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02-14-2005, 01:41 AM
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#1 |
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It's a lot like a race car
Join Date: Aug 2000
Location: Meridian, MS
Posts: 4,130
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Re: 306 or 347?
I just noticed your wanting to make 450-475 N/A hp with this motor. That's gonna be hard to do, about the only way to do it would be to throw in a big cam, some AFR 205's or simmilar head and spin it to the moon.
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1987 Buick T-type 1998 HD Electra Elide |
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02-14-2005, 07:55 PM
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#2 |
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Registered Member
Join Date: Jan 2005
Posts: 33
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Re: 306 or 347?
Well i am planning on going with the satge 3 cam which specs are .574/.595 with a 298/310 duration. I know a guy who will be running in the low 11's with AFR 185's, Vic Jr. and a cam that specs out around .580 ( don't know exactly but its close to that) His engine is just a 306 and i figure he must be pushing about 425 hp. So i think it is realistic to run 450-475 with a stroker motor. I mean you never know.. but the assumption seems about right.
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02-14-2005, 08:02 PM
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#3 |
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Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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Re: 306 or 347?
It only takes about 340 RWHP to run 11's
If you want 475HP I would go with a 351 for sure and stroke it to a 393. My brother in laws 393 made over 400HP and torque to the wheels with box stock edelbrock victor junior heads, custom cam and a trick flow intake.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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02-14-2005, 08:12 PM
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#4 |
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Registered Member
Join Date: Jan 2005
Posts: 33
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Re: 306 or 347?
Sorry for the confusion.. i meant 425 at the flywheel.. well i can't afford to do the swap .. so the 393 is out of the question.. but i do know they make huge torque and horsepower.. friend of mine has one and ran 10.80 last year.. but i know it will go faster.. Thanks for your opinion
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02-16-2005, 07:52 AM
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#5 |
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Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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Re: 306 or 347?
I don't think 475 flywheel HP is unreachable at all. That 333 we built is putting out over 500 at the flywheel (calculated on weight & ET) Noone around here has a dyno. It has a GOOD set of Canfields, vic Jr. intake, 750 Holley, and a custom cam from Cam Motion. Hooker Super Comp headers, X pipe etc etc. It'll run 11.60's N/A all damn day. That and it sounds really pissed off!
Speaking of Cam Motion, my new cam showed up yesterday! Woo Hoo! What's the little wheels on the lifters for?  hehehehehehe
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... 
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02-16-2005, 08:45 AM
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#6 |
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Registered Member
Join Date: Jan 2005
Posts: 33
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Re: 306 or 347?
Hey Jester, i will be running a similiar combo.. but different heads (AFR 185,s) What are the specs of your cam... i am just wondering if you could let me know.. still waiting to get email back from cam motion..
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02-16-2005, 10:12 AM
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#7 |
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Registered Member
Join Date: Jan 2001
Location: Moline Il
Posts: 901
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Re: 306 or 347?
I cant take credit for this quote: The best rod ratio is 8 to 1. 8 rods and 1 crank.
Andy
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88 coupe 91 LX NMRA Pure Street 5120 |
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03-17-2005, 07:52 AM
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I'd rather be basketweaving
Join Date: Feb 2000
Location: Indianapolis
Posts: 2,551
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Re: 306 or 347?
Quote:
Don’t listen to anyone that argues the rod-to-stroke crap. That’s only brought up by 331 owners because they want to justify paying money for their stroker motor when they could have had 16 more cubes for the same money. 331 vs 347 with the same H/C/I, compression, piston weight, etc, the 347 will make more power, across the board, EVERY time As far as your hp goals go, its not impossible to make a solid 390-400rwhp setup with the right parts on a 347. I’d suggest a pair of Vic Jr’s, a custom cam from Ed Curtis or Jay Allen, and a Holley Systemax or RPM II intake. That should get you there, and with the right suspension and tires, COULD get you some high 10’s NA, but low 11’s should be easy if you can drive the thing. Good luck, -Drew
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NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft |
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02-16-2005, 09:58 PM
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#9 | |
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Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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Re: 306 or 347?
Quote:
Car #2, 410" Windsor engine, 1-off Canfield's (I know the owner!  ) Cam Motion solid roller cam, .647/.622 lift 252/259 duration, and alllllllll the goodies below that. Still in progress.Car #3, 393" Windsor "budget stroker". Meaning custom crank, stock 351 rods, stock 302 forged pistons. This is the "How fast can ya go on stock parts?" car. Should be lots of fun though!
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....
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02-16-2005, 11:21 PM
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#10 |
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Registered Member
Join Date: Jan 2005
Posts: 33
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Re: 306 or 347?
Thanks Jester.. whenever you get a chance to dig those specs up. I got an email back from cam motion.. and the specs they gave me for a 331 was actually pretty close to the specs of the stage 3 trick flow cam.. I was surprised!! I think they gave me .576/.584 w/ duration at 238/241 and 110 ls. so it almost the same specs.. Oh one more question for you.. what is your compression ratio on the 331(333)?
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