Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283553
04/06/17 07:54 PM
04/06/17 07:54 PM
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crabman173
Unregistered
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crabman173
Unregistered
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I don't think it is possible with factory intake / carb set up--that is one lofty goal HP wise and the word streetable close to it The intake is the governor and choke point Any 511 style stroker you do will throw up 560-600 HP easy as pie but 750 is a darn long way from 600 This will be interesting
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Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283568
04/06/17 08:18 PM
04/06/17 08:18 PM
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Joined: Apr 2005
Posts: 1,509 TN
SCATPACK 1
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,509
TN
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Sorry guys, l've been a SB guy for 30 years and this rb stuff is foreign to me and I have lots of questions so I need some opinions on this. I just bought a 80's pro street (real) 6bbl cuda that has a mild 906 head, 440 and a 850 with a single plane and want to convert it back to some form of a 6 barrel again with a end goal of around 700-750(streetable) horse and it MUST fit under the factory shaker hood. I'm not really hung up on what head goes on or how big the cam is. stroking it could be on the table but I'm not against a higher revving combination either.My last small block was pretty aggressive and that's OK by me. Pump gas (not e85) is a must here. My initial thoughts were of going with ported victor or Indy heads, a mod man intake and a efi 6bbl setup but all the posts are quite old and not up to date on people's results. I can't find any info if a mod man six barrel setup will fit under a shaker as I can't find any intake heights. Carbs are not totally out of the question with the factory intake but what aftermarket head will flow the best and still accommodate a factory 6bbl intake? I know using a six barrel setup to make bigger numbers isn't ideal but it would be sac religious to not put it back on....but I'm not willing to go slow either. Well congrats on finding a 6BBL CUDA. WOOHOO now the fun begins. If you remember, Paul Rossi ran a 440 6 pack in a 70 Challenger with the old Weiand 6 pack intake and it fit under the stock TA hood. I had one of those on my car for a while but with a 1050 Dominator intake and with the tall spacer required to make the Dominator work, i doubt it would have worked with the shaker I now have on my car. I have not heard anything good about the mod man intake. My Challenger was dyno'd at 650+ with a stock stroke a big roller cam, the above intake with dominator and a LOT of work on the 906 heads to get big flow numbers out of them. Look up six pack in the search engine. I seem to remember a post a while back about some modifications that were being done by Muscle Motors or someone that was getting really high HP numbers from them. Good luck with yoru build. Post some pictures of yoru find.
Old Geezer Racing
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Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283579
04/06/17 09:00 PM
04/06/17 09:00 PM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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The Weiand six pack intake will not work with the stock shaker hood, too tall. Maybe a sheetmetal short runner tunnel ram with a top for using 3 split Dominators, but that might be something that gets costly.
[image][/image]
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Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283611
04/06/17 10:30 PM
04/06/17 10:30 PM
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Joined: Aug 2011
Posts: 2,905 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,905
Pattison Texas
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Thanks for the intake measurement, now I just need to find one for the oem 6 bbl intake. From member Sasquatch, Carb pad height on the factory sixpack is 5.25 to the pad (edelbrock catalog page 58) Ask and ye shall receive. Todd
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283734
04/07/17 01:42 AM
04/07/17 01:42 AM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,539
So. Burlington, Vt.
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IMO, you're going about it wrong....... or rather, you're focusing on the parts, and an arbitrary hp number instead of the application.
Figure out the things that are the highest priority for the finished product(like a 6bbl that fits under the stock hood), what gears, converter, etc you'd like to use in the car....... then build the motor around those things that are a "given"......... and it will just make what it makes.
Unless it's a race car that requires a certain amount of power to be competitive in a particular class, or to reach a performance target....... then it's just a number. For street cars, I find it makes more sense to build the motor so that it works well how it's being used "most" of the time......... and if that means you give up 20, 30, 50hp of peak power...... it's not really a big deal. Basically, for a given engine size, the TQ won't really change that much even if the top end HP is down 25-50HP........besides.........mostly what you feel in the seat of your pants when driving around on the road, is the TQ.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283752
04/07/17 02:25 AM
04/07/17 02:25 AM
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Joined: Dec 2013
Posts: 4,806 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,806
Wichita
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Build a reliable, easy 600 HP engine and add a 150 shot of N2O.
'63 Dodge 330
11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
9.92 @ 135mph with a 350 shot of nitrous and 93 octane pump. 1.43 60 ft. 3,750 lbs.
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Re: Recipe for 700hp six pack 440 or bigger-
[Re: 72demon416]
#2283808
04/07/17 09:59 AM
04/07/17 09:59 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Yeah, I know this is kind of a ass backwards way of approaching this. I've probably(?) been guilty of the same thing on occasion. Is the real constraint that it all needs to fit under the factory 'Cuda Shaker hood? Are you're tied to using an RB block?
Last edited by BradH; 04/07/17 10:00 AM.
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