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Re: Twin Turbo Big Block video [Re: Defbob] #582653 01/15/10 04:55 PM 01/15/10 04:55 PM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	low RPM and boost dont get along well. at least you built a completed system.

Re: Twin Turbo Big Block video [Re: Defbob] #582654 01/15/10 05:04 PM 01/15/10 05:04 PM
Joined: Jan 2003 Posts: 8,180 Detroit, MI CokeBottleKid master
CokeBottleKid master Joined: Jan 2003 Posts: 8,180 Detroit, MI	Quote: The Turbos are too small. i should have gotten T4's, but i figured these would make boost off of idle and almost act like a supercharger Ya, sounds good up until you hit 3k at WOT and stop making power/start detonating like crazy .

Re: Twin Turbo Big Block video [Re: topbrent] #582655 01/15/10 05:28 PM 01/15/10 05:28 PM
Joined: Jan 2003 Posts: 1,020 Andrews,In. U.S.of A. 6 67_Satellite super stock
67_Satellite super stock 6 Joined: Jan 2003 Posts: 1,020 Andrews,In. U.S.of A.	No comment on turbine size,but are those oil feed lines supported?Vibration induced cracking and leakage would ruin your day quickly. I ran mine with braided -6 line to be safe.

Re: Twin Turbo Big Block video [Re: Defbob] #582656 01/15/10 05:58 PM 01/15/10 05:58 PM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	not that you would want to bandaid or rig it all up but i wonder if you could us a bleedoff valve to get rid of some of the exhaust before the turbo's.

Re: Twin Turbo Big Block video [Re: Defbob] #582657 01/15/10 06:37 PM 01/15/10 06:37 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: btw, it makes 2lbs idling at 1000rpm how? I had a paxton on a very mild 440 w/ not much stall and in N I'd get no boost no matter the rpms? My understanding is unless the engine has a load, and in N it shouldn't you should have no boost???? even at highway speeds my boost was minimal. Does a turbo(s) work different? [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Twin Turbo Big Block video [Re: Mr.Yuck] #582658 01/15/10 07:58 PM 01/15/10 07:58 PM
Joined: Aug 2005 Posts: 760 Southington Ct. T turbobitt super stock
turbobitt super stock T Joined: Aug 2005 Posts: 760 Southington Ct.	Tim, Two things come to mind, First is that the turbine and/or the housing A/R is much to small. Second - the Backpressure will most likley climb very fast and create valve float and other issues before you get in any usable RPM band. If possible, I would try and plumb a gage port in at least one of the manifolds and monitor backpressure. In a perfect system, It should be near a 1:! ratio around your usable power band. It looks like in your case the Backpressure is going to be way to high and climb while your boost drops. Another thing that may happen is turbo overspeed. You may bust the compressor wheel if you spin it up to fast with that backpressure. Allan G. 1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.

Re: Twin Turbo Big Block video [Re: Defbob] #582659 01/15/10 08:48 PM 01/15/10 08:48 PM
Joined: Nov 2007 Posts: 778 Sherwood park, Alberta. go green super stock
go green super stock Joined: Nov 2007 Posts: 778 Sherwood park, Alberta.	Quote: btw, it makes 2lbs idling at 1000rpm Your blow off valve should be manifold referanced and your wastegate bottom port should manifold referanced . You should have vacuum at idle . There is something out of whack. You should see the blow off valve open at idle and slam shut when you chop the throttle if you have all that boost. The exhaust manifold length has nothing to do with it. 6.50 @ 226 MPH 4.25 @ 186 MPH https://www.youtube.com/watch?v=YX86DHGKBo0

Re: Twin Turbo Big Block video [Re: Mr.Yuck] #582660 01/15/10 09:02 PM 01/15/10 09:02 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	I looked at the gauge. I must retract the 2lbs at idle statement it is not making boost at idle

Re: Twin Turbo Big Block video [Re: Defbob] #582661 01/15/10 09:05 PM 01/15/10 09:05 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	the wastegates and blowoff are plumbed correctly. I just hope this holds together for a couple good passes at Lebannon Valley for Muscle Palooza. Al, the manifolds did glow when breaking in the cam

Re: Twin Turbo Big Block video [Re: Defbob] #582662 01/15/10 09:28 PM 01/15/10 09:28 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	I was wrong. I double checked a diagram. I have the blowoff reference on the wrong side of the carb. Thanks guys for the info and getting me to double check things

Re: Twin Turbo Big Block video [Re: Defbob] #582663 01/15/10 09:33 PM 01/15/10 09:33 PM
Joined: Aug 2005 Posts: 760 Southington Ct. T turbobitt super stock
turbobitt super stock T Joined: Aug 2005 Posts: 760 Southington Ct.	Tim, What ae the specs on the turbos ? Allan G. 1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.

Re: Twin Turbo Big Block video [Re: turbobitt] #582664 01/15/10 10:12 PM 01/15/10 10:12 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	do you have your fuel boost referenced? [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Twin Turbo Big Block video [Re: Mr.Yuck] #582665 01/15/10 11:36 PM 01/15/10 11:36 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	the mechanical fuel pump is boost referenced and surprisingly works

Re: Twin Turbo Big Block video [Re: turbobitt] #582666 01/15/10 11:38 PM 01/15/10 11:38 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	Quote: Tim, What ae the specs on the turbos ? Allan G. T3/T4 Turbos T3 Flange to Manifold - 5 Bolt Hot Side Downpipe Flange - .50 A/R Compressor - .63 A/R Turbine - 3" Inlet & 2" Outlet - 1/8 NPT Oil Inlet - 350 WHP capable - 5~30 PSI Working Pressure - Computer Balanced Individually

Re: Twin Turbo Big Block video [Re: Defbob] #582667 01/15/10 11:55 PM 01/15/10 11:55 PM
Joined: Jan 2003 Posts: 1,771 St.Clair Shores MI. tilt top fuel
tilt top fuel Joined: Jan 2003 Posts: 1,771 St.Clair Shores MI.	Quote: Quote: Tim, What ae the specs on the turbos ? Allan G. T3/T4 Turbos T3 Flange to Manifold - 5 Bolt Hot Side Downpipe Flange - .50 A/R Compressor - .63 A/R Turbine - 3" Inlet & 2" Outlet - 1/8 NPT Oil Inlet - 350 WHP capable - 5~30 PSI Working Pressure - Computer Balanced Individually What is the size of the turbine wheel or spec."P" trim? or "Q"? Millimeters if known? .63 are prolly gonna give a ton of back pressure. How much seat pressure are you running on the valves? 150 or more? 68 CORONET R/T BEST MACHINE BUILT EFI'd TWIN TURBO(UP and RUNNING !!) 03 Mach1

Re: Twin Turbo Big Block video [Re: tilt] #582668 01/16/10 09:38 AM 01/16/10 09:38 AM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	i don't know the trim. The springs are the ones that come on Edelbrock RPM heads

Re: Twin Turbo Big Block video [Re: Defbob] #582669 01/16/10 09:45 AM 01/16/10 09:45 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: the mechanical fuel pump is boost referenced and surprisingly works that's what I did too. When I was told how to do it I was like...what no way that's going to work.

Re: Twin Turbo Big Block video [Re: Mr.Yuck] #582670 01/16/10 10:29 AM 01/16/10 10:29 AM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	i have a turbo book from 1980

Re: Twin Turbo Big Block video [Re: Defbob] #582671 01/16/10 11:43 AM 01/16/10 11:43 AM
Joined: Sep 2007 Posts: 626 Mid-Ohio B Bakaruda432 mopar addict
Bakaruda432 mopar addict B Joined: Sep 2007 Posts: 626 Mid-Ohio	I would love to see that thing on a chassis dyno. My computor couldn't see the vid but those pics are hot!

Re: Twin Turbo Big Block video [Re: Bakaruda432] #582672 01/16/10 12:54 PM 01/16/10 12:54 PM
Joined: Nov 2004 Posts: 3,619 Norwich CT USA Defbob OP master
Defbob OP master Joined: Nov 2004 Posts: 3,619 Norwich CT USA	I just hooked up the throttle and return springs. I also mounted the pods for the gauges to be inside. I will mount the shifter today and torque the car up against the converter and see how it handles it. then I will do some burnouts and video it

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