Turbo Sizing for a 341" DeSoto Hemi
03-17-2008, 01:21 PM
#1
TECH Addict
Thread Starter
Turbo Sizing for a 341" DeSoto Hemi From reading this section for years, I really don't know where else to ask for help on this.
I have a 1956 DeSoto 341" hemi in my 1949 Hudson. I'd like to turbo it and was doing some reading at forcedinductions.com and over at turbofast.com.au. I was given a recommendation to use something with larger than a 70mm inducer, seeing as that compressor size would be paired with a turbine housing that wouldn't choke the exhaust side of the engine with sky high pressure ratios.
A T76 looks good to my eyes, running about 7psi. I found a Precision Pt-74 for sale and was wondering if that would work as well. It has an on-center housing with a .85 A/R.
The setup would be through the stock exhaust manifolds going through some stainless tubing to a front mount setup, ala F-body front mounts. It would be a blow-though carb setup as well.
Thoughts and opinions would be appreciated.
I have a 1956 DeSoto 341" hemi in my 1949 Hudson. I'd like to turbo it and was doing some reading at forcedinductions.com and over at turbofast.com.au. I was given a recommendation to use something with larger than a 70mm inducer, seeing as that compressor size would be paired with a turbine housing that wouldn't choke the exhaust side of the engine with sky high pressure ratios.
A T76 looks good to my eyes, running about 7psi. I found a Precision Pt-74 for sale and was wondering if that would work as well. It has an on-center housing with a .85 A/R.
The setup would be through the stock exhaust manifolds going through some stainless tubing to a front mount setup, ala F-body front mounts. It would be a blow-though carb setup as well.
Thoughts and opinions would be appreciated.
03-17-2008, 01:28 PM
#2
LS1Tech Co-Founder
iTrader: (34)
Very cool, I thought about turbocharging my '51 Merc but I have too much going on right now. You might also want to check around www.jalopyjournal.com though it's more of a traditional pre-64 website. But you can search on key words like 'turbo.'
I'd think you'd want to research between 66mm and 80mm turbos. How high can you spin that engine, 5500? I have a crate SBC in the Merc.
I'm running a large frame 47-88 in my Formula and it's laggy at lower rpms.
I'd think you'd want to research between 66mm and 80mm turbos. How high can you spin that engine, 5500? I have a crate SBC in the Merc.
I'm running a large frame 47-88 in my Formula and it's laggy at lower rpms.
03-17-2008, 04:45 PM
#3
TECH Addict
Thread Starter
I've been a member over on the HAMB for a couple years now, but it seems like most of the guys over there are concerned with how many 97's they can stuff on an intake, but to be honest I never searched there.
The engine signs off right around 4500rpm now. But there are stories of the cams that came in that engine being ground on a 121* LSA. I had originally looked at a 60-1 turbo, but that exhaust housing would be more suited to the 4.8L in my truck. I then looked into the MP T70 turbos, and am still on the fence about one of those units, with the mixed reviews that are out there.
My gut seems like something in the 70-76mm range would do the best.
How is the Merc coming along John? I thought I read about you wanting to swap some form of Lsx in there.
The engine signs off right around 4500rpm now. But there are stories of the cams that came in that engine being ground on a 121* LSA. I had originally looked at a 60-1 turbo, but that exhaust housing would be more suited to the 4.8L in my truck. I then looked into the MP T70 turbos, and am still on the fence about one of those units, with the mixed reviews that are out there.
My gut seems like something in the 70-76mm range would do the best.
How is the Merc coming along John? I thought I read about you wanting to swap some form of Lsx in there.
03-17-2008, 08:52 PM
#5
TECH Addict
Thread Starter
03-17-2008, 09:06 PM
#7
LS1Tech Co-Founder
iTrader: (34)
Tangent: I am tempted to drop in an LS-something into the Merc, maybe if an interesting shortblock comes my way I'll get motivated. I already have a TH350 in the car, and I have two LS1 TH400/TH350 converters just sitting here.
You can also look at www.theturboforums.com too. How would you control the fueling?
You can also look at www.theturboforums.com too. How would you control the fueling?
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03-17-2008, 10:19 PM
#8
From reading this section for years, I really don't know where else to ask for help on this.
I have a 1956 DeSoto 341" hemi in my 1949 Hudson. I'd like to turbo it and was doing some reading at forcedinductions.com and over at turbofast.com.au. I was given a recommendation to use something with larger than a 70mm inducer, seeing as that compressor size would be paired with a turbine housing that wouldn't choke the exhaust side of the engine with sky high pressure ratios.
A T76 looks good to my eyes, running about 7psi. I found a Precision Pt-74 for sale and was wondering if that would work as well. It has an on-center housing with a .85 A/R.
The setup would be through the stock exhaust manifolds going through some stainless tubing to a front mount setup, ala F-body front mounts. It would be a blow-though carb setup as well.
Thoughts and opinions would be appreciated.
I have a 1956 DeSoto 341" hemi in my 1949 Hudson. I'd like to turbo it and was doing some reading at forcedinductions.com and over at turbofast.com.au. I was given a recommendation to use something with larger than a 70mm inducer, seeing as that compressor size would be paired with a turbine housing that wouldn't choke the exhaust side of the engine with sky high pressure ratios.
A T76 looks good to my eyes, running about 7psi. I found a Precision Pt-74 for sale and was wondering if that would work as well. It has an on-center housing with a .85 A/R.
The setup would be through the stock exhaust manifolds going through some stainless tubing to a front mount setup, ala F-body front mounts. It would be a blow-though carb setup as well.
Thoughts and opinions would be appreciated.
03-18-2008, 01:47 AM
#10
TECH Addict
Thread Starter
The Car:
The Engine:
You could do a 327 if you still have that 4.8L crank laying around and a 6.0L block.
I'd control the fueling with the 600cfm Edelbrock carb that I have on there now, probably hooked to a Studebaker R2 inlet elbow. I'd monitor the fueling with a wideband most likely.
I have a disc brake kit coming for it this week. It has billet steel hubs to replace the stock iron ones. I can then put discs on those hubs.
Bruce Crower ran 157mph on the salt with a 6-71 blown '53 Chrysler hemi in his 1949 hudson coupe with stock brakes. I'm not that brave though, since when these four wheel manual drums things heat up, they fade very badly.
Yep, thats the one boys.
The Engine:
Originally Posted by Pro Stock John
Tangent: I am tempted to drop in an LS-something into the Merc, maybe if an interesting shortblock comes my way I'll get motivated. I already have a TH350 in the car, and I have two LS1 TH400/TH350 converters just sitting here.
You can also look at www.theturboforums.com too. How would you control the fueling?
You can also look at www.theturboforums.com too. How would you control the fueling?
I'd control the fueling with the 600cfm Edelbrock carb that I have on there now, probably hooked to a Studebaker R2 inlet elbow. I'd monitor the fueling with a wideband most likely.
Originally Posted by gametech
Just out of curiosity, what plans do you have for brakes?
Bruce Crower ran 157mph on the salt with a 6-71 blown '53 Chrysler hemi in his 1949 hudson coupe with stock brakes. I'm not that brave though, since when these four wheel manual drums things heat up, they fade very badly.
Originally Posted by trtturbo
well, this the turbo he is talking about.
03-19-2008, 02:22 AM
#13
TECH Addict
Thread Starter
Is it better to call or Pm you guys about an out the door and shipped quote?
You'll find something that will pique your interest. Thanks, your car doesn't look half bad either. Your car is essentially the more popular version of mine; when I'm out driving it, everyone asks if it is a Packard or a Merc.
Originally Posted by Pro Stock John
I actually threw out that 4.8 crank I had when I moved two moves ago.
Car looks cool!
Car looks cool!
08-13-2013, 07:06 PM
#14
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Turbocharged Desoto 341 The Car:
The Engine:
You could do a 327 if you still have that 4.8L crank laying around and a 6.0L block.
I'd control the fueling with the 600cfm Edelbrock carb that I have on there now, probably hooked to a Studebaker R2 inlet elbow. I'd monitor the fueling with a wideband most likely.
I have a disc brake kit coming for it this week. It has billet steel hubs to replace the stock iron ones. I can then put discs on those hubs.
Bruce Crower ran 157mph on the salt with a 6-71 blown '53 Chrysler hemi in his 1949 hudson coupe with stock brakes. I'm not that brave though, since when these four wheel manual drums things heat up, they fade very badly.
Yep, thats the one boys.
The Engine:
You could do a 327 if you still have that 4.8L crank laying around and a 6.0L block.
I'd control the fueling with the 600cfm Edelbrock carb that I have on there now, probably hooked to a Studebaker R2 inlet elbow. I'd monitor the fueling with a wideband most likely.
I have a disc brake kit coming for it this week. It has billet steel hubs to replace the stock iron ones. I can then put discs on those hubs.
Bruce Crower ran 157mph on the salt with a 6-71 blown '53 Chrysler hemi in his 1949 hudson coupe with stock brakes. I'm not that brave though, since when these four wheel manual drums things heat up, they fade very badly.
Yep, thats the one boys.
