Checking in on this thread once in a while, super pumped to see you so happy with the progress. In for sweet 4k vids!
Thanks brother! Very eager to get behind the wheel and see what type of power she puts down.
Not to toot my own horn but think its safe to say I'll have one of the gnarliest RX8 builds there are to date thanks to the mastermind behind all the fab work.
We're gonna work with Arun out of CPP also for a Jam Cam kit down the road.
Maybe have the beast himself tune it and get her on the dyno after the 8.8 install.
Has anyone looked into Jim Riskovsky Jr's LS2 GTO build? When he had the stock LS2 block he ran a D1SC with very impressive numbers. I'll quote them below.
results last year in this forum.
730 SAE RWHP Dyno Runs
This thread is constantly being updated so please check back from time to time. or check http://turboconnectionracing.com/for...opic.php?p=2#2
The BIG NEWS here is that this STOCK LS2 project has blasted a number of myths out there as to what is necessary/mandatory to make 779(to date) RWHP. Its my daily driver and its been dead reliable full throttle blast after blast!
THESE RESULTS WERE ACCOMPLISHED WITH:
stock fuel rails
stock fuel lines
42 lb injectors
10.9 to 1 compression
93 octane pump gas
stock LS2 cam
stock LS2 engine
two core intercooler
12.5 psi boost
D1SC supercharger
unported LS2 heads
stock rod bolts
ethanol injection not water/methanol
stock pistons
Follow along below for all the details:
(541.5 SAE) July 28, 2006 Dyno Session recorded 557 RWHP equipped with 7 psi D1SC, 60 lb injectors, stainless works exhaust, Spec 3+ clutch and aluminum flywheel, one ethanol nozzle, and a "very conservative tune."
(576.2 SAE) Aug 18, 2006 Dyno Session recorded 598 RWHP and 513 RWTQ with 42 lb injectors and "more aggressive tune."
(604.8 SAE) Oct 6, 2006 Dyno Session yeilded 622.3 RWHP @ 6400 rpm's and 543 RWTQ @ 5200 rpms With the following modificatons: 1.85 Ratio Comp Cams Pro Magnum Rocker arms, 160 degree thermostat, 8 oz Pro Blend Oil additive, 0-30W Castrol Syntec Synthetic motor oil, Nitto 245 40 17 DR's with ambient temps near 70 degrees. The waviness of the previous dyno runs is gone as well, we believe due to the DR's. Rather than opting to simply change the blower pulley, we felt that optimizing the existing combination first would prove far more reliable. A/F appeared that more fuel was needed.
(622.9 SAE) Oct 31, 2006 Dyno Session made 641 RWHP @ 6800 rpm 552 RWTQ @ 5200 still at 7 psi boost by adding more fuel and alky(second progressive controller with #15 nozzle) and still no knock on 93 octane pump gas was detected.
(664.9 SAE) Nov 17, 2006 Dyno Session made 682.8 RWHP 598.5 RWTQ With 10 psi boost and a third # 15 alky nozzle![/B] A/F appeared more fuel from 6400 rpms up is needed.
(707 SAE) Dec 7, 2006 Dyno Session made a whopping 766 RWHP 662 RWTQ Actual, 733 RWHP @ 6200rpm 633.6 RWTQ STD (707 RWHP SAE) Only modification was modified air inlet elbow and huge air filter. The air filter and elbow modification increased boost by a solid 2.5 psi. At 5000 rpms we measured 10 psi, 12.5 psi at 6200, 14.5 psi at 6800 rpm's. More fuel is DEFINITELY needed from 6000 to 6800 rpms. I believe 780 RWHP+ (Actual) is possible once we have done so.
(729.9 SAE) Dec 27, 2006 Dyno Session made 757 RWHP 640 RWTQ (Actual @ 55 degrees), 751.2 RWHP@ 6800rpm 14.5 psi /635.7 RWTQ, 751.2 RWHP/635.7 RWTQ (STD), 729.9 RWHP/609.7 RWTQ (SAE) With 4th alcohol nozzle.
Mid range picked up over 20 lbs torque at 4500 rpms.
(730.9 SAE) Jan 8, 2007 Dyno Session made 757.9 RWHP/650.5RWTQ (Actual @ 49 degrees), 751.2 RWHP@ 6800rpm 14.5 psi /635.7 RWTQ, 751.2 RWHP/642.9 RWTQ (STD), 730.9 RWHP/624.2 RWTQ (SAE) With minor alcohol adjustment.
(731 SAE) Jan 16, 2007 Dyno Session made 778.9 RWHP 669.4 RWTQ /ACTUAL UNCORRECTED(47 degrees) (SAE unchanged)
(731 SAE) April 5, 2007 Changed to 3.375 Blower pulley picked up 10 ft lbs torque now at 635 RWTQ SAE, RWHP unchanged. Tried fuel additive from Pro Blend No Change in HP or Torque Observed. I have a special inlet adapter purchased from Reichart racing to increase air flow into supercharger but its going to require some modification to make it work. they have reported gains of 30 to 50 HP with an F1 supercharger. I also have the GZ Motorsports vacuum pump but have to reposition the MAF and boost tube for clearance.
May 11, 2007 Eagle Torquemaster plugs showed no power gain on this application.
http://good-times.webshots.com/photo...50151074FrHZrF Air Filter Mod
http://good-times.webshots.com/photo...50151074sbJmfZ Dyno Sheet
GZ Motorsports vacuum pump installation Pics (Chassis Dyno results coming soon!):
http://good-times.webshots.com/photo...50151074zQeTBG
http://good-times.webshots.com/photo...50151074hBDvpn
http://good-times.webshots.com/photo...50151074aSMpWR
[Here's a complete list of modifications performed to date, latest mods listed in bold:
Stock 2005 LS2 engine.
ATI D1SC Procharger 3.375 inch blower pulley
2 Core Sheet metal Intercooler
93 Octane fuel
Twin SMC Alcohol Injection Progressive Systems running 4 #15 nozzles and two controllers on straight 113 Octane Ethanol
http://good-times.webshots.com/photo...50151074mXZmjq Bottles in trunk
http://good-times.webshots.com/photo...50151074BHpRcw Dash mounted controllers
http://good-times.webshots.com/photo...50151074mDcmxl Nozzle placement
Stainless Works complete exhaust system*
http://good-times.webshots.com/photo...50151074CNEkgg Stainless Works Exhaust
BMR Drive Shaft*
BMR Drag Bags*
Spec 3+ Clutch with aluminum Flywheel
160 degree SLP thermostat*
1.85 Comp Cams Pro Magnum Rocker arms
Valve cover spacers
Comp CAMS 918 Beehive springs with Titanium Retainers
Denso Iridium Plugs
MSD 8.5 Plug wires
Nitto 245 45 17 Drag Radials
45 lb injectors (upgrading to 63's shortly)
Flow Charger Fuel Pump Voltage Booster connected to SMC Alcohol kits With alcohol lubricant
255 LPH LPE fuel Pump Upgrade
Kenne Bell BAP connected to 255 LPH pump
GMM Ripper Shifter purchased from Speed Inc*
Diff Techniques spool and axles*
Koni Adjustable Struts and shocks
Mickey Thompson E/T street Slicks
Mickey Thompson 17 inch Front runners on modified spare wheels
Hotchkis Adjustable front and rear sway bars from LMPerformance*
Tuned By MCG using HP Tuners*
* Designates products purchased from LS1GTO forum sponsors.
I have been installing turbos and superchargers on engines for two decades and I have NEVER seen an engine respond to boost as favorably as the LS2! A mere 7 psi boost made 641 RWHP with alky, exhaust, and 1.85 rockers added 321 RWHP and climbing! What an amazing engine!! On our third pull/fifth dyno session at 10 psi boost the LS2 made 682.8 RWHP...additional tuning alone should improve those numbers.
Modifications that are being considered are listed below. We will continue to update the thread as those results unfold.
65 Lb Injectors
Fuel System Upgrades(larger fuel rails reg etc)
E85 Fuel
1.95 Ratio Jesel Shaft rockers
Nitrous Outlet NX Express Nitrous N-tercooler System http://www.nitrousexpress.com/Catalo...ntercooler.pdf
Meziere Electric water pump
Evans NPG plus coolant
Relocate IAT
Remove MAF screen
Change to 2 bar MAP and go SD
Twin Disk Clutch
557 RWHP D1SC @ 7psi, 60 lb injectors, stainless works exhaust, Spec 3+ clutch and aluminum flywheel, one ethanol nozzle, and a "very conservative tune."
598 RWHP and 513 RWTQ with 42 lb injectors and "more aggressive tune."
Makes me think that with my build specs I should be pretty close to 600 depending on the tune!
-D1SC 6-8psi
-80lb injectors
-StainlessWorks LT Headers
-2.5" X pipe, no cats
-Monster LT1-S Twin Disc Clutch
-Ported LS2 Intake
-92MM TB
-320lph Fuel Pump W/ Walboro 255 wired to kick in at 5psi
-Venturi Jet Pump kit
