Some one give me some info on LS engines
08-31-2007, 01:50 PM
#1
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Some one give me some info on LS engines If this is in the wrong section feel free to move it but lets give it a try.
So I have some questions about LS/LQ/etc engines in general and their applications as it relates to performance. In the near future I would like to remove my LS1 and replace it with a forged motor that would be capable of running some healthy psi (10+) a year or 2 after install (twin turbo, large single, F1, etc). Basically where would I start, I've been looking at LS2 shortblocks and a multitude of others. What is the best for this kind of application. Should I go iron or alum, as I understand it the iron blocks are like the truck versions of our lsx motors. Are they stronger? I know they are heavier. Can I run a low compressions motor for a year or 2 and still get decent power? Or is that stupid and should I just run a well built head cam crate motor then swap head and cam when I want to go FI and a shorter crank to run lower compression. I've also heard the number 370 (cid) thrown around a little bit. Where does this motor come from? Is it a bored out LS1? I guess right now I would just like to be a sponge and soak up some info on the subject.
Again, if a mod feels this is in the wrong thread please move it. Thanks for the knowledge sharing.
P.S. anything like an LSX block or LS7 motor I think would be out of my price range so lets stick to the smaller cubes.
P.P.S. I'm going this direction because of reading NASTY TA's built up thread. it gave me some direction.
So I have some questions about LS/LQ/etc engines in general and their applications as it relates to performance. In the near future I would like to remove my LS1 and replace it with a forged motor that would be capable of running some healthy psi (10+) a year or 2 after install (twin turbo, large single, F1, etc). Basically where would I start, I've been looking at LS2 shortblocks and a multitude of others. What is the best for this kind of application. Should I go iron or alum, as I understand it the iron blocks are like the truck versions of our lsx motors. Are they stronger? I know they are heavier. Can I run a low compressions motor for a year or 2 and still get decent power? Or is that stupid and should I just run a well built head cam crate motor then swap head and cam when I want to go FI and a shorter crank to run lower compression. I've also heard the number 370 (cid) thrown around a little bit. Where does this motor come from? Is it a bored out LS1? I guess right now I would just like to be a sponge and soak up some info on the subject.
Again, if a mod feels this is in the wrong thread please move it. Thanks for the knowledge sharing.
P.S. anything like an LSX block or LS7 motor I think would be out of my price range so lets stick to the smaller cubes.
P.P.S. I'm going this direction because of reading NASTY TA's built up thread. it gave me some direction.
08-31-2007, 03:48 PM
#2
Moved from advanced tech section.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
08-31-2007, 03:54 PM
#3
370 is a .030 6.0 iron block lq4/lq9
6.0 is pretty much iron version of ls1 with a 4.00 bore
same crank and stroke, diff. balance, same stock rod length, c.h. pistons,
bearings, etc. some use diff. head bolt lengths however. same bolts just shorter.
6.0 is pretty much iron version of ls1 with a 4.00 bore
same crank and stroke, diff. balance, same stock rod length, c.h. pistons,
bearings, etc. some use diff. head bolt lengths however. same bolts just shorter.
09-01-2007, 09:18 AM
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so for higher boost applications which is better an aluminum block or an iron LQ block. also is there any problem running a motor built for boost without boost for an extended period of time?
09-01-2007, 06:52 PM
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So iron would be optimul for high PSI (15-25)? What are the performance disadvantages of the GM iron blocks to the aluminum blocks?
again thanks for sharing your knowledge
again thanks for sharing your knowledge
09-04-2007, 08:22 AM
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Would their be any problems running an engine on low compression (9:1 or 8:1) for a year or 2 to break in the motor and save up for FI?
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09-04-2007, 10:23 AM
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Originally Posted by kozak
Would their be any problems running an engine on low compression (9:1 or 8:1) for a year or 2 to break in the motor and save up for FI?
.
09-04-2007, 08:22 PM
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you can with low boost, but finally it all depends on your driving habits I know ppl pushing 7~8 of boost for about 2 years but they didn't put more than 15000mi plus they really took care of their rides. if its your daily drive and u will abuse I would build a motor first.