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Xanthos · 03-28-2009, 09:27 PM

Saw this section of the forums and figured I’d post a project blue print for my 400 flywheel horsepower, (stock) SS beating 1LS.

My build is rather simplistic, mostly because of how amazing this engine already is. The only internal work I plan on doing in the future is possibly a cam swap. Of course, there are no cams available for this engine yet, so my build is currently set to hit 400 flywheel horsepower (or close enough to it for practical purposes) without them. With them, I expect to be able to push that figure a bit higher.

Before reading this write-up, you have to understand that I have not, for obvious reasons, been able to actually get my hands on one of these cars. A lot of my figures are hypothetical, though based on as much fact as I could secure through extensive – and possibly even excessive – amounts of research.

With that said, let’s get started on the blueprint. For those of you who just want to see the numbers, feel free to skip to the end.

First up, the exhaust.

I plan on running a full 2.25 inch exhaust on my V6, which I feel will be plenty for a N/A engine – especially with the dual exhaust setup the V6 comes with. As it stands right now, the plan is:

Long Tubes – High Flow Cats (x2 per side) – stock piping – Borla XR-1 mufflers

Using this setup, exhaust flow should be restricted only by the 2.25 inch piping, at about 730 cm, which is acceptable to me. Ideal flow for 400 hp would be about 880 cfm*, so there will be a restriction still, but nothing extreme. The headers should flow far more than 730 cfm, the cats about 870 cfm**, and the mufflers should flow an amazing 1042 cfm*. The stock resonators will be replaced with test pipe if the final setup turns out to be too quiet for my tastes.

As this engine gained 18 rwhp from a catback alone***, I’m expecting about that from my exhaust not counting the headers or cats (while I won’t be “improving” the bends, I’ll be using much better mufflers), and I expect about 10-12 rwhp from the cats (there are four of them. Replacing the two cats on an LS1 nets 8 rwhp**) and about 20 rwhp (which I feel is very conservative) for the headers. So total we’re looking at about 50 rwhp from the exhaust.

Next up, the intake.

I’m going to be running a full 3 inch intake. From the TB, I will mount a 90 degree bend to send the pipe down straight in front of the engine. After this bend will be a Y-pipe, and then two more bends to bring the pipes out to the side and slightly up, allowing me to mount the air filters (of which there will be two) up and between the engine and the fenders – similar to the filter placement of the GMPP intake, except there will be one on each side. The MAF sensor will be mounted right after the Y converges. I expect to get as much power from this setup as D3 gained from their intake (13 rwhp***), if not slightly more.

Fairly straight forward.

Finally, the random bits.

If you’ve been using your calculator, you’d see that this setup so far will net me about 63 rwhp, or about 74 flywheel ponies, which still puts me 22 horses short of my goal of 400 fwhp. That’s where the last few mods come into play. With some advice from CamaroSpike23, I’ve come up with an idea for a system that should net me those last 22 (19 rw) ponies.

I’m going to split the vacuum line for the MAP sensor to two additional places. The first will be a stage 2 methanol injection system (the injector will be installed in the final space right before the throttle body). Basically what this means is that once the engine reaches a certain RPM the methanol will spray into the air stream at a rate based on intake pressure, which will cool the air and increase the charge density.

The second will be to a rising rate fuel pressure regulator, using a low fuel pressure/air pressure ratio. I’m looking at something like 2:1, but I’ll have to tune it after I get it installed, just like I’ll have to tune the methanol activation settings.

I’m fairly confident this will net at least the 19 rwhp that I would still need to hit my 400 fwhp number.

As for pricing, we’re looking at 505 for the headers, 260 for the cats (65 each x4), and 262 for the mufflers (131 each); about 150 for the intake, which will be custom built using the Spectre performance custom modular intake system; 579 for the methanol system; and 225 for the fuel pressure regulator.

For a grand total of $1981 not including the labor for installing the exhaust – not bad for 100 horses at the flywheel.

In addition to the engine mods (since I’m not one for a straight line only drag car) I’ll be getting the pedder’s sport suspension package (699.00) and rear coils (89.62 each – 179.24 total).

I’d also like to get the Baer Pro-Plus 6 piston brake upgrade, but at 3790 for front and rear, not counting install – it’s a bit pricy. I may just settle for some braided steel brake lines and a rotor upgrade when somebody comes out with them.

Total price – 25854.24 not counting labor on the exhaust and suspension. With the brake upgrade it would be right at 29650. Right about the same price as an SS after you count labor, and it should be about the same in a straight line, and a bit better in the curves.

And I tried to use very conservative numbers for the cases that didn't have solid research and dyno testing. I would expect long tubes to net more than 20 hp, for example.
- Xanthos

Related links:

Works Cited.

* catalytic converter flow testing: http://www.installuniversity.com/ins...n11.122001.htm

** muffler flow testing: http://www.broaderperformance.com/mu...flow_tests.htm

*** LLT V6 responsiveness to mods: http://www.camaro5.com/forums/showthread.php?t=5565

Parts catalogs.

1) headers: http://www.bestmufflers.com/bshop/pr...95d4b7d61b5671

2) cats: http://www.jegs.com/i/Magnaflow/642/91005/10002/-1

3) mufflers: http://www.jegs.com/i/Borla/157/40941/10002/-1

4) suspension: https://secure.merlinsoftware.com.au...&Level2=CAMARO and https://secure.merlinsoftware.com.au...?ProdCode=7955

5) methanol injection: http://www.snowperformance.net/product.php?pk=7

6) fuel pressure regulator: http://www.bellengineering.net/produ...&products_id=2 and bracket: http://www.bellengineering.net/produ...roducts_id=190

03-28-2009, 09:27 PM	#1
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	Project "Xanthos" blueprint. Saw this section of the forums and figured I’d post a project blue print for my 400 flywheel horsepower, (stock) SS beating 1LS. My build is rather simplistic, mostly because of how amazing this engine already is. The only internal work I plan on doing in the future is possibly a cam swap. Of course, there are no cams available for this engine yet, so my build is currently set to hit 400 flywheel horsepower (or close enough to it for practical purposes) without them. With them, I expect to be able to push that figure a bit higher. Before reading this write-up, you have to understand that I have not, for obvious reasons, been able to actually get my hands on one of these cars. A lot of my figures are hypothetical, though based on as much fact as I could secure through extensive – and possibly even excessive – amounts of research. With that said, let’s get started on the blueprint. For those of you who just want to see the numbers, feel free to skip to the end. First up, the exhaust. I plan on running a full 2.25 inch exhaust on my V6, which I feel will be plenty for a N/A engine – especially with the dual exhaust setup the V6 comes with. As it stands right now, the plan is: Long Tubes – High Flow Cats (x2 per side) – stock piping – Borla XR-1 mufflers Using this setup, exhaust flow should be restricted only by the 2.25 inch piping, at about 730 cm, which is acceptable to me. Ideal flow for 400 hp would be about 880 cfm, so there will be a restriction still, but nothing extreme. The headers should flow far more than 730 cfm, the cats about 870 cfm, and the mufflers should flow an amazing 1042 cfm. The stock resonators will be replaced with test pipe if the final setup turns out to be too quiet for my tastes. As this engine gained 18 rwhp from a catback alone*, I’m expecting about that from my exhaust not counting the headers or cats (while I won’t be “improving” the bends, I’ll be using much better mufflers), and I expect about 10-12 rwhp from the cats (there are four of them. Replacing the two cats on an LS1 nets 8 rwhp) and about 20 rwhp (which I feel is very conservative) for the headers. So total we’re looking at about 50 rwhp from the exhaust. Next up, the intake. I’m going to be running a full 3 inch intake. From the TB, I will mount a 90 degree bend to send the pipe down straight in front of the engine. After this bend will be a Y-pipe, and then two more bends to bring the pipes out to the side and slightly up, allowing me to mount the air filters (of which there will be two) up and between the engine and the fenders – similar to the filter placement of the GMPP intake, except there will be one on each side. The MAF sensor will be mounted right after the Y converges. I expect to get as much power from this setup as D3 gained from their intake (13 rwhp**), if not slightly more. Fairly straight forward. Finally, the random bits. If you’ve been using your calculator, you’d see that this setup so far will net me about 63 rwhp, or about 74 flywheel ponies, which still puts me 22 horses short of my goal of 400 fwhp. That’s where the last few mods come into play. With some advice from CamaroSpike23, I’ve come up with an idea for a system that should net me those last 22 (19 rw) ponies. I’m going to split the vacuum line for the MAP sensor to two additional places. The first will be a stage 2 methanol injection system (the injector will be installed in the final space right before the throttle body). Basically what this means is that once the engine reaches a certain RPM the methanol will spray into the air stream at a rate based on intake pressure, which will cool the air and increase the charge density. The second will be to a rising rate fuel pressure regulator, using a low fuel pressure/air pressure ratio. I’m looking at something like 2:1, but I’ll have to tune it after I get it installed, just like I’ll have to tune the methanol activation settings. I’m fairly confident this will net at least the 19 rwhp that I would still need to hit my 400 fwhp number. As for pricing, we’re looking at 505 for the headers, 260 for the cats (65 each x4), and 262 for the mufflers (131 each); about 150 for the intake, which will be custom built using the Spectre performance custom modular intake system; 579 for the methanol system; and 225 for the fuel pressure regulator. For a grand total of $1981 not including the labor for installing the exhaust – not bad for 100 horses at the flywheel. In addition to the engine mods (since I’m not one for a straight line only drag car) I’ll be getting the pedder’s sport suspension package (699.00) and rear coils (89.62 each – 179.24 total). I’d also like to get the Baer Pro-Plus 6 piston brake upgrade, but at 3790 for front and rear, not counting install – it’s a bit pricy. I may just settle for some braided steel brake lines and a rotor upgrade when somebody comes out with them. Total price – 25854.24 not counting labor on the exhaust and suspension. With the brake upgrade it would be right at 29650. Right about the same price as an SS after you count labor, and it should be about the same in a straight line, and a bit better in the curves. And I tried to use very conservative numbers for the cases that didn't have solid research and dyno testing. I would expect long tubes to net more than 20 hp, for example. - Xanthos Related links: Works Cited. catalytic converter flow testing: http://www.installuniversity.com/ins...n11.122001.htm muffler flow testing: http://www.broaderperformance.com/mu...flow_tests.htm * LLT V6 responsiveness to mods: http://www.camaro5.com/forums/showthread.php?t=5565 Parts catalogs. 1) headers: http://www.bestmufflers.com/bshop/pr...95d4b7d61b5671 2) cats: http://www.jegs.com/i/Magnaflow/642/91005/10002/-1 3) mufflers: http://www.jegs.com/i/Borla/157/40941/10002/-1 4) suspension: https://secure.merlinsoftware.com.au...&Level2=CAMARO and https://secure.merlinsoftware.com.au...?ProdCode=7955 5) methanol injection: http://www.snowperformance.net/product.php?pk=7 6) fuel pressure regulator: http://www.bellengineering.net/produ...&products_id=2 and bracket: http://www.bellengineering.net/produ...roducts_id=190 __________________ 2017 1LT/RS A8 Hyper Blue Metallic Last edited by Xanthos; 03-28-2009 at 10:22 PM.