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Author
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Topic: 302-4V Horsepower?
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Rickyrod1
Journeyman Posts: 39
From: San Antonio, TX, USA
Registered: May 2004
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posted 01-25-2005 10:35 PM
 
I am in the middle of my new rebuilt engine. I have chosen the following setup:Edelbrock Camshaft with Lifters 2122
Edelbrock Performer Intake Manifold 2121
Edelbrock Carburetor 600 Electric Choke 1406 What kind of horsepower should I expect? No other upgrades at this point. I am considering the installation of Tri-Y headers although I am not sure what impact will it have on HPs. I will really appreciate a response since I am getting pretty hopeful at this point. ------------------
Ricky
1970 Convertible-302-2V-3-speed-Auto
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mustangs68
Moderator Posts: 27681
From: Hampton Va MCA#39406 M&M #12 Member Mustang Club of Tidewater
Registered: May 99
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posted 01-25-2005 11:00 PM
Ok you put more air and fuel in the engine now you need to get it out,headers are the best "bang for the Buck" when trying to make HP,without headers and a good dual exhust system it will be "bottled up".Sorta like wear one tennis shoe and a Loafer 
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 01-26-2005 05:24 AM
The old rule with small block Fords is that you need to work on getting the air out before trying to get more in. Your engine won't be able to utilize all that new air coming in via the four barrel unless you give it a way to get the old air out.Definately do the headers first. Any talk of horsepower gains would be pointless until you do that. Scott
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indyphil
Gearhead Posts: 3394
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 01-26-2005 09:36 AM
Ricky
I have a 289 in 68. Went from 2 barrel to 4 barrel and it was night and day - and I have no headers. My car is making around 200hp (runs high 15's in the 1/4)
600 carb (like yours)
unknown cam but must be stock or close to it
stock 66 heads
stock cast iron log headers
performer intake (like yours)
dual exhaust
electric fanMy car bone stock as a 2 barrel should be in the 17's in the 1/4 mile and although came with an advertised 190-195hp that was before SAE ratings. It was probably lucky to have 160 REAL hp from the factory. I imagine with your cam, and the extra 13 plus cubes, you are probably making an honest 210 depending on which accessories you have. Headers are typically worth about 20hp, depending on the type. Tri Y headers are made for mid range torque (3000RPM), they dont produce as much low end grunt (1500RPM) or top end hp (6000RPM+) as a good set of long tubes. Some folks call them "why try's" because they are usually outperformed by long tube headers. ------------------
'68 coupe, '66 289 C code
engine, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm
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Dreamcometrue
Gearhead Posts: 903
From: New-Brunswick,Canada
Registered: Apr 2004
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posted 01-26-2005 10:36 AM
Hi Ricky. Something else you may want to consider is replacing your worn points by an electronic module like a Pertronix II. I also got a great improvement by just replacing the spark plugs by Motorcraft (Ford) original ones. Next will be the coil and new wires.
Rino  ------------------
'69 coupe 302 with a C-4 3:00-1 gears
Edelbrock Performer RPM intake, Holley carb, K&N air filter
Dual exhaust with Ravin z-55 mufflers Pertronix II
Member# 3729http://mustangsandmore.50megs.com/MembersPics/Dreamcometrue.html
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kinger44
Gearhead Posts: 376
From: Waterloo, Ontario, Canada
Registered: Sep 2004
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posted 01-26-2005 02:29 PM
Another 68 here. I did Pertronix points replacement, coil, and headers. What a difference! Not even the same car. The car came with Edelbrock intake and 4bbl. Once we replaced the plugs and did some other work to get the thing running decently it was reasonably quick. Then came the headers, X pipe and duals - BIG improvement. A few weeks later we did the Pertronix stuff - I did it mainly for convenience and reliability, but again ANOTHER performance kick! Better starting, but much stronger performance. If anybody out there knows any other ways to kick it up a few HPs, let me know! Cheers Gregg ------------------
68 coupe
red on black
289
flowtech ceramic headers
hedman X pipe
flowmaster 2 chambers
edelbrock 4 brl and intake
Cragar SS with BFG t/a
and a working 8 track for cruising days!
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Rickyrod1
Journeyman Posts: 39
From: San Antonio, TX, USA
Registered: May 2004
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posted 01-26-2005 11:34 PM
quote:
Originally posted by kinger44:
Another 68 here. I did Pertronix points replacement, coil, and headers. What a difference! Not even the same car. The car came with Edelbrock intake and 4bbl. Once we replaced the plugs and did some other work to get the thing running decently it was reasonably quick. Then came the headers, X pipe and duals - BIG improvement. A few weeks later we did the Pertronix stuff - I did it mainly for convenience and reliability, but again ANOTHER performance kick! Better starting, but much stronger performance. If anybody out there knows any other ways to kick it up a few HPs, let me know! Cheers Gregg
I installed Pertronix about 3 months ago. Very clean and much smoother acceleration. ------------------
Ricky
1970 Convertible-302-2V-3-speed-Auto
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Rickyrod1
Journeyman Posts: 39
From: San Antonio, TX, USA
Registered: May 2004
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posted 01-26-2005 11:50 PM
quote:
Originally posted by mustangs68:
Ok you put more air and fuel in the engine now you need to get it out,headers are the best "bang for the Buck" when trying to make HP,without headers and a good dual exhust system it will be "bottled up".Sorta like wear one tennis shoe and a Loafer
I installed dual Flowmasters as a replacement to my single muffler system. They are hooked to the original manifold. I wonder what can be the best header for a low price?
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Ricky
1970 Convertible-302-2V-3-speed-Auto
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74merc
Gearhead Posts: 1322
From: Demopolis AL
Registered: Jun 99
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posted 01-27-2005 12:44 AM
Everyone seems happy with Hooker Competition headers.
Cheap and good. About $150.On mine, 4bbl Holley made a huge difference, and I was still running factory exhaust. It kept getting better as I added duals and later headers and 1 inch spacer. Otherwise, stock 74 engine. Even low compression liked a four barrel carb.
I wish, in hindsight, I had done it the other way around, but I didn't know as much about the small block Ford then. Hell, I didn't have a computer or any source to read up on it.
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indyphil
Gearhead Posts: 3394
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 01-27-2005 09:44 AM
Flowtech are virtually the same as the hooker comps, for the 68 they are $99, or $200 for ceramics. Lots of folk I knew back in Indiana had run them and liked them - and a bargain of a price. Not sure about your '70 in terms of fit, youll have to check on that...------------------
'68 coupe, '66 289 C code
engine, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm
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thoward40
Journeyman Posts: 5
From: Memphis,tn.usa
Registered: Jan 2004
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posted 01-31-2005 09:56 PM
What kind of coil are guys putting in your cars? I had my 302 rebuilt .030 over with Edelbrock cam, Performer intake and 500cfm carb. I too will be putting in a Pertronix but am interesed in the coil options as mine in stock.
Thanks
Trevor------------------
Trevor
69 Fastback 302
Yellow/black
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Rickyrod1
Journeyman Posts: 39
From: San Antonio, TX, USA
Registered: May 2004
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posted 01-31-2005 10:27 PM
quote:
Originally posted by thoward40:
What kind of coil are guys putting in your cars? I had my 302 rebuilt .030 over with Edelbrock cam, Performer intake and 500cfm carb. I too will be putting in a Pertronix but am interesed in the coil options as mine in stock.
Thanks
TrevorI installed teh Pertronix coil to ensure better performance.
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Ricky
1970 Convertible-302-2V-3-speed-Auto
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