Let's talk radical small block fords.

[asphaltjunkie]

One of the Mustang mags (either 5.0 or MMFF) had a project 93 Cobra build with a big bore 347. Made 4xx/4xx n/a with off the shelf *somewhat* affordable parts. Might be worth looking in to.

[asphaltjunkie]

Look up "Project Stolen Goods" on Google. They don't go too terribly far into the details of the motor build in the article, but it'll give you an idea.

[91CoupeMike]

Look up "Project Stolen Goods" on Google. They don't go too terribly far into the details of the motor build in the article, but it'll give you an idea.

I remember that build, that was a sweet teal cobra with black fr500s? Grey or black leather interior. Shit was clean. I remember them using a trick flow intake. (Yack)

But I'll look into it, thanks!

[lilvega]

I would have loved to use a Dart block and do a big bore/short stroke 347 but I intended on a budget build from the start.
Cast scat 9000 crank, Cast Hyper Speed Pro pistons, etc.
Still ended up with 430/447 power and had room to go with tuning. Last dyno pull was still in the 9's for AFR and made all that power by 5600RPM. Peak TQ was by 3900. With the proper carb jets I am confident it would make close to 470 tq and around 450 to 455 hp.
Will be really fun on the street. More fun than a lot more power at 8000rpm.



RPM TQ HP
3500 417.6 278.3
3600 421.9 289.2
3700 433.9 305.7
3800 431.5 312.2
3900 447.7 332.5
4000 439.4 334.7
4100 446.8 348.8
4200 444.4 335.4
4300 441.6 361.6
4400 442.4 370.6
4500 438.7 375.9
4600 439.7 384.2
4700 435.5 387.6
4800 435.5 393.2
4900 428.9 396.1
5000 425.2 403.1
5100 417.4 410.2
5200 411.8 409.9
5300 411.6 416.4
5400 410.3 421.9
5500 404.2 423.3
5600 401.3 427.9
5700 396.2 430
5800 384.1 424.2
5900 374.2 420.4
6000 368.1 420.5
6100 363.8 422.5
6200 361.4 426.6
6300 316.6 379.8
6400 281.9 343.5

[91CoupeMike]

Yeah that is pretty flat and broad power band, if you get it to 12.5:1 AFR or so it'll make the numbers you want I believe.

My goal is 6.70 or faster n/a and low 6s high 5s on juice. I plan on running fuel injection of course. I wouldn't mind spinning 6800-7000rpm regularly. Just outside the "range" of hydraulic lifters without spending an ass ton of money on lifters, or would I be okay? I don't mind adjusting valve lash or checking periodocily and I feel like that's a liviable range for a good set of valve springs.

I really wouldn't mind investing in a valve spring tester, just to have in the garage.

I already have a systemax and my T/B flows right around 800cfm (70mm race accufab), all I would need to get me going is the short block, Ed curtis cam, and a better set of heads.

[lilvega]

Yeah that is pretty flat and broad power band, if you get it to 12.5:1 AFR or so it'll make the numbers you want I believe.

My goal is 6.70 or faster n/a and low 6s high 5s on juice. I plan on running fuel injection of course. I wouldn't mind spinning 6800-7000rpm regularly. Just outside the "range" of hydraulic lifters without spending an ass ton of money on lifters, or would I be okay? I don't mind adjusting valve lash or checking periodocily and I feel like that's a liviable range for a good set of valve springs.

I really wouldn't mind investing in a valve spring tester, just to have in the garage.

I already have a systemax and my T/B flows right around 800cfm (70mm race accufab), all I would need to get me going is the short block, Ed curtis cam, and a better set of heads.

You can see that the Hyd lifters were starting to have issues right at 6200 where the hp and tq blipped up a tic and then 100 rpm later tanked. My stock lifters at least are good to 6200.

Solid roller isn't a pain. Set it and if you have good poly locks and a rocker stud girdle they will stay put. To spin 7k+ regularly you will want titanium spring retainers to keep the weight down and steel rocker arms, shaft mounted if you can afford it. Put standard alum rockers in a Nascar engine and see how long they last.
Don't go too big on the heads or you will suffer down low and in the mid range. My heads are 185cc runners. They are probably maxed out in the top end but obviously the mid range is where I wanted power. AFR 205's are probably your best bet.


I will tell you from experience, work you way down to the 5's. You have gone mid/high 7's but there is a huge difference from 7.7 to 6.5, even bigger to 5.8.

When I built my Vega Wagon I started of with my recycled street engine that made about 450 crank HP. Ran consistent 7.40's (converter was too loose) while I was building a 432" small block. Once the new motor was done I had worked out all the suspension kinks, my brakes were working great and I had no doubt I could reach into the low 6's without any issues and it did just that.

Had I gone out on day 1 with nearly 700 ft lbs of tq that wagon would have either gone into the wall by the 60ft mark or not stopped at the end of the track.

[91CoupeMike]

Yeah, the renegade 205s were what I had in mind, with some jesel shaft mount rocker arms and the lifters from flow techs solid roller cam kit.

[lilvega]

You are on the right track. Now you just need 5 grand and you can be there!

[91CoupeMike]

And I agree on working your way up to quicker times.

I have a friend with a 470whp terminator that couldn't get it down the track to save his life, so his dad built him a x275 coupe that runs 4.50s.

I guess when all you do is push a button and pray you paid your tuner a fair wage to depend your life on the next 4.5 seconds.. Lol

[lilvega]

Mike,
Back in 98-99 some friends of mine were running Mid 6's with stock short block 302's and a small shot. They spent most of their money on heads and suspension. Both were 5 speed cars.
One used World SR cast iron heads and about a 150 shot and the other TFS 170's and a 200 shot and 240.000 miles.
I pulled the 240k car off the trailer once and I swear it took 10 seconds to make 40 psi of oil pressure. He beat the crap out of that lime green hatch every weekend and carried the front tires 80ft out every pass.

Ask Lonnie about Jimmy and Lance's cars.

[91CoupeMike]

Mike,
Back in 98-99 some friends of mine were running Mid 6's with stock short block 302's and a small shot. They spent most of their money on heads and suspension. Both were 5 speed cars.
One used World SR cast iron heads and about a 150 shot and the other TFS 170's and a 200 shot and 240.000 miles.
I pulled the 240k car off the trailer once and I swear it took 10 seconds to make 40 psi of oil pressure. He beat the crap out of that lime green hatch every weekend and carried the front tires 80ft out every pass.

Ask Lonnie about Jimmy and Lance's cars.

Ive met lance!

I've heard all the stories lol! Crazy shit

[lilvega]

It's a shame we all had to grow up.

Take advantage while you can and money flows more freely.
Build something to last and keep it so you don't have to look back and think "I wish I still had that red fox".

[orphan Shelby]

It's a shame we all had to grow up.

Take advantage while you can and money flows more freely.
Build something to last and keep it so you don't have to look back and think "I wish I still had that red fox".

Solid advice from this guy. Get it done while you can man.

[lilvega]

Just buy this and be done..
You could probably get it for under $6k if you have them keep the intake and carb.

http://dfwmustangs.net/class/showproduct.php?product=13279&title=-2a-2aboss-347-2c-afr-205s-2c-dart-8-2-2f9-5-blocks-2c-reichard-billet-intake-2c-vortech2a-2a&cat=9

This motor is nearly a carbon copy of our previous setup that went 5.43 @ 128 1/8 and 8.58 @ 150 in 1/4 in the black JYD Coupe. Only difference is that was a big bore 363 and this is big bore 347. The camshaft is the same one we used from that motor. This motor is new freshly built from the machine shop just picked it up 12/31/14. It is complete from carb to pan. Have receipts and buildsheet from C.T.M. for complete build.


5.) Boss Block Nitrous 347 Longblock 13:1 $6500
-3.250 Eagle 4340 Crank
-5.400 Eagle 4340 rods
-ARP 2000 Rod Bolts
-Diamond 4.125 dome pistons
-Diamond Piston Moly Ring Set
-Custom Billet cam specs to buyer
-Comp solid roller lifters
-Billet Timing Chain
-Canton Oil Pan
-Cometic heads gaskets
-ATI Internal balancer
-Victor Jr powdercoated intake manifold
-Pro-systems 4150 780cfm carb.
-Reichard Billet Timing Pointer
-ARP Head Studs


AFR 205's
-#1450
-58cc
-7/16 studs
-custom solid roller springs
-Titanium retainers
-Comp Ultra-pro magnum 1.6
-Comp cams stud girdle

[Txstang1]

my 383 made about 550 flywheel with my old canfield heads. I have new renegade 195's for it now. I'm hoping to be around 600 flywheel. pump gas, spins to 6k