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Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: Dunnuck Racing] #1410010 04/05/13 11:59 PM 04/05/13 11:59 PM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Thanks Kieth, I understand about different boxes needing to redo the timing to get back to the same number, but i wonder why this box would want less total timing???? Iron head 906 w/ 9.5 to 1 compresssion at a 4,000 foot DA and 70 degree air temp usually likes 37 -38 total. Why does the rev-n-nator want less? Arnie 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410011 04/06/13 09:44 AM 04/06/13 09:44 AM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing master
Dunnuck Racing master Joined: Mar 2007 Posts: 3,300 Northern Indiana	Arnie , I don't want to step on Troy's toes and give away any information that Im not supposed to,but it just has to do with the way the process the signal from the pickup coil. I just wanted to make sure you knew. I know the first time Dave Dudeck tested with one he wasn't impressed because he was short on time on the dyno he was at and didn't take time to dial it in. It was later on when he had time to play with it that he got the improvement . If I can help at all let me know. Or you can call Troy since its his baby. Keith www.dunnuckracing.com

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: Dunnuck Racing] #1410012 04/06/13 11:02 AM 04/06/13 11:02 AM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Here is the new Firecore HP coil that looks almost stock... Cheers, Arnie 7656541-IMG-20130405-00015.jpg (221 downloads) 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410013 04/07/13 07:28 PM 04/07/13 07:28 PM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Ignition gets finished off with the old MP electronic distributor. It has a curve with 18 degrees mechanical advance, giving 20 intial and 38 degrees total. A new cap and rotor from Firecore, and of course a new set of Firecore 8mm 250 Factory fit Spark plug wires. Looks mostly stock, but should light the fire... 7658459-IMG-20130405-00016.jpg (187 downloads) Last edited by cudabin; 04/07/13 07:30 PM. 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410014 04/22/13 11:12 PM 04/22/13 11:12 PM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Bought a couple of Quick Fuel jet kits for the outboards on the Six Pack. Bob K suggested I start with #83 - #81 jets (staggered) and go from there... Will start with #65's in center carb. 7678896-Regina-20130422-00018.jpg (155 downloads) 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410015 05/09/13 04:31 PM 05/09/13 04:31 PM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Decided on a 10.5" Centerforce Dual Friction Clutch and throw out bearing, as some of the FAST guys have used them on the skinny bias tires, so they must be able to be slipped a bit... I will be sure to remove the assist spring under the dash to avoid issues shifting at high RPM's ! 10.5" should have a little less rotating mass as well to help with traction on street tires. 7699578-Regina-20130423-00022.jpg (143 downloads) Last edited by cudabin; 05/09/13 04:33 PM. 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410016 05/09/13 06:23 PM 05/09/13 06:23 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Nice build...............good luck. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410017 05/09/13 07:41 PM 05/09/13 07:41 PM
Joined: Jan 2003 Posts: 2,023 Lincoln NE 4 440forPOWER super gas
440forPOWER super gas 4 Joined: Jan 2003 Posts: 2,023 Lincoln NE	Just curious, why did you stay with the factory six pack rods? Did you have to for pure stock? Thanks

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: 440forPOWER] #1410018 05/09/13 08:02 PM 05/09/13 08:02 PM
Joined: Jan 2003 Posts: 75,326 A gulag near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,326 A gulag near you.	Quote: Just curious, why did you stay with the factory six pack rods? Did you have to for pure stock? Thanks All depends , if he gets the car certified then he would probably have to , though I think an H beam is as heavy as a 6pk rod . Edit , just reread the thread , I see he switched to a lighter piston so he must not be getting certified because his piston choice is not legal. It doesn't make any sense to reuse the 6pk rod with it's questionable bolt size to rod weight discrepancy , but the lighter piston helps with that problem.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: JohnRR] #1410019 05/09/13 08:30 PM 05/09/13 08:30 PM
Joined: Feb 2005 Posts: 4,334 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,334 Prospect, PA	Quote: Quote: Just curious, why did you stay with the factory six pack rods? Did you have to for pure stock? Thanks All depends , if he gets the car certified then he would probably have to , though I think an H beam is as heavy as a 6pk rod . Edit , just reread the thread , I see he switched to a lighter piston so he must not be getting certified because his piston choice is not legal. It doesn't make any sense to reuse the 6pk rod with it's questionable bolt size to rod weight discrepancy , but the lighter piston helps with that problem. The rule prohibits lighter pistons?

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: BSB67] #1410020 05/10/13 12:49 AM 05/10/13 12:49 AM
Joined: Jan 2003 Posts: 75,326 A gulag near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,326 A gulag near you.	Quote: Quote: Quote: Just curious, why did you stay with the factory six pack rods? Did you have to for pure stock? Thanks All depends , if he gets the car certified then he would probably have to , though I think an H beam is as heavy as a 6pk rod . Edit , just reread the thread , I see he switched to a lighter piston so he must not be getting certified because his piston choice is not legal. It doesn't make any sense to reuse the 6pk rod with it's questionable bolt size to rod weight discrepancy , but the lighter piston helps with that problem. The rule prohibits lighter pistons? Pretty sure that is the way it is, they were going with NHRA stock rules up until a year or so ago and NHRA stock does not allow the use of lightweight pistons nor having valve reliefs in pistons that were not originally installed like that by the factory ... not that people haven't used them .

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: JohnRR] #1410021 05/10/13 05:42 AM 05/10/13 05:42 AM
Joined: Feb 2005 Posts: 4,334 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,334 Prospect, PA	Quote: Quote: Quote: Quote: Just curious, why did you stay with the factory six pack rods? Did you have to for pure stock? Thanks All depends , if he gets the car certified then he would probably have to , though I think an H beam is as heavy as a 6pk rod . Edit , just reread the thread , I see he switched to a lighter piston so he must not be getting certified because his piston choice is not legal. It doesn't make any sense to reuse the 6pk rod with it's questionable bolt size to rod weight discrepancy , but the lighter piston helps with that problem. The rule prohibits lighter pistons? Pretty sure that is the way it is, they were going with NHRA stock rules up until a year or so ago and NHRA stock does not allow the use of lightweight pistons nor having valve reliefs in pistons that were not originally installed like that by the factory ... not that people haven't used them . Maybe I'm looking at the wrong rules. PSMCDR? They appear silent on piston weight, and frankly allow a lot of freedom on pistons. "Engine: Must be factory correct for the year, model, and horsepower claimed. Dealer-installed engines and dealer-performed engine modifications are not allowed. Casting numbers must be correct for the year and horsepower claimed including intake manifold, heads, and exhaust manifolds. Head modifications are prohibited, including, but not limited to, porting, bowl cutting, gasket matching, oversized valves, etc. Heads can be cut to help achieve the allowed compression over advertised. Blocks do not have to be "numbers matching," but they must be the correct displacement. Overbores up to .070" are allowed. Stock cranks only. NO strokers! Random P&G checks are possible. Lightweight cranks and connecting rods are NOT allowed. If found, you will be banned from the event until corrected! Aluminum rods are NOT allowed. Smaller-than-stock rod journals are NOT allowed. Aftermarket pistons are allowed, but piston rings can be no thinner than 1/16", 1/16", and 3/16" for top, second, and oil rings, respectively. Gas porting of pistons NOT allowed. Metric and pressure-back-type rings (dykes, head land, etc.) are NOT allowed. Torque straps allowed. Compression Ratio Limits: All Engines � 1.5 extra points allowed over advertised. Contact us so we agree on the advertised compression. a.Engines with factory dished pistons will be allowed to run either a smaller dish, a flat-top piston, or a small domed piston to achieve the maximum allowed compression. b.Engines with factory flat-top pistons will be allowed to run a domed piston to achieve the maximum allowed compression. c.Engines with factory domed pistons must run a dome of equal or greater dome volume than stock to achieve the maximum allowed compression ratio. d.Heads can be milled and blocks decked within reasonable limits in combination with a), b), or c) above to help achieve the maximum allowed compression ratio."

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: BSB67] #1410022 05/10/13 09:36 AM 05/10/13 09:36 AM
Joined: Jan 2003 Posts: 75,326 A gulag near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,326 A gulag near you.	That's the new rules that have gone away from NHRA specs , I guess what the OP is doing with a lighter piston is ok . This is one of those gray areas that have lead to the current situation. I was building my 383 to NHRA spec when I saw the pending rules change and called either Dan or Bob about it , that call lead me to change directions on my build.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: JohnRR] #1410023 05/11/13 04:37 PM 05/11/13 04:37 PM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	I have no need to "certify" , as there is no Pure stock racing in Western Canada, and i had already pocket ported the heads many years ago... This one is an "almost pure stock build" with stock bore/stroke, factory manifolds and exhaust system, street tires etc... But hopefully faster than when original. The six pack rods will be just fine as the pistons/pins are very light and we put ARP 2000 bolts in, and the redline will be 6,000 rpm anyways. I won't lose any sleep at all worrying about them. Cheers, Arnie 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410024 05/13/13 04:06 PM 05/13/13 04:06 PM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Just started on the crankshaft to remove casting flash and smooth out. Next step will be to shape counterwieghts to reduce windage, and finally to cut the counterweights down as part of the final balance to match the lighter pistons, which will further reduce windage! 7704511-Regina-20130510-00026.jpg (233 downloads) 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410025 05/27/13 10:36 AM 05/27/13 10:36 AM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Ended up machining approx two hundreths off the counterweights as part of the finish balance after shaping the counterweights as below. 7720732-Regina-20130524-00033.jpg (234 downloads) 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410026 05/27/13 04:36 PM 05/27/13 04:36 PM
Joined: Oct 2007 Posts: 4,219 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,219 New York	Re: " The benefit is actually greater as only the active part of the spring wieght counts and the heaviest part of the beehives is the bottom two coils which don't move." Actually, the bottom coils (the lowest "active" coils) move first. The beehive is progressive, with the rates differing by: 1. spring OD 2. spring pitch The upper coils are stiffer for both reasons, and compress last. Boffin Emeritus

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410027 05/27/13 04:44 PM 05/27/13 04:44 PM
Joined: Oct 2007 Posts: 4,219 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,219 New York	You should radius and feather those eyebrow cuts into the dome. Depending on your minimum volume, some reports of small improvement by connecting the cuts - but not always to full depth. Boffin Emeritus

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: cudabin] #1410028 05/27/13 09:30 PM 05/27/13 09:30 PM
Joined: Jul 2010 Posts: 1,491 Oologah, Oklahoma Big Squeeze pro stock
Big Squeeze pro stock Joined: Jul 2010 Posts: 1,491 Oologah, Oklahoma	Quote: Compression will be set at 9.5 to 1, so that i can run it on non - ethanol 91 octane. No quench and iron heads are stopping me from trying more, plus the Mr Six pack camshaft while being more aggressive on the ramps, does not have enough duration to bleed off the squeeze... Cheers, Arnie It wouldn't surprise me at all if it still detonates....I built a VERY similar motor about 15 years ago and at 9.0 to 1 it would still detonate at 1/3 throttle taking off from a stop sign...IMHO quench isn't an option if you want to run over 8.5 to 1 compression... If you can't handle the truth, you're living a lie.......

Re: Mr. Six Pack Engine Attack! Almost Pure Stock build... [Re: polyspheric] #1410029 05/28/13 12:03 AM 05/28/13 12:03 AM
Joined: Jan 2004 Posts: 903 Saskatchewan, Canada cudabin OP super stock
cudabin OP super stock Joined: Jan 2004 Posts: 903 Saskatchewan, Canada	Quote: You should radius and feather those eyebrow cuts into the dome. Depending on your minimum volume, some reports of small improvement by connecting the cuts - but not always to full depth. i understand the benefit to removeing sharp edges on the piston top, but to what exent does it improve power, and how much should the top edges of the valve reliefs be radiused?? Any pictures to guide?? Thanks for the input! Arnie 67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.

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