Inline 250 - T3 Turbo - w/ Video

[tincan1966]

Originally Posted by longbed67

When you open your build thread and you are on page 1 of it, copy the URL by highlighting it and right click- copy, then go to the quick links tab at the top and select edit signature there will be a box where you can enter text. then right click-paste in the box. and wallah your build thread is part of your

I knew it would be stupidly simple!!

Thanks for the help there!

[boucher racing]

Originally Posted by tincan1966

.(plan is for a single 3" with a Flowmaster Super 44 muffler.
Working on an intake manifold now, debating on Fuel inj or carb. Most likely will use a Holley 350 cfm. Also considered a draw-thru type setup.

.

Cool, sounds like you have got a good setup with a machine shop. That helps.

If I can recommend, I would get a Offy 5416 and run a Holley 2300 500cfm carb, and look into a bullet style muffler (straight through design). The turbo quiets down the exhaust note.

Good Luck

Shad

[Torqueforce]

We demand full throttle footage! I would love to see a trend of turbo'd 60-66's. What are you doing for fuel pump?

[boucher racing]

Originally Posted by Torqueforce

We demand full throttle footage! I would love to see a trend of turbo'd 60-66's. What are you doing for fuel pump?

I am using the factory mechanical fuel pump. It is boost referenced from the air cleaner spacer. It is suppose to raise the fuel pressure 1:1.

Top side:


I drilled and tapped a brass nipple on the 45deg edge. This is the bottom side of the fuel pump. The pressure from the boost pushes against the bottom side of the rubber diaphragm inside.

[longbed67]

Originally Posted by boucher racing

I am using the factory mechanical fuel pump. It is boost referenced from the air cleaner spacer. It is suppose to raise the fuel pressure 1:1.

Top side:


I drilled and tapped a brass nipple on the 45deg edge. This is the bottom side of the fuel pump. The pressure from the boost pushes against the bottom side of the rubber diaphragm inside.

This setup is also what I did...Just some more good info on mechanical fuel pumps... if you want to run a 4bbl or double pumper you should run the fuel pump off of a 1984 L6 250 which had a base pressure of 6-8psi instead of the 4-6psi of all earlier L6 250 mechanical pumps. As well boost referenced mechanical pumps are good to 12-14lbs of boost after that, they cant keep up.

[boucher racing]

I finally scored a OFFY 5416 intake, from a member here on the board, thanks Steve.

I finally got the chance to dig in today. The turbo looks in great shape, as well as the up and down pipes.

When I took off the intake/exhaust I was revealed an issue. I had noticed oil/gas stains coming down from that area and running down the block. I kept on trying to clean it up but could never see the source.

It looks as though the intake was not tight against the block and fuel was leaking from the intake and down the block. Probably caused from running rich and boost pressure.



I am taking my Offy and exhaust manifold in to get resurfaced, hopefully that will correct the issue.

Boucher'


and also an artsy pic of my turbo. Praise Garrett!

[longbed67]

Looks like you have your work cut out for ya! How long at a time were you running your truck? I'm wondering if on short trips the fuel was condensating and the intake didnt have time to heat up completely to evap back off...

[longbed67]

I actually found your url link took me a couple min but I found it


http://67-72chevytrucks.com/vboard/s...d.php?t=493462

[longbed67]

Also what kind of fuel are you running and does it have ethanol or lead in it? Ethanol and lead can cause deposits that are white similar to that is on your turbine fins, but if your not running either one, that tells me your running WAY to lean and would also explain why your running hot.

[HouldenCaulfield]

maybe I missed it, what intake were you running originally with the Holley 350? I am thinking of upgrading my Inline 6 with a Holley 350 but wasn't sure if I had to change out my stock intake also.

[boucher racing]

Originally Posted by HouldenCaulfield

maybe I missed it, what intake were you running originally with the Holley 350? I am thinking of upgrading my Inline 6 with a Holley 350 but wasn't sure if I had to change out my stock intake also.

I milled the original 1bbl intake to the size of a Holley 2bbl. It was opening up a can of works though... intake sleeve, voids, JB weld to fill.

You can buy a 2bbl to 1bbl adapter. Naturally aspirated would be fine, but if I were turbocharging it, just get the Offy from the start.

[HouldenCaulfield]

Originally Posted by boucher racing

I milled the original 1bbl intake to the size of a Holley 2bbl. It was opening up a can of works though... intake sleeve, voids, JB weld to fill.

You can buy a 2bbl to 1bbl adapter. Naturally aspirated would be fine, but if I were turbocharging it, just get the Offy from the start.

Thanks for the info. I planned to just do naturally aspirated.
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[67stepsideC10]

Wow sweet build, subscribing for ideas for my 250!

[camaney]

nice, where did you get the spacer for the 2 barrel?

[duallyjams]

good info on a turbo 6

[boucher racing]

Thanks, good info to know. Those VID about turbo blankets are almost hard to believe.

I found a company PTP turbo shield, that is spoken very highly also.

Boucher'

[longbed67]

Oh yeah forgot to add when you install it be prepared for the wrap to smoke the first couple times you run it! yes it will give you a little scare but this is normal!

[boucher racing]

Originally Posted by longbed67

Oh yeah forgot to add when you install it be prepared for the wrap to smoke the first couple times you run it! yes it will give you a little scare but this is normal!

HaHa, I installed some wrap on my Chevy II. When I first fired it up, I about schart my pants. No one told me about that!

[boucher racing]

I got to shake out JED today with the new goods. A new Offy intake, machined flat intake/exhaust manifolds, new carb base plate, gaskets, turbo blanket, and up/down pipe wrapped.

Much more power, response, smooth transitions. I ran it for around 20min, popped the hood, and could literally put my hand directly on the turbo blanket. I was very impressed.

[longbed67]

The PTP lava blankets look to be nearly the same as the DEI ones... at a much cheaper price. I would be tempted to give it a try.

[longbed67]

Looks stellar! I'm glad it all turned out for you!

[K5 Addiction]

Awesome dude! I knew that intake would make a big difference. Awesome work as always my friend. Next step intercooler!

[boucher racing]

Originally Posted by K5 Addiction

Awesome dude! I knew that intake would make a big difference. Awesome work as always my friend. Next step intercooler!

If I get an intercooler, your big ass will be down at my house helping me pull what's left of my shredded tranny!

If this weather ever breaks, I'll be by.
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[boucher racing]

2/8/13

A quick update on exhaust and a sweet swap find!

Tuck and Dump: total appreciation to all who have this "look". The routing is much harder than it looks. The results are a bit quieter exhaust not and no drone. Pleased




The $5 swap meet find. I was as happier than a puppy with two peckers!

[rtk434]

Exhaust looks good! That's how I always have ran the tail pipe on my trucks.
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