---------------------------------------------------------- - 2007 Silverado Classic 4x4 Extended Cab 5.3l - Black Bear Performance ... SilveradoSierra.com - Chevy Truck Forum | Silverado Sierra GMC Truck Forums The only site focused on Silverado/Sierra trucks exclusively. Does anyone have any experience with these late model 454s? Bench race away fellas.only issue is the factory vavletrain is non adjustable..It is MPFI. Staying N/A, what would you do to get this thing to make more usable power? The stock intake has to stay to stay CA smog compliant. The Vortec 8100 isn’t super impressive in stock trim, but it’s designed for heavy duty work. This page was generated at 02:51 PM. Hey all. The 5.3L replaced the 5.7L because automakers have to constantly improve on fuel economy and reliability. They are factory rated at 290/410, but this is a 454 we are talking about here. That 8.1L is going to outpull a 6.5L any day of the week, and get better mileage than a 454 doing it. Timing chains are pretty solid on the ls motors, My truck has 385,000km on original chain no odd sounds, really dont think you have to worry about them.The only issues I have ever seen on the ls motors timing components are a result of huge cams. What cam would you guys recommend with stock heads? I thought the same thing, 8.1 swap, but I think the 454 has a bit of potential with a few changes.All times are GMT-8. Have I tied your hands enough?
I know timing belts have to be replaced every 80,000 to 100,000 miles, but what about chains? Remember, 6k lb. They are factory rated at 290/410, but this is a 454 we are talking about here. That will enable you toWell, to the average poor guy(like me) a 454 is still a big motor. Re: Vortec 454: School me! I thought the same thing, 8.1 swap, but I think the 454 has a bit of potential with a few changes. Other versions of the Vortec 8100 make as much as 550 horsepower and 690 lb-ft. Vortec 8.1: Tuning Potential. The new 5.3L fall under GM's 5yr / 1000,000 mile powertrain warranty. Re: Life expectancy of a Timing Chain Jan 19 2019, 4:50pm Timing chains are pretty solid on the ls motors, My truck has 385,000km on original chain no odd sounds, really dont think you have to worry about them. The engine has a bore and stroke of 4.24 inches x 3.99 inches.
Oh, and it's gotta be smog legal. The valve train has an overhead valve, ohv, configuration with two valves per cylinder. It had 410 torque at 3,200 rpm. I have been researching all over the internet looking to find out what it is that holds the power back on these engines. I want this thing to be able to pull as close to a diesel as possible. And this is a factory roller setup. ;)believe it or not, the 8.1 uses the same heads as the Vortec 454 as well as the same cam (from my research). But other then that, only if I was in that deep fixing something else on a high mile motor and then it just makes sense to do it.I'll be done when I'm finished, if that's not fast enough, take a number!I know timing belts have to be replaced every 80,000 to 100,000 miles, but what about chains? The 8.1L isn't a bad engine, just likes fuel since it's a gas burner. In a mild form these things should be good for 350 horspower and 450 ft/lbs right?Well, to the average poor guy(like me) a 454 is still a big motor. In a mild form these things should be good for 350 horspower and 450 ft/lbs right?Does anybody know the dirt on the Vortec 454 engines? The ls3 style tensioner system can break with big thumping cams and the ls1 style cam sprocket bolts have been known to back out. That is also going to limit my head choices since the intake is oval port if the heads are right? Still runs great, uses/leaks a little oil ~1/2 quart in 2500 miles. LOL. I'm looking at buying a used 1994 to 1998 GMC sierra 4x4 1500 with a 5.7 Vortec. I like big blocks.
truck. - 2002 GMC Sierra Denali Quadrasteer 6.0L AWD, 4.10s, K&N FIPK, Blackbear, Dumped Magnaflow, Goodmark Cowl - - 1994 K1500 Chevy Blazer Silverado TBI 5.7L 4x4, Last year of … Let's say 1500 rpm up to 4500-5000 rpm. Now, let's add the wrench to the gears that this engine is in a 1 ton 4wd crew cab truck. It won't get diesel mileage, but considering the size of the engine, they do pretty dang good really. Stock stuff seems to hold up great.2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.I' think I've only replaced just the chain once on a stock engine because it had over 300k and the timing was all over the place. Like I said earlier, standard big block parts won’t fit on the Vortec 8100, so the performance parts available for it are close to none. 192K on a '92 fullsize Blazer.
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