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Old August 31st, 2013, 04:30 PM   #61
Haggar
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Drove it around a little today, I hate the SM465, that has to go. And the 283 is gutless, or the carb is way out of tune (likely). Kids fit with tons of room to spare in the back, so the fit is perfect.
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Old August 31st, 2013, 05:46 PM   #62
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Looks pretty nice. I'll be watching for a build thread this winter. Should be pretty sweet when it's done.
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Old August 31st, 2013, 06:37 PM   #63
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I like the LS series. Obviously any other first Gen small block will wake that thing up. Go vortec 5.7 and bolt it in.

Or, here is another crazy idea. You mention sand and weight and such. Assuming an all aluminum big block is out of the budget, have you considered a Cadillac 500? They make gobs of power, big trucks like them, usually they get better mpg than a bbc, and they are approximately only 50 lbs heavier than a SBC, lighter if you go with an aluminum intake.
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Old August 31st, 2013, 07:30 PM   #64
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I am pretty sure the LS2 is going in. I really hate carbs. I hate the 2bbl on my CJ7 and I don't like the edelbrock on this one. Its tuned poor, and driving a very limted amount today, you get fumes and such in the vehicle at low speeds/stopped with the top off.

I am thinking that with the top off, this is right now about 3600-3700 lbs (curb weight on the 4x4 is about 3900). So, if I go with the LS2, I shave about 140-ish lbs. And a 700R4/NP208 is lighter than SM465/NP205. So, even with adding 33" tires (on Aluminum rims), it should be about the same weight as stock, I think.

So, this motor came from a trailblazer ss, which weighs 4700lbs. With 4.56 gears and 33s, its the same gearing and transmission as the TBSS on 30" tires and stock 4.10 gears. Cammed TBSS's run deep into the 12s, so I think the performance level will be adequate for a street truck in the Jimmy, with several hundred pounds less, but a bit more wheel weight.
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Old August 31st, 2013, 07:49 PM   #65
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Quote:
Originally Posted by Haggar View Post
Any idea on how buildable they are and still keeping factory fuel injection? It doesn't need to be a 10 second car (thats the other build), but we want something that works as a hot rod/cruiser, so it needs some power. All the fuel injected big blocks I've driven seem to be torque monsters but don't really make the truck that fast. And the 8.1 liters are weird bastard child engines with a real limited aftermarker.
A good port and polish job on the heads would do wonders. With that alone on the dyno you should see nearly 100 horses. Then a good bumpstick and a tune your done. You'd be around 450-500 hp with no problem.
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Old August 31st, 2013, 08:07 PM   #66
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A good port and polish job on the heads would do wonders. With that alone on the dyno you should see nearly 100 horses. Then a good bumpstick and a tune your done. You'd be around 450-500 hp with no problem.
Yeah, there are some good results with the factory heads (LS6 243/799 castings). Its 'SAE' rated at 395hp/400 ft lbs. With headers, cam, etc, they are an easy 475-500hp on stock heads, and about 550hp with worked heads.

I think I will keep the stock heads for now but I want a cam, there's a few that work well for the heavy TBSS trucks.
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Old September 3rd, 2013, 10:09 AM   #67
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Originally Posted by Kodiak450r View Post
problem is the 241s can't take alot of torque
Silliest thing I have ever seen you say. And you've said some dumb things.

If you keep it from hitting rocks/ physically smashing it, a 241 will be more than adequate, especially an HD.
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Old September 3rd, 2013, 07:39 PM   #68
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Jason,

If interested I know someone in the area that has a stroked small block with all accessories that's at 550 HP
He's retired and used to build motors for GM.
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Old September 10th, 2013, 06:39 PM   #69
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LSX. 500HP should be easy and run nice, not lumpy.
this. Sounds like its going to be a nice driver. An LSX will be expensive up front but if you are going to drive it regularly you will love it

after that an SBC wouldnt be bad

if you dont care about gas mileage and you want something that sounds like america ...BBC
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Old December 9th, 2013, 07:37 PM   #70
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LSX. I put a 5.3 in my drag car last year and i am hooked. bone stock this thing will rip the heart out of a mild built sbc. I am very impressed with these motors. I now have 2 more in the garage getting built. you wont be sorry, and if you are thinking about turbo I have read that these motors actually react well with higher compression and boost. The motor you have can make 500hp with the right cam and valve springs. and will hold a 150 shot all day with the right tuning.
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