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  #16 (permalink)  
Old 08-17-2010, 11:11 AM
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400 ft/lb ain't stockish- for a 292 inline!

The problem I see w/building a 300 HP NA engine then turning it into a blown engine, is the cam and pistons will automatically have to be replaced. If you're gonna do a blown engine, I would do it w/o any NA stops along the way.

The inline 7 main bearing engine is stout, no doubt. But I would line up a couple cores, just the same.

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  #17 (permalink)  
Old 08-17-2010, 12:35 PM
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Originally Posted by cobalt327
400 ft/lb ain't stockish- for a 292 inline!

The problem I see w/building a 300 HP NA engine then turning it into a blown engine, is the cam and pistons will automatically have to be replaced. If you're gonna do a blown engine, I would do it w/o any NA stops along the way.

The inline 7 main bearing engine is stout, no doubt. But I would line up a couple cores, just the same.

Not stockish for that engine but for that vehicle type.
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  #18 (permalink)  
Old 08-17-2010, 12:40 PM
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oh, I've seen the ricers, and that's why I want to beat em! My buddy has an eagle talon, completely stock, other than it going up to 15#'s and that thing really surprised me. I was looking at the turbo and thinking it belonged on my snowmachine while he was burning rubber on all 4 tires (AWD) with a little 4 banger...
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  #19 (permalink)  
Old 08-17-2010, 12:44 PM
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400 foot pounds of torque is stockish for a 1949 chevy pickup that came with a 216 I6 with 95HP from the factory?
I think you got your engines/years mixed up a little there...
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Old 08-17-2010, 12:51 PM
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Quote:
Originally Posted by QParker
400 foot pounds of torque is stockish for a 1949 chevy pickup that came with a 216 I6 with 95HP from the factory?
I think you got your engines/years mixed up a little there...

Its stock for a relatively modern truck- which is what I would use to compare it to since that is what you'll be cruising next to on the roads. Go jump in one of your buddies stock trucks and go for a spin, that is about the power you would be feeling with a 400ftlb 292- I would consider that a stockish power level.
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  #21 (permalink)  
Old 08-17-2010, 01:26 PM
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true, but 500 HP out of a 292 is pushing the edge of streetability, maybe I'll get with Tom Lowe, Larry from T6, or Tom Langdon and see what they think.
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Old 08-17-2010, 01:28 PM
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Originally Posted by QParker
true, but 500 HP out of a 292 is pushing the edge of streetability, maybe I'll get with Tom Lowe, Larry from T6, or Tom Langdon and see what they think.

You're thinking in terms of NA power. If you run it at 10-15psi 500hp is actually VERY docile.
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Old 08-17-2010, 01:40 PM
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500 HP is 500 HP. Off boost, an engine can be docile to the point of being a soggy dog.

Relatively speaking, getting a tractable, streetable 500 HP from an inline 292 is getting a LOT from the design, regardless of what is used to get there, IMO.
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Old 08-17-2010, 01:40 PM
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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...
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Old 08-17-2010, 01:52 PM
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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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Old 08-17-2010, 02:01 PM
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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.
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Old 08-17-2010, 02:33 PM
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It'll have the water/methanol injection, won't that cool it down enough, or will I need something else?
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Old 08-17-2010, 02:39 PM
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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.
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  #29 (permalink)  
Old 08-17-2010, 02:39 PM
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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?
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Old 08-17-2010, 02:51 PM
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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.
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