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-   -   Blown Chevy 292 inline six (http://www.hotrodders.com/forum/blown-chevy-292-inline-six-182837.html)

QParker 08-16-2010 03:30 PM

Blown Chevy 292 inline six
 
What do you guys think about this?

I'm building a 400HP/400Ft.Lbs. 292 inline six with around 10 pounds of boost.
Just wondering what you guys think of my setup and how you think it'll work. It's going into a '49 chevy pickup on a '94 S-10 frame with a NV3500 5 speed.It'll be a street truck with the occasional race with the rice rockets w/ souped up 4bangers.

It'll have: a homemade intake, lump ports, 1.94I/1.60E valves, homemade 1.75" headers, Ross pistons, MSD Boost Master ignition, Holley 850 cfm vac. 2nd's, and a 6-71 blower with a water/methanol injection kit from Snow Performance.
Here's my cam specs:
lift@1.7:i).500"E).510"
Adv.duration:i)272*E)280*
Cam Lift:i)294"E)300"
lobe center:115*
Duration@.050:i)224"E)230"

What do you guys think? Changes? Comments? Concerns? Questions? Something I missed? :confused:

bigdog7373 08-16-2010 04:09 PM

Stock rods? AHHH! Are the main bearings going to hold up? Unless you use steel rods i don't expect this engine to last long.

QParker 08-16-2010 04:20 PM

Thanks! Knew I was missing somethin, it'll have scat H beam rods, anything else?

bigdog7373 08-16-2010 04:24 PM

Crank, piston specs, compression?

QParker 08-16-2010 04:30 PM

Stock crank, Ross pistons, haven't talked to them yet, and 8-1 compression with 10 pounds of boost. What else... here's the rods...
http://www.summitracing.com/parts/SCA-66000206/

bigdog7373 08-16-2010 05:25 PM

Rods look good. These engines are 2 bolt mains right? Is it possible that you could put 4 bolt splayed caps on? Can you find a forged crank anywhere? Seems kind of pointless to upgrade the rods and have a weak crank. I personally don't like having any stock parts in a forced induction engine. JMO

SSedan64 08-16-2010 05:32 PM

Those Cranks aren't weak + 7 Mains.

QParker 08-16-2010 06:06 PM

they're 2 bolt mains, IDK about the splayed caps, but I know the crank is tough, Leo Santucci is putting over 1000 horse on one and so far it hasn't broke, bent, twisted, or deformed in any way... yet, so putting less than half the stress he is putting on his on mine? should be fine.
While I'm in the light, who should I get bearings and gaskets from? I don't want any cheapo stuff in this, it's gonna be built to last. no short cuts, This will pan out to be around a $3500 build...

345 desoto 08-17-2010 05:17 AM

I think it's going to cost $3,500 (THEN some) for the blower set up alone...

QParker 08-17-2010 09:50 AM

That's been covered, I already have the blower, I just have to fab up a manifold to mount it on. It was rebuilt for another project, but we decided to go a different way with it.

turbolover 08-17-2010 10:10 AM

I would trade that blower in and get a more modern one that is a better match for your goals, or even turbocharge it. :D Those 6-71 blowers are terribly inefficient. For a 500hp engine a single 20G turbo with a 10cm housing would work much better and give you minimal lag.

QParker 08-17-2010 10:21 AM

turbos are cool, but you just can't beat having a big ol' blower under the hood. Especially with an inline six!
They may be inefficient, but if I get 400 ft.lbs out of a 292 who cares!

I may make a high compression N/A motor first with around 300HP, then, when that wears out go with forced induction of some kind.

turbolover 08-17-2010 10:36 AM

Quote:

Originally Posted by QParker
turbos are cool, but you just can't beat having a big ol' blower under the hood. Especially with an inline six!
They may be inefficient, but if I get 400 ft.lbs out of a 292 who cares!

I may make a high compression N/A motor first with around 300HP, then, when that wears out go with forced induction of some kind.


A lot of people love the look of those blowers, especially when they're all shined up. I'm more into performance, but each has its following- shine for the shows and performance for racing.

You should fab up a nice 3-2-1 header system with a large side exit, that would complement the look very well.

QParker 08-17-2010 10:55 AM

I've got a 496 bigblock pushing 800 horse for my performance engine, it looks like crap, but it's really funny to idle up to a little ricer and scare them when the rev up the little 4 banger and I rev up something with more than 3 times the displacement and twice the cylinders.

but back on topic, I want to have a nice looking truck that can still haul *****, and 400 foot pounds of torque will do just that!

turbolover 08-17-2010 11:00 AM

Some of those "ricer" engines are nothing to sneeze at. Other than displacement they are usually superior to the SBC in about every way. And when you have them running 25psi they can really surprise you.

I've done a few smaller enignes and they can actually be a lot of fun.

BTW with 292ci and 10psi I would be hoping for more than 400ftlb. That's a fairly stockish tq level. I think 500ftlb should be doable for ya! :thumbup:


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