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RPMSpeed 5 ls engine test for 2018 (but wait there's more)

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Old 03-03-2018, 04:46 AM
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Engine #3 sounds like it's gonna be the most fun - I hope you make use of that short stroke and rev it to 8k+ because that's where it's gonna make its power. I actually hope to take my engine in this direction eventually.
Old 03-03-2018, 12:43 PM
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8k would be possible with more expensive heads, intake, and valvetrain. This budget setup i expect low 7000s.
Old 03-27-2018, 03:36 PM
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How about some pics of the 333/372 pistons?
Obviously the 333 uses the 4.030 and 372 uses the 4.040 but same piston and design.
More pics soon. Builds are picking up momentum.
We will be adding these to the website soon also.

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Old 04-12-2018, 01:52 PM
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Few updates.

Got the bbk tb in. THIS. THING. IS. MASSIVE. and heavy. But expected from a cast piece. Minimal work required but ill have some side by sides later.

How about some 372 action?
As i am STILL having issues posting pics directly on here, i have a fe IG links with mult pictures, so click and scroll! Ill have more posts/pics of progress also. The 333 wont have documented tear down, but will have a fairly good documented build up.
So here is the 372 tear down.
05 6.0. 60k (supposed) miles. The only things ill be reusing are the rods, block, crank and covers. The heads will be cleaned and machined for another setup or maybe ported idk. Everything looked like covfefe and tar were poured on the inside and allowed to soak for a very long time. Bought it with a "slight noise at idle". Expected lifters or maybe rod bearing. Was not let down....CAM BEARING. In fact it came out when i pulled the cam! (pics in link)
Another interesting find....gen4 vvt pistons in the 05 6.0. GM be crazy. The rest was pretty much normal, 1x cam gear, tapered thrust plate.
Both knock sensors were rusted good on the bottom and the top came loose and free wheeled so a hammer, flat blade screw driver, and an impact later, they came out.
Bearings are not reusable. Some had excessive wear at the ends and some had lines gouged into them. I dont reuse bearings anyway, but have pics for science of course. The rings were mostly stuck IN the lands. Looks like this 6.0 smoked 3 packs of Pall Mall daily. The grimey taint from the rings not doing their job made such an odd pattern on the pistons, i thought they had an anodized coating on the first ring land. NOPE! Just oil and carbon. They were set to soak in some cleaner while i pulled the plugs and stripped the block bare. Its now at the machine shop waiting for new cam bearings, 4.040 torque plate bore and hone, true deck, jet wash, and check cam tunnel and main bore. Should be ready soon ;-)
Link to some of the teardown/cleanup pics
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Last edited by tech@WS6store; 04-12-2018 at 02:45 PM.
Old 04-12-2018, 02:33 PM
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Very cool test man. Do you have any plans of leveling the playing field, compression wise?

Maybe run thicker or thinner gaskets here and there?
Old 04-12-2018, 02:43 PM
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I am using a dish on the 360 and trying to get the rest around the same cr roughly. This is all strictly "budget" mostly so adding $140 gaskets etc isnt part of this plan. Ill calculate them all and post in a few i dont know if i have yet
Old 04-12-2018, 03:50 PM
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More pics and updates? You got it!!
A little bit more on the cleanup. Block is done. Cam bearings installed and just installed the oil/freeze plugs and billet barbell. Waiting on crank polish.

Also THIS IS WHY YOU DONT LOOK AT YOUR CAM BEARINGS!!! They'll be bad. Of course, this one came out as a bonus on teardown. Like i said, most of the parts wont be reused, so the super clean cam gear will get filed away maybe or if anyone needs it, its up for grabs ;-). The oil pump was toast, pics of it later. The thrust plate...well if you dont know by now why i dont reuse them or why I recommend torrington bearings on timing sets, this should tell you.
Block will get deep cleaned om bores, deck, lifter bores, and mains soon also to take care of anything left after machining. Always remember a clean hole is a good hole folks.
Enjoy the update (from IG because i am still having issues with posting pics)
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Last edited by tech@WS6store; 04-12-2018 at 03:58 PM.
Old 04-12-2018, 04:16 PM
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Originally Posted by tech@WS6store
I am using a dish on the 360 and trying to get the rest around the same cr roughly. This is all strictly "budget" mostly so adding $140 gaskets etc isnt part of this plan. Ill calculate them all and post in a few i dont know if i have yet
I hear ya, I didn't realize they were that high.
Old 04-12-2018, 04:31 PM
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The CR are going to be a bit off BUT i may mill the 243s on the 360 all stroke to gain some cr back since the ICON pistons ill be using are -14.5cc dish. They may come above deck also, so it could be close ill measure then mill accordingly.

372 4.040 x 3.622 - 11.09:1
360 all stroke 3.800 x 4.000 - 9.35:1
Iron 5.7l 3.908 x 3.622 - 10.56:1
Ls2 333 4.030 x 3.268 - 10.06:1
Iron 5.1l 313 3.908 x 3.268 - 9.8:1

Those are all using .053 hg and 64cc 243 head calculated at 0 deck.
I could go in and change alot, but i want this to be off shelf and as is mostly. The 333 will be different as will the 360 possibly with milling the head some to gain cr.
The 372 360 and 5.7 will all be using the same cam, the Texas Speed Stage 2 Truck high lift. The 333 and 313 will be using our brand new lobes to be released very soon.
I would like to do a dished 372 also later on IF there is time as that is a pretty high CR to be using if in a 2500/3500 truck and crap gas. Results on that later though.
And maybe an iron 376...but again, that will be later on.
Lots to do and little time to do it!!
Old 04-12-2018, 05:48 PM
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Originally Posted by tech@WS6store
The CR are going to be a bit off BUT i may mill the 243s on the 360 all stroke to gain some cr back since the ICON pistons ill be using are -14.5cc dish. They may come above deck also, so it could be close ill measure then mill accordingly.

372 4.040 x 3.622 - 11.09:1
360 all stroke 3.800 x 4.000 - 9.35:1
Iron 5.7l 3.908 x 3.622 - 10.56:1
Ls2 333 4.030 x 3.268 - 10.06:1
Iron 5.1l 313 3.908 x 3.268 - 9.8:1

Those are all using .053 hg and 64cc 243 head calculated at 0 deck.
I could go in and change alot, but i want this to be off shelf and as is mostly. The 333 will be different as will the 360 possibly with milling the head some to gain cr.
The 372 360 and 5.7 will all be using the same cam, the Texas Speed Stage 2 Truck high lift. The 333 and 313 will be using our brand new lobes to be released very soon.
I would like to do a dished 372 also later on IF there is time as that is a pretty high CR to be using if in a 2500/3500 truck and crap gas. Results on that later though.
And maybe an iron 376...but again, that will be later on.
Lots to do and little time to do it!!
Yeah, that all stroke needs a bump!
Old 04-12-2018, 05:55 PM
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I actually expect it to be above deck, but will know when i check the deck height on it during mock up.
Old 04-13-2018, 01:52 PM
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More updates on the 372.
Block is done. Deep cleaning to commence.
Gaskets at the ready. 1218s swapped on our 243/799 heads. Rods are cleaned and will be touched up in a jiffy. Crank is nearing completion also.
Going pretty quickly...or at least the pics make it seem so lol.
Enjoy!!

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Old 04-19-2018, 02:47 PM
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Progress! on the 372....333 upcomming maybe next week along with some more exciting news.

Cleaned and hone a set of gen4 rods. Nothin special, but shiney!
Installed pistons. Napier rings to come. Then on to the crank etc and checking clearances/thrust. :-(

Just a few pics for ya.
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Old 04-25-2018, 10:28 AM
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Not a complete update...but an update ;-) Got 2 sets of rods back from the machine shop.
Turned a set of gen3 4.8 and 5.3 rods into floating pin! I had em anyway so why not right? I actually may put arp rod bolts in both....my machine shop wants to see exactly what happens to the big end when that happens. So, since these are honed to spec, i will likely get the reg and pro2000 rod bolts and have em checked out! Will report back.
For those keeping score the weight diff is ~1%
*no nudes from before sorry*
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Last edited by tech@WS6store; 05-09-2018 at 02:38 PM.
Old 04-27-2018, 03:42 PM
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Originally Posted by tech@WS6store
Not a complete update...but an update ;-) Got 2 sets of rods back from the machine shop.
Turned a set of gen3 4.8 and 5.3 rods into floating pin! I had em anyway so why not right? I actually may put arp rod bolts in both....my machine shop wants to see exactly what happens to the big end when that happens. So, since these are honed to spec, i will likely get the reg and pro2000 rod bolts and have em checked out! Will report back.
For those keeping score the weight diff is ~1%
*no nudes from before sorry*
Gen3 "floating" rods
I like the floating pin idea and really interested to see what happens with the rod bolts.
Old 05-01-2018, 01:23 PM
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Another update!
9 pics so click and swipe...or drag...or whatever

Engine nearing completion. Just the covers left pretty much.
Since this engine is ALSO spoken for and the customer wanted the melling 10295 option, we added it!!

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Old 05-09-2018, 01:58 PM
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372 is done! 333 RA is being balanced...or OVER balanced if you will ;-)

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Also I MAY have stumbled across 2 gen4 5.3l blocks for cheap (traded them for my firstborn) and will be using them instead for the 5.1l and possibly the all stroke 360. Id like to keep the iron 5.7 as an iron block. Budget build info on the 372 to follow.
Old 05-09-2018, 02:20 PM
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372 build break down.
This will not include the price of the long block as i got it due to the 6.0s carrying a RIDICULOUS price lately and some being reasonable. Also the machine shop prices will obviously vary from place to place etc. Also were able to reuse the stock pushrods. Doesnt save alot but does help a little.

So the retail parts

Rpmspeed 243/799 castings with surface job, 3 angle seats and stock valves $850. Add in the LEADFOOT 2.000/1.57 valves $189.

Ws6store beehive cam kit $515 - tsp stage2 high lift cam with pac 1218 beehives

Ls7 lifter kit with ls2 trays - $139

Rpmspeed hd rockers - $215 reused stock bolts

Rpmspeed Heavy Duty Rebuild Kit - $699
Customer optioned melling 10295 and billet timing chain set for a total of $775

Include new plug kit $18


Basically $2700 gets you a brand new 372 cid engine...not counting machine work but that was only $800 so not a huge deal there.

All those prices INCLUDE shipping as well.
The 372 is buttoned up and ready to rock soon...but on to the next 4 now!
The 333 will be next. Excited about that one!! Then likely build the 5.1 and all stroke 360 at same time...maybe even the iron 347 if i can find a spare block soon enough...which i think i can.
Old 05-09-2018, 02:27 PM
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Subbing to this one!
Old 05-15-2018, 12:37 PM
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Subscribing. Some interesting builds here .


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