intake manifold for 400 Chevy ?

[F-BIRD'88]

But this is truly a daily driver


I would have been... with the 4.30 gears.... 4400 lbs !!!! Make that 4.56 gears. Does that thing really weight that much?
Thats a Street car.

[F-BIRD'88]

What do you need a truck for now? take the Trunk LID off the Impala. Now you got a Pick up truck.
It will be #4400 minus the trunk lid.... Keep taking stuff off it. (Bumper shocks Door guard beams etc)

[rfoll]

The amazing thing is that they weigh about a half ton less than the 1976- models. 2200 lb front, 2000 lb rear.

[Monza355]

I like the crane 272/284 that your going to use in your truck as well rfoll.

Before the quest for more horsepower began my 400 was a real mild near stock engine. It might have been 300 hp but with pocket ported 1.94/1.5 valve 882 heads it had 8.5:1 compression and a Crane 260/272 cam 427/454 lift it was an absolute stump puller torque monster !! It had a stock touched up GM aluminum intake and a Q-Jet and ran really well for what it was. Which of course was nothing to brag about but still it was a really great engine !

[RevTheory]

A 400 runs like a dog with a cam on a 112 LCA. Put those same lobes on a 105-106 LSA, and the motor will be a lot stronger, with the same streetability.

I couldn't agree more. The only reason I can see a 112 LSA cam in a 400 is for mileage (torque and power be damned) or some serious boost or nitrous. Otherwise, they're pigs compared to a ~106.

[rfoll]

A 400 runs like a dog with a cam on a 112 LCA. Put those same lobes on a 105-106 LSA, and the motor will be a lot stronger, with the same streetability.

I couldn't agree more. The only reason I can see a 112 LSA cam in a 400 is for mileage (torque and power be damned) or some serious boost or nitrous. Otherwise, they're pigs compared to a ~106.

Exactly, gas mileage is the primary pursuit for the truck application. It will produce as much power as I need by accident. I have another cam I am tempted to try, 220/220, 490/490, 114 LSA hyd roller. Does anyone think this would produce better economy? For my application, I don't think the high lift is necessary, but it was a cheap unknown purchase. Again, power output is will be adequate regardless. Monza, like your previous engine, This one is a stock 400. it has a very straight standard bore and the pistons are the ones without the bevel at the outside edge. As a standard bore, I'm not worried about the short rods wearing out the bore. I found another just like it recently with very few miles on it for $200. I might try a different recipe for that one. "Stump puller' is putting it mildly, it was difficult to get it out of an intersection without spinning the tires. I put the 2.73 gears in before I changed back to a smaller, (Vortec), engine. The car would top 100 mph in second gear. It would have been interesting to see what the top speed was.

[Johnwesley]

It would help mileage especially with a twin turbo setup. Eco boost Chevy

[rfoll]

It would help mileage especially with a twin turbo setup. Eco boost Chevy

Spending that kind of money to get better mileage is counterproductive. I'm building these engines for around $500, both the 400 and the
vortec engine.

[GARY C]

A 400 runs like a dog with a cam on a 112 LCA. Put those same lobes on a 105-106 LSA, and the motor will be a lot stronger, with the same streetability.

I couldn't agree more. The only reason I can see a 112 LSA cam in a 400 is for mileage (torque and power be damned) or some serious boost or nitrous. Otherwise, they're pigs compared to a ~106.

Exactly, gas mileage is the primary pursuit for the truck application. It will produce as much power as I need by accident. I have another cam I am tempted to try, 220/220, 490/490, 114 LSA hyd roller. Does anyone think this would produce better economy? For my application, I don't think the high lift is necessary, but it was a cheap unknown purchase. Again, power output is will be adequate regardless. Monza, like your previous engine, This one is a stock 400. it has a very straight standard bore and the pistons are the ones without the bevel at the outside edge. As a standard bore, I'm not worried about the short rods wearing out the bore. I found another just like it recently with very few miles on it for $200. I might try a different recipe for that one. "Stump puller' is putting it mildly, it was difficult to get it out of an intersection without spinning the tires. I put the 2.73 gears in before I changed back to a smaller, (Vortec), engine. The car would top 100 mph in second gear. It would have been interesting to see what the top speed was.

The one issue I would see is the loss of low end tq with a 114LSA so it requires more throttle input to propel the vehicle...Kind of like putting a 6cylinder in a full size truck.

[Monza355]

I choose the 225/231 112 lsa camshaft for my engine because I wanted a mild street engine with broad powerband and it has to run on pump gas with 10.5 compression. Hopefully it won't be a total dog ! However I find it hard to believe that only lsa itself makes or brakes the engine combo.

[rfoll]

My understanding is the narrower LSA helps feed a severely under-valved engine, such as the 400 inch sbc. The 112 lsa will help the brakes, but I had no problems with my 224/230/110 lsa. Again, it is a 2 ton car. With higher compression, you would have better vacuum than I did. The extra overlap will help stave off pinging.

[F-BIRD'88]

What happebs at wot is not the same as what happens at part throttle..

[rfoll]

I remember reading "mostly street", which means part throttle.

[77cruiser]

I suppose my mostly street deal won't work very good with 107 lsa & a single plane.

[rfoll]

But this is truly a daily driver


I would have been... with the 4.30 gears.... 4400 lbs !!!! Make that 4.56 gears. Does that thing really weight that much?
That's a Street car.

This was my drive inro Portland this morning. Do you think this looks like the kind of road where you would want 4.56 gears and a lot of torque. You live in Ontario, where there is real winter weather. Tell me you have something reasonable for winter. Although I live in the banana belt of western Oregon, I learned to drive in central NY. No one drove hot rods in the winter there, they drove real street cars.