On an 8.1, bell housing of SM465 bolts up just fine, and your current clutch pack will work just fine, just need to get 8.1 specific flywheel and that's it...ok, I'll stop with the 8.1 pestering, haha
CK5
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On an 8.1, bell housing of SM465 bolts up just fine, and your current clutch pack will work just fine, just need to get 8.1 specific flywheel and that's it...ok, I'll stop with the 8.1 pestering, haha
Yeah I got in my head the bell needed changed for some reason.
Need a flywheel for everything but a Gen1 SBC. So at least I can figure the cost.
So I don't know if you realize it, but lots of TBI 350s are roller cam capable. I just gave one away a few months ago. The one in my '90 Jimmy is as well. I found that out when I did timing set and intake gaskets. I have seen plenty of them drilled and tapped, and some just have the casting for the lifter spider and such.
So if this is for driving I assume you don't want to shift out of 4th on the road?
What's your typical speed and cruise RPM. My biggest whine about the 465 ( and the nv4500 for that matter) is the 3 to 4 split. The 8.1 could very well be the answer. But so could a cammed 6.0 or stroker 5.3 that makes it max power at 3 grand and over
What's your typical speed and cruise RPM. My biggest whine about the 465 ( and the nv4500 for that matter) is the 3 to 4 split. The 8.1 could very well be the answer. But so could a cammed 6.0 or stroker 5.3 that makes it max power at 3 grand and over
hmmm, you may have a point. I do tend towards big projects.Yeah but you're the guy building any entire house! That's like saying a 6.0L swap is as easy as building a house....
Dyno of a tuned stock 6.0 vs a 208 motor sports cam. I think this is the baby cam. The big baby just moved everything up and made a bit more power up top.
What no love for the 383 stroker?!?!??!?!?! LOL
but starting out at 3000 rpm.. 8.1 465ft lb torque @ what.. ummm ... turn key.. that would be... called?????? idle??? LOL
We were just talking about this, the port cross section of any ls is like a large port 190cc sbc head vs the port of those are 160ish or so depending on the head so the capacity for the engine to be a torque monster below that 3k threshold is greater regardless of the cam.. also cubes obviously. So unless a roots style huffer is installed or strokes made bigger etc I don’t see any ls aside the ls7 making the low end torque.. I just don’t see it.. the stock cam is tiny so if it was gonna do it stock would be the way it would do it..
I run between 2200-2800 on the highway. That’s operating at the speed limit.
When we dynoed a similar (that I’m looking at building) engine before, it was making 415 peak tq at 3100 and 370 hp at 5600.
https://sites.google.com/site/sloppywiki/everything-ls/lsx-head-cast-numbers-flow-swap-info
Check here, depending on the engine you’ll either get a 200/210 cc intake port.. well duh that’s prob the main reason they don’t make the low end torque and combine that with flow potential of 230-260 cfm stock.. it’s obvious.. a small cam won’t make up the difference.
Check here, depending on the engine you’ll either get a 200/210 cc intake port.. well duh that’s prob the main reason they don’t make the low end torque and combine that with flow potential of 230-260 cfm stock.. it’s obvious.. a small cam won’t make up the difference.
It’s an option as well. My concern is rod angularity on the 383s. A good stroker likes 6” rods, and then it gets expensive. My spreadsheet will have a 383 option, couple 5.3/6.0 options, and a BBC in addition to the SBC
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And just for fun:
The last 350 we built, had a sister. Identical as much as we could.
Flat top pistons
Factory unported 1.94 cast iron heads (76cc chamber) and intake.
.410 lift hydraulic flat tappet
Dynoed 425 Hp at 6100, 460 lb/ft
The last 350 we built, had a sister. Identical as much as we could.
Flat top pistons
Factory unported 1.94 cast iron heads (76cc chamber) and intake.
.410 lift hydraulic flat tappet
Dynoed 425 Hp at 6100, 460 lb/ft
http://users.erols.com/srweiss/tablehdc.htm#Chevy
Here’s port flow for Lots of different heads. The Vortec head gets close but the port volume is much lower..
Here’s port flow for Lots of different heads. The Vortec head gets close but the port volume is much lower..
All of this makes me think back to the late 60's Buick engines like the 430 and first 455. Small valve heads, combined with the stroke and rod combo gave great torque numbers down low.
Did you say factory iron intake on that?
Those are damn near diesel low end numbers.. 455 if it wasn’t so dang heavy and weird parts wise it would be a good motor for this stuff
I really wanted to do a 500 Caddy in my old blazer way back when you could actually find one.
Yep cast iron intake. With a qjet
