Plausible
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Teching In
Joined: Apr 2003
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From: Phoenix, Az
Plausible Does this sound attainable??
Forged Lunati bottom end stock displacement
8.5:1
LQ9 heads, ported with oversized intake and exhaust valves shaft mounted rockers
Sheetmetal intake
Twin turbos running 12-15psi
7500rpm
Is this going to 750 WHp ???
Forged Lunati bottom end stock displacement
8.5:1
LQ9 heads, ported with oversized intake and exhaust valves shaft mounted rockers
Sheetmetal intake
Twin turbos running 12-15psi
7500rpm
Is this going to 750 WHp ???
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Joined: Oct 2002
Posts: 1,648
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From: F.H,Waterford,Port Huron, MI
Re: Plausible what bore? but yes it is! the 8:5:1 is a little low for street IMO but with 15psi ok! I run 10-11psi on stock lower end and LQ9 heads. And my new motor will take me to 700's hp.
Re: Plausible Does Lunati even make a 8.5:1 piston for us? I don't think so, unless they do custom stuff.
I think that combo might hit high 600's rwhp, but not 750rwhp I don't think that's enough boost.
I think that combo might hit high 600's rwhp, but not 750rwhp I don't think that's enough boost.
Thread Starter
Teching In
Joined: Apr 2003
Posts: 30
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From: Phoenix, Az
Re: Plausible </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> Does Lunati even make a 8.5:1 piston for us? I don't think so, unless they do custom stuff.
I think that combo might hit high 600's rwhp, but not 750rwhp I don't think that's enough boost. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Lunati offers four different 8.5:1 kits for the LS1 347, 383, 395, and 408 ci displacements. They use a -21cc reverse dish pistons to lower the compression.
All kits for the LS1/6 are shown here.
All the kits except the 408 are availible in 8.5:1, 10.6:1, and 12.5:1. The 408 gets 8.5 and 10.6 only.
<small>[ April 23, 2003, 02:26 PM: Message edited by: GoldRamAir ]</small>
<strong> Does Lunati even make a 8.5:1 piston for us? I don't think so, unless they do custom stuff.
I think that combo might hit high 600's rwhp, but not 750rwhp I don't think that's enough boost. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Lunati offers four different 8.5:1 kits for the LS1 347, 383, 395, and 408 ci displacements. They use a -21cc reverse dish pistons to lower the compression.
All kits for the LS1/6 are shown here.
All the kits except the 408 are availible in 8.5:1, 10.6:1, and 12.5:1. The 408 gets 8.5 and 10.6 only.
<small>[ April 23, 2003, 02:26 PM: Message edited by: GoldRamAir ]</small>
Thread Starter
Teching In
Joined: Apr 2003
Posts: 30
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From: Phoenix, Az
Re: Plausible </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 2FAST4U:
<strong> what bore? but yes it is! the 8:5:1 is a little low for street IMO but with 15psi ok! I run 10-11psi on stock lower end and LQ9 heads. And my new motor will take me to 700's hp. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I was looking to stay with the stock bore. I know that the LQ9 heads will drop the CR slightly due to the 4cc larger combustion chambers, so a shaving of the heads is mandatory IMO. There will be room to work with with the reverse dish pistons so I do not think the I will have a problem with valve-to-piston clearances. I will probably shoot for 9:1 cr with the head shave.
I think my biggest worry lies with the intake manifold. So far I have found no firm data so to how far the new Weiland intake can be ported to reach my goal of 7500rpm. If 7500 can be reached without hitting a flow wall I believe that 750RWHp should be able to be attained.
<strong> what bore? but yes it is! the 8:5:1 is a little low for street IMO but with 15psi ok! I run 10-11psi on stock lower end and LQ9 heads. And my new motor will take me to 700's hp. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I was looking to stay with the stock bore. I know that the LQ9 heads will drop the CR slightly due to the 4cc larger combustion chambers, so a shaving of the heads is mandatory IMO. There will be room to work with with the reverse dish pistons so I do not think the I will have a problem with valve-to-piston clearances. I will probably shoot for 9:1 cr with the head shave.
I think my biggest worry lies with the intake manifold. So far I have found no firm data so to how far the new Weiland intake can be ported to reach my goal of 7500rpm. If 7500 can be reached without hitting a flow wall I believe that 750RWHp should be able to be attained.
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Thread Starter
Teching In
Joined: Apr 2003
Posts: 30
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From: Phoenix, Az
Re: Plausible </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> Thanks for the Lunati info. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No problem
<strong> Thanks for the Lunati info. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No problem