Kinda new to classic motors question

SVTdriver · Jan 31, 2004

Would boss 302 parts work on a 66 289 block?

SuperDave · Jan 31, 2004

Sure, but specifically which parts?

allcarfan · Jan 31, 2004

you have parts from a boss 302?! why not build a boss 302 rather than wasting your time putting them on/in the 289.

As SD said...what parts?

SVTdriver · Feb 1, 2004

I haven't got any parts yet. But I have seen them for sale several times. It's just when I find them it's usually heads, intake, carb. No block. I'm debating what kind of motor to put in my 66. Don't know whether to go carbed, injected, or switch alotgether to a 4.6 mod motor.

jcp123 · Feb 1, 2004

it's easiest to go carb'd, that's what i'd do if you're new to these cars. 4.6's are pretty hard to put in since they're really too wide for the engine bays. an injected 5.0 isn't too too hard though, if that's what you really want, and there's plenty of ppl who have done it who can help you out if you wanna do it

SVTdriver · Feb 1, 2004

Engine bay space is something I can deal with. I have been looking at a couple of different conversions for front suspension. Since I want more modern handling anyway. My biggest issue with carbs is that is what is on the car right now. And I don't know how to tinker with them. So I'm getting about 12 mpg. And I'd like that number to rise.

allcarfan · Feb 1, 2004

first of all, i wouldnt buy boss 302 parts for a 289.

A mod motor engine will require you to either cut back the shock towers a few inches or remove them completely to do a mustang II front Suspension swap. Those are about your only options for a mod motor or a big block.

You have to ask yourself what you want to do with your car...show, cruiser, racer, etc etc. Then you can go from there. You can have a 250hp high revving 289, a 400 hp daily driver 302, or a stroked 351w that is a torque monster.

12mpg isnt that BAD in a carbed classic mustang. An EFI conversion is quite easy and can be done from junkyard parts, but any future modifications get expensive....ie - computer upgrades, injectors, TB, aftermarket intake costs $400 easy.

Good luck with whatever you decide.

D.Hearne · Feb 1, 2004

If you're concrened about fuel mileage, then forget Boss 302 heads on your 289. For them to work correctly on it, you'd need to have it spinning somewhere north of 6000 rpms. Not exactly fuel friendly heads.

dodgestang · Feb 1, 2004

SVTdriver said:
I haven't got any parts yet. But I have seen them for sale several times. It's just when I find them it's usually heads, intake, carb. No block. I'm debating what kind of motor to put in my 66. Don't know whether to go carbed, injected, or switch alotgether to a 4.6 mod motor.

You would be better served and get better overall performance by going to the aftermarket for parts.

Here is a simple equation to help decide which parts are worth it (at least its how I do it):

Theorical Horse Power Gain
________________________________ = X
Cost of the part + cost of additional
items nessecary just to use the part

Additional parts would be something like this: if you see Boss302 heads for sale for $900 you would also need to factor into the price the cost of the special intake needed to run the heads. Where as, if you look at Aftermarket aluminums you just need to look at the cost of the heads compared to their price since you can later match up any intake you want to optimize the whole package.

Then you can easily compare the Boss302 parts to the aftermarket. Off course the more accurate you can approximate the HP gains the more accurate your comparisons will be

It also helps to set a budget in mind and a plan for HP and/or MPG BEFORE you start buying and building. This will 'keep it real' and help you get a matched combo as opposed to dropping say $2k into the heads and then strapping a performer intake to the top with your old stock 289 carb and cam because you blew your wad on the heads

calpolymustang · Feb 2, 2004

buy some AFRs, not BOSS. BOSS are cleveland heads made for special small blocks that have re-routed cooling systems. yes they will bolt on, but they wont work without machining. If you have a 289 block use that crank if you want to keep it cheap. Or have the mains splayed and drop in a 347. If I were to start from scratch Id go with a 5.0 or 347'd 5.0 in my 66 fastback. boss heads will mean a $400 intake manifold and expensive exhaust.

If you want to go to a torq-SBF, get a 351. Plan to have less room in the compartment though

I have a 9.3:1 289 with ported stock heads and a .490'' cam. A 600cfm edelbrock feeds a med-rise dual plane. 2.25 dual exhaust with h-pipe and 2chambers. i get 17mph on the hwy with a 3.40 posi behind a C4. electronic ignition and 38degress total timing

D.Hearne · Feb 2, 2004

Boss 302's didn't have re-routed cooling systems. They were setup the same as the rest of the small blocks. The Clevelands had a different routing for the coolant.

'69Stang · Feb 2, 2004

First of all Boss 302’s were not the greatest performers for a street vehicle, the heads were just too big for the application. Secondly, if you were to go down that route it would be more economical to just buy 351 Cleveland heads since they are essentially the same and will run you probably half to a third of the price.

But don’t even go down that road. 4v Cleveland heads are borderline too big for a 351, let alone a 289. I wouldn’t even consider putting Cleveland heads on anything less than a 351. The best thing you could do if you are going to leave that engine at 289 CID is to get a set of AFR 165cc heads. Best bang for the buck for a smaller displacement engine. Unless you own a Cleveland or are a Cleveland fan(atic) forget about them. The after-market has developed better and more efficient heads for the Windsor in the last 30 years.

Also, carbs are great. Get a Holley book and learn to tinker with them, it isn't that hard.

D.Hearne · Feb 2, 2004

[QUOTE='69Stang]First of all Boss 302’s were not the greatest performers for a street vehicle, the heads were just too big for the application.[/QUOTE]
Not to nit-pick, but have you ever rode in an original Boss 302? I did once back in the 80's when I had a 427 Stang, and I was definately impressed with that Boss. That thing hauled butt. Even for someone who was used to a daily driven big block Stang. The Boss I rode in was also basically stock, with only headers to improve it. But I also agree that he'd be better off with smaller heads on his 289.

SVTdriver · Feb 2, 2004

I want to see 400+ hp.

MrBobMarley · Feb 2, 2004

What's your budget on this man?

For 400 hp, I'd go turbo in a heartbeat, money not being much of a concern though. Otherwise, I'd go for a Coast High Performance 347 stroker, weiand stealth intake, some long tubes, and I'm not sure which cams and carb would be needed to get you there.

But the turbo would kick ass.

SVTdriver · Feb 2, 2004

I may eventually go turbo. But I would like to see 400 before any power adders.

MrBobMarley · Feb 2, 2004

http://www.hotrod.com/techarticles/42798/index.html

twin turbo 66-65 fb. Runs 11's at 11psi on pizza cutter 215's. Oh yes....this car rocks.

SVTdriver · Feb 2, 2004

Very true. But I imagine the tuning on that was extensive. And it doesn't tell me what he used to build that motor.

MrBobMarley · Feb 2, 2004

Building a turbo stang really isn't as complicated as people will have you think. Thats why companies want to charge us $6000+ for a kit (late model). My buddy just installed a t-60 kit on his 97 gt, cost him $6000 and he put it all on himself in a matter of days. Once he had it though, he now regrets spending that much, learning that he could have welded his own pipes, headers, etc. The only real costs would be the actual turbo, wastegate, and an SCT chip burning program.

The turbo route to me would only make sense if I was injected, however I don't know a whole lot about the carbed turbo setups. As far as your tuning concerns man, I understand that, but it really isn't that out of reach. A lot of the tuning is actually done on the software with the chip burner, granted you're injected.

My buddy and I are still tweaking little things here and there. The turbo is based on a bone stock block too. He's running 8-9 psi and dynoed 297hp and 404tq. I know that's not at all impressive, that's why we're tweaking things with the chip. It's really cool, I'm actually thinking of going mod motor myself now.

disclaimer: I am not a turbo wizard, I just know a little.

SVTdriver · Feb 2, 2004

That's my problem. I don't know whether to stay with the pushrod or go mod.

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