Help!
I have gottent the approval from the wife to do a new motor this winter, whoohooo! Anyways I have looked around and wanted to know who makes the best kits, best priced with best parts.. I know summit sells a 347 kit but I am not looking for hyperuetectic pistons, and I would prefer a forged crank. Thanks guys..
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Chris95SVT
1995 Mustang Cobra
Come get some
http://www.NERacing.net
I agree with twister....the 347 is a great engine for horsepower but it was made for racing. It will start to burn oil very quick and will not last long…..after the research I decided that when my 5.0 goes I will put in a 331...they still have plenty of ponies and it is much more suited to street use.
Ya know, I have talked around, and posted the same question to our local SVT club, and they all said the same thing, that a 347 is not a good motor for daily driving and to go with a 331. They said it like this.
347 - 40K Mile motor
331- 100K mile motor
Now that I did some research the 331 does sound like a better choice. That DSS system seems really nice, but I am not looking for a complete engine built, I just want parts, I have an engine builder already. Thanks for the links guys.
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Chris95SVT
1995 Mustang Cobra
Come get some
http://www.NERacing.net
If anything, cylinder pressure is far more detrimental to cylinder wall loading and wear than any difference in rod angle or ratio that you could ever achieve within the constraints of the stock deck height. If you really want to reduce cylinder wall side loading, then you need to reduce power and torque because a 5 percent increase in power will increase side loading more on a stock engine than a 347 has with the same power. I say go with the 347, but I'm only an armchair engine builder so how about we hear it from a professional...
Most of you know who George Klass of Coast High Performance is.
Quote:
Originally posted by George Klass This rod/stroke ratio stuff is really not that big a deal for high end street racer type engines. How many of you older guys remember the old Ford 292 inch Y-Block engine? Generally considered a piece of crap; not much performance and not a very long lasting beast, either. Rod/stroke ratio? 1.91:1. Here are a few engines with their rod/stroke ratios: 454 Chevy - 1.53:1, 455 Pontiac - 1.58:1, 428 Ford Cobra Jet - 1.63:1, Ford SB 331 Stroker - 1.60:1, Ford SB 347 Stroker - 1.58:1, etc. The most important rod/stroke ratio to be concerned with for most street/strip racers is 8:1. Eight rods to one crank. As far as displacement is concerned, here is something to contemplate. NHRA penalizes displacement in all Comp Eliminator classes (weight to cubic inches). Now, why do you think that is? If bigger inch engines didn't have more HP potential, somebody needs to tell NHRA. There is nothing wrong with a 331 OR a 347. Take your pick. But don't get stuck with all this "theory" (side loads, rod/stroke, rod angles, etc.).
Quote:
Originally posted by George Klass What follows is not an opinion, however. A CHP 347 Street Fighter will last as long or longer than a 331 or a 302. This is because of the exclusive oil control feature (discussed elsewhere on this board). Does anyone really think that a 260 or 289 will last longer than a 302?
Quote:
Originally posted by George Klass I have read all of the interesting and logical (and not so logical) reasons for choosing a 331 over a 347, and everyone of those reasons could apply to choosing a 289 over a 302. Which would you choose?
This r/s stuff is causing such a fuss.
As long as the shop that builds it knows the ins and outs there are only driver errors that make motors last long or short
Personally I would rather have a motor that makes 500hp and 470 tq at 6000rpm than a motor that makes 500hp and 440 tq at 7500rpm
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Tom...TK Race Heads...www.tkrace.com
Porting...Flowbench...14 NHRA Records
1-888-920-0094 ext 306
Well, www.mentaladdictionmotorsports.com can build kick ass motors. You should check them out and contact them.. They carry stroker kits too. I've dealt with them before several times, service was great
Stay away from CHP..enough said do a search on here for em
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John Carrell
Be verwy verwy qwyite
It's import hunting season
1995 GTS..W/ a few basic bolt ons "It's a turd
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CHP has had some bad cranks come out. They where Chinese cast steel cranks with the counter weights cast off center. They had to drill the piss out of them to get them to balance correctly, more drilling then I like to see.
Anyway,
Check out your stuff before installing anything. That goes for who ever you get it from.
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Tony Berger
91 LX 337 Incon Twin Turbo
D&D Viper T-56 6 speed
Maximum Motorsports front to rear
94 Cobra
99 Lightning
and it's JUST-N-LX
Contact Dave at www.jdsperformance.com There I found the best price, on time delivery...I gave him the goal, and he picked the pieces and assembled the kit. I asked for the best combo to reach a goal of 625 HP, and I wanted stout enough hardware to handle an additional 250-300 HP of N2O. We hit the numbers almost dead on. He also spoke with my machine shop when requested on his dime.
Whatever you do, stay away from DSS. I've seen too many people recieve bad parts from them.
The whole rod ratio thing is a big joke, also. Ask any engine builder, any real, professional engine builder what they think about rod ratios, and they'll tell you it doesn't make a damn bit of difference. Even Reher-Morrison did a study on it and said it didn't matter!
I say build yourself a 347, but make it with the 5.315(?) rod length instead of the 5.4 inch rod, because that's where the oil control problems occur. A 5.4 rod causes the piston pin to intersect with the oil ring, which is what everyone complains about when they think about building one of these motors.
I think the 347 is played out, myself. Build yourself a nice 342, and have fun.
347 Stroker kits.. who makes the best kit?? 
