Lq9 best route build? Advice needed
04-17-2015, 08:14 PM
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Lq9 best route build? Advice needed Hello all, Good to be a part of the community.
As the thread says I'm going with an Lq9 iron block for my Fbody Camaro.
Looking to do mid-max effort n/a and a 100-150 shot of nitrous as a cherry on top later on. Searching for some experienced advice/suggestions as to what i can make/build that won't be overkill on the wallet. My initial idea was big cam full bolt on supporting mods. rundown below:
6.0L lq9 iron block
ported ls6 intake/tb-port matched to heads
mild ported 243 heads dual springs -maybe bigger valves? Full Cnc?
1 7/8 headers-cutouts and 3inch straight dual exhaust
244/242 612/610 112LSA camshaft
underdrive pulley
Am i heading in the right direction looking to get 450-460ish on a dynojet though a fbody m6.
All ideas and recomendations welcome, as well as constructive criticism this is the second engine I've modded the first was a h/c/i ls1 i made 429.9 on a dyno jet with the 6.0 being a better platform hoping for an extra 30rwhp. Thanks all in advance.
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As the thread says I'm going with an Lq9 iron block for my Fbody Camaro.
Looking to do mid-max effort n/a and a 100-150 shot of nitrous as a cherry on top later on. Searching for some experienced advice/suggestions as to what i can make/build that won't be overkill on the wallet. My initial idea was big cam full bolt on supporting mods. rundown below:
6.0L lq9 iron block
ported ls6 intake/tb-port matched to heads
mild ported 243 heads dual springs -maybe bigger valves? Full Cnc?
1 7/8 headers-cutouts and 3inch straight dual exhaust
244/242 612/610 112LSA camshaft
underdrive pulley
Am i heading in the right direction looking to get 450-460ish on a dynojet though a fbody m6.
All ideas and recomendations welcome, as well as constructive criticism this is the second engine I've modded the first was a h/c/i ls1 i made 429.9 on a dyno jet with the 6.0 being a better platform hoping for an extra 30rwhp. Thanks all in advance.
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04-18-2015, 10:03 AM
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Well, well, well your in Houston SO I GOT TO HELP YOU.
You stated: I've modded the first was a h/c/i ls1 i made 429.9 on a dyno jet.
Well if you're looking for an extra 30rwhp list what was used on the 1st build and I can work from there as your only stepping the bore from 3.9 to 4.0 so Compression, cam, heads used and if ported how big: valves, runner size also intake used and we can work a extra 30 into your build.... Also are you getting the complete long or short block 6.0 because if your starting with just a bare block as I did build a stroker with the same top end and get 500+rwhp.
Heres how it would look
LQ9 block bored .030 over; stock crank/rods bolts replaced with ARP's
Not 4 typing this morning: Started smokin
https://ls1tech.com/forums/dynamomet...st-2009-a.html
If you need anything or people to get in touch with hit me . We can use his build as a bench mark and either go up or down from there.
You stated: I've modded the first was a h/c/i ls1 i made 429.9 on a dyno jet.
Well if you're looking for an extra 30rwhp list what was used on the 1st build and I can work from there as your only stepping the bore from 3.9 to 4.0 so Compression, cam, heads used and if ported how big: valves, runner size also intake used and we can work a extra 30 into your build.... Also are you getting the complete long or short block 6.0 because if your starting with just a bare block as I did build a stroker with the same top end and get 500+rwhp.
Heres how it would look
LQ9 block bored .030 over; stock crank/rods bolts replaced with ARP's
Not 4 typing this morning: Started smokin
https://ls1tech.com/forums/dynamomet...st-2009-a.html
If you need anything or people to get in touch with hit me . We can use his build as a bench mark and either go up or down from there.
Last edited by lil john; 04-18-2015 at 10:09 AM.
04-18-2015, 10:19 AM
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The ls1 build in my previous z28 had a far greater budget thats why im not using the same top end.sold the car last year now im at it again Just gonna get a bare block a set of 243s and the ls6 on my ls1 and slap it on with a little port work......stroker with stock crank and rods you say? Only bigger piston how much power would u say this is good for .30 over?
04-18-2015, 10:47 AM
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1) LQ9 block bored .030 over: stock crank / rods bolts replaced with ARP's
4.030 X 3.622 stroke and crank
2) Heads 243 heads ported (I got a few guys depending on budget): 225-230cc runner 2.02 - 2.05 intake valves 1.550 - 1.57 exhaust valves. We would like the the heads to flow in the 300 cfm range @ .600 lift after milling or choosing correct piston: Rings and gas ports really help N/a.
3) A GUTTED LS6 intake because The FAST intake is that much Better ported. There's a shop that can do a 102 T/b.
4) Compression around 11:2 to 11:5 and still run around Houston on Shell 93 Octane
5) The cam used was:Specs: 232*-236*-113*-.600"-.600" you could ask for more lift if you got the heads to flow better. BTW your car's lighter than the GTO used.
6) A Nice set of Lunati/ Comp Cam/ or Morel Hyd. roller lifters.
7) Melling oil pump and you really don't need the HV. High pressure over High Volume.
4.030 X 3.622 stroke and crank
2) Heads 243 heads ported (I got a few guys depending on budget): 225-230cc runner 2.02 - 2.05 intake valves 1.550 - 1.57 exhaust valves. We would like the the heads to flow in the 300 cfm range @ .600 lift after milling or choosing correct piston: Rings and gas ports really help N/a.
3) A GUTTED LS6 intake because The FAST intake is that much Better ported. There's a shop that can do a 102 T/b.
4) Compression around 11:2 to 11:5 and still run around Houston on Shell 93 Octane
5) The cam used was:Specs: 232*-236*-113*-.600"-.600" you could ask for more lift if you got the heads to flow better. BTW your car's lighter than the GTO used.
6) A Nice set of Lunati/ Comp Cam/ or Morel Hyd. roller lifters.
7) Melling oil pump and you really don't need the HV. High pressure over High Volume.
Last edited by lil john; 04-18-2015 at 11:18 AM.
04-18-2015, 11:00 AM
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Ok so headwork is going on the bill had the prc stage 2.5s with the 2.02 valves so 2.05 is going to be the goto this round .30 sounds better torque wise so thats happening as well. Block is still waitin to go to the machine shop getting new bearings and arp hardware
Sent you a friend request hope you dont mind a pm or two for advice if needed. Tou totally changed the build route with the .30 over lol thanks for the advice
Sent you a friend request hope you dont mind a pm or two for advice if needed. Tou totally changed the build route with the .30 over lol thanks for the advice
04-18-2015, 11:16 AM
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Didn't finish computer locked up: read it again
Add in the normal factor: Machining/ Head work and balancing and BOOM!!!!! Houston we need a install. Schwanke ECU computer if you need a box.
Add in the normal factor: Machining/ Head work and balancing and BOOM!!!!! Houston we need a install. Schwanke ECU computer if you need a box.
Last edited by lil john; 04-18-2015 at 11:24 AM.
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04-18-2015, 11:42 AM
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That was not a 408 but stock Cubic inches. Ls7 lifters work well when not used with higher lift springs. But that extra $ for Comp/Lunati lifters will save you from worries..But Factory lifters do work with lower lift/rpm builds.
Airflow from the intake is my main Concern.
The Play-offs have begun.
Airflow from the intake is my main Concern.
The Play-offs have begun.
04-18-2015, 11:54 AM
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I see i assumed the .30 over sent it out of stock cube range. So its going to be a 370 stroker. Ive always been confused with the bore and stroke concept this is only my second round lol
04-18-2015, 01:25 PM
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What are you talking about, the stock bore is 4.00 and the stock stroke is 3.622.
You can clean it up the bore up with a hone or bore it over(over bore) .005 to .060 ie after sonic testing. Meaning you need new pistons. 4.005 to 4.060 LS pistons
We are talking simply about a LQ9 block stock build with : Either stock bore OR a Standard overbore.
Crank is 3.622 Standard
Lets keep it simple and not get this all confusing.
Lets go (J. Wall) & the Wizards in the 1st round ? DeRozan is a helluva scorer with Lowry & Lou
You can clean it up the bore up with a hone or bore it over(over bore) .005 to .060 ie after sonic testing. Meaning you need new pistons. 4.005 to 4.060 LS pistons
We are talking simply about a LQ9 block stock build with : Either stock bore OR a Standard overbore.
Crank is 3.622 Standard
Lets keep it simple and not get this all confusing.
Lets go (J. Wall) & the Wizards in the 1st round ? DeRozan is a helluva scorer with Lowry & Lou
Last edited by lil john; 04-18-2015 at 01:42 PM.
04-18-2015, 03:34 PM
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All is relative to how much TQ we can make. A typicle 408 with 243's ported could make around 520 to 530 flywheel but a lot more tq than a smaller stock stroke lq9. But this requires buying New: crank / rods and pistons looking @ around: *8+6+8 = 2200 *Crank+rods+pistons = just a quick figure
But with any build the heads / cam / intake will dictate how much Hp/Tq will be gained
Your engine is like a breathing, living, piece of engineering, Which it is. Well, we think of a engine as a world class sprinter and breathing is the Most Key part because we can build Tq with longer stroke cranks and Hp by adding more RPM. But Air flow will decide on how well we can do both.
Better put. Try telling Usain Bolt: to Sprint, while breathing threw a Straw..
But with any build the heads / cam / intake will dictate how much Hp/Tq will be gained
Your engine is like a breathing, living, piece of engineering, Which it is. Well, we think of a engine as a world class sprinter and breathing is the Most Key part because we can build Tq with longer stroke cranks and Hp by adding more RPM. But Air flow will decide on how well we can do both.
Better put. Try telling Usain Bolt: to Sprint, while breathing threw a Straw..
Last edited by lil john; 04-18-2015 at 03:55 PM.
