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Old May 29, 2019 | 12:45 PM
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Default Turbo 346

If you were to build a 346 or 347 what ever. With a turbo on it. How much power do you think you could get out of the motor? I'm talking about a motor that could live a couple of seasons or maybe one season.
Or does it make sense to do a 5.3 or 6.0 over building a LS1?
I'm trying to look at this from as many angles as I can.
Cost of building it over doing another OEM block motor since I already have one.
How much power can it make?
How fast can I do blah blah blah blah.
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Old May 29, 2019 | 11:34 PM
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Im a little lost on what your asking. Are you asking if you forge a motor should you start with an ls1 or 5.3 or 6.0.
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Old May 30, 2019 | 01:47 AM
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Hey brother, I’ve got a forged 348 in my car. Made 700whp for a couple years now, trapping 136 in 5k d/a. She hasn’t skipped a beat. Not sure what kinda power you’re talking here but I’ve been very happy so far.
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Old May 30, 2019 | 02:10 AM
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How fast do you want to go and how much money do you want to spend?

Start there.
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Old May 30, 2019 | 08:08 AM
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Originally Posted by jordoza
Im a little lost on what your asking. Are you asking if you forge a motor should you start with an ls1 or 5.3 or 6.0.
If your one of these people out here that still have a 4th gen FBody with a LS1 in it. Do you build off that, since you already have the motor? Or do you switch over to a 5.3 or 6.0?

Originally Posted by Cwarta
Hey brother, I’ve got a forged 348 in my car. Made 700whp for a couple years now, trapping 136 in 5k d/a. She hasn’t skipped a beat. Not sure what kinda power you’re talking here but I’ve been very happy so far.
1000 maybe a hair over. It's hard to say.

Originally Posted by krazy4
How fast do you want to go and how much money do you want to spend?


Start there.

Don't have a big budget. I wish I did I'd be looking into a aftermarket block. Goal is 8's with a 3800lbs race weight.
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Old May 30, 2019 | 08:54 AM
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Originally Posted by Heavy H.P.
If your one of these people out here that still have a 4th gen FBody with a LS1 in it. Do you build off that, since you already have the motor? Or do you switch over to a 5.3 or 6.0?



1000 maybe a hair over. It's hard to say.




Don't have a big budget. I wish I did I'd be looking into a aftermarket block. Goal is 8's with a 3800lbs race weight.
I don’t think an LS1 block is the best choice for your goals.
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Old May 30, 2019 | 09:30 AM
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Originally Posted by BCNUL8R
I don’t think an LS1 block is the best choice for your goals.

I would agree with this. My engine is an l33 punched .128 over. We sonic checked my block and compared it to an ls1 block and the sleeves were still much thicker than an ls1 block after the boring.
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Old May 31, 2019 | 02:44 AM
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Originally Posted by Heavy H.P.
If your one of these people out here that still have a 4th gen FBody with a LS1 in it. Do you build off that, since you already have the motor? Or do you switch over to a 5.3 or 6.0?



1000 maybe a hair over. It's hard to say.




Don't have a big budget. I wish I did I'd be looking into a aftermarket block. Goal is 8's with a 3800lbs race weight.
I don't know what your definition of big budget is, but going 8's at 3800lbs is not going to be cheap.
Also, depends on how reliable you want the car to be.
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Old May 31, 2019 | 07:58 AM
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I get what you guys are saying. What I really want is to build a aftermarket block motor. But I just don't think it's in the budget. So to keep cost down I was seeing if it could be done with the little motor that's in the car. If it makes more sense to get a 6.0 block and work off that. Then that's what I'll have to do. Hope i don't come off as being cheap. Less money I spend on the motor the better chances I have of addressing the other important parts of the car.
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Old May 31, 2019 | 02:03 PM
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I've been making almost 700whp with my SBE LS1 for going on four years now.
From all the research I've done that's 100 hp past what guys say to make to get the best balance of longevity and power being 600whp.
Because I am cheap I recently built a Gen IV LM7 5.3 with 4.8 flat tops with a Tick Stage 2 Turbo cam to go for 800whp or more which I'm currently into for about $700.
Plenty of guys making 1000whp with Gen III and IV 5.3's so I'd say start there and keep the tune conservative and it may live a very long time.
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Old May 31, 2019 | 02:56 PM
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Just some thoughts - without a $$ budget clearly identified, you are fooling yourself and anyone trying to help you.

Most would tell you, sell the LS1. It's worth a lot more in 1 piece running. Take the cash and buy a $200 4.8 or 5.3 (gen IV preferred). Depending on budget, you may have just enough for cam and springs, turbo/kit, fuel system, eng mgmt, all the misc and tuning.

What fuel are you planning to run? I'm assuming E85 since you want 1000hp. What about driveline - TC, trans, and rearend? Is it ready for 1000hp? Don't forget - suspension, brakes, tires, safety, etc. Have you read the Sloppy - Don't BS Me build info?

Side note - what will you not be able to do and need to pay to have done?

Gotta start with $$ budget.
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Old Jun 1, 2019 | 10:30 AM
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Originally Posted by The ******
I've been making almost 700whp with my SBE LS1 for going on four years now.
From all the research I've done that's 100 hp past what guys say to make to get the best balance of longevity and power being 600whp.
Because I am cheap I recently built a Gen IV LM7 5.3 with 4.8 flat tops with a Tick Stage 2 Turbo cam to go for 800whp or more which I'm currently into for about $700.
Plenty of guys making 1000whp with Gen III and IV 5.3's so I'd say start there and keep the tune conservative and it may live a very long time.
Yea that's what I keep hearing. That may be the route to go.

Originally Posted by tblentrprz
Just some thoughts - without a $$ budget clearly identified, you are fooling yourself and anyone trying to help you.

Most would tell you, sell the LS1. It's worth a lot more in 1 piece running. Take the cash and buy a $200 4.8 or 5.3 (gen IV preferred). Depending on budget, you may have just enough for cam and springs, turbo/kit, fuel system, eng mgmt, all the misc and tuning.

What fuel are you planning to run? I'm assuming E85 since you want 1000hp. What about driveline - TC, trans, and rearend? Is it ready for 1000hp? Don't forget - suspension, brakes, tires, safety, etc. Have you read the Sloppy - Don't BS Me build info?

Side note - what will you not be able to do and need to pay to have done?

Gotta start with $$ budget.
Kind of hard to set a budget when your a working man and your paying for stuff as you go along. I'm not one of these guys that has a lump some of money sitting here and I get to pick a limit. If I had to guess, maybe 10/12 thousand. But I could easily go over that I know but that is just a guestimate. Most builds I see people run over the budget any way.
Alot of stuff on the car has already been addressed. Needs a fuel system.
Built 4l60e that I need to sell for a Th400
Needs a MWC Fab 9
Other then the rear end it has all the suspension already on the car. Front end is completely done.

I have a Huron T6 V2 for the car already.
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Old Jun 2, 2019 | 07:10 AM
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Originally Posted by Heavy H.P.
Yea that's what I keep hearing. That may be the route to go.



Kind of hard to set a budget when your a working man and your paying for stuff as you go along. I'm not one of these guys that has a lump some of money sitting here and I get to pick a limit. If I had to guess, maybe 10/12 thousand. But I could easily go over that I know but that is just a guestimate. Most builds I see people run over the budget any way.
Alot of stuff on the car has already been addressed. Needs a fuel system.
Built 4l60e that I need to sell for a Th400
Needs a MWC Fab 9
Other then the rear end it has all the suspension already on the car. Front end is completely done.

I have a Huron T6 V2 for the car already.
im right there with you on the budget . if i work overtime i got more money to spend that week . i set a whp goal an a time limit to get it done . mine is 600 whp an 3 yrs .. with the engine being 1 year to get it cammed turbo an in the car running .
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