.

More bearings help stabilize the crank, but it still isn't a performance piece. That is a long crank for a cast piece.
The head is what really hurts, just can't flow. Boost is mainly a sign that it just can't flow.

 

[bronco italiano]

What is wrong with a 300-6. Pretty good engine if you want the inline 6.

 

[stout22]

Pretty sure the 170 only had 4 main bearings
In 1966 when the 200 came along for the Mustang they went to 5 freeze plugs & 7 main bearings
I also remember seeing a thread about a 66 Bronco that was turbocharged & raced up ski hills in Colorado or Utah, I looked but couldn't find it - anyone else remember that one?

You are correct. The 200 would make a much stronger baseline.

 

[B RON CO]

Hi, visit fordsix.com. There are plenty of guys building high performance inline sixes. Start with boring and decking the block, select a better piston, and plan on a different cylinder head or plenty of head work. There are lots of cam choices. Fordsix has a turbo and blower forum. Good luck

 

[Broncobowsher]

What is wrong with a 300-6. Pretty good engine if you want the inline 6.

Physical length. It is a long engine. Much longer than the 170/200. The engine bay in a Bronco isn't that roomy.

 

[toddz69]

I've been working on an interesting similar project. It's a 200-I6 with an aluminum head, SEFI, EDIS, 4R70W, and an Eaton M90 Supercharger. All ran off of a Ford PCM. No idea what it will make for power but it should be interesting.

That sounds like a cool project! Is the M90 from the Thunderbird SC?

Todd Z.

 

[toddz69]

Pretty sure the 170 only had 4 main bearings
In 1966 when the 200 came along for the Mustang they went to 5 freeze plugs & 7 main bearings
I also remember seeing a thread about a 66 Bronco that was turbocharged & raced up ski hills in Colorado or Utah, I looked but couldn't find it - anyone else remember that one?

Charlie Erickson had a supercharged '66 dune toy that eventually ended up with a family in Utah (the son is/was a member here). Truck is white.

Todd Z.

 

[Bajabrewer]

Charlie Erickson had a supercharged '66 dune toy that eventually ended up with a family in Utah (the son is/was a member here). Truck is white.

Todd Z.

That's the one I was thinking of - I knew it had Boost! It's a Paxton blower with 2 blow thru carbs - That's a unique set up!!

Great thread with loads of cool pics.
https://classicbroncos.com/forums/threads/the-racing-bronco-restoration.170577/

There's a Turbo, Supercharged & Nitrous performance area at fordsix.com lots to read if you have the time....

https://fordsix.com/forums/turbo-supercharger-and-nitrous.22/

 

[ntsqd]

I recall seeing a big block six (240/300) in a rear engine dragster at the World Finals or maybe the Winter Nationals in about 1988 or so. It had a 4V Cleveland cylinder head on it. Caught my eye because of the gold ano'd Moroso rocker cover on it. Remember when you weren't cool if you didn't have a set of those? Got to looking at it and someone had furnace-brazed three 4V Cleveland cyl. heads together. Couldn't be two because how the cuts had to be made. Rocker cover was the same deal, cut up three of them and then TIG'd them together. I'm sure that there were a LOT of little details that had to happen for it to work at all. I've long wondered whatever became of that engine.....

 

[bmbm]

Pretty sure the 170 only had 4 main bearings
In 1966 when the 200 came along for the Mustang they went to 5 freeze plugs & 7 main bearings
I also remember seeing a thread about a 66 Bronco that was turbocharged & raced up ski hills in Colorado or Utah, I looked but couldn't find it - anyone else remember that one?

That is a possibility as I have seen various opinions on this. I have attached link to the small six id section of fordsix.com:

Small Six Identification

What inline six do you have? Here's how to know!

fordsix.com

The OP states he has a 68 170.

 

[bmbm]

What is wrong with a 300-6. Pretty good engine if you want the inline 6.

Agreed I have had several over the years. If only Ford had added a couple inches length in the engine bay and made it an option...
But I can say that for me the 250 and NV3550 has been great.

 

[Broncobowsher]

I recall seeing a big block six (240/300) in a rear engine dragster at the World Finals or maybe the Winter Nationals in about 1988 or so. It had a 4V Cleveland cylinder head on it. Caught my eye because of the gold ano'd Moroso rocker cover on it. Remember when you weren't cool if you didn't have a set of those? Got to looking at it and someone had furnace-brazed three 4V Cleveland cyl. heads together. Couldn't be two because how the cuts had to be made. Rocker cover was the same deal, cut up three of them and then TIG'd them together. I'm sure that there were a LOT of little details that had to happen for it to work at all. I've long wondered whatever became of that engine.....

I think recently someone grafted a few LS heads together and put them on a 300. The real early 300s also had a forged crank. But it was only a year or two, and I think only on the BIG trucks. Rare piece.