LT1 rotating assy into a Vortec 5.7 block opinions - Page 3 - Hot Rod Forum : Hotrodders Bulletin Board
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  #31 (permalink)  
Old 07-31-2012, 03:34 PM
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Nooo keep it efi. Thats the whole point of the Lt1!

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  #32 (permalink)  
Old 10-05-2012, 06:50 PM
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Quote:
Originally Posted by joelster View Post
Those LT1 carb intakes are pretty rare. GM was the only company that made them, since there is no real aftermarket for them. Lots of guys convert sbc intakes to fit. The middle 2 bolt holes on each side are different. Make sure your LT1 is actually an LT1 though. They made a "baby LT1" called an L99 that is actually a 4.3 liter V-8. It was put into some Caprices, i'm not sure on the Roadmasters though.
Yea I know about the L99's, the Caprices where the only ones that got em.. My block say 5.7 and the casting number is 327... and I've already gotten the intake. Picked up a beehive kit for the heads and the thin head gaskets.
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Old 10-06-2012, 08:21 AM
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I'm kind of suprised to see balance pads on the rods in an lt1, I thought they had pm rods.
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  #34 (permalink)  
Old 10-06-2012, 10:56 AM
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Looking good! I don't know if you remember my build from the Impala forum, but we made 420 HP with a quadrajet, ZZ9 cam and HEI. Be sure and convert to screw in studs if you use much of a cam at all. I had a few problems there. Also, the early beehives had a problem...I'm sure they're better now. We also staggered the rockers with 1.5's and 1.6's but I really think it would have been just fine with all 1.6's. Good luck with your build and it's good to see you here. Bill.
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  #35 (permalink)  
Old 10-07-2012, 02:16 PM
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Yea My beehives are the newer blue ones, not the yellow early ones.
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Old 10-14-2012, 04:51 PM
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Change of plans...

Well plans where to install a LT1 rotating assy in a extra vortec block I had laying around, but turns out the crank in the vortec was broken and spun the no.4 main and the rear main..so that idea was scrapped , then I had an extra LT1 I was gonna just slap my zz4 cam in and drop it in with a carb and regular HEI
Then I found this..








Wait...What color was that?

That right GM blue.....For the stock 70's smog motor look.

Gonna run a stock GM 4brl aluminum intake with the EGR blocked and a nice qjet. stock manifolds. I might squeeze out a good 275hp. and 300+ lb ft of torque I hope,... This will have just over 9.5 to 1 CR so its on the edge for regular gas.
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  #37 (permalink)  
Old 10-20-2012, 08:07 AM
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Well heads are done, and got all the pistons in their home.. engine is assembled and I'll be pulling the old 305 out today and hopefully dropping this in film at 11




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  #38 (permalink)  
Old 10-20-2012, 01:46 PM
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Glad you got the L98 type heads and not the swirl ports. Should make a good little driver.
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  #39 (permalink)  
Old 10-20-2012, 08:48 PM
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Yea These are about the lowest I would go for factory heads. Otherwise a set of aftermarket vortecs would have gone on.

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Old 10-20-2012, 09:59 PM
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I wanted to ask, what springs are those?

When I read of guys looking to build a 305, your engine is what they should be building instead IMHO. I believe one of the better things that came from the EFI 350 engines were small chamber heads again. I cannot say how many SBC 350's I've bolted together using the double hump small chamber heads (and other heads that are just as good, but w/o the fuelie markings like the 040, etc.). They all were good engines.

Now that they're available, a 350 built w/the late small chamber heads, a Q-jet, a factory aluminum Q-jet intake along with a recurved HEI, a set of headers and an RV type cam will run really well and will blow the doors off a similarly equipped engine w/smog heads.
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  #41 (permalink)  
Old 10-21-2012, 08:36 AM
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the valve springs? They are a kit off ebay that uses new ls6 beehives and I'm sure some comp retainers, it looked like a comp package they came in, but The name card was gone, here is the link..

Chevy 350 LT1 Vortec Beehive Valve Springs Retainers New Custom Kit | eBay

I didn't figure it was a bad price
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  #42 (permalink)  
Old 11-12-2012, 06:54 PM
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Well got it running, had to wait on a new radiator. otherwise it runs like a stripped *** ape, Does need a better exhaust, , i was checking the temp and had it sitting there idling and it just died , now I have no spark. Some days you just can't win.
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  #43 (permalink)  
Old 11-20-2012, 11:30 AM
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swapped the module and all is right with the world.
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  #44 (permalink)  
Old 01-08-2013, 10:07 PM
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little update, after this I found what GM wanted the timing to be at, during this vid it was set at 0 degrees with vac advance, , after I reset it to 10 degrees advance and no vac advance its a whole different car.
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