Author Topic: 289 build or 347.  (Read 6753 times)

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Offline HAMBURGLAR

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Re: 289 build or 347.
« Reply #25 on: June 19, 2017, 04:00:05 PM »
3.8  ratio gears are fine, and strange is the brand .
Did you think i meant it was a strange kind of ratio. I'm not that stupid , its just the way they dress me. :grin:
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Offline HAMBURGLAR

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Re: 289 build or 347.
« Reply #26 on: June 19, 2017, 04:02:50 PM »
Is there anything wrong with keeping the bottom end a 289 and upgrading the top end or is that like giving strawberries to pigs. :shrug:
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Offline boofhead

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Re: 289 build or 347.
« Reply #27 on: June 19, 2017, 06:55:22 PM »
Can be done - compression is generally the issue.

Need to deck the heads a fair amount and then possible the intake machined to suite.
Your choice. Just need to decide and go from their. Plan it out and stick to it.

Offline shaunp

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Re: 289 build or 347.
« Reply #28 on: June 19, 2017, 07:23:51 PM »
Thanks boofhead , i appreciate any help.  I think i live way too far away from shaun. I'm on the south coast of NSW and i think shaun lives on the goldcoast. Cheers mate. :thumb:

Ok mate I could do it if you send it up, and I'll do it, but I do this as a side line now (read NBN pays me more money) I mostly do Ford, Holden and Jaguar engines, doing 2 jags now, I do it cause I like , or call Woody at Fataz competition engines he's just down the road from me. He builds race engine for Group N , Trans-am, TCM cars Sports sedans you name it, good guy ships engines all over Australia for race teams not to mention Ex Historic Bathurst touring cars that still race, builds a killer street engine as well. If  talk to Ian Woodward tell him I sent you.

http://www.fataz.com.au/

Offline Husky65

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Re: 289 build or 347.
« Reply #29 on: June 19, 2017, 07:32:46 PM »
Mate while your doing it you may aswell stroke it out....not gonna cost you much more in the end. And in the future if you want to tweak it a bit you have that ability. I went 302 on mine, and wish I had gone 331/347 while everything was out.

Offline shaunp

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Re: 289 build or 347.
« Reply #30 on: June 19, 2017, 07:36:33 PM »
Mate while your doing it you may aswell stroke it out....not gonna cost you much more in the end. And in the future if you want to tweak it a bit you have that ability. I went 302 on mine, and wish I had gone 331/347 while everything was out.

Its costs 5/8 or F all to stroke them if you consider rebuilding them properly ie resizing rods with new bolts etc, which of course a lot don't do.

Offline shaunp

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Re: 289 build or 347.
« Reply #31 on: June 19, 2017, 07:38:54 PM »
Man am I thankful for this thread. I am not a mechanic and have never built a motor. The only thing I can change on a car is the radio station. I looking at having my 351 Cleveland build to whatever, 408, 429..., and all I hear when the prospective builders talk to me is white noise. They are talking way over my head and I don't know if they are helping me out of or into the deep side.
I'll be in contact Boofhead.  :burnout:

A  408 = 11 sec 1/4 mile @ just below 120 mph and totally street able.

Offline GLENN 70

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Re: 289 build or 347.
« Reply #32 on: June 19, 2017, 07:45:55 PM »
Don't muck around just stroke it . For your needs a 347 for some torque .

Offline David C

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Re: 289 build or 347.
« Reply #33 on: June 19, 2017, 08:10:04 PM »
A  408 = 11 sec 1/4 mile @ just below 120 mph and totally street able.

Now that's about the only tech talk I understand.
I use to race 924's in a previous lifetime, but was to busy to learn the technical side.
Wish I could find a builder in WA that will let me build with him and learn.
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Online Dwayne

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Re: 289 build or 347.
« Reply #34 on: June 19, 2017, 08:21:21 PM »
Quote from: David C link=topic=32333.msg310597#msg310597 date=1497867004
Wish I could find a builder in WA that will let me build with him and learn.
[/quote

Trav?

Offline HAMBURGLAR

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Re: 289 build or 347.
« Reply #35 on: June 19, 2017, 10:21:40 PM »
I am retired. Brisbane based,

I like to provide guidance and I encourage to build it yourself - the hobby is enhanced if you do spanner work yourself. That's my view though does not suit everyone which is fine.

I tend to direct people to SP if you want help with the engine spanner work. The trick is to find a good machine shop. Combine this with common sense and the engine project will go perfectly fine.
Ask as many questions as you like - no question is a dumb question.
Lots here can provide good advice. Just keep the focus on your goals.
Hey boofhead i just took a look at your article at mustangtech and wow very impressive. You had a build there which included GT40P heads. I have a set of pressure tested recoed GT40P non efi heads with shorty headers to match. Am i able to use those on my 289 without too much mucking around or huge loss of compression. Cheers
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Offline boofhead

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Re: 289 build or 347.
« Reply #36 on: June 19, 2017, 10:45:50 PM »
gt40p = 145cc intake port and 59cc chamber (estimated) - it can work ok but
it is hard enough to get a standard base 302 up in compression aka 10.0:1 where a 289 is harder. It is not the be all and end all but it sure helps. Do a few compression calculations and you will see. Try for 9.5:1 in your 289 base see what chamber size you need.

If you have them then sure why not use them - care with camshaft selection required.

edit: quick calcs you will be around 9.0:1 or 9.5:1 if zero decked. Not to bad.

Offline barnett468

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Re: 289 build or 347.
« Reply #37 on: June 20, 2017, 02:49:11 AM »
Is there anything wrong with keeping the bottom end a 289 and upgrading the top end or is that like giving strawberries to pigs. :shrug:

wtf?  :lmao:

Offline barnett468

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Re: 289 build or 347.
« Reply #38 on: June 20, 2017, 02:55:11 AM »
you will not get a big increase in power using a 289 or 302 unless you build it to rev to 6000 rpm at which point it will not have strong low end . the poor low end will be compensated for to some degree with your 5 speed and 3.8 gears but unless you want an engine you need to rev fairly high to get into the meat of the power band you do not want anything smaller than a 331 imo.

also, the gt40 p heads are crap performance wise compared to quality aluminum ones, plus you can safely run more compression with an aluminum head than you can with an iron one and compression is king, plus there is absolutely zero "bling" factor to iron heads but i suppose you could pain them with aluminum paint to add a little pizazz.  :lmao:

do it right and you will only do it once.



 

Offline GLENN 70

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Re: 289 build or 347.
« Reply #39 on: June 20, 2017, 08:15:07 AM »
The 347 stroker option is the best for more torque than the smaller 289/302 and even the 331 engines but not as much Talk you will get out of Barnett   :lmao:

Offline boofhead

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Re: 289 build or 347.
« Reply #40 on: June 20, 2017, 08:47:03 AM »
Just need to decide on a plan of attack and stick with it;  Options
1) 200hp - stock 289 rebuild using headers and small 4 barrel
2) 250hp - 289 gt40p heads small cam and shorties, 4 barrel
3) 300hp - 289 decked 170 e-street heads small roller cam and headers, 4 barrel
4) 400hp - serious 289 rebuild pistons etc 190 11R heads solid roller 225@50 parker funnel web big holley - 7500 rpm

or
5) 400hp - 347 kit, e-street 205 heads, med roller cam, RPM intake 650 holley DP - 6000rpm
6) 450hp - 347 kit, 190/205 11R heads, small/med roller cam, vic jr intake, 750 dp - 6500rpm
7) 500hp - 347 kit, 205 11R heads, med large roller, vic snr, 950 holley dp - 7000rpm

you need to decide and fill in the details


Online Dwayne

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Re: 289 build or 347.
« Reply #41 on: June 20, 2017, 09:02:17 AM »
The E-street heads blurb on summit says they're not suited for roller cams.

Is that just because of the stock springs?  (ie just need to buy bare and add appropriate valves & springs for your cam?)

Offline boofhead

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Re: 289 build or 347.
« Reply #42 on: June 20, 2017, 09:22:54 AM »
Yes the standard springs are not good enough so a spring upgrade is needed for most roller cams when using e-street heads. The best option is to buy bear and put good valves and springs in but that costs so it is a balancing act.

The list is far from complete and like most things there are many ways to skin a cat.
 

Online Dwayne

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Re: 289 build or 347.
« Reply #43 on: June 20, 2017, 09:31:57 AM »
The other option is to just pick up a 5.0 roller motor, deck it and use your GT40P heads with a mild roller cam etc.


Offline barnett468

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Re: 289 build or 347.
« Reply #44 on: June 20, 2017, 09:55:07 AM »
The E-street heads blurb on summit says they're not suited for roller cams.

Is that just because of the stock springs?  (ie just need to buy bare and add appropriate valves & springs for your cam?)

yes . they are the same casting as the rpm heads but with smaller ports.


Offline barnett468

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Re: 289 build or 347.
« Reply #45 on: June 20, 2017, 09:56:58 AM »
The best option is to buy bear and put good valves and springs in but that costs so it is a balancing act.

they claim the valves the use are the same vendor they use for the rpm heads.

Offline barnett468

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Re: 289 build or 347.
« Reply #46 on: June 20, 2017, 09:59:17 AM »
The 347 stroker option is the best for more torque than the smaller 289/302 and even the 331 engines but not as much Talk you will get out of Barnett   :lmao:

Hey, try to at least form a coherent and grammatically correct sentence you broke ass aussie.  :lmao:

Offline barnett468

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Re: 289 build or 347.
« Reply #47 on: June 20, 2017, 10:01:20 AM »
.

I'm gonna make you build a 331, just watch me.  :lmao:

Online Dwayne

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Re: 289 build or 347.
« Reply #48 on: June 20, 2017, 10:05:24 AM »
you broke ass aussie.  :lmao:

He's got $5 that you don't have :bolt:

Offline GLENN 70

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Re: 289 build or 347.
« Reply #49 on: June 20, 2017, 10:05:48 AM »
Hey Barnett if you yanks keep giving me $5 and thats $5 , U.S. Dollars I will be rich soon  :lmao:   :lmao:  on another note a 331 stroker may cost more than a 347  to build ?

 

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