To stroke or not?
Thread Starter
Staging Lane
Joined: Oct 2019
Posts: 80
Likes: 14
From: Huntington Beach
To stroke or not? Hey guys recently picked up an LQ9. It spun number 2 rod bearing and obviously it needs a new crank and rod.
original plan was to swap the 6.0 in place of the 5.3 in my 2001 Silverado. It’s a z71 4x4 with a 4l60e and 3.73s on 34s. I’m aware the 60e would live a short life behind either engine so I’ll address that separately.
the bores on the lq9 are actually flawless the cross hatching is still visible and this is actually one of the cleanest engines I’ve ever torn down and inspected. So I’m thinking I’ll lightly hone the cylinders since I already have a single ball.
Since it’s a truck should I go for the extra cubes? I will be towing a boat every once in awhile. It’s a daily driver but I take it on road trips, camping, tow and adventure out into the desert and woods, and snow.
original plan was to swap the 6.0 in place of the 5.3 in my 2001 Silverado. It’s a z71 4x4 with a 4l60e and 3.73s on 34s. I’m aware the 60e would live a short life behind either engine so I’ll address that separately.
the bores on the lq9 are actually flawless the cross hatching is still visible and this is actually one of the cleanest engines I’ve ever torn down and inspected. So I’m thinking I’ll lightly hone the cylinders since I already have a single ball.
Since it’s a truck should I go for the extra cubes? I will be towing a boat every once in awhile. It’s a daily driver but I take it on road trips, camping, tow and adventure out into the desert and woods, and snow.
Crank could possibly be machined for re-use but going with a stroke crank with the rods and pistons to boot is gonna make more power and torque. PERIOD
Decisions...Decisions!
Decisions...Decisions!
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Joined: Oct 2020
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Eagle Don't Cost ......nothing how does U want the Stroke?
Center Counter Weight is for a Person with the Need of 8k +
Stroke Before anything Top End.... Cam, heads, etc.....
6.0/6.2 reference...= 402 to 418 easy....
Kills anything below it with Cubic inches without the Help from the Punk / Pump of Forced Induction....
Center Counter Weight is for a Person with the Need of 8k +
Stroke Before anything Top End.... Cam, heads, etc.....
6.0/6.2 reference...= 402 to 418 easy....
Kills anything below it with Cubic inches without the Help from the Punk / Pump of Forced Induction....
For what you want to do with your truck....I would not stroke the engine unless you want overkill and have money to blow. I would keep stock size, BUT I would go with custom cam, truck l92 rectangle port intake, LS3 heads, long tubes, good exhaust, and tune. That should be a little over 400rwhp compared to the 230-240hp you were at. A custom cam will put Powe where you need it to tow and to start moving. Not at 6000 rpm's.
Last edited by 383z; Jul 6, 2021 at 12:47 PM.
Nothing more than an air pump.
How big of one you build or how much air it can move depends entirely on you. You can do to one without doing to the other but your just defeating the purpose.
How big of one you build or how much air it can move depends entirely on you. You can do to one without doing to the other but your just defeating the purpose.
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If you have the budget, definitely more cubes. Rebuilding my blown up LS2 would have cost the same except for the added cost of the crank for another $800, so I had a Callies Compstar crank put in.
Banned
Joined: Oct 2020
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Rpm that Doesn't Make $ is a Waste of time....
Rpm does Equal to a faster ET but if,
no $
Reliability is Momma.
Everybody Loves Momma...
Like guys Need to Watch Yellow Stone... & Kevin Costner
Simple on Simple and good Drinking & Watching to make you Think... I need my New Season!
My Fault. Watching Yellowstone.
Keep it Simple with Common Sense..
Rpm does Equal to a faster ET but if,
no $
Reliability is Momma.
Everybody Loves Momma...
Like guys Need to Watch Yellow Stone... & Kevin Costner
Simple on Simple and good Drinking & Watching to make you Think... I need my New Season!
My Fault. Watching Yellowstone.
Keep it Simple with Common Sense..
Thread Starter
Staging Lane
Joined: Oct 2019
Posts: 80
Likes: 14
From: Huntington Beach
I should’ve mention that the crank is totally wrecked, ground down a lot.
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
Save your $$. Get a stock crank and build your lower end. Stock LS lower ends are unbelievably strong. If towing is your goal, it already has 10:1 compression, add a good low-to-midrange truck cam. If you can get a 4L80E/transfer case out of a wrecked HD truck you will be way ahead .
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Joined: Oct 2020
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Budget is King 👑
$50 to $100 to $150 dollar Used Factory crank... all depends on Who's Selling....75 sound like me and what I'd pay.
$600 - 750 dollar 4.0 crank ....I paid $700 no Tax
As cast non Forged cost even Less...
Both Use 6.125 rods.... H beams $550 I paid...
Piston are a Wash .....they sell Either at Bottom rate cost ....
Either would Like to be Balanced... $150+
When back In Houston ....$150+ goes to 👆 Covering ....duh Balancing....
$50 to $100 to $150 dollar Used Factory crank... all depends on Who's Selling....75 sound like me and what I'd pay.
$600 - 750 dollar 4.0 crank ....I paid $700 no Tax
As cast non Forged cost even Less...
Both Use 6.125 rods.... H beams $550 I paid...
Piston are a Wash .....they sell Either at Bottom rate cost ....
Either would Like to be Balanced... $150+
When back In Houston ....$150+ goes to 👆 Covering ....duh Balancing....
Last edited by Corona; Jul 5, 2021 at 10:35 PM.
Banned
Joined: Oct 2020
Posts: 1,984
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If ones about that life .....saving a few Coins to make the budget isn't about 💩....
But if you've got a tight Budget .... common sense...
Hell just buy a Used 6.0...the one I sold is Still being used...
Elijah got that from me for $400 the Entire engine. I took his Rod Bearing Knocking engine And Scrapped everything....Spare Block.
But if you've got a tight Budget .... common sense...
Hell just buy a Used 6.0...the one I sold is Still being used...
Elijah got that from me for $400 the Entire engine. I took his Rod Bearing Knocking engine And Scrapped everything....Spare Block.
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Joined: Jan 2008
Posts: 2,244
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From: Ohio, Georgia, Nevada, Texas
Is $699 a lot to pay for the extra 50+ ft./lbs. under the pedal at every rpm at all times for the life of the engine?
The following 2020 Hot Rod Magazine article was a little strange, but interesting at the same time. It started off as a test of "stage 3" cams on a stock LS3. After a baseline, they plugged in our Pro LS SUM-8710 230/242 113 + 3 .625/.605 cam. Next up they wanted to try SUM-8705 (identical to Chevrolet Performance Stage 3 234/277 .595/.595 lift 107 LSA cam). Look at the exhaust duration and LSA and it's little wonder that the flycutting required to run that would have made the LS3 piston a time-bomb. So instead, we did what anyone with an unlimited parts budget would do and threw a Pro LS forged stroker rotating assembly at the problem. Easy peasy. Problem solved. We jest, but it's all in the name of science. This back to back test gave us some very good data on what one could expect to happen with common 4" stroker cranks and the power curve.
Here's the Hot Rod article
The following 2020 Hot Rod Magazine article was a little strange, but interesting at the same time. It started off as a test of "stage 3" cams on a stock LS3. After a baseline, they plugged in our Pro LS SUM-8710 230/242 113 + 3 .625/.605 cam. Next up they wanted to try SUM-8705 (identical to Chevrolet Performance Stage 3 234/277 .595/.595 lift 107 LSA cam). Look at the exhaust duration and LSA and it's little wonder that the flycutting required to run that would have made the LS3 piston a time-bomb. So instead, we did what anyone with an unlimited parts budget would do and threw a Pro LS forged stroker rotating assembly at the problem. Easy peasy. Problem solved. We jest, but it's all in the name of science. This back to back test gave us some very good data on what one could expect to happen with common 4" stroker cranks and the power curve.
Here's the Hot Rod article
Last edited by Summitracing; Jul 7, 2021 at 03:37 PM.
Thread Starter
Staging Lane
Joined: Oct 2019
Posts: 80
Likes: 14
From: Huntington Beach
Is $699 a lot to pay for the extra 50+ ft./lbs. under the pedal at every rpm at all times for the life of the engine?
The following 2020 Hot Rod Magazine article was a little strange, but interesting at the same time. It started off as a test of "stage 3" cams on a stock LS3. After a baseline, they plugged in our Pro LS SUM-8710 230/242 113 + 3 .625/.605 cam. Next up they wanted to try SUM-8705 (identical to Chevrolet Performance Stage 3 234/277 .595/.595 lift 107 LSA cam). Look at the exhaust duration and LSA and it's little wonder that the flycutting required to run that would have made the LS3 piston a time-bomb. So instead, we did what anyone with an unlimited parts budget would do and threw a Pro LS forged stroker rotating assembly at the problem. Easy peasy. Problem solved. We jest, but it's all in the name of science. This back to back test gave us some very good data on what one could expect to happen with common 4" stroker cranks and the power curve.
Here's the Hot Rod article
The following 2020 Hot Rod Magazine article was a little strange, but interesting at the same time. It started off as a test of "stage 3" cams on a stock LS3. After a baseline, they plugged in our Pro LS SUM-8710 230/242 113 + 3 .625/.605 cam. Next up they wanted to try SUM-8705 (identical to Chevrolet Performance Stage 3 234/277 .595/.595 lift 107 LSA cam). Look at the exhaust duration and LSA and it's little wonder that the flycutting required to run that would have made the LS3 piston a time-bomb. So instead, we did what anyone with an unlimited parts budget would do and threw a Pro LS forged stroker rotating assembly at the problem. Easy peasy. Problem solved. We jest, but it's all in the name of science. This back to back test gave us some very good data on what one could expect to happen with common 4" stroker cranks and the power curve.
Here's the Hot Rod article
thinking I’ll run the above crank, and these pistons
https://www.summitracing.com/parts/dms-k1931-4000
that’ll allow me to use my current gen 4 rods
Last edited by JF74chevelle; Jul 7, 2021 at 10:48 PM.
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Joined: Jan 2008
Posts: 2,244
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From: Ohio, Georgia, Nevada, Texas
if I want to use that crank, could I use my current gen 4 rods and get pistons to accommodate the stroker crank and still use the gen 4 rods?
thinking I’ll run the above crank, and these pistons
https://www.summitracing.com/parts/dms-k1931-4000
that’ll allow me to use my current gen 4 rods
thinking I’ll run the above crank, and these pistons
https://www.summitracing.com/parts/dms-k1931-4000
that’ll allow me to use my current gen 4 rods
Thread Starter
Staging Lane
Joined: Oct 2019
Posts: 80
Likes: 14
From: Huntington Beach
Last edited by JF74chevelle; Jul 8, 2021 at 12:26 PM.
Banned
Joined: Oct 2020
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Likes: 682
Summit Racing, do You Guy's offer the or a
Center Counter Weight Crank? If so is it at Fair market place cost? Maybe a good idea if not into production...
😉