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Old 12-04-2012, 12:35 AM   #1 (permalink)
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Default Building a 347

So I've gotten really busy with this whole "doctoring" thing but my winter project is to mostly builds a 347... I say mostly b/c I'm starting with a ready made shot block from Coast High Performance... Anyhow, here's my plan, any ideas?

347 Short Block w/ Twisted Wedge flat top pistons and a stud girdle
185cc Track Heat heads with better valvesprings, 58cc for 10.84:1 compression
Comp Cams XE282HR roller cam
1.6 Roller Rockers
Edelbrock Performer RPM II intake
Edelbrock/BBK 70mm Throttle Body
36lb/hr injectors
Shorty headers
Milodon 7qt pan

I'm shooting for 450hp at the crank and a 63-6500 rpm redline..... Time will tell!!
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Old 12-04-2012, 03:49 AM   #2 (permalink)
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Quote:
Originally Posted by theman1990 View Post
So I've gotten really busy with this whole "doctoring" thing but my winter project is to mostly builds a 347... I say mostly b/c I'm starting with a ready made shot block from Coast High Performance... Anyhow, here's my plan, any ideas?

347 Short Block w/ Twisted Wedge flat top pistons and a stud girdle
185cc Track Heat heads with better valvesprings, 58cc for 10.84:1 compression
Comp Cams XE282HR roller cam
1.6 Roller Rockers
Edelbrock Performer RPM II intake
Edelbrock/BBK 70mm Throttle Body
36lb/hr injectors
Shorty headers
Milodon 7qt pan

I'm shooting for 450hp at the crank and a 63-6500 rpm redline..... Time will tell!!
I think you'll be pretty disappointed with that setup. I'll do you favor and take those parts and CHP shortblock off your hands for free, but you have to pay half the shipping to Mass. PM me so we can work out the details. I'm just trying to look out for a fellow VMFer!

In all seriousness, that looks like a real solid combo with good time proven parts that should put you right around your goal HP with a good tune. What's the rest of your drivetrain and suspension setup look like?
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Old 12-04-2012, 06:10 AM   #3 (permalink)
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That combo will be good for 450Hp. your problem will be traction.
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Old 12-04-2012, 08:15 AM   #4 (permalink)
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Opt out the shortys for long tubes. I'm thinking that combo will like them better on the top end. Maybe good for a few more HP's. Unless you already have the shortys, then probably not worth the expense.
I would also call Comp cams and get their opinion on running 1.7's vs. the stock ratio of 1.6. Fords seem to like the 1.7 better and for the same money, why not?

BTW, glad to see you back!
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Old 12-04-2012, 10:39 AM   #5 (permalink)
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Thanks! Rest of the drivetrain is a new World Class T5, aluminum driveshaft, custom narrowed 8.8" w/ 3.55's under it. Suspension is Total Control Products tubular front and coilovers in the rear...

I have long tubes now but the car sits so low the hit constantly so I figured I'd go w/ shorties for the extra clearance. It's a street car so losing a couple HP is worth it if it nets me a "not having to go 1mph om every bumpy road or speed hump" car!
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Old 12-04-2012, 11:10 AM   #6 (permalink)
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+1

Whatever power you give up for more ground clearance is a fair trade, stick with the shorties.
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Old 12-04-2012, 11:17 AM   #7 (permalink)
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I would use a larger TB and a systemax intake along with long tube headers.
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Old 12-04-2012, 11:32 AM   #8 (permalink)
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+1 on the shorty headers also

Depending, on your suspension, you might also have to watch your oil pan, if you go low.

I had to nix my cobra tee pan, and go with a Moroso (it gained me an inch) and I still tagged the Moroso pan once.

Going to be working on a custom oil pan after I finish my heads, shorter and wider Tee's to gain ground clearance, and keep the capacity up.

I'm thinking with the lighter 347 you should be alright though. Make sure you post up pics of your progress.
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Old 12-04-2012, 12:11 PM   #9 (permalink)
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Then I say stick with the shortys too. Not worth the headaches of speed bumps and pot holes for a few extra numbers you'll probably never use anyway.
Question about your rear set up, when you did the short axle on the long side, what is your total width now compared to a stock rear end?
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Old 12-04-2012, 12:39 PM   #10 (permalink)
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Check out Accufab. They make really nice headers for our cars. You can also go to 3/4 length or midlength. I used to run a 351 swap midlength header that gave plenty of clearance. I dont know why you couldn't run something like that with an 8.2 deck motor.
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Old 12-04-2012, 01:43 PM   #11 (permalink)
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I would run Twist Wedge FAC heads if you can. They have proven to make more power than the AFR's both being OOB fresh.
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Old 12-04-2012, 01:45 PM   #12 (permalink)
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Thanks all... I already bought the Performer RPM II intake as it definitely outperformed all the rest for what i'm looking for. I will look into the accufab and measure the oil pan but I think the clearance there is ok. I'm low, but i'm not slammed on the ground.

As for the rearend, yah I did the two short axle trick and it was 1/4-1/2" narrower than stock which is negligible given production tolerances on these cars. I also was going w/ the custom width FR500's so I was able to make sure I filled the wheelwell while avoiding any rubbing.

Oh and the Twisted Wedge Track Heat 185's supposedly outperform the FAC 190's, too!
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The beatings will continue until morale improves!

One Man, One Arm, One Car...
(and one laptop to Google "How-To everything"...
1965 Fastback which I restomodded/murdered in my garage...

In just one year!

http://i272.photobucket.com/albums/j...90/Oneyear.jpg
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Old 12-08-2012, 01:53 AM   #13 (permalink)
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Quote:
Originally Posted by Z06killinsbf View Post
I would run Twist Wedge FAC heads if you can. They have proven to make more power than the AFR's both being OOB fresh.
It's all in a proper matched combo. You can make just as much power with a good quality head from afr, brodix, edelbrock or tfs. I actually prefer the new afr stuff with the smaller 8mm valves ( smaller valve stem has less effect on flow in the port) and 5 angle valve job. They also have very high quality pac racing beehive springs in a 1.29 dia. All of this plus full cnc porting right out of the box. This all adds up to a much lighter quicker reving valvetrain compaired to the old school valves and heavy 1.46 diameter springs on almost every other brand of head including the tfs.

I think the O.P. made a great decision buying the cnc ported version of tfs heads, they will make better power than a fac head, just make sure you get a good custom cam to make it work as well as it can.

I love all of the magazine tests with different heads and they always use some crappy 30 year old cam design like a b cam to dyno the motors... these new cylinder heads need a cam designed to take advantage of the great port designs and flow characteristics of the particular head you are using .... then you can make some serious power.
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Old 12-08-2012, 01:59 AM   #14 (permalink)
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Quote:
Originally Posted by theman1990 View Post
my winter project

Wait you live in Tampa LOL come on man
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Old 12-08-2012, 02:15 AM   #15 (permalink)
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Agh my bad, I misread what was wrote. The combo should make tons of power.
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