I was lookin at summitracing's website and they offer a ford racing stroked 347 short block. It says it comes with forged internals. Are these strong enough to handle a sc application, or would it be worth buying the parts piece by piece?
http://store.summitracing.com/partde...7&autoview=sku
thanks
That shortblock uses the boss 302 block so it would be fine to handle the power of a supercharged application, but it doesn't appear to have dished pistons and the compression would a bit on the high side for a power adder.
-Paul
1995 GT 'vert
Best times on old 302 combo:
12.03 at 112.5mph NA
Best time with 9:1 compression NA dart block 331 setup:
11.50 at 121mph
Dyno'd: 415rwhp/410rwtq
2004 Z16 commemorative edition Z06
100% stock: 11.9 at 118mph
yes that is a great short block, thats pretty much bullet proof..
2015 A6 Mustang GT that so far has gone 9.48@147 but still the fastest prochargerd S550 in the world aside from Tim Essick's!
www.Rodeheavershotrod.com
In addition to what Tim said, the only way I'd look into a Boss 302 block setup would be to buy one as a crate motor from ford. This is because some geniousdesigned these blocks with short cylider bores and properly matching crank, rods, and pistons to one can be a bit of a PITA to source that will fot properly and not have the piston come down and out of the cylinder.
-Paul
1995 GT 'vert
Best times on old 302 combo:
12.03 at 112.5mph NA
Best time with 9:1 compression NA dart block 331 setup:
11.50 at 121mph
Dyno'd: 415rwhp/410rwtq
2004 Z16 commemorative edition Z06
100% stock: 11.9 at 118mph
Correct me if I'm wrong, but I believe in order to achieve the 347 CID in a Boss block, due to the shorter cylinders, as Paul stated, a 3.25" stroke crank and a 4.125" bore is utilized, as apposed to the 3.400" stroke/ 4.030" bore combo more commonly found in production blocks.
Not sure whether the 5.315" or 5.400" rod is used??
Fordstrokers 347 4.030 bore, 3.400 stroke, 5.315 rod, 10.6:1CR
Canfield 195 heads, Ferrea 6000 valves, Comp springs, Ti retainers, roller rockers, hand bowl blended
Camshaft Innovations custom billet core hydraulic roller camshaft
TFS Track Heat, 75mm TB, 90mm MAF, 36lb/hr inj
TREMEC 3550, billet flywheel, RAM clutch, 4.10 gears
is it realistic to get 400-450 hp and tq out of a sc 347? thats what I'm shootin for
You can realisticly get that out of a bone stock 302 longblock with a supercharger.Originally Posted by 94svtcobra
Many have achieved 380-390 rwhp with a well-built and tuned NA 347.
2016 GT Premium
As was just said above, you can do this with a lot less. I'm making 380rwhp/380rwtq with a small mismatched low compression 331. I plan to top 410+rwhp with the changes I have planned over the next few weeks.
GMKILLR is making >500rwhp with a stock 120K mile shortblock and GT40 iron heads in his 94-95 cobra. I wouldn't suggest doing it for long, but it can be done.
-Paul
1995 GT 'vert
Best times on old 302 combo:
12.03 at 112.5mph NA
Best time with 9:1 compression NA dart block 331 setup:
11.50 at 121mph
Dyno'd: 415rwhp/410rwtq
2004 Z16 commemorative edition Z06
100% stock: 11.9 at 118mph
Really? You couldn't do it w/ h/c/i and turbo?
Corvette Z06
Growing up.............Not everyone does it!
If I had a stroker motor w/ h/c/i and a blower and made anything less than 550-600 rwhp I would kill myself for being so stupid!
Seriously though, all I have is a stock longblock w/ a C.I. cam and I made over 500 at the wheels w/ a Vortech. You just have to do your homework or you'll end up with #'s like Vipered and Wick!!!!
Corvette Z06
Growing up.............Not everyone does it!
You just have to do your homework or you'll end up with #'s like Vipered and Wick!!!!
2015 Corvette Z06
- Shark Grey / Kalahari
- bolt-ons, tune, lots of carbon fiber (642/671 rwhp/tq)
most definitely.... If your throwing boost to it, a 347 should EASILY create 400-450rwhp... You should be able to get that kinda power N/A
2015 Corvette Z06
- Shark Grey / Kalahari
- bolt-ons, tune, lots of carbon fiber (642/671 rwhp/tq)
As many guys here said, you can get to your power goals NA, 302+power adder or 347+power adder. It all is in how you want it to turn out and how much you want to spend.
In general:
An NA 347 with 400+ rwhp will be less driveable and have more compromises on the street.
A supercharger 302/347 will be more expensive and easily push a stock block to the limit but can have stock-like driveability w/o boost.
Like I said, all in what you want and what you want to spend.
As far as your original ?, the FRPP crate motors are a decent deal with a warranty but if you have a competent builder, you can have the same quality parts or better and spend less.
So, what are you starting with and how much you want to spend?
Good luck man, J
'91 LX Bimini Blue
427"/88mm on 16psi
'99 Contour SVT
Clean DD
well, I'm just starting to price some stuff but in th 10k range, maybe a little more possibly
Anything wrong with your stock 302? what mods do you have now?
-J
'91 LX Bimini Blue
427"/88mm on 16psi
'99 Contour SVT
Clean DD
air intake, exhaust, dist cap n wires, crank shaft pulley(used to have ud pulleys but it was draining the battery) The only real reason I was thinkin about doin a swap is because it has about 118k miles on it
what is a good compression ratio for a sc setup?
9-9.5:1
I know 118k seems high but its a 5.0 and if the compression numbers are good and its been maintained, doesn't use oil or have low oil pressure you can keep the stock engine.
A nice set of Al heads (ideally with matching cam and porting or replacing the Cobra intake) and a supercharger (I like the Vortech S-trim or Novi 2000) will get you 450-500rwhp.
My friend bought my Dad's '93 Cobra and it has the factory 302 with aftermarket H/C/I and 10# from a Novi and makes a conservative 475rwhp.
That makes the most since to me if the engine is good.
-J
'91 LX Bimini Blue
427"/88mm on 16psi
'99 Contour SVT
Clean DD
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