My turbo progress......slowly but surely

[Anonymous]

I have almost all of the big $$$ stuff now. I have my GN turbo(still needs to be rebuilt), carb bonnet off of a Buick, stock manifold I need to port, intercooler off a volvo, nitrous nozzle and noid for extra fuel, and a little of the piping. Okay I guess I am still lacking a lot! But I have my car apart trying to make the brackets for the turbo and piping for everything in the car. It's a little bit of work. Or maby I am just really lazy. :roll: I am excited about it but it just seems to be a little ways away before it will be running again. I need some motavation so I can just throw down on this thing and get it going. How is everyones turbo projects going? Anyones running or close to running?

Dan

 

[XFlow_Fairlane]

I just need to dig out my wire harness and finish it, make motor mounts, put head together and drop it on.

but thats for the 2.3L turbo

I might work on a turbo 170 just for the hell of it though.

 

[Anonymous]

I have most of the pieces for my turbo-250 project, but still lack a source of twin-siamesed LPG tanks and a stock 250 exhaust manifold. Somebody on this board promised me one, but I strongly suspect it's still sitting under his desk... :roll:

If it doesn't come by the time I find the LPG tanks I want, I guess I'll have to scrounge one from a junkyard.

 

[MustangSix]

Hmmm......maybe that someone is me! I'm sure I have an extra; let me see if I can find it in all the junk.......

 

[Anonymous]

Well my brothers drawthru turbo 200 was running until he over heated it! My dad built it for him and didnt really know what he was getting into. Just slapped the turbo on with out messing with the heads stock compression, he didnt even know what psi it was under.
Mine on the other hand is almost set up and ready to go. Ive got most if not all of the parts for it. just need to find the time. Dan, maybe to motivate one another, we can have a little race to the finish?
Ben

 

[Anonymous]

Not to worry, Jack, my grandson is only 3 years old and is still a few years from even a 'farm vehicle' license, so I've got some time to play with...

OTOH, if I can pawn my son off on a pro-team (keep yer fingers crossed!), I'll actually have some time to work on my own projects.

Another thing, the other day my wife announced that she knew what she was getting for Christmas...so I bit and asked, "what's 'at, Dear?" And she says a mill and a lathe!

Is she a keeper, or what?

 

[Anonymous]

Dan, maybe to motivate one another, we can have a little race to the finish?
Ben

Let's go! I will probably get beat bad. I am really slow!

Dan

 

[Anonymous]

Another thing, the other day my wife announced that she knew what she was getting for Christmas...so I bit and asked, "what's 'at, Dear?" And she says a mill and a lathe!

Is she a keeper, or what?

Does she have a cute sister that has a thing for young fat men?


-=Whittey=-

 

[Anonymous]

Does she have a cute sister that has a thing for young fat men?

Yes she does...and she's rich, cute, and single, too!

(I'm keeping her in reserve in case something befalls my duty squeeze... )

 

[yellowstang]

Ben and Dan,

I would be interested in your setup. I am looking at doing the same thing. which carb did you go with? I was over at the yahoo turbo group and read an article on carbs

It said to go with the 600cfm4bbl rather than the 390cfm 4bbl(based on cost). It said there would be too much pressure drop across the smaller Holley 500(350cfm) what did you use??

I'd love to share my ideas about routing, plumbing and the intercooler with you!!

 

[Anonymous]

Y-Stang,
Im using the Holley 500. Havent heard of the pressure drop problem, do you know why there would be one?
Im headed off to the shop right now to get the head mounted and make myself a carb plate.
Looks like Im in the lead Dan.
Ben

 

[yellowstang]

Ben

have you ever looked at things so long that you feel like you dont know what youre talking about??? carbs carbs carbs

confirm with me, the holley youre using is the holley 2300, 500cfm, non progressive carb. ----that is the one that want to use as well!!

there was an article about the pressure drop going thru the smaller 2 bbl compared to going thru a 4 bbl. the 4 bbl would present much less restriction to the air flow. but i guess the head would be the first thing we would consider hhhuh! hahahaha

anyway i have to make a phone call about a weber progressive. ive heard that a progressive would make the turbo experience much more funner!!!! not good enlish but you get my point!!

i was following your exploits in the previous forum. i was upset when all your posts got lost.

are you going to run an intercooler?? i havent done any fitting yet but i want fresh air to come in down the right side of the motor into the turbo. then straight back up the right side to an intercooler in front of the radiator. then it comes back down the left side of the engine then up the side and then over to the carb.

how much boost? 10??

what type of head work have you done? 1.75I 1.5E?? 1.6 roller rockers???

i am lining all my ducks up and sure am glad that i was able to get in
touch with you.

Pete

 

[Anonymous]

Pete,
Yes, the carb I have is not progressive.
Yes, I will be running it with an intercooler. Most likely located inside the right (passenger-side) fender. It should (hopefully) get enough ambient air.
Im using a modified (to use carb) 1980 head. With stock rocker arms, but I would very much like to get roller tiped 1.6 rocker arms later on down the road.
10 psi is about as much boost as a carb can handle, and what I'll be using.
Ben

 

[Anonymous]

Ben and Dan,

I would be interested in your setup. I am looking at doing the same thing. which carb did you go with? I was over at the yahoo turbo group and read an article on carbs

It said to go with the 600cfm4bbl rather than the 390cfm 4bbl(based on cost). It said there would be too much pressure drop across the smaller Holley 500(350cfm) what did you use??

I'd love to share my ideas about routing, plumbing and the intercooler with you!!

I need to get som pics up of the little work I have done. I don't know much about "pressure drop" that those people are talking about. I would not think it would be much of a problem. I will be using the 350cfm Holley carb. It is just like Ben's but a little smaller. I am also using an intercooler but mine is in front of the radiator. It is kind of BIG with the inlet and outlet on ether side of the radiator! It should work out good.

Dan

 

[Anonymous]

Im headed off to the shop right now to get the head mounted and make myself a carb plate.
Looks like Im in the lead Dan.
Ben

I guess I need to get to work! I need to make a bracket for my turbo so I can take it to get all the piping done. Man I don't want to spend a ton of money on the pipes. My friend and I talked to a guy who owns an exaust shop in town yesterday. He has a lot of full on drag cars and cool stuff like that. He said he needed some help with a turbo project of his own(TT EFI SBC in a 78Camaro) and maby we could traid out some work. So if I can get all the piping done for little or nothing that would rule! I have a question for you. Why do you say 10psi will be max for a carb? Later man.

Dan

 

[Anonymous]

10 PSI is about the max amount of pressure a carb can still mix fuel with, any higher the A/F ratio can get too lean.

 

[Anonymous]

A 4bbl carb is measured at 1.5inHG pressure drop (inches of mercury) and a 2bbl carb is measured at 3inHG. Thats why a 500cfm flows around the same (I think a little less, but I could be wrong) than a 390cfm 4bbl at any given pressure drop. On a blowthrough turbo, you should size the carb about the same as you would a N/A motor. You're increasing the density of the air, not the volume (though there should be a slight increase in volume as well). On a drawthrough system, you have to factor in amount of boost as well, because all the carb is seeing is a larger motor.


-=Whittey=-

[edit] You can go higher than 10psi on a carb. Without a carb box, 20psi is about the limit. With a carb box, have fun. A carb works off a pressure drop through the venturi. There is always going to be that pressure drop, which will always cause fuel to flow. After that its a tuning issue.

 

[Anonymous]

Correct me if Im wrong, but the density of the air refers to how much oxygen is in the air (cooler air=more O2 per cubed area= higher density, warmer air=less O2 per cubed area=lower density) the volume of the air does change that is how you get the pressure increase.
Ben

 

[Anonymous]

okay, time for a chem(really physics, but i learned it in chem aobut a month ago)

pv=nRT

where p is the pressure of the gas in atmospheres, v is the volume in liters, n is the number of mols(a counting number, there are 6.022x10^27(?) atoms in a mol) R is a constant .08206, and T is the temperature in kelvin.

it can be rewritten as p=(nrt)/v

so basically, the more volume you have the less pressure you have, and the more pressure the less volume, assuming you have the same number of mols or particles(basically the same thing for all intents and purposes).
what a turbo does is compress a given amount of air into a smaller volume, hence increasing its pressure.

now density=m/v, where m is mass, and v is agian volume. now remeber, since the mass of the air doesnt change, when the volume gets smaller your density goes up.

maybe that will answer some questions.

 

[Anonymous]

thats what I said. except in my own understanding of Laymans terms.