Old school horse power
#2564847
10/16/18 02:46 PM
10/16/18 02:46 PM
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69cornetr/t
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69cornetr/t
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Can you guys bring me up to speed on the latest horse power gains? I built a 440 in the early 90s for my street challenger that ran 12.50s. The bottom end is stock with 10to1 pistons .030 0ver. Right now I'm thinking aluminum heads already ported with an intake match. And may roller rockers and cam. Any input ,expierence is welcome. how are people running pump gas with all the horsepower? Like I said I've been out of touch for awhile and wanna keep up. Rhanks
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Re: Old school horse power
[Re: ]
#2564863
10/16/18 03:00 PM
10/16/18 03:00 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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I would probably throw some of the bigger trickflows on there, hopefully you have the ability to get tight quench like .040 or less, probably going to do the same as a 100 HP shot o nitrous by adding a bunch of power and losing a bunch of weight where the nitrous actually adds weight and you got to bother with filling it all the time like I would, lots easier to just go get more gasoline.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Old school horse power
[Re: Porter67]
#2564878
10/16/18 03:24 PM
10/16/18 03:24 PM
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69cornetr/t
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69cornetr/t
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12.5 is good but with some of these newer car making big horse power I wanna keep up lol. Kinda cluless with nitrous what do gotta do to the motor anything?
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Re: Old school horse power
[Re: ]
#2564911
10/16/18 04:12 PM
10/16/18 04:12 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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Posts: 14,506
So. Burlington, Vt.
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First things to do......
-decide on how much power you want to make
-determine what your budget is
-hopefully, your budget will cover the cost of the upgrades you’d need to achieve the target power level.
Once you have a budget and a target....... then it’s time to decide which is the best way to get “there”.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Old school horse power
[Re: fast68plymouth]
#2564944
10/16/18 05:02 PM
10/16/18 05:02 PM
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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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... have a budget and a target... Or, spend a sh!tload more $ than neccessary only to eventually end up around the same performance level with a lot less money left. Yes, this is definitely the voice of experience chiming in here.
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Re: Old school horse power
[Re: BradH]
#2565004
10/16/18 06:56 PM
10/16/18 06:56 PM
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69cornetr/t
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69cornetr/t
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Sounds like the expierence I've been looking for! I was thinking trick flow heads and if I can find 2 1/8 headers that actually fit a b body is what I'm thinking now if I can't shave off a half a second in the quarter mile by doing that is it isn't worth it. As far as rollers are concerned like one poster stated I ran rollers in the 80s with my GTX and it run 10 .50s back then I was an all-star lol but did have needle bearings fail. Thanks for all the input there's no better information than lessons learned from mistakes and achievements by people that actually had trial and error results instead of someone reading from from a summit book word for word what I'm looking at LOL
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Re: Old school horse power
[Re: AndyF]
#2565596
10/17/18 09:30 PM
10/17/18 09:30 PM
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69cornetr/t
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69cornetr/t
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Bigger tubes means better heads
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Re: Old school horse power
[Re: ]
#2565635
10/17/18 10:17 PM
10/17/18 10:17 PM
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Joined: Jan 2003
Posts: 31,049 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,049
Oregon
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Bigger tubes means better heads You don't need 2 1/8 headers for a street performance 440. My race 514 makes 900 hp with 2 inch headers so why would you think you need 2 1/8 inch headers on a 500 hp street car?
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Re: Old school horse power
[Re: ]
#2565667
10/17/18 10:49 PM
10/17/18 10:49 PM
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69cornetr/t
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69cornetr/t
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Well that's pretty impressive horsepower flowing through 2 inch headers how did you manage to get it to flow so good? I would think if you could get more going out you could move more through the heads?
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Re: Old school horse power
[Re: AndyF]
#2565680
10/17/18 11:00 PM
10/17/18 11:00 PM
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69cornetr/t
Unregistered
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69cornetr/t
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Like I said in my original post, I'm looking for a little education because I've been away from racing for so long. Way back when that was the mindset.
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Re: Old school horse power
[Re: BradH]
#2565688
10/17/18 11:16 PM
10/17/18 11:16 PM
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69cornetr/t
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69cornetr/t
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Well I would like to get closer to 600hp can i get there with a stock bottom end 10 to 1 bored. 030 over ? If so How? I'm thinking that's too much for the old six pack rods.what can i squeeze out of that? Your thoughts are appreciated!
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Re: Old school horse power
[Re: AndyF]
#2565703
10/17/18 11:46 PM
10/17/18 11:46 PM
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69cornetr/t
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69cornetr/t
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What kinda of quarter mile ET are you getting with that setup?
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Re: Old school horse power
[Re: ]
#2565720
10/18/18 12:15 AM
10/18/18 12:15 AM
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Joined: Oct 2007
Posts: 4,209 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,209
New York
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Smaller primaries tend to run cleaner at idle and have somewhat better off-idle response, especially with big overlap. As Blair explains in painful detail, when the exhaust valve cracks open BBDC the pressure may exceed 70 psi, and the initial escape velocity up to 6 times the average (based on volume and cross-section). Unless the alignment, shape etc. are bad, the pressure diff is what makes flow, not so much the size of the hole.
Boffin Emeritus
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Re: Old school horse power
[Re: ]
#2565729
10/18/18 12:39 AM
10/18/18 12:39 AM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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seems to me the biggest thing is the resonance, with too big a pipe it loses the signal till well past the operating range. Flow doesn't seem to make a big difference as I have seen a few tests where on a 300 hp small block makes no difference if you run the tiniest 273 manifolds VS ported and extrude honed 340 manifolds that will flow way more but without the tuning of the sound waves bouncing back and forth you get almost no difference, even shorty headers make very little extra power but step up to a quality long tube and power is way better but when you step up to too big of a race type header you again lose TQ until way past the RPM range.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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