I have an 8.1 in a jet boat and love it. My cruising speed is around 30 at 3000 rpm. What people’s thoughts on prolonged use at higher rpm’s. Wot on mine is 4000 rpm at around 50 mph. In a 22ft river boat. How much is too much for too long. When I was a kid running old 2 ton trucks with big blocks it was no more than 3500 for more than a minute or two.
LS HAS BETTER INTAKE MANIFOLD, BETTER VALVE ANGLE HEADS, BIGGER BETTER CAMSHAFT AND A TOUCH MORE COMPRESSION, ALSO MORE STROKE, LIGHTER PISTONS AND BARELY BEATS THE OLD SBC 😂😂😂
The only aftermarket parts needed was intake and cam. Everything else you can buy for the 5.7 will work. Valve springs,larger valves, roller rockers etc. that's the reason it seemed like there wasn't a bunch of aftermarket parts but they would just be making what was already made. Carburator intakes you could get and as far as cam if you really wanted one they would grind one with no problem. In fact they would be ecstatic to do it and want you to keep them informed on how the build goes and would offer insight. Turbos ,superchargers,roller timing ,gear to gear timing all fit from the 5.7. electric water pumps hell I have even seen a dual quad intake with a set of 450 cfm carbs and i swear you would not know it was a v6 by the sound. The 4.3 for an s10 pickup can be built into a monster with no suspension work and snapping the rear end saving money over a 350 drop. All you need is a good locker to throw into the existing chunk! Corvette servo and quick shift kit. While they are spinning tires your gone!
The biggest issue missed by many on an LS can selection is the intake design is very much like and or mirrors the characteristics oof an individual runner intake, and how a tight LC cam creates a reversion pulse, which on a common plenum intake can be masked, as another runner will pick up the reversion pulse, however on an Individual runner intake, or most non common plenum LS intakes it makes a huge difference
Could you put an m90 blower onto a 4200? If so I would absolutely love to see how and what kind of gains could be made. I think it could be an amazingly cheap and fun junkyard option. Although I think a centrifugal supercharger on a 4200 would be the holy grail of power, fun, and reliability.
May 2007 Motor Trend ran an article outling how to build a 500 HP 4.3 V6 and gave GMPP part numbers for 18 degree heads, 4-bolt main blocks, etc. Check it out.
I have a forged 3.6 stroke crank for the evenfire 1 piece rear seal blocks. Not cheap but way better than the stock cast iron crank, and should have no issues making 4 digit power with a good build and good tune.
Brodix makes aluminum heads, but to be honest they are 70’s port and chamber design and the 96+ vortec heads are far superior. What’s needed is a good single plane efi intake for the vortec heads. I have fully ported 96+ vortec heads with 2.00/1.57 valves that flow 266/192@.600 lift. And they are not max ported.
I made a big mistake ordering from Jegs. I placed an order for the Memorial Day sale. The price and promo discount was correct on the screen, then I clicked submit order and they raised the price $84. That has to be some type of fraud. Now I’ve been on hold 58 minutes and over 50 people are in front of me on hold. I’m just trying to cancel my order they screwed up. I hope nobody on here orders from Jegs and their garbage customer service.
I'm a welder,fabricator and do some machineing work professionally in a custom shop not production and I was actually was doin some pondering how hard it would be to take a lathe to spin it true and fabricate a follower to transfer the shape with a motor with a diamond grinding wheel like they do with wood lathes and weld up and regrind a 4.3 cam to any lobe of a cam you have on hand... Then just polish it to me logistically it seems doable? Only thing that would probably be a good idea is only roller cams where theres no weird flat geometry of a flat tappets cam and the hardening process is not as crucial as a flat tappets as far as i can figure, just some wondering goin on, but i may be way off... I'm sure people will say that's a stupid idea but if nobody tried oddball stuff humans would still be bare assed beating on stuff with rocks sure as hell wouldn't have what was a super computer at one point in our pockets or humans greatest all time achievement the small block Chevy!
I've watched Steve on various shows for decades. He has educated, informed, or entertained me more than he would ever know. A true class act in the engine world. May the Lord bless him in his new stage of life..
Dam I'm building a lq9 for my rcsb sierra. And I feel like the cam I Got was too small after watching this. I got the summit 209 217 550lift 112 lsa stage 1 cam
Frieburger said that the ending of the Engine Masters show was unrelated to Steve retiring. Is there a deeper reason to it being cancelled then? Easily my favorite show they had.
