Stock LS1 Done, Decisions?
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From: Mars Hill, North Carolina
Stock LS1 Done, Decisions? My stock LS1 took a dump yesterday so I am looking for options for rebuild. I thought about going 6.0 LQ4 swap with LS3 Heads/Cam/Spray, but now I am wanting to go STS Turbo since my friend is a dealer & I would love to go turbo. So now I am thinking about going 5.3 stroked to 383 or just going 347 with AFR Heads and good turbo cam with the STS kit. I know everyone says go 6.0 but I am really not looking to hit supper high horsepower numbers or anything I just want a very fun street car/car show cruiser with occasional 1/4 mile run.
Can someone recommend best AFR Heads to go with on the stroked 5.3 build? I was looking for AFR 205's but it doesn't look like they make those any more?
Thanks
Can someone recommend best AFR Heads to go with on the stroked 5.3 build? I was looking for AFR 205's but it doesn't look like they make those any more?
Thanks
I would figure out what block, piston, and stroke you are going to go with and then pick your heads.
My $.02 I would keep and aluminum block for a street car and I would look in to some 317 or 243 GM heads if you are going forced induction. Use the head saving on the fuel system you'll need.
What happend to your LS1 ?
My $.02 I would keep and aluminum block for a street car and I would look in to some 317 or 243 GM heads if you are going forced induction. Use the head saving on the fuel system you'll need.
What happend to your LS1 ?
5.3L will be cheaper and hold the boost well.
Otherwise, reuse your block, stuff some forged pistons and rods in there and let her rip if you want to turbo.
If you want to keep NA, a 5.3L bored out with a stroker kit would be nice for a 383. But the price difference between a Gen IV 402 or 416 is not much (tho you need the conversion kit which adds to the price).
Otherwise, reuse your block, stuff some forged pistons and rods in there and let her rip if you want to turbo.
If you want to keep NA, a 5.3L bored out with a stroker kit would be nice for a 383. But the price difference between a Gen IV 402 or 416 is not much (tho you need the conversion kit which adds to the price).
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I believe Iron 5.3 will be the way to go. I might just go 347ci on the Iron Block and that will be plenty for me. I don't see to many people on here gaining much by going to 383 over 347, not for the money. A nice Forged 347 Rotating Assembly with really good set of Ported AFR Heads, Custom Turbo Cam, Fast 92, and the STS Kit I should have more setup than I will ever need. Thanks alot guys for input!
I'd keep the stroke at 3.622 for boost. Gives you a thicker piston. The added stroke doesn't help much. We aren't talking about 2L Honda motors with turbo lag. You're still at over 5L of displacement pushing the turbo.
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Will do I have 5.3 stock bore block on the way and a set of 799 Heads I picked up for $200 complete. I think I will go with a bore of 3.898, so pretty much iron block LS1. I think I will use LS1 crank, 5.3 rods with ARP2000 bolts, and set of forged pistons with stock compression ratio. I of course will get it balanced which is a no brainer, only reason I am going to use LS1 crank instead of 5.3 is because LS1 crank is gun drilled so it should be stronger right? Or should I just use 5.3 crank?
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If you are not looking to make more then 6-700whp then why not just reuse the LS1 block and save 110lbs of added weight that going iron will add over the front of the car?
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On The Tree
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From: Mars Hill, North Carolina
Call me crazy I just like Cast Iron Blocks better, I feel more confident in trusting it. The thing I don't like is with an Aluminum Block LS1 its pretty much a build once and your done thing, cant go over .10 bore without resleeving. Also with boost I will take the added weight in favor of better block strength
I'm going to call you crazy ^^^ The aluminum blocks have been pushed to 1000+ hp. I wouldn't even consider a iron block untill that point, unless its a full drag car.
Do you know what happened to your engine ? Damage ? What is your power goal with a turbo ?
Do you know what happened to your engine ? Damage ? What is your power goal with a turbo ?
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Going for 500-550rwhp, nothing is wrong with the bottom-end just lifter failure (Would for sure refreshen bottom-end though). While I had it out I was going to go this route so in the future if I did up the power levels some I would not worry about it. I hear to may #7 ring issues on LS1 bottom-end to leave it as it is on boost. I got 5.3 bottom-end and 799 heads for hardly nothing so why not?
I understand you completely I really do, but that's why you guys are here to ponder these questions and give input.. I know I can easily rebuild my LS1 and use the 799 heads on it, ect, ect but I was looking and upgrading now so that it may help for later.
Maybe I should just save the 5.3 block for later when the LS1 does come apart.. I dont know, I thought I had it all figured out but maybe I am over thinking it all
I understand you completely I really do, but that's why you guys are here to ponder these questions and give input.. I know I can easily rebuild my LS1 and use the 799 heads on it, ect, ect but I was looking and upgrading now so that it may help for later.
Maybe I should just save the 5.3 block for later when the LS1 does come apart.. I dont know, I thought I had it all figured out but maybe I am over thinking it all
Last edited by MMorgan9812; Oct 1, 2014 at 09:49 AM.
500-550 hp can be done on a stock bottom end. As long as the tune is good and you have the fuel system to support it you'll be just fine. You can also add meth injection to the system for some more safety.
Here's some more info for you... Make sure you read the title.
https://ls1tech.com/forums/forced-in...lity-list.html
Here's my advice if your going to pull the engine. Hone the block to 3.903-3.905, Forged rods/piston, polish the stock crank , get a turbo cam spec'ed, new lifters and oil pump, stud the heads with a MLS gasket... Turbo that thing and let her eat 10-12 psi and have your self a 600hp street car, with room to grow.
Here's some more info for you... Make sure you read the title.
https://ls1tech.com/forums/forced-in...lity-list.html
Here's my advice if your going to pull the engine. Hone the block to 3.903-3.905, Forged rods/piston, polish the stock crank , get a turbo cam spec'ed, new lifters and oil pump, stud the heads with a MLS gasket... Turbo that thing and let her eat 10-12 psi and have your self a 600hp street car, with room to grow.
Thread Starter
On The Tree
iTrader: (6)
Joined: Jul 2009
Posts: 188
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From: Mars Hill, North Carolina
500-550 hp can be done on a stock bottom end. As long as the tune is good and you have the fuel system to support it you'll be just fine. You can also add meth injection to the system for some more safety.
Here's some more info for you... Make sure you read the title.
https://ls1tech.com/forums/forced-in...lity-list.html
Here's my advice if your going to pull the engine. Hone the block to 3.903-3.905, Forged rods/piston, polish the stock crank , get a turbo cam spec'ed, new lifters and oil pump, stud the heads with a MLS gasket... Turbo that thing and let her eat 10-12 psi and have your self a 600hp street car, with room to grow.
Here's some more info for you... Make sure you read the title.
https://ls1tech.com/forums/forced-in...lity-list.html
Here's my advice if your going to pull the engine. Hone the block to 3.903-3.905, Forged rods/piston, polish the stock crank , get a turbo cam spec'ed, new lifters and oil pump, stud the heads with a MLS gasket... Turbo that thing and let her eat 10-12 psi and have your self a 600hp street car, with room to grow.