Turbo'd Slant 6 apparently has no turbo??

[greendog]

if you want conversion info ..go talk with the guys at www.moparnuts.com ....ive done a few /6 swaps and its NOT half as hard as anyone makes it sound and its ALOT cheeper than you would ever realise

[DaytonaTurbo87]

A bigger turbo is capable of flowing more cfm's of air at a given pressure. That's why guys are putting bigger turbos on their cars, it's not just because they can boost higher it's that they flow better at a given boost level. That's why the grand national turbo is more suited for you application. I think you've got a good plan there, just set the turbo setup aside right now, do your paint, sell the smaller turbo, rebuild the grand national turbo and put everything back together.

On a side note, what year's your dart? Got any pics? I kinda miss my old dart but I got rid of it because it was just too rusty underneath, not strong enough to hold up to any kind of HP. Put the cash toward buying my satellite and haven't looked back since.

[finnman1]

well, as far as darts go, the later the year, the worse the body style... and it just so happens i have one of the latest years... a 74' ha ha, i bought the poop brown car about a year back. (dark burnt orange) now it's going to be plum crazy, poverty caps w/ purple rims, and sporting a "hemidart" hoodscoop because the stock hood has a big factory crease down the middle that i need to visually take away from. mine wasnt too rusty underneath due to the 1/2" thick oil 'mud' caked on from a leaky something or other. It was a grandma wilson grocery getter so $700 wasnt bad. we'll see how long the 7 1/4 rear hold's up after i get a higher stall converter and that garrett on there.

[Phreakish]

boost is boost, but it means nothing... Yes, 12 psi is 12psi and the airflow wont change between 12 psi vs 12psi...

BUT, if the compressor is ineffiicient, or you're choking the exhaust off by using a tiny turbine/housing, then NO WAY is 12 = 12... Two turbos that flow the same on the exhaust and can provide the same pressure at the same temp, equals the same flow and HP, but you choke the exhaust, or super-heat the incoming fuel/air, and now you wont make the same horsepower... get it?

Now, if you got a big 'ol huge exhaust side on that turbo, and upped the compressor size, it'd be wicked - but since its custom to begin with, may as well just go with the whole GN turbo instead of putting the GN compressor wheel on the T3 then adding a stage 2 or 3 turbine and getting a new housing.

[greendog]

hey now dont be dissin that hood its the "stock" hod for ALL 69 cuda's..the later darts just got an ugly nose put in front of that hood

as i see it your current setup is literaly choaking the engine at the intake and exhaust side...the slants LOVE to breath..the more flow they get on both sides the happyer they are..yes you "could" make what you have work but it would be cheeper to open it up by useing either 2 turbo's or 1 bigger one ..keep the 4brl but maybe swap to a carter afb since its going to be easyer to tune with a turbo and ALOT less leak prone

[greendog]

..

[turbovanman]

Quote:

Originally Posted by Phreakish boost is boost, but it means nothing... Yes, 12 psi is 12psi and the airflow wont change between 12 psi vs 12psi... BUT, if the compressor is ineffiicient, or you're choking the exhaust off by using a tiny turbine/housing, then NO WAY is 12 = 12... Two turbos that flow the same on the exhaust and can provide the same pressure at the same temp, equals the same flow and HP, but you choke the exhaust, or super-heat the incoming fuel/air, and now you wont make the same horsepower... get it? Now, if you got a big 'ol huge exhaust side on that turbo, and upped the compressor size, it'd be wicked - but since its custom to begin with, may as well just go with the whole GN turbo instead of putting the GN compressor wheel on the T3 then adding a stage 2 or 3 turbine and getting a new housing.

Actually 12psi isn't 12psi. It is the same pressure but different turbos can flow different air, example and making numbers up, you can have a Mitsu flow 10 lbs of air at 12psi, then you bolt on a garrett and flow 14 lbs of air at 12 psi, or a hybrid 50 trim and flow 24 lbs of air at 12psi, get it,

[mech1nxh]

Quote:

Originally Posted by Phreakish boost is boost, but it means nothing... Yes, 12 psi is 12psi and the airflow wont change between 12 psi vs 12psi... BUT, if the compressor is ineffiicient, or you're choking the exhaust off by using a tiny turbine/housing, then NO WAY is 12 = 12... Two turbos that flow the same on the exhaust and can provide the same pressure at the same temp, equals the same flow and HP, but you choke the exhaust, or super-heat the incoming fuel/air, and now you wont make the same horsepower... get it? Now, if you got a big 'ol huge exhaust side on that turbo, and upped the compressor size, it'd be wicked - but since its custom to begin with, may as well just go with the whole GN turbo instead of putting the GN compressor wheel on the T3 then adding a stage 2 or 3 turbine and getting a new housing.

good info as usual Phreakish..^^+1^^, correct me if I am thinking in error
1'st law of Physics, energy is not created just modified (paraphrase).......

and here we go into Bernoullis(spelling?) fluid Dynamics ......

[finnman1]

wow, i didn't mean to spark a debate or hurt anyone's feelings about the hood. i was told a while back the reason for the bigger turbo is the restriction on the exhaust and the hotter air from the smaller one, also larger boost #'s. i guess you learn something new everyday.
as far as that hood goes. that was MY Personal opinion. i don't mean to get belligerent, but you Dont see that im choking the engine. you dont see jack... i am running no exhaust. only a collector insert to quiet it down. so yes, there is a "big" exhaust. the intake is gasket matched with the head which is like wise ported on the int/exh runners....
the hood... youre right, the hood is about the same, but bolted above the grill there's a pointy piece of sheet metal that protrudes with the hood in an attempt to make it flush. the barracudas didn't have that, the had a sheetmetal front nose with 2 grille inserts. no pointy dick sticking way up in the air. i like the earlier barracudas as well, but if everybody liked the same body style or the same hood, the car manufacturers would figure it out and we'd all be driving the same car.. to each his own.

oh yeah, i'm running a draw thru so theres no need for a afb, i've never had a decent holley leak from vacuum.

[DaytonaTurbo87]

yeah my old dart was also a 74, so I know exactly where you're comming from. And on the side of that nose/more blah looking 74+ tail lights, I've seen a few guys swap on a hood, grill, bumper, valence, ect from a 70-72 dart, and done the same with the rear end. Looks sweet after, and 99.9% of people would never recognize that it's a clone rather than an actual 70-72 dart. I've seen a few guys do that with the 73+ dart sports as well, putting on the front end parts from an older dart and turning their dart sport into a demon!

Sold that dart and bought this for $600 more than I sold that 74 dart for, plus the satellite has next to no rust, and is 440.

[Phreakish]

Quote:

Originally Posted by turbovanman Actually 12psi isn't 12psi. It is the same pressure but different turbos can flow different air, example and making numbers up, you can have a Mitsu flow 10 lbs of air at 12psi, then you bolt on a garrett and flow 14 lbs of air at 12 psi, or a hybrid 50 trim and flow 24 lbs of air at 12psi, get it,

thats because of the amount of energy put into the flow by the turbo. 12 psi is 12 psi IF IT IS AT THE SAME TEMPERATURE and the rest of the engine is the same, AND the exhaust side is the same...

P = nRT where T is temp, n is mols, and R is a gas constant... rho (density) = P/RT (IIRC), again, Temperature is a big player...

The reason a mitsu wont push the same lbm/min of a garrett at the same psi is because the mitsu has to put more energy into the flow, and hence more heat...

[greendog]

i ment nothing by the hood realy..but in all seriousness theres only 2 small changes with that hood and a 69 cuda hood and there so small i doubt a points judge would even notice them LOL..as for the chokeing...a small turbo can and will choke the engine even if the exhaust on the other side of it isnt even there

as for the AFB comment i ment it for fuel leaks and such not to mention the fact that the secondarys will only open up under vacume meaning you cant realy over carb with them...and "if" you go to a blow thru its much easyer to put an AFB in a box since you wont have to contend with the fuel leaks