Magnuson Supercharger, Valve Train and other supporting mods. 2007-2013, 5.3L Chevy Tahoe

[67RS427]

what do you guys think as far as dyno numbers?



what do you guys think as far as dyno numbers?

Changing the cam? That will make a world of difference... This is a 5.3l correct? I'd say you're looking at an extra 200hp depending on supporting mods and tuning. Get a nice cam and a little extra spice/timing in your tune and I'm sure you'd make 500whp if I had to make a guess. I'm making about 700whp but my motor is an entirely different beast.

*does your motor have square port heads like my L92? That makes a huge difference. I could be off on my HP estimate but I think it's pretty close. All depends how spicy you wanna get in the end. The motor will hold up fine. My final guess is 500whp with mods listed, more with a cam and slightly more aggressive tune.

 

[67RS427]

not sure what number are you talking about? could you please post it again

Here...

I'd go with a NGK one stage colder than a stock LSA. That would be a NGK TR7IX if you want the "best" iridium plug. However, I will say after going through two sets of them that depending on your boost levels, you may wanna skip the expensive iridium and go with a standard copper plug. I don't want or care if a plug lasts 100k miles with my 900hp "race" engine. I'm more than happy to do spark plug changes every 3k-10k miles on a race truck like mine. So in that case, the cheaper traditional copper plugs actually work much better with high cylinder pressure and will work better with more boost. Right now I'm running the NGK BP7EFS (3526). It took my forever to find a #7 plug that was copper and not platinum or iridium but my truck is much much happier with that plug. It's cheaper too and idles way better, motor is happier in general but I'm also running 15psi which is a higher cylinder pressure.

 

[Chrismnj]

ok, when looking for a spark plug, I need to match Spark Plug Thread Size and Spark Plug Reach correct?

 

[67RS427]

ok, when looking for a spark plug, I need to match Spark Plug Thread Size and Spark Plug Reach correct?

All the LS stuff is the same. The one I gave you will work. You can verify by pulling it up on the NGK site and compare it to your stock plug replacement from the AC Delco site.

 

[Chrismnj]

might get extra set, never know when they will discontinue them.

 

[Chrismnj]

would it be a good idea while doing headers to replace engine mounts?

 

[67RS427]

would it be a good idea while doing headers to replace engine mounts?

Absolutely, they are a common failure point but you are still low mileage. Wouldn't hurt, that's for sure. Just use Delco parts and not a cheap replacement.

 

[Chrismnj]

Absolutely, they are a common failure point but you are still low mileage. Wouldn't hurt, that's for sure. Just use Delco parts and not a cheap replacement.

is there difference between left and right? it is low mileage but its also 2012.

 

[kbuskill]

is there difference between left and right?

Don't replace with the factory style engine mount.

The mounts on these trucks are a hydraulic mount meaning they are basically an oil filled bladder to help reduce vibration.

With all the extra power adders your running you should either go with the solid mounts from AFP....
https://atomicfabandperformance.com/product/07-14-gmt900-poly-motor-mounts/

Or if you want less vibration and a more durable (solid) rubber mount, go with the passenger side engine mount from the Hummer H3 with the 5.3l...

GM part # 25847739

https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/263071877011

It is a direct fit for both sides of our trucks. It is also what most Police departments and fleet maintenance use on the PPV Tahoes.

 

[Chrismnj]

That’s interesting.