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| Hyper-pak on 225 https://www.slantsix.org/forum/viewtopic.php?t=15944 |
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| Author: | busboy [ Sun Jan 29, 2006 2:35 pm ] |
| Post subject: | Hyper-pak on 225 |
What is involved to run one of these. The set up has the intake/carb and dual exhaust manifolds. The car does occasional weekend cruising, no drag strip. |
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| Author: | james longhurst [ Sun Jan 29, 2006 3:40 pm ] |
| Post subject: | |
on what year/model car? what motor combo? transmission? gears? in other words, what's the whole package? -james |
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| Author: | busboy [ Sun Jan 29, 2006 4:47 pm ] |
| Post subject: | |
72 Swinger, 225, 904, 71/4 suregrip, 2:93 gears, stock cam for now. |
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| Author: | mopar_nocar [ Sun Jan 29, 2006 5:10 pm ] |
| Post subject: | |
you don't want a hyper pack. more like a bbd and a super six intake. sb |
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| Author: | busboy [ Sun Jan 29, 2006 5:39 pm ] |
| Post subject: | |
OK thanks, I'll stick to something a little less radical. Nice eye candy on cruise night though. |
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| Author: | Hyper'72Valiant [ Sun Jan 29, 2006 9:41 pm ] |
| Post subject: | |
Ya, Hyperpacks do look pretty sweet!!!! Cory |
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| Author: | Greg Ondayko [ Mon Jan 30, 2006 7:36 am ] |
| Post subject: | |
I ran The Hyperpak for about a year in my dart with stock cam, valves and a 3.23 rear. The only other mod was I had shaved the head .090". I used a 500 cfm AFB. I did have headers and the 4 four speed. I only drove it in the summer, Things got alot better when i put in the mopar .460 Lift 268* duration cam. In your cold environment it would probably be treacherous. (sp?) I wonder if a heat tube could be devised from maybe #3 or 4 exhaust manifold runner to he base of the H. pak?? Sort of like the '69 Slants' Anti - Icing tube.?? Any thoughts? Dr. Dodge?? Greg |
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| Author: | DusterIdiot [ Mon Jan 30, 2006 8:52 am ] |
| Post subject: | You guys... |
Someone needs to go back over the old 'daily driving' posts I did years ago use the term 'hpak' for the posts... You will find that with a short cam and dutra duals it runs pretty well, you will want some taller gearing than say 2.76's (3.23's are good). The short cam and long runners make for a torque combo, but the cam will 'run out' after 3500 rpm (just when the hpak is wanting to 'come on')...dividing the plenum will help with this and prevents some reversion in the intake. In all facets you'll have to dial the carb in to be rich to make it work in most weather. If you look at the previous posts I ended up making a 'heat box' to go underneath the plenum, it works ok(much better than 'none', but I now find that with all the above work, the rear of the plenum tends to heat faster and the front nearest the fan tends to stay cool (making a tuning nightmare when the rear 3 cyls can be leaned out and the front has to stay slightly richer...LOL). I think with a 'heated air' intake like stock has it would probably like things better when cold, below 40 degrees F it's not very 'happy'... Fuel Injection would change all this.... -D.Idiot |
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| Author: | james longhurst [ Mon Jan 30, 2006 11:42 am ] |
| Post subject: | Re: You guys... |
Quote: the rear of the plenum tends to heat faster and the front nearest the fan tends to stay cool (making a tuning nightmare when the rear 3 cyls can be leaned out and the front has to stay slightly richer...LOL).
D.I.--D.Idiot do you think that an electric fan would help the intake maintain a more even temp across the plenum? maybe less airflow at low speeds? things would certainly warm up quicker. i see in some old pics you're running one of the good 6 or 7 blade stock fans. those really move some air. -james |
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| Author: | DusterIdiot [ Mon Jan 30, 2006 12:58 pm ] |
| Post subject: | Actually... |
The electric fan might help some, when it's switched off... The pics are older and I run a Volare 5 blade slant six clutch fan now ( I ran the 7 blade during the summer since it as plenty hot and the temp gauge said things were kinda getting 'toasty' under the hood. The clutch fan is nice in all weather. The bad part is a couple years back during the winter, I used the car and blocked off part of the radiator with some fiberboard ...warm ups were quicker, heater was nice and hot, but blocking half the radiator didn't help with distribution until it was 'warmed up' then went through a couple of 'hot soaks'... If you're in a warmer climate, you probably will be ok..., heated air intake would make things 'more uniform'. -D.Idiot |
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