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Topic Review (Newest First)
08-19-2010 08:56 PM
turbolover That last cam on a 110 will work fine for that range. Peak tq will be aroun 4000-4500 but it'll be pretty flat from idle to redline. A nice pulling combo.
08-19-2010 06:12 PM
QParker this will never see anything above 5000 rpm, due to balance problems, and, even with it balanced it'll sling apart.

I want my power band starting around 1000 rpm, so everything'll be down low.

what do I need to do to the cam to get that?
08-19-2010 07:11 AM
turbolover With those small seat durations 110 LSA would work very well. The biggest reason to run a wide LSA is to minimize overlap so you don't have your intake charge leaving through your exhaust before it is compressed. That cam wil have less overlap with a 110 LSA than many stock cams- meaning it'll idle close to stock but have much more mid-range power.
08-19-2010 12:05 AM
QParker what would be better? 111?110?
08-18-2010 10:43 PM
turbolover That's much better. Lsa is a little wide for that small of duration but its pretty good.
08-18-2010 10:27 PM
QParker so the cam specs would be more like this?

lift@1.7:i).510"E).525"
Adv.duration:i)252*E)260*
Cam Lift:i)294"E)300"
lobe center:113*
Duration@.050:i)214"E)220"

They're similar to some blower cam specs for a ls1 on Engle's catalog...
08-18-2010 01:17 PM
1ownerT Sounds really cool!
This thread needs some pics as you move along.
08-18-2010 07:16 AM
turbolover
Quote:
Originally Posted by QParker
Sound isn't a big deal here, I may have to pull some light loads (snowmachines~ around 2500Lbs total trailer weight)
but nothing much. It'll be 4 Wheel drive, just kuz I live in Alaska, and, like I said before, sound is low on the priorities list. OH, and it'll have a big fat nice 'n toasty heater.

Then get a smaller cam. 210-220 should be more than enough. you can go with a narrower LSA with those small durations too- like 110.
08-17-2010 11:29 PM
QParker Sound isn't a big deal here, I may have to pull some light loads (snowmachines~ around 2500Lbs total trailer weight)
but nothing much. It'll be 4 Wheel drive, just kuz I live in Alaska, and, like I said before, sound is low on the priorities list. OH, and it'll have a big fat nice 'n toasty heater.
08-17-2010 03:51 PM
turbolover The cam is a tad on the big side if you want pulling power, but it'll give you a decent sound and it sounds like that may be important for this project. If sound is a concern I would also tighten the LSA up to a 110-112 and shorten your intake duration by a few degrees. DON'T go any bigger. You don't want a power peak over 6,000 RPM. ideally for a street engine you want it to peak around 5000 RPM so you'll have more power where you'll use it.

If it were my build I would be running a cam with about 215/225 on a 112LSA.

With your cam 8.5:1 compression will help off idle response, but any higher than that and you'll really be sacrificing some power.
08-17-2010 03:39 PM
QParker You can see my cam specs on the first post, should I change it in any way, or is it fine? I was thinking a little more exhaust duration, like 235 or so, but what do I know? What compression should I run with that cam?
08-17-2010 03:39 PM
turbolover
Quote:
Originally Posted by QParker
It'll have the water/methanol injection, won't that cool it down enough, or will I need something else?

That'll greatly help, but you can always do better. That is a great first step though.
08-17-2010 03:33 PM
QParker It'll have the water/methanol injection, won't that cool it down enough, or will I need something else?
08-17-2010 03:01 PM
turbolover
Quote:
Originally Posted by QParker
I guess, Do you think I should run 8:1 or 8.5:1 compression? I don't want to go above 15#'s it'll probally stay under 10...
8:1, could go even lower depending on the cam. 10psi with a 6-71 is not the same as 10psi with other forms of forced induction, there is a LOT of heat gain and no intercooling.


Intercooling would be the next thing to consider, especially in this case. Getting your temps down and your density up can really make a difference.
08-17-2010 02:52 PM
QParker that's exactly what I was thinking cobalt, I just lost words...

While I've got attention who makes good reliable bearings and gaskets for the sixes, mine in particular?
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