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My new LSX combo, the quest for 7's

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My new LSX combo, the quest for 7's

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Old 11-08-2018, 07:59 PM
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My new LSX combo, the quest for 7's

Thought I’d post an update in the power adder section. Seems I like building new combos as much as I enjoy driving the car, so after running the stock bottom end 5.3 combo for 2 years, and going faster than the previous twin turbo SBC combo did, (5.40 @ 134mph at 3700lbs) I figured it was time to change it up in an attempt to go faster.

I’ll keep this thread updated as the progress continues with the new engine/turbos and turbo kit but now now I’ll start with a basic break down of the new combo. To start here are some photos of some of the many past combos the car has seen lol.

First off was a Vortec headed 383 with a Tremec TKO600, was a lot of fun but ultimately just not fast enough. Even on the spray. Pulled is Fall of 2013, sold it all and went down the dark road of boost lol.

Thought I’d post an update in the power adder section. Seems I like building new combos as much as I enjoy driving the car, so after running the stock bottom end 5.3 combo for 2 years, and going faster than the previous twin turbo SBC combo did, (5.40 @ 134mph at 3700lbs) I figured it was time to change it up in an attempt to go faster.

I’ll keep this thread updated as the progress continues with the new engine/turbos and turbo kit but now now I’ll start with a basic break down of the new combo. To start here are some photos of some of the many past combos the car has seen lol.

First off was a Vortec headed 383 with a Tremec TKO600, was a lot of fun but ultimately just not fast enough. Even on the spray. Pulled is Fall of 2013, sold it all and went down the dark road of boost lol.



The second combo was a Twin turbo 400ci SBC. This combo was killer. Made a TON of power, and in only 4 passes had already been 8.35 @ 170mph on a marginal track. The turbos were a pair of Billet S467’s from Jose at Forced Inductions. Ultimately is wasn’t as streetable as I wanted. With the Solid roller, 18 degree heads, dry sump etc it was to much race car and not enough street car. Pulled it after a year of abuse and as I had pushed a lot of the components past there advertised power level, I found that I had bent every single rod in the engine after a year. I had aspirations of building a turbo big block at the time so I parted out the combo and sold it all.



While collecting parts to build the BBC that never came to be, I decided I didn’t want to sit out for a few years while doing so. So I came up with a fairly economical plan of keeping the car running and continuing to have fun with it. After seeing the success of many others with the stock bottom end LS engines, I dove head first into a SBE 5.3 combo. The engine was treat to opened up ring gaps, a BTR stage 2 turbo cams, ARP head studs, ARP rod bolts, LS9 head gaskets, chromoly pushrods, trunnion kit and a set of used dual valve springs. I re-acquired my smaller Billet S366 turbos back from a friend and slapped it all together. What I thought would be a quick and easy swap turned into A LOT of work. But in the end I pushed the 5.3 harder than I ever thought I would and went faster than I had in the previous years with the SBC (a lot of that came with tuning and experience on what the car liked a would take) but ultimately it reminded me that they don’t live forever and in August of 2017 it broke #6 piston and put a rod out the side of the block LOL. I wanted to finish off the season on a high note, so I pulled it out, stripped the good valve train parts and in a matter of 10 days had the car back out pushing it harder than I ever had. (35PSI and 7800) Ultimately decided I wanted to stick with the LS platform for now so now.


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Old 11-08-2018, 08:02 PM
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Re: My new LSX combo, the quest for 7's

I decided to stick with the LS platform for now as I feel its more than capable of accomplishing any of my current goals and allows me to get the car much lighter and maintain a hydraulic roller camshaft.

New engine is Based off a World Products Warhawk block, and a pair of Warhawk LS7X heads.

The rest of the combo is as follows

- Dart billet CCW 4.00” stroke crank

- Callies Ultra Enforcer rods

- Diamond LS2k pistons (10:1 cr) 4.135” bore with a DLC coated 0.250” wall tool steel pin.

- Total seal AP stainless rings

- Custom ground turbo cam from comp cams (spec’d by myself) 242/248 @ 0.050”, 0.716”/0.716” lift with a 1.8 rocker, and 115LSA installed on a 111ICL.

- Comp Cams short travel lifters

- Custom manley valves 2.250/1.600

- PAC 1208X valve springs with titanium retainers (approximately 170lbs on the seat and 470 open)

- Trend 3/8” 0.135” wall pushrods

- Jesel y2k shaft mount rockers, 1.8 ratio

- Cloyes billet timing set with IWIS single timing chain

- Custom Williams manufacturing aluminum oil pan

- Melling HV pump

- Cometic head gaskets

- Holley cast aluminum tall valve covers

- Precision Metalcraft LS7 short sheet metal intake

- Precision 225lb/hr injectors



















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Old 11-08-2018, 08:08 PM
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Re: My new LSX combo, the quest for 7's

The local 275 class I occasionally run follows PSCA 275 rules which limits me to twin 72 mm turbos. My billet S366 turbos made great power, and I considered running them again with this combo however wanting the most out of this combo I decided to sell and upgrade them. The new turbo and turbo kit is comprised of the following components:

- 2 Borg Warner S472 turbos. 83mm turbine wheels with 1.10 AR divided T4 housings

- Hotside will be custom fabbed leaving the turbos in the same location. Using all stainless components from Stainless Bros.

- 1 7/8 up and forward stainless turbo headers from Flowtech

- 2 50mm turbosmart wastegates

- PT3000 air to water intercooler replacing the massive chiseled performance air to air Ive run for the past 3 years. The plan is to move the radiator further forward and to place the intercooler directly in front of the engine between the turbos. This is done in an attempt to keep a 55-56% weight bias on the front of the car to control wheelies.







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Old 11-09-2018, 08:53 AM
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Re: My new LSX combo, the quest for 7's

I cant wait to see where this goes. Your threads are always detailed and informative.
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Old 11-09-2018, 02:07 PM
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Re: My new LSX combo, the quest for 7's

so freakin awesome!!
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