What's the biggest ALL Bore LS1?
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Joined: Nov 2001
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From: Austin, TX
Re: What's the biggest ALL Bore LS1? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Dope:
<strong>I remember seeing a 393 using the stock crank.
Dope</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thats correct. 4.155 x 3.622.
<strong>I remember seeing a 393 using the stock crank.
Dope</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thats correct. 4.155 x 3.622.
TECH Addict
Joined: Jan 2002
Posts: 2,950
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From: Magee MS
Re: What's the biggest ALL Bore LS1? The largest I can remeber is a 393 and it was in a magazine....... I can't remember which one but it was putting out close to 500 rwhp and running like 10.9's .... I'll try to find the magazine tomorrow and give somemore info on it
Josh S.
Josh S.
Re: What's the biggest ALL Bore LS1? ARE built a 393ci setup with the stock crank, but they didn't go "all bore". It had a resleeved block with an offset ground stock crank to add a little more stroke.
MTI is finishing an all-bore 393ci with a stock crank for one of their best customers. As Ryan stated, 4.155" bore, stock 3.62" stroke. Same bore that my 434ci setup will have.
Tony
MTI is finishing an all-bore 393ci with a stock crank for one of their best customers. As Ryan stated, 4.155" bore, stock 3.62" stroke. Same bore that my 434ci setup will have.
Tony
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Staging Lane
Joined: Mar 2002
Posts: 82
Likes: 0
From: Amarillo, TX
Re: What's the biggest ALL Bore LS1? I guess the reason to do this is to save money on a new forged crank. How much HP can the stock crank take? You would hate for the crank to be your weak link.
So for the 393 you only need to upgrade your pistons, new bearings and bolts and rings, and machine work. What about the rods? Can we reuse our r0ods and just have them hardened and shotpeened? Or, do we have to get new rods as well?
Would you need stage 3 heads with the 2.08 plus valves or would the stage 2 heads suffice?
How high can you spin these motors - 6700, 7000, etc.?
Can you order just the short block or is there machine work on the heads as well?
How much would one of these cost?
I might be getting a new engine for one of my LS1's and I want to upgrade but not if it is going to cost me too much money.
Thanks,
Eric
So for the 393 you only need to upgrade your pistons, new bearings and bolts and rings, and machine work. What about the rods? Can we reuse our r0ods and just have them hardened and shotpeened? Or, do we have to get new rods as well?
Would you need stage 3 heads with the 2.08 plus valves or would the stage 2 heads suffice?
How high can you spin these motors - 6700, 7000, etc.?
Can you order just the short block or is there machine work on the heads as well?
How much would one of these cost?
I might be getting a new engine for one of my LS1's and I want to upgrade but not if it is going to cost me too much money.
Thanks,
Eric
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Re: What's the biggest ALL Bore LS1? Eric, my last motor used the stock rods. Track results are in my signature.
Yes, you need stage 3 heads, because the combustion chambers need to be opened up to match the new bore size. That is basically the difference between stage 2 and stage 3. Valve size swaps from 2.055 up to 2.080 are easy because the same seats are used.
Figure about $10K installed on an all-bore engine. That is a good estimate for one that uses billet rods.
Tony
Yes, you need stage 3 heads, because the combustion chambers need to be opened up to match the new bore size. That is basically the difference between stage 2 and stage 3. Valve size swaps from 2.055 up to 2.080 are easy because the same seats are used.
Figure about $10K installed on an all-bore engine. That is a good estimate for one that uses billet rods.
Tony
On The Tree
Joined: Mar 2002
Posts: 160
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From: Amarillo, Tx
Re: What's the biggest ALL Bore LS1? Thanks Tony,
The teenager that bought my 98'TA with $5000 in bolt-ons has recently hydrolocked the engine and he wants me to buy back the car from him. I will be doing a trade with him but will be getting the car for a fair deal. I am looking into different options for replacing or rebuilding the engine.
As a point of reference - if my wife found out I spent $10,000 on my car i would be divorced, dead, or both - so that is not an option. I know that's still a good deal but I need to explore more plausible options.
Eric
The teenager that bought my 98'TA with $5000 in bolt-ons has recently hydrolocked the engine and he wants me to buy back the car from him. I will be doing a trade with him but will be getting the car for a fair deal. I am looking into different options for replacing or rebuilding the engine.
As a point of reference - if my wife found out I spent $10,000 on my car i would be divorced, dead, or both - so that is not an option. I know that's still a good deal but I need to explore more plausible options.
Eric
Re: What's the biggest ALL Bore LS1? Perhaps a variation on my motor.
I have a .060 over 6 liter.
I have a 4.075 stroke crank (offset ground Lunati 4.000) but you could offset grind a stock crank and maybe get around 385-390ci out of it.
I have a .060 over 6 liter.
I have a 4.075 stroke crank (offset ground Lunati 4.000) but you could offset grind a stock crank and maybe get around 385-390ci out of it.
Staging Lane
Joined: Mar 2002
Posts: 50
Likes: 0
From: Sydney, Australia
Re: What's the biggest ALL Bore LS1? Hey PSJ & 9 Ball,
I received an e-mail from Jayson at MTI, he says that they now have 3 custom liner sizes for LS1 alloy block, up to 4.250" !!! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I thought before that came that 4.125" was the largest bore with a liner you could get...
$1,200 to install them he quoted. Sounds like a good price, but with all bore engine, cool.
With Lunati 4.25" crank, here comes 482 cubes. Foresee any problems with that combo guys? We are sponsored so not our money were playing with.. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Thoughts?
I received an e-mail from Jayson at MTI, he says that they now have 3 custom liner sizes for LS1 alloy block, up to 4.250" !!! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I thought before that came that 4.125" was the largest bore with a liner you could get...
$1,200 to install them he quoted. Sounds like a good price, but with all bore engine, cool.
With Lunati 4.25" crank, here comes 482 cubes. Foresee any problems with that combo guys? We are sponsored so not our money were playing with.. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Thoughts?
