350hp!!

Topic: 350hp!! (Read 11281 times) previous topic - next topic

Reply #45 – November 01, 2007, 01:17:05 AM

If you think you need a person to overhaul your transmission I know a very good guy in Olympia. Excellent work for a very fair price. He only works on transmissions out of the car. If you want his name and number send me an email.

TED

350hp!!

Reply #46 – November 01, 2007, 10:14:10 AM

The "Birdman" posted this link today and it shows what you can do with a pretty mild combo and 3.55 gears.

http://www.popularhotrodding.com/events/0711phr_nmca_drag_racing_event/1983_ford_thunderbird.html

Why can't you swap to a 351 and still keep the number matching 5.0 in the garage?

One thing you have to worry about in Pierce county is emission testing, what are you going to do here?

TED

350hp!!

Reply #47 – November 01, 2007, 02:34:18 PM

how much does bad bird want for his 342? if he sells it for around $3000 i'll snag it!

well, my dad also said he didnt want a bigger motor in it. so if i can keep a 302 block but stoke it, he'll never know!:evilgrin:
CAD, that would be great if you can get me that guys number! send me a PM

for you for the help!
whats the difference between a lock up and a nonlock converter?

350hp!!

Reply #48 – November 01, 2007, 02:35:01 PM

i plan on running 3.73 gears. with a 8.8 mustang rear. im also going to buy a set of drag radials.

350hp!!

Reply #49 – November 03, 2007, 12:06:43 AM

Quote from: quicksilver;185780

how much does bad bird want for his 342? if he sells it for around $3000 i'll snag it!

well, my dad also said he didnt want a bigger motor in it. so if i can keep a 302 block but stoke it, he'll never know!:evilgrin:
CAD, that would be great if you can get me that guys number! send me a PM

for you for the help!
whats the difference between a lock up and a nonlock converter?

I believe badbird is asking $2700 for the short block. Remember a short block does not come with heads, but this one is a true short block with an oil pan and cam. Some "short blocks" don't come with either. You would have to come up with more money for the heads he has. Those Canfields are probably some of the best flowing heads from anywhere. Even if you have to use a stone stock set of e7 mustang heads, on that short block it would still be mean. Also remember there is no replacement for displacement when it comes to power especially on the street. What is really killer about his setup is the pistons are fly cut for inline valve cylinder heads or twisted wedge. You can put whatever heads you want on there. If I had the extra cash, no doubt I'd jump on it. Maybe it will still be around next year :hick: Check out the thread in the for sale section on 342 for sale. BTW here is his number
Ron 734-776-5987.
Good luck, I hope you can get it.

Mike

350hp!!

Reply #50 – November 05, 2007, 06:24:42 PM

i have a question
should i just go with a stock HO and run a supercharger on it? im looking at like a vortech s trim.9lbs of boost. and maybe a 75 or a 100 shot of giggle gas?

350hp!!

Reply #51 – November 06, 2007, 02:26:20 AM

no ones really mentioned why you ,,quote unquote,, should not get into a 347 kit. Briefly mentioned was that fact that the life of the block will be effected by using the 347 vs the 331.

with the constant rev of a 347, your unavoidable ratio called rod angle will wear the center of each cylinder bore out quicker than a 331 or stock 302 innerds. if you like your block and i know you'll have your foot in the gas, then 347 is good for the person who really doesnt mind coming up with a block and pistons every now and again.

im sorry man,, i just kind of worry about people interested in the 347 kit and not being aware of rod angle.

the 331 is the way to go but engineer this and listen to guys who've had many combos and share their experience. I have very little to share in that department,, but from what i just bought off turbocoupe50 and what im buyin now, i should have a little to offer sooner than later.

350hp!!

Reply #52 – November 06, 2007, 02:28:13 AM

Quote from: quicksilver;186343

i have a question
should i just go with a stock HO and run a supercharger on it? im looking at like a vortech s trim.9lbs of boost. and maybe a 75 or a 100 shot of giggle gas?

well,, you just took care of your top end,, now whatcha gonna do off the line?,,,unless your gonna run the sc full duty like i just whitnessed in a stang down in morganton nc,,, now that thing was just too hard to keep on the road not to mention constant babby sitting of the gas pedal while at stops.

350hp!!

Reply #53 – November 06, 2007, 07:52:16 AM

Quote

your unavoidable ratio called rod angle will wear the center of each cylinder bore out quicker than a 331 or stock 302 innerds. if you like your block and i know you'll have your foot in the gas, then 347 is good for the person who really doesnt mind coming up with a block and pistons every now and again.

Rod angle is proportional to rod/stroke ratio.

As far as rod/stroke ratio with a 5.4 rod:
331 = 5.4 / 3.25 = 1.662:1
347 = 5.4 / 3.4 = 1.588:1

For the 5.315 rod:
331 = 5.315/3.25 = 1.635:1
347 = 5.315/3.4 = 1.563:1

Many motors come from the factory today with worse rod/stroke ratios. The inline 6-250 has a 1.50 rod/stroke ratio for one.

And as far as DETERMINING HOW MUCH CYLINDER WALL PRESSURE IS APPLIED, read here: http://www.physicsforums.com/showthread.php?t=127842

The results? The 331 generates 96% of the sidewall pressure that a 347 does.

The formula is here as well.... http://www.hcs.harvard.edu/~jus/0303/kuo.pdf

350hp!!

Reply #54 – November 06, 2007, 07:59:34 AM

Knock on wood but I have had my 347 for 8 years and never had any problems and every time I drive it I beat the out of it.But if you are going to add a lot of nos or boost then go with the 331 it will last longer, the 347 is better for more base power.My buddy has 18lbs of boost on his 331 and no problems yet.So it just depends how good you can build your motor.

350hp!!

Reply #55 – November 06, 2007, 08:05:57 AM

Quote

it just depends how good you can build your motor

And THIS is always the most important part!

350hp!!

Reply #56 – November 06, 2007, 09:05:57 AM

Yep, now you're getting to the jist of it.

I've seen poor 306 rebuilds that burn 1 qt. of oil per 200 miles.

The thing about the 347 really isn't the rod ratio at all, it's the short piston!

You've got your regular height piston - I'm using these with my blower (Probe):

Then you've got your little elfen 347 piston:

A piston with such a short compression height and short skirt needs to be installed tight in the bore or it can rock and lead to oil burning and premature wear. This means that you need to buy the pistons, measure them, then have your machinist bore the cylinders so they fit on the tight side of the bore clearance tolerance.

Note, using the rod ratio argument and Chevy 400 argument misses the whole issue of the extremely short piston with the pin so close to the top that rocking is almost inevitable to a certain degree. No matter how you look at it, the 347 with it's short piston will wear more in 100000 miles than a 306.

Quote

I have a question, should I just go with a stock HO and run a supercharger on it? I'm looking at like a vortech s trim - 9lbs of boost - and maybe a 75 or a 100 shot of giggle gas?

You can bolt on a Vortech to a good rebuild using forged pistons and make 350, 400, 500 RWHP as you upgrade parts over time. I chose the Kenne Bell which is giving me 415 RWHP & 450 RWTQ from just off idle. The KB is the best thing that could happen to a heavy Fox Coug/Bird as it makes the car feel like a V8 Vega! You just have to have a tire budget :burnout: (I fixed your English BTW)

350hp!!

Reply #57 – November 06, 2007, 09:11:20 AM

I agree and was just going to say that....

Get a kenne bell, or another twin screw blower. Instant torque and power, where as the centrifigaul blower needs the motor to rev to spool up the boost and power, in a linear curve.

350hp!!

Reply #58 – November 06, 2007, 09:25:11 AM

Quote from: 1WLD BRD;186396

I agree and was just going to say that....

Get a kenne bell, or another twin screw blower. Instant torque and power, where as the centrifigaul blower needs the motor to rev to spool up the boost and power, in a linear curve.

Problem with the Kenne Bell is the cost and learning curve. The Vortech is less expensive but does have the issue with making little boost down low which can be an issue with our heavy cars. The boost curve is a shallow exponential actually, but saying it's linear is close enough :D

350hp!!

Reply #59 – November 06, 2007, 09:29:30 AM

Quote from: Cougar5.0;186395

A piston with such a short compression height and short skirt needs to be installed tight in the bore or it can rock and lead to oil burning and premature wear.

How much shorter is the 347 piston skirt than the 302?

How far off center (if any) if the 347 pin from the vertical center of the piston?

Are pins normally in the "center" of a piston?