Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

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Old May 26, 2010 | 05:08 PM
  #1  
zenith013's Avatar
zenith013
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Default 289 power

Right now I have a 67 with a 289 and (shockingly) I'm looking for more power.

It is all stock with the exception of a 4 barrel Edelbrock carb

I've looked around for engine parts and came across the Edelbrock Performer Package and I'm also looking at Tri-Y headers
(http://www.summitracing.com/parts/EDL-2091/)

I have a 3 speed manual and I'm not sure about the rear end (most likely "stock" :P)

What's the best way to get anywhere between 300-350 bhp out of a 289? Maybe around 325 ft/lbs torque and up

Will I have to replace the running gear?

I plan to use this for daily driving with a bit of extra "omph"

Last edited by zenith013; May 26, 2010 at 05:14 PM.
Old May 26, 2010 | 05:23 PM
  #2  
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Ok before we begin...

When you say HP numbers are we talking about at the flywheel or to the rear wheels?


EDIT: oh i see bhp

that kit will get you way beyond 300bhp :O
I'd say even 350bhp
Old May 26, 2010 | 08:34 PM
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300 to the wheels. Probably about 285bhp to the backwheels minimum

Originally Posted by nba1341
that kit will get you way beyond 300bhp :O
I'd say even 350bhp
Sweeeeet
What would be the most cost/work efficient way other than the edelbrock kit? I'm interested to hear the different ways this can be done. My apologies if this has been asked a million times. At least it's not an I6 to V8 conversion thread

I already want to put on Tri-Y headers and a flowmaster exhaust system
Also, what is an AFR 165? I hear it really performs for headers.
I prefer bolt-on replacements (heads, intake manifolds, etc.) to stroking/boring, but I'm not closed minded to a good deal.

Last edited by zenith013; May 27, 2010 at 01:15 AM.
Old May 27, 2010 | 01:35 AM
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I have the Edelbrock setup on mine and an very pleased with it. It has plenty of power to motivate my coupe down the road.

I reccomend staying away from chambered Flowmaster crap. It does not flow all that well, drones/resonates inside the car like hell, and sounds hollow. Besides that it sounds all wrong on a classic. Go with straight through Magnaflow or Dynomax Ultraflow.

Last edited by tx65coupe; May 27, 2010 at 01:39 AM.
Old May 27, 2010 | 02:08 AM
  #5  
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consider a rear end upgrade - often better bang for buck than engine to lower your gearing to say 3.55 (its probably 3.00)

also be wary bolting on power if your existing engine is old/tired. it will work but also puts a lot of strain on the old parts which can effectively accelerate the need for a full rebuild. sometimes you may be better off saving the pennies in the first place but thats your call.

As far as the rest of your running gear, 350hp will make short work of your axles in a stock rear too. Not a big deal but one to be aware of. Make sure you have decent brakes and put some effort into your suspension to get the most use out of your extra hp.

have fun!
Old May 27, 2010 | 07:22 AM
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A rear gear upgrade could help out alot depending on what it currently has. However, I would not go more than 3.20 gears with a non OD trans.

I also agree that some upgraded front brakes would be a good idea with more power. It would be nice if it could stop fast too. I suggest Granada or the OE type front discs.
Old May 27, 2010 | 08:03 AM
  #7  
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you selected the 1.9 intake valves (instead of 2.02). that's what you should stick with. the bigger 2.02 will not match.
The problem I see is that the heads and cam it has. I had the same cam and that makes power right up to 6500. spinning crazy. But a stock bottom end will not do that. I wouldn't trust a stock engine rotating assembly well past 5500rpm.
maybe it would be a good idea to change the conrod bolts to ARP (machine shop) ...anyone else with the same opinion?
Old May 27, 2010 | 06:54 PM
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Originally Posted by tx65coupe
A rear gear upgrade could help out alot depending on what it currently has. However, I would not go more than 3.20 gears with a non OD trans.
IMO depends on your daily commute. if its a lot of highway i'd agree with tx65 and I'd be looking to go OD anyway. In my situation I do almost all country (bends and hway) but she's not a dd so i was a bit worried when I went to change from 3.00 to 3.55. However the lift in performance was always going to be a trade off for gas mileage whether you do gearing or motor improvements. IMO i reckon it was well worth it.

Here's the differences - assuming a 215/60/15 tyre 3.00 gears at 65mph will have you around 2600rpm in top gear. 3.2 = 2780, 3.55 3080.

you can muck around with the gearing calcs yourself http://www.corral.net/tech/gearcalc.html
I havent checked them all but most 4ths are 1:1. The 5th ratios are quite variable.
Old May 27, 2010 | 07:38 PM
  #9  
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I've got the $200 front discs and a bit of suspension work at the moment.

Overdrive is a while away.

Tx65, what exactly have you done with your drivetrain? Do you go to
the strip or just the street?

http://www.rpmmachine.com/ford-302-331-stroker.shtml
What are the advantages/disadvantages of the rpm 331 stroker kit? Will I get comparable power from the kit?


Thanks for the answers
Old May 27, 2010 | 08:49 PM
  #10  
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there's no replacement for displacement
adding a stroker kit with all else being equal will add torque more so than hp.
but that's what most people really want anyway - its that "push you back in the seat" feel.

this will come down to how much you want to spend.
the head should tell you to do brakes, suspension, diff/gbox then engine.
the heart usually says "gimme some grunt right now and sort the important stuff out later"

btw the heart usually wins even when you think you've learnt your lesson



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