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| Best cam from ERSON for my supercharged slant? https://www.slantsix.org/forum/viewtopic.php?t=30589 |
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| Author: | Huffin6 [ Sat Aug 16, 2008 10:47 pm ] |
| Post subject: | Best cam from ERSON for my supercharged slant? |
Of couse I am all excited to get a lopey az cam in my six, I want her to rev, but not blow the poor girl up. So I was wondering what you guys would figure an appropriated camshaft would be for my set up. This is going to be my weekend cruiser that I can take to the strip if I ever desire...............of course I will hah ha So far this is what my build will consist of *1964 225 (rebuilt) *3spd manny tranny *homemade headers *my own aluminum intake for the m90 blower *roughly will be 10psi of boost (starting point) *multile mikuni style carburetors, 4 of them (flowing 150cfm each) * true dual exhaust (2n1/4 diameter) no crossover pipe *have thought about having the rods milled by my cousin and the crank lightened.........maybe |
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| Author: | Dart270 [ Mon Aug 18, 2008 6:40 am ] |
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What will static compression be? Lots of headwork? This is a complex question. Lou |
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| Author: | Doc [ Mon Aug 18, 2008 10:18 am ] |
| Post subject: | |
More info is needed... What pistons are you using? DD |
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| Author: | runvs_826 [ Mon Aug 18, 2008 3:51 pm ] |
| Post subject: | |
Do some reading on that m90. I'm going to run 12lbs of boost only because I'll run water injection or an intercooler in the intake manifold. Most of the pontiac guys suggest no more than 8lbs of boost on without some aids. The compression should be somewhere between 8.5-9:1 according to a lot of the books I've read. Most people thing that a low compression is neccessary which is true, however, too low and you will lose a lot of lower end torque. A supercharger (the m90) will create blow through regardless of your cam. This is something you would like to avoid, but it is enivtable particularily at low end. If you look on the bright side though it means you will always have fresh fuel in your chambers. So whatever you decide, the main key is lots of lift with minimal duration. Next, will be the overlap should also be minimal. |
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| Author: | Huffin6 [ Mon Aug 18, 2008 7:56 pm ] |
| Post subject: | cam options |
Stock Pistons and stock valves, will port and polish head and uses reccomended valve train that the cam requires |
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| Author: | runvs_826 [ Mon Aug 18, 2008 8:25 pm ] |
| Post subject: | |
DEFINTLEY do not go above 8psi on the bone stock pistons. Unless you have some expertise I'm not aware of with tuning a boosted engine. It will be minimal power difference for the reliabilty issue. Valves to me are a small issue even on a NA engine untill you start getting in the 15's and lower. However, even a smaller issue once you get into a boosted motor. One idea I must stress is to balance the rotating assembly so your internals are not eating each other when you are trying to spin 6000rpm. That being said I would get the Erson Cam with the following qualities from the Erson group buy information. Feel free to add or chip in.... 270 duration - .465in lift - 111deg seperation The reason I would pick this cam is from what I was taught is you don't want more than 270 duration on anything ran on the street combine with the idea that you want minimal duration in ratio to lift. Next max lift from the list of possible candidates and biggest lobe seperation to pervent blowthrough. I believe that I had somewhere the turbo cam I wanted was 270 duration with .5 lift and 114deg seperation, I would have to get this cut by OregonCam though. |
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| Author: | turbo66valiant [ Tue Aug 19, 2008 7:18 pm ] |
| Post subject: | |
I run the Erson 270 duration - .465 lift w/ 114 lobe sep. When it was installed at 109* on the 110* centerline it would rev to 6200. I installed it at 101* center and shift at 5500. It feels like its losing power anything above that. I'm happy with the cam the way it is now. Idles like stock cam gives nice low end. Hope this helps in your deciding of a cam. Make sure you degree it in though. Installing it straight up was off to many degrees! Later |
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| Author: | Huffin6 [ Tue Aug 19, 2008 9:31 pm ] |
| Post subject: | where do i find better than stock pistons online? |
where are there aftermarket pistons better than stock quality available online? thanx to the replies guys |
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| Author: | Joshie225 [ Tue Aug 19, 2008 9:48 pm ] |
| Post subject: | |
How much money do you have to spend? Wiesco, Ross, Venolia would all help you part with a chunk of cash. |
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| Author: | vynn3 [ Wed Aug 20, 2008 5:25 am ] |
| Post subject: | Re: where do i find better than stock pistons online? |
Quote: where are there aftermarket pistons better than stock quality available online?
http://www.venolia.com/pistons.html#Chrysler-Mopar
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| Author: | Huffin6 [ Wed Aug 20, 2008 4:53 pm ] |
| Post subject: | Not gonna lie,this is buy parts as I have spare cash budget |
we all have bills, and this lovely darling of a 1974 Dart swinger is my prozak for the real world, ha ha ha, Have no clue on what to spend on pistons, I am looking for a 8.5:1 or 9:1 compression ratio and capable of handling 10psi of boost. I saw stocker replacement pistons on summit for like $12 each, whats a good piston worth for a slant and once again, if someone has built an engine similar, what kind of piston should I use. thanx very much in advance! |
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