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Bracket Talk Bracket Talk Forum Tech Talk - by Abruzzi Chevy LS engine build up for the ColoradoGo | New | Find | Notify | Tools | Reply | |
| Chevy LS engine build up for the Colorado | Login/Join |
| DRR S/Pro |
Illegitimi non carborundum | |||
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DRR Trophy |
After a closer look at my setup you are absolutely correct. Using the modified adapter I feed pressurized oil into the rear port to prime the engine while rotating by hand on the engine stand, the front port remains plugged. FWIW, the pump output pressure could be checked at the front passage way to verify the actual pumping pressure... | |||
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DRR Trophy |
I have heard a lot of good things about dry sump systems for the LS platform, but I really haven't seen a need for them in Drag Racing applications, mainly road course/drifting where the sideways G-forces cause oil to slosh side to side in the oil pan away from the pickup tube. I would be curious if there is any power gains though with a dry sump system on some of the stroker combo's with the long strokes and windage etc. Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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| DRR S/Pro |
You are certainly correct regarding sideways G-forces causing slosh. However don't overlook aeration of oil. David Reher warned of the "cyclone" on the inside of a wet sump system. Of course wet sumps have, and will continue to suffice. Interesting GM is quick to claim a 6hp gain for their NPP exhaust system on the Corvette, there is no such claim for their dry sump system. Of course with a stroker and racing RPM it would stand to reason. Pro Stock runs dry sump for some reason. Don't know what their justification is. Illegitimi non carborundum | |||
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| DRR Elite |
Roughly what HP build are you looking at Larry? Foxtrot Juliet Bravo | |||
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| DRR Elite |
My oil pressure issue boiled down to a missing cam retainer plate. As an LS noob, I didn't realize what I was missing. Great oil pressure now. Foxtrot Juliet Bravo | |||
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| DRR Pro |
Bucky, the way it is taking shape I think 725 - 750 NA with Dominator on Methanol. I will begin giving the details as the parts arrive. It will have a Brodix BR3 head worked by Eric Weingartner. The piston MAH197714865 will have around 12:1 compression And this intake https://www.cidheads.com/produ...0-carburetor-2-piece Cam Motion cam of yet to be determined specs. Johnson Race Hydro lifters with link bars [delete the plastic lifter trays] Dayton Sensors control box with 8 ignition coils. These are the major parts I have decided on so far. Larry Woodfin | |||
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| DRR Pro |
The above piston # is wrong. This is the correct number https://www.lsxceleration.com/...rings-set-197714865/ Larry Woodfin | |||
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| DRR Elite |
That's badass Larry. Very cool build. We are trying a stock bottom end 823 head build for my son's dragster. Over the winter we may throw a small single turbo on it to get it below super comp times and into the middle of the pack for many bracket races. Cheap way to do it anyhow. Foxtrot Juliet Bravo | |||
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DRR Pro |
Larry I do not know if you have heard a lot of those engines but Man do they have a distinct sound especially with 5 inch bullet mufflers. There loud too Sound awesome.  | |||
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| DRR Trophy |
How big do you plan on making it Larry? a 415? Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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| DRR Pro |
Nick, it will be factory dimensions for LS3. 4.065 x 3.625 = 376 CI Larry Woodfin | |||
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| DRR Trophy |
While it may not fit along the lines completely of this thread, I did pick up a project LS for my fourth gen Camaro. After looking at the motor for a while I can definitely get used to it. There is a lot more simplicity than you might think. After all, it still has four bolt valve covers and I oddly appreciate the amount of O-ring type gaskets and lack of silicone it would take to assemble should I take it apart. I can see a big advantage to this would be the fact they (LS’s) are already making a fair amount horsepower from the factory and have a fair amount of engineering, allowing for some higher RPM's. This way, the average racer is not trying to double or even triple the horsepower as we’ve done for years with a conventional small block Chevy. I can certainly with an Cam, intake an alcohol carburetor, I can see no reason an LS wouldn’t be a reliable efficient bracket motor. My biggest fear is getting the wiring lined out on a street car so it’s not a hack job, but the coil on plug and lack of distributor really allows for a better fitment options for what I’m doing with it, not to mention fuel injection for the street will be nice. The real problem is it’s super tempting to go ahead and bolt on turbo headers before I put the motor in! | |||
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| DRR Elite |
Even aftermarket setups are easier on the LS since many of the ECU's offer harnesses for the LS that drop right on. This really makes it fast and easy. Foxtrot Juliet Bravo | |||
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DRR S/Pro |
Would be nice to see a mini blower on the LS platform. That would be super cool, saw a SBF with a procharger in a dragster a couple of weeks ago. Keeping the Socialists and NEO-LIBERALS at bay with FACTS one post at a time !!! Freedom isn't free !!! Thank a veteran, they will actually appreciate it. | |||
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| DRR Elite |
I think the third post down is an altered with a magnison on an ls Couple other small blowers as you scroll down. Foxtrot Juliet Bravo | |||
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| DRR S/Pro |
Larry, Bucky and other LS3 practitioners. I just heard on a YouTube vid that LS3 engines have about 20* of variable camshaft timing. Is this true? If so I assume you have eliminated it for bracket purposes. Illegitimi non carborundum | |||
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| DRR Pro |
Canted, You are correct. This is a custom, hardcore race build. Cam timing is fixed. Larry Woodfin | |||
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| DRR Elite |
I eliminated dod and vvt Foxtrot Juliet Bravo | |||
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| DRR Elite |
https://www.facebook.com/groups/687000214775018 Foxtrot Juliet Bravo | |||
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Bracket Talk Bracket Talk Forum Tech Talk - by Abruzzi Chevy LS engine build up for the Colorado
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