So after basic bolt ons...
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So after basic bolt ons...
such as intake and efi manifolds ...how many horeses you think this adds,,with and without a two barrell carb...
thanks...
thanks...
Last edited by Caleb1; May 16, 2005 at 07:26 PM. Reason: cause i can....
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I'm no expert...yet, but the whole hp quest seems like a symbiotic system. To see gains worth a darn, you need to do multiple things that work together.
Adding better airflow? You're going to want more fuel up in there. Got more air and fuel in there? now it needs to evacuate quickly with little backpressure. And on and on it goes.
Normal bolt ons can get you a good boost, if you do things in a manner that ensures each bolt on works well with the others.
I'd look at intake, fuel, and exhaust bolt ons as one system, plan it well, buy the parts as budget allows, and then when I had it all together, I'd bolt it all up together. JMHO
You'd probably pull between 35 and 55 ponies with very minor work, and then you'll want more so you'll look into a cam and head work and on and on and on....
I vote to keep it as a system, move slowly and plan things out.
Flip
Dunno if that's the answer you were looking for or if you wanted:
1bbl carb + Headers + Intake + 3" pipe = 40hp boost
But I think looking at it that way is ok, if you're planning it as a system, not individual parts.
Adding better airflow? You're going to want more fuel up in there. Got more air and fuel in there? now it needs to evacuate quickly with little backpressure. And on and on it goes.
Normal bolt ons can get you a good boost, if you do things in a manner that ensures each bolt on works well with the others.
I'd look at intake, fuel, and exhaust bolt ons as one system, plan it well, buy the parts as budget allows, and then when I had it all together, I'd bolt it all up together. JMHO
You'd probably pull between 35 and 55 ponies with very minor work, and then you'll want more so you'll look into a cam and head work and on and on and on....
I vote to keep it as a system, move slowly and plan things out.
Flip
Dunno if that's the answer you were looking for or if you wanted:
1bbl carb + Headers + Intake + 3" pipe = 40hp boost
But I think looking at it that way is ok, if you're planning it as a system, not individual parts.
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Joined: Apr 2005
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No no no, those aren't real figures there partner:
Sorry to have mislead you. I was saying that I think the only true way to look at gains is by focusing on a set of systems and going from there(i.e. don't just slap on a manifold, also add an exhaust and a better carb. i.e. don't just slap in a performance cam, also get the head machined or replaced).
If you just start bolting things on one at a time you'll not be as happy as if you do the entire system through careful planning and patience. I have a setup I'm working on at the moment that focuses on mild hp gains with a main focus on increasing the tq throughout the powerband, I'll post it up once it's complete and then will make a post once I acquire the parts and begin my install. But you don't need to wait on me, you can do the same thing.
Got a speed shop in your area? Go there and get busy talking to the guys behind the counter, try to find a ford nut(there'll be one), and then you have a sounding board for your planning bro.
Flip
Sorry to have mislead you. I was saying that I think the only true way to look at gains is by focusing on a set of systems and going from there(i.e. don't just slap on a manifold, also add an exhaust and a better carb. i.e. don't just slap in a performance cam, also get the head machined or replaced).
If you just start bolting things on one at a time you'll not be as happy as if you do the entire system through careful planning and patience. I have a setup I'm working on at the moment that focuses on mild hp gains with a main focus on increasing the tq throughout the powerband, I'll post it up once it's complete and then will make a post once I acquire the parts and begin my install. But you don't need to wait on me, you can do the same thing.
Got a speed shop in your area? Go there and get busy talking to the guys behind the counter, try to find a ford nut(there'll be one), and then you have a sounding board for your planning bro.
Flip
Postmaster
Joined: Feb 2003
Posts: 3,439
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From: Spokane WA
carb:
1bbl carter-Yf from a 1970 F350, manual choke, TOMCO part # 1286
exhaust:
1987-1996 exhaust manifolds
shortblock:
stock 1984 with steel timing gears
head:
stock 87 EFI head
distributor:
77-79 F350 big cap, single vacuum advance, blue duraspark box.
aircleaner box:
any 70-83 car box from a 200/250 6cyl 1bbl.
fuel pump:
65-69 F350 2wd dually with pump mounted fuel filter
aftermarket camshaft: this cam is only about $60
PAW/SSI part #113129
204/214 @.050, advertised 270/280 .451/.475 lift
It's never been on a dyno but it can rip the tires off the truck in 1st and 2nd.
There is a 3/4 mile long 12% grade with a stop sign at the bottom (Rambo road hill if any NW/spokane guys read this ) I can hit the top at 60mph from a dead stop shifting into 2nd @ 35mph, and 3rd @ 45mph. thats in a 79 F150 with 3.50 gears
1bbl carter-Yf from a 1970 F350, manual choke, TOMCO part # 1286
exhaust:
1987-1996 exhaust manifolds
shortblock:
stock 1984 with steel timing gears
head:
stock 87 EFI head
distributor:
77-79 F350 big cap, single vacuum advance, blue duraspark box.
aircleaner box:
any 70-83 car box from a 200/250 6cyl 1bbl.
fuel pump:
65-69 F350 2wd dually with pump mounted fuel filter
aftermarket camshaft: this cam is only about $60
PAW/SSI part #113129
204/214 @.050, advertised 270/280 .451/.475 lift
It's never been on a dyno but it can rip the tires off the truck in 1st and 2nd.
There is a 3/4 mile long 12% grade with a stop sign at the bottom (Rambo road hill if any NW/spokane guys read this ) I can hit the top at 60mph from a dead stop shifting into 2nd @ 35mph, and 3rd @ 45mph. thats in a 79 F150 with 3.50 gears
Last edited by oldhalftons; May 17, 2005 at 06:57 PM.
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Joined: Sep 2003
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I run a heated clifford manifold w/ a motorcraft 2150 2V and EFI's with a single 2 1/2" thru a dynomax out the back. Ignition I run a stock DSII and I think I am getting about 230 HP.It all bolted up and works great.
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Postmaster
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From: Broken Arrow, OK
Originally Posted by javi2001
Magic word... how much is little backpressure??? how much is stock???
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Joined: Feb 2003
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From: Spokane WA
Originally Posted by javi2001
1 - 2 psi??? (Punds squar inch??) are you sure???
As far as I know, back pressure is messure using in/Hg (Inchs of mercury) units...
As far as I know, back pressure is messure using in/Hg (Inchs of mercury) units...
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From: Venezuela
Well there is some confussion here...
in/Hg is just another messuring unit, so pressures can be positives or negatives (know as vacum...)
Positive pressures can be as high as the system can compress BUT negatives pressures (Vacum) can be just as low as atmosphere can be, it means; no more than 14.7 psi
Vacum readings for intake manifold are usually messure using in/Hg but there are conversion tables to use any pressure unit like Pascals, psi or even in/H2O.
I'm used to work with Heavy Cummins diesel engines and the maximun back pressure can be 2 in/Hg, after that point engine start lossing power so, 1- 2 psi is TOO MUCH, at least for industrial engines.
Maybe for On Higway applications 1- 2 psi could be a normal value, since there is muffler, long pipes, catalizers, etc, etc. I don´t know but I guess I'll need make some more research in this area...
in/Hg is just another messuring unit, so pressures can be positives or negatives (know as vacum...)
Positive pressures can be as high as the system can compress BUT negatives pressures (Vacum) can be just as low as atmosphere can be, it means; no more than 14.7 psi
Vacum readings for intake manifold are usually messure using in/Hg but there are conversion tables to use any pressure unit like Pascals, psi or even in/H2O.
I'm used to work with Heavy Cummins diesel engines and the maximun back pressure can be 2 in/Hg, after that point engine start lossing power so, 1- 2 psi is TOO MUCH, at least for industrial engines.
Maybe for On Higway applications 1- 2 psi could be a normal value, since there is muffler, long pipes, catalizers, etc, etc. I don´t know but I guess I'll need make some more research in this area...
Postmaster
Joined: May 2002
Posts: 3,241
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From: Broken Arrow, OK
Ummm.....1psi=2 in/Hg.
On a diesel the backpressure is more of a concern for a couple of reasons. First, they are not throttled and run wide open all the time. This makes the exhaust system a big area of concern. In a gas engine the exhaust is typically not the biggest restriction. Second, any backpressure down stream of the turbo (if equipped, most are now days) causes a decrease in the pressure drop across the turbo which makes it spool slower and produce less boost.
Vacuum can be lower than absolute zero, but the pumps required to make it happen are few and far between. In order to simplify our lives we typically use gauge units instead of absolute. This automatically compensates for changes in atmospheric pressure.
On a diesel the backpressure is more of a concern for a couple of reasons. First, they are not throttled and run wide open all the time. This makes the exhaust system a big area of concern. In a gas engine the exhaust is typically not the biggest restriction. Second, any backpressure down stream of the turbo (if equipped, most are now days) causes a decrease in the pressure drop across the turbo which makes it spool slower and produce less boost.
Vacuum can be lower than absolute zero, but the pumps required to make it happen are few and far between. In order to simplify our lives we typically use gauge units instead of absolute. This automatically compensates for changes in atmospheric pressure.
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