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  #1  
Old 07-13-2001, 08:38 PM
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TT440 TT440 is offline
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Thumbs up twin turbo 440? A budget build...

I had someone ask me to post a little info over here, so here I is.
The TT440 has been alive for a couple months and I'm working the final bugs out. This was a budget build put together in my driveway except for the welding. I spent two years researching and collecting parts before starting the build. I have designed the entire system but did reference the pros on the cam and turbo designs.
My next toy will be an '87 Grand Fury cop car. The roller 318 will be getting twins too. Talk about a sleeper! That build shoud run about $400 if I get a welder first.

Here's a quickie run-down:
Pearl Black '65 Belvedere
1970 440 bottom end.
452 heads
.030 over forged flatties at 8.7:1
custom ground cam (mild)
Edelbrock Performer intake
carter 750 carb
twin T3/T4 hybrid turbos (custom built)
Tial wastegates
2.2 turbo blow off valves (2)

I was looking for 650 hp on pump gas. It looks like I made it. I need to upgrade the fuel return line this weekend. The regulator doesn't react fast enough for full throttle bursts.
I can tell you that with 2/3 throttle and 8 psi, it's accelerating faster than the .509 cammed 440 ever could.

As soon as the fuel return is fixed, I'll go for some dyno numbers. I can't take it to the track due to lack of a cage. They don't buy the "it only runs 12's" bit.

If'n ya want to see the site we're putting together, you can check it out at the link. Be warned, the first page is very techie/wordy but the other two pages have lotsa pictures. I'm working at upgrading the page.
TT440 page
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  #2  
Old 07-13-2001, 11:01 PM
djswwg djswwg is offline
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TT440---you are 1 sick puppy! And I mean it..........in the nicest possible way of course!!!!!!!!!!!! The pictures on your website are GREAT; especially the burnout. That's a super looking car by the way! So now the BIG question; what are the 1/4 mile stats?? thanks.....................djs
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  #3  
Old 07-14-2001, 12:44 AM
Thunderhead Thunderhead is offline
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Hey Feets, 'ole Thunderhead here! Before you came along I was all well and good with the idea of a 500ci BB! Now if I could only put the set-up together for my 65 Fury 383!!! I remember you saying something about using different wastegates, right? Let me know. I think I could actually pull this off!
Thunderhead
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  #4  
Old 07-14-2001, 01:22 AM
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TT440 TT440 is offline
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Times and dyno results are still a little bug away. I need to replace the fuel return line before I can hold continuous boost. The small return line is fooling the regulator and causing problems. I do expect around 600 hp and low 11s at first. I should be able to dial it in from there. I don't think 650 or mid 10s will be a problem.

T-head... I was talking about using wastegates mounted on the turbos. Just like factory cars. They're much cheaper. It would cut the wastegate price from $450 to around $50 or so.
I went with the higher flow externals. The difference is not appreciable at current power levels, but it will come into play as I go higher/faster/farther.

Again, this was a super easy build. Doing my homework before the build is what made it such a breeze. For once, I fully understood what I was doing.
All my big fuel problems were traced to a persnickity pump. It was working sporadically. Sometimes high psi, sometimes low. The new fuel pump made a drastic improvement. It has shown that my return line is indeed too small. The new 1/2" tubing should be more than adequate.
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Old 07-14-2001, 10:38 AM
Dr. Righteous Dr. Righteous is offline
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Lightbulb HA! I love it!

Been a dream of mine to build a twin turbo setup. I have a 8:1 '73 400 begging for a rebuild saved for this purpose.
I posed a question in the 'supercharging' thread for you 440TT.

I would love a similar build up in a B body (a 71 or 72 RR or Sat if my dreams come true) with this 400 built for TOP END!!
That's right! A skinny 2:73 gear and balls 'o steel! It would be fun different for sure and get reasonable gas mileage
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Old 07-14-2001, 10:53 AM
Dr. Righteous Dr. Righteous is offline
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Exclamation THUNDERHEAD! Sweet Fury man!

I'm a C-body fan myself but I have all my bread invested in my current B body project. C bodies are plentiful and CHEAP and you can usually find them in FANTASTIC condition!! A neighbor of my knot head brother was selling a SWEET '67 Fury 2dr HT 383 car for $1200 a few months ago. He didn't advertise it so only locals and passers by knew about it. I didn't have the bread myself but I kept nagging my brother to SNAG THAT BARGAIN before someone else did! He kept putting it off until one the car was gone. My brother asked the old man if he sold it and the old man said "YEP! I couldn't sell it then a guy offered me $600 cash and I took it because I was tired of it killing the grass in my yard!"
Needless to say my bro almost fainted!~ This car sat across the street from him for months.
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  #7  
Old 07-14-2001, 01:57 PM
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TT440 TT440 is offline
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Default mileage?

Hey there good Doc...

Would you believe that using a 4.30 gear and 833 OD tranny has given me 17 mpg in the TT440?
Your STOCK cam in that 400 would make bunches of power. It's one of the best choices out there.

If you were after a budget deal, It could be done for $2000 or less. The price would depend upon your abilities.
The '66 and newer B bodies have much larger engine compartments. It would be fairly easy to keep the turbos under the hood and not poke 'em through the inner fenders.
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Old 07-15-2001, 12:05 AM
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rb77413 rb77413 is offline
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SO ur gonna do a Dip. I have a Ex-cop car now sitting engineless, waiting for another 318 for me to drop in. Twin Turbos would be cool in that car. PURSUIT!!!! Let us know how it turn out. Any ideas on using the 2.2L Garrett Turbos on the small block? They might not put out enough air. Any ways Let us know. Good luck on ur project, And it is a very nice car.

Bob
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  #9  
Old 07-15-2001, 01:25 AM
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TT440 TT440 is offline
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Those are the exact turbos I'm going to use on the cop car. They will feed enough air for a mild boost 318 at reasonable rpm.
A 360 would begin to suffer and a 383 would choke with them.
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Old 07-15-2001, 11:26 PM
mr_340 mr_340 is offline
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Default Blow Through Carb

How do you handle the fuel pressure on the carb under boost? I remember that this was one of the hardest things to overcome when using a carb. Are you plumbing the boost signal to a Holley-type regulator to increase the fuel pressure under boost?
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  #11  
Old 07-16-2001, 12:12 AM
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TT440 TT440 is offline
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Default Howdy neighbor!!!

I'm using a Mallory 4309 regulator and Carter 15 psi pump.
The regulator is made with a boost refrence port.
Most regulators and mechanical pumps have atmospheric ports. That's how they hold 6 psi in Dallas and Denver without calibration. The Mallory simply has a vacuum line barb on it's vent/port. Boost pressure is fed into the port. The pressure pushes on the diaphragm and changes the pressure accordingly. Boost goes up 1 psi, fuel goes up 1 psi.

The setup I plan on using for the cop car is much easier. I'll tap into the atmo port on a Carter high volume mechanical fuel pump and feed it a little boost. It's what I should have done on the TT440, but NOOOOOO I had to get fancy. I've been paying for that with fueling problems. I just replaced my return line this evening. The car has picked up big power. Fuel pressure is better balanced now. I've still got a little bug to work out. I'll run the fuel pressure gauge up on the cowl so I can see what's happening under boost. It feels like I'm draining the bowls under full throttle bursts. I need to see if it's a pressure or metering problem.
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  #12  
Old 07-16-2001, 02:18 AM
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curious curious is offline
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Default just asking you,before consulting turbo guy

what do you think of the idea of "sequential turbochargers"? if you never heard of the term, its where you run one small turbo (such as 2.2 garret) and one larger turbo. the smaller one spools up faster at lower rpm while the larger one supplies the monstrous amount of air needed at higher rpms. im doing some studying and come accross this technique. sound stupid or risky? why? plan on buy/borrowing/stealing/begging as much info as possible. if i cant get enough info ill prolly take the lazy mans route and buy a ati procharger. hey, thats a idea-small procharger like 600b and a turbo. reduces lag and keeps on going way into rpms.
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