lsx 454 mast motorsports - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RAB38 · 10-22-2010, 09:42 PM

Has anyone on here had a dealings with Mast Motorsports? I am thinking about going to an LSX engine in my blazer. I am torn between the N/A LSX 454 that Mast offers or buiding one on my own. I am also contemplating a supercharged ls based engine.

I want to get as much torque as possible, so I either need cubic inches or a blower.

I spoke with the guys at Mast and I like the fact that you get basically a turn key engine that is dyno tuned, but they are pricey. I am thinking I can do a close to stock LS3 with a maggi or KB and make the 640hp the LSX 454 makes.

Thanks

68GMCCustom · 10-22-2010, 10:03 PM

Isn't a Mast motor as pricey as buying a LSX 454 from GMPP?

Also...a better choice might be the "made for boost" LSX 376? It has (or had?) forged components and something like 9:1 compression (tho I've also seen 10.7:1?). I will say though all the ones I see lately for maybe $1-2k less (were like $7-8k?) then the "all forged" and have only forged pistons and a cast crank and rods.

And...in buying a LSX 376...you can always bore and stroke it out to 454 or so later...

this one is under $6k .....you'd probably want to upgrade the crank and rods to forged tho as only the pistons are forged on this one:
http://www.superchevyperformance.com...p/19171049.htm

**Clyde65** · 10-22-2010, 10:11 PM

If your looking at a turn key Ls based engine, look at these. no experience with them, just have heard about them is all.

http://www.turnkeyenginesupply.com/E...1&key=packages

MONTEZ · 10-23-2010, 02:39 PM

I can tell you that customer service and quality products are number one priority with MAST. You know you can get close to that kind of power from one of their ls3 based 427's for a good bit less. You sacrifice the iron block though. I help out in the dyno cell there at MAST and I watch the LS3/427's break a good bit over 600Hp all the time.

10-22-2010, 09:42 PM	#1
RAB38 Registered User Join Date: Nov 2005 Location: Southern Maryland Posts: 164	lsx 454 mast motorsports Has anyone on here had a dealings with Mast Motorsports? I am thinking about going to an LSX engine in my blazer. I am torn between the N/A LSX 454 that Mast offers or buiding one on my own. I am also contemplating a supercharged ls based engine. I want to get as much torque as possible, so I either need cubic inches or a blower. I spoke with the guys at Mast and I like the fact that you get basically a turn key engine that is dyno tuned, but they are pricey. I am thinking I can do a close to stock LS3 with a maggi or KB and make the 640hp the LSX 454 makes. Thanks __________________ 72 Blazer CST 383 stroker roller, fuel inj, t350,NP205, D60 front, 14b rear, detroit locker, 38 x15.50 mtz's, welds, cross over steering, custom cage,Line X Spray in liner, House of Colors Tangelo Pearl Orange

10-22-2010, 10:03 PM	#2
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: lsx 454 mast motorsports Isn't a Mast motor as pricey as buying a LSX 454 from GMPP? Also...a better choice might be the "made for boost" LSX 376? It has (or had?) forged components and something like 9:1 compression (tho I've also seen 10.7:1?). I will say though all the ones I see lately for maybe $1-2k less (were like $7-8k?) then the "all forged" and have only forged pistons and a cast crank and rods. And...in buying a LSX 376...you can always bore and stroke it out to 454 or so later... this one is under $6k .....you'd probably want to upgrade the crank and rods to forged tho as only the pistons are forged on this one: http://www.superchevyperformance.com...p/19171049.htm __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

10-22-2010, 10:11 PM	#3
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: lsx 454 mast motorsports If your looking at a turn key Ls based engine, look at these. no experience with them, just have heard about them is all. http://www.turnkeyenginesupply.com/E...1&key=packages __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

10-23-2010, 02:39 PM	#4
MONTEZ Registered User Join Date: May 2010 Location: Nacogdoches,Texas Posts: 330	Re: lsx 454 mast motorsports I can tell you that customer service and quality products are number one priority with MAST. You know you can get close to that kind of power from one of their ls3 based 427's for a good bit less. You sacrifice the iron block though. I help out in the dyno cell there at MAST and I watch the LS3/427's break a good bit over 600Hp all the time. __________________ Smoke Tires, not Drugs

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