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Old 02-10-2017, 09:16 PM   #1
GTO_0755
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Can the LS2 hit 500rwhp SBE?!?

Hello everyone, well I am finally finishing my build that I have always wanted which is a 500rwhp stock bottom end GTO. Recently the car got some Lingenfelter CNC Ported and Polished 243 Heads, 2.02"/1.57" One Piece Stainless Steel Valves, New Valvetrain, New Exhaust Gaskets, New LS3 Head Gaskets, and the heads were milled .013" putting the motor at 11.2:1 Compression. I had previously already installed a set of Simens DEKA 55lb Injectors, so I also recently had a DW300c Fuel Pump installed. Previously
, the car made 463rwhp/458lbtq down in South Texas in 100+ degree weather.. This was prior to the recent Heads and Fuel Pump. The car will be getting tune by James at SNL Performance February 18, so I will post results once I get them. Hopefully all goes well!

Below I have attached the list of all the mods I've done on my GTO over the last 5 years:

Motor/Transmission
-DuSpeed OTR Intake
-Nick Williams 102 TB
-FAST 102(non ported)
-FAST Fuel Rails (Red)
-Hinson Motorsports Braided Fuel Lines
-Siemens DEKA 55lb Injectors
-Deatschwerks DW300c Fuel Pump
-MSD Spark Plug Wires
-NGK TR6 Plugs
-Billet Engineering Catch Can
-Pacesetter 1 3/4th Longtube Headers
-3in Pacesetter Catless Mid Pipes
-Custom Kooks Street Screamers 3in
-Custom Grinded EPS Cam (234/242 .605/603 112+4
-IWIS Timing Chain
-Powerbond 25% Underdrive Pulley
-Melling High Volume Oil Pump
-Front Timing Chain Cover Gasket
-TSP .660" Dual Spring Kit w/ PAC Valve Springs and Titanium Retainers & new Seals
-COMP Chromoly 7.325 Pushrods
-COMP Rocker Trunion Upgrade
-Morel 5290 Linkbar Lifters
-Lingenfelter CNC Ported & Polished 243 Heads(Milled .013")
-2.02"/1.57" One Piece Stainless Steel Intake & Exhaust Valves
-3 Angle Valve Valve Job
-11.2:1 Compression Ratio
-TSP GM LS3 Multi-Layer Steel Head Gaskets
-TSP GM Multi-Layer Exhaust Manifold Gaskets
-ARP Head Bolts
-LS7 Clutch
-Hinson Motorsports Speed Bleeder
-Hinson Motorsports SS Braided Clutch Line
-Hinson Polyurethane Motor Mounts
-Hinson Polyurethane Transmission Mount
-Fbody Slave Cylinder
-MSD 2Step Launch Control
-Amsoil 10w-30 Motor Oil
-Amsoil ATF Transmission Fluid
-DOT 4 Fluid
-SpeedDensity Tune by Rick Clarke @ Unlimited Performance
-463rwhp/458lbtq (untuned currently)

-Weight Reduction
BMR Light Weight Skid Plate
Removed Heat Shields
Removed Spare Tire
Removed Towing V Brace
Removed Trunk Brace
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-DuSpeed OTR
-FAST 102
-NW 102
-3in Kooks Street Screamers
-Pat G Custom EPS Cam
-Lingenfelter CNC Ported and Polished 243's

Last edited by GTO_0755; 02-14-2017 at 08:32 PM.
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Old 02-11-2017, 04:31 AM   #2
JimmyGTO
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Dang man, that's a super nice setup. Should be a beast and haul butt. The only tiny thing I see where you could pick up a handful of horsepower is the 1 3/4" headers. You should pickup another 8-10 hp going to 1 7/8" especially if you are at 500 hp, if you think the money is well spent. Good luck on the dyno. Keep us posted.

How are the kyb shocks doing for you? I have the exact same setup, but haven't driven it since installing the struts and shocks. I'm running 1/2" drop in front and stock height lovells in the back along with air bags.
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Old 02-11-2017, 05:36 AM   #3
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I didn't see upgrade for rear axles. You will need that for 500+ rwhp.
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Old 02-11-2017, 05:39 AM   #4
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is this question real life?
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Old 02-11-2017, 05:40 AM   #5
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with just the right heads/cam/intake setup and supporting mods? yes
with boost? easily
with nitrous? LOLZORS yuevenmoddingbro
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Old 02-11-2017, 06:25 AM   #6
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And LOL at listing things like oil and stock replacement parts on a mod list...
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Old 02-11-2017, 08:39 AM   #7
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Port match that fast intake. the port alignment on stock heads leaves alot to be desired and Id imagine ported heads would be even worse. It's really easy to do and it's free.
Do everything you can before the tune because IF you don't get the number you'll be kicking yourself for not doing more.
I think it'll be close to the goal and if you don't make it oh well, it's just a number.
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Old 02-11-2017, 09:27 AM   #8
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it's not the port alignment, it's the joints from the runners to the lower manifold. it matches fairly close to the stock heads.
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Old 02-11-2017, 09:28 AM   #9
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just tell them to use STD correction, OP.
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Old 02-11-2017, 03:11 PM   #10
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I don't think the question is can it do that, I think the question is "how long will it last"

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Old 02-11-2017, 04:39 PM   #11
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500whp isn't a problem for the shortblock.

h/c/i will wear hard on the valvetrain, though.
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Old 02-11-2017, 09:55 PM   #12
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Thanks for the feedback everyone. As for the rear end, yes it is still stock. Don't plan on upgrading the rear until it break lol. As far as how long it'll last, I'm sure a while. Car doesn't get drive much, just sits in a garage. My apologies for listing replacement parts, it's just a list I have made throughout the years in case I ever sell the car. UPDATE on the car is that it will be running on straight E85. Some say it's not beneficial for N/A others say it is. In my opinion I have the Injectors and fuel pump, might as well do it. I do wish I had the 1 7/8th Longtubes; however, I managed to get the Pacesetters for $135. As far as for the correction on the dyno it will be SAE. That's what it was when I made 463/458. But, of course every dyno is different. At the end of then day it is just a number. I'm sure it's going to run 100x better than before.
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Old 02-11-2017, 09:59 PM   #13
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Quote:
Originally Posted by JimmyGTO...View Post
Dang man, that's a super nice setup. Should be a beast and haul butt. The only tiny thing I see where you could pick up a handful of horsepower is the 1 3/4" headers. You should pickup another 8-10 hp going to 1 7/8" especially if you are at 500 hp, if you think the money is well spent. Good luck on the dyno. Keep us posted.

How are the kyb shocks doing for you? I have the exact same setup, but haven't driven it since installing the struts and shocks. I'm running 1/2" drop in front and stock height lovells in the back along with air bags.


They are pretty decent. I mean it's better than stock. I'll be doing coilovers eventually. It's cheap and did the trick! Feels pretty smooth, still a bit rough when you hit a pot hole but it's not terrible for the price
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Old 02-12-2017, 04:50 AM   #14
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Quote:
Originally Posted by Nothubertjfarnsworth...View Post
it's not the port alignment, it's the joints from the runners to the lower manifold. it matches fairly close to the stock heads.

Welp on my aftermarket heads the alignment sucked! I'd figure anything with a non stock ( since you said it's not bad) port size or shape could benefit from this free mod.

Quote:
Originally Posted by GTO_0755...View Post
UPDATE on the car is that it will be running on straight E85. Some say it's not beneficial for N/A others say it is. In my opinion I have the Injectors and fuel pump, might as well do it. I do wish I had the 1 7/8th Longtubes; however, I managed to get the Pacesetters for $135.

Great choice now bump that compression up!
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Old 02-12-2017, 12:08 PM   #15
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Welcome to 2007. Still going with the stock SB.

https://youtu.be/z21MepuHe2g

https://youtu.be/s2rKmw2DDZY

I think it made 508 at 7050rpm or something like that before I switched to a Powerglide and Gear Vendors unit. It has been a very long time now, so I would have to go back and look. It can last, and make 500+ easily. Just stay on top of the valvetrain.
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Old 02-12-2017, 08:58 PM   #16
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Quote:
Originally Posted by Kingsize...View Post
Welcome to 2007. Still going with the stock SB.

https://youtu.be/z21MepuHe2g

https://youtu.be/s2rKmw2DDZY

I think it made 508 at 7050rpm or something like that before I switched to a Powerglide and Gear Vendors unit. It has been a very long time now, so I would have to go back and look. It can last, and make 500+ easily. Just stay on top of the valvetrain.


Wow that's awesome to hear man! Texas goat as well! I'm hoping I can do a bit more than 500rwhp since I'll be on E85. Your car is exactly where I want to be at! Mind sharing the mods when you took that video
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Old 02-12-2017, 09:00 PM   #17
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Quote:
Originally Posted by Nogomofo...View Post
Welp on my aftermarket heads the alignment sucked! I'd figure anything with a non stock ( since you said it's not bad) port size or shape could benefit from this free mod.



Great choice now bump that compression up!



Compression is now at 11.2:1. Not much, but enough to squish out someone Hp lol.
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Old 02-13-2017, 05:07 AM   #18
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Wow that's awesome to hear man! Texas goat as well! I'm hoping I can do a bit more than 500rwhp since I'll be on E85. Your car is exactly where I want to be at! Mind sharing the mods when you took that video

E85 won't really help out your peak numbers. You'll definitely get some under the curve though.
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Old 02-13-2017, 05:17 AM   #19
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And 11.2 isn't enough. I'm at 11.56 with a thinner head gasket on 93. I personally would want to be in the 13.5 range to justify me swapping over to E85.
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Old 02-13-2017, 05:48 AM   #20
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Quote:
Originally Posted by Kingsize...View Post
And 11.2 isn't enough. I'm at 11.56 with a thinner head gasket on 93. I personally would want to be in the 13.5 range to justify me swapping over to E85.

n/a guys have seen gains, though. you're right, you aren't really timing limited on pump gas at such a low compression yet, but it can still yield some benefit.
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Old 02-13-2017, 05:52 AM   #21
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They see gains for sure. Just not enough for a justification of inconvenience in my personal opinion. Unless I'm taking full advantage of its benefits mind you. With extra compression I would be all over it.
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Old 02-13-2017, 06:10 AM   #22
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They see gains for sure. Just not enough for a justification of inconvenience in my personal opinion. Unless I'm taking full advantage of its benefits mind you. With extra compression I would be all over it.

I totally understand what you're saying. The benefits from being able to run more timing in a boosted/high CR compression app usually far eclipse the relatively small gains you can see from just running the fuel on an n/a engine with fairly nominal compression. It's totally a no-brainier at that point.
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Old 02-13-2017, 06:12 AM   #23
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Quote:
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I totally understand what you're saying. The benefits from being able to run more timing in a boosted/high CR compression app usually far eclipse the relatively small gains you can see from just running the fuel on an n/a engine with fairly nominal compression. It's totally a no-brainier at that point.

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Old 02-13-2017, 08:25 AM   #24
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Setting aside getting more timing out of the engine, don't forget E85 also reduces the chance of detonation and keeps things cooler inside the combustion chamber although these effects are less noticeable with N/A.
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Old 02-13-2017, 06:16 PM   #25
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Why don't you go flex fuel?
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Old 02-13-2017, 08:31 PM   #26
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Why don't you go flex fuel?

The car will not be driven more than once or twice a month. I'll be buying a new car in the next 2 or 3 weeks. And I ran out of funds lol. Money is going towards new car.
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Old 02-14-2017, 05:06 AM   #27
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The headers are not limiting factor as far costs its your heads. I made 482 with 225 heads, cam, stock injectors, ported stock intake, and 1 3/4 long tubes. Will you notice a huge difference...nope. You also posted a crap tone of mods that have nothing to do with making 500 + rwhp.
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Old 02-14-2017, 08:36 PM   #28
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The headers are not limiting factor as far costs its your heads. I made 482 with 225 heads, cam, stock injectors, ported stock intake, and 1 3/4 long tubes. Will you notice a huge difference...nope. You also posted a crap tone of mods that have nothing to do with making 500 + rwhp.

Stock Injectors on yours build and still managed to make 482? Interesting. Why didn't you you get a FAST102 or MSD? My apologies for posting the rest of the mods, I have fixed that. You could have made much more Hp on your build.
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Old 02-15-2017, 04:34 AM   #29
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I have a FAST 102 now but you wont see a huge gain for the $ compared to a stock ported intake. The other parts alone where hurting the pocket book. I've had issues with valve springs and waiting to fix that before throwing in injectors. Not sure it will even make it now since I have 373s. To be honest I should have went procharged. I would have spent just as much.
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Old 03-23-2017, 11:05 AM   #30
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Sorry guys that I have not updated the results.

So, went to dyno a few month back and I actually lost cylinder #2. We did various electrical test, spark test, etc. The motor still has compression; however, the injector for cylinder #2 took a shit. I have now bought a new set of injectors brand new and will be waiting on a tuning date in the next few weeks.

With that being said, the car still made 407rwhp/398lbtq on ONLY 7cyl! The car is still on e85, and is loving it. I will keep you guys updated once the new injectors are on and Ill have a video link, and pictures of the dyno graphs. Stay tuned!
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