408 turbo build - need advice
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From: Star City, Arkansas
408 turbo build - need advice I'm in the planning stages of building my Lq4 into a 408 stroker and have alot of questions about the set up I want to run. I plan on building to a 408 and I want to run the msd/edelbrock carb set up. The only problem with this I"m alittle unsure about how this is gonna pan out with running a turbo. I have seen a few people that have done this setup but just need some insurance and advice. Also what all is required in mounting up a th400 trans?
Last edited by Area 51 Racing; Nov 7, 2007 at 08:54 PM.
As for a blow through setup, naturally, you'll have to have a hat, and a carb built for a blower/turbo (seals, etc). Dad is looking to put a novi 1500 or vortech blower on his 434ci pontiac in his 68 GTO, I can't wait to start with headaches on that one! I'm guessing you're running an F-body? There are a ton of places on the net talking about conversions with th400 transmissions.
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Well actually I'm running a 97 chevy truck but I got a good deal on a 6.0. I got it complete except for the wiring harness and computer so instead of wasting my time in finding them, I just decided to go with the msd and a blow through carb. And as for the turbo set up, I will be fabing up a rear mounted system and most likely a 76mm turbo. I see your running a rear mounted turbo, what oil return pump did you go with?
Even though I am gonna with out a doubt go to a 408, it's gonna be hard to break down the stock rotating assembly with out having any fun on it. So I'm thinking about running it for a short while before i go all out. Any clue to how much a stock set up will hold?
Even though I am gonna with out a doubt go to a 408, it's gonna be hard to break down the stock rotating assembly with out having any fun on it. So I'm thinking about running it for a short while before i go all out. Any clue to how much a stock set up will hold?
408 high compression Blow through achol turbo setup would be a badass setup.
There is a guy I know that is running twin 76's with a high compression ford motor with blow through.
There is a guy I know that is running twin 76's with a high compression ford motor with blow through.
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From: Star City, Arkansas
Yea I do have plenty of room to run the turbo in the engine compartment but I had just rather run the remote style to keep the heat down in the engine compartment. And its just wicked.
I've found alot good info on putting a th400 behind my 6.0 but I'm still kinda in the dark about the flywheel. I keep on seeing that I need to run a certin size, but what size is that exactly?
I've found alot good info on putting a th400 behind my 6.0 but I'm still kinda in the dark about the flywheel. I keep on seeing that I need to run a certin size, but what size is that exactly?
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Turbo's don't add very much heat to the engine compartment as long as you have a heat shield on the turbine housing and locate it properly. All OEM turbo cars have the turbo under the hood. Even after 25+ years, there is no significant difference in heat degradation of non-metallics in the engine compartments of these cars. What are you so worried about?
Mike
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Verdad Gallardo I have a friend that is selling a full TH400 swap right now on here. https://ls1tech.com/forums/showthrea...t=#post8042573
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Thanks for the info on the ad.
And Mike, thanks for your info and ur 2 cents but i ain't worried about nothin. I know I can put it in the engine compartment and I know all OEM cars turbos are mounted on the manifolds but mine ain't oem and I guess I'm just into "fads." I just like the remote systems, I have nothing against turbos mounted in the engine compartment, it's just what I want.
And Mike, thanks for your info and ur 2 cents but i ain't worried about nothin. I know I can put it in the engine compartment and I know all OEM cars turbos are mounted on the manifolds but mine ain't oem and I guess I'm just into "fads." I just like the remote systems, I have nothing against turbos mounted in the engine compartment, it's just what I want.
Think about it this way. Remote has a oil pump and if it dies then your turbo is toast. On a front mount its a grav feed so inless the earth flips itself upside down then you are safe.
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Mike
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Ok, well this is about get out of my hands cause I'm never run either of the setups. I've run nothing but superchargers but is there anyone out there that has a rear mount setup that may throw in a couple of comments?
I mean yall have a very good point and another thing that is good about the set up is that I wont have to buy an expensive oil pump or a bunch of tubing to get back to the intercooler and intake.
I mean yall have a very good point and another thing that is good about the set up is that I wont have to buy an expensive oil pump or a bunch of tubing to get back to the intercooler and intake.
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95% of the guys who have rear-mounts will tell you they like them for these reasons:
1. Cheap.
2. Easy to install.
3. Doesn't clutter the already-tight engine bay.
4. Reaches their hp goals.
All are valid points, but most will readily admit that a front-mount will make more power and spool faster. The rest are delusional.
Mike
1. Cheap.
2. Easy to install.
3. Doesn't clutter the already-tight engine bay.
4. Reaches their hp goals.
All are valid points, but most will readily admit that a front-mount will make more power and spool faster. The rest are delusional.
Mike
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From: Star City, Arkansas
Well those are most of my points about wanting to run the system but the only thing that concerns me is the turbo lag. It just seems like there is a good chance that there may be a large deal of lag, esspecially if running a large turbo.
