408 GTO results
408 GTO results DYNOS GRAPHS ADDED
Just had my 408 rebuilt by SNL Performance and wanted to share some new numbers.
Lq9 408
PRC 237 heads (milled to 62cc i believe)
SNL cam (244/248 112+4 .653/.615 lift
Ported Fast 90/90
SNL 4" CAI w/ 100mm MAF
Kooks 1 7/8 long tubes w/o cats
Magnaflow Catback
With my heavy 19" CSL rep wheels, made 511/495
Removed the 19's and put some stock 17's on and made 526/499. The wheels are eating up 15 whp! I'd like to see what kind of difference some really light wheels would make.
Car feels great and is a beast. I will try and get my dyno sheets posted when I have some time and will also update numbers after motor has been broken in.
First graph is with 19" wheels. Second is with stock 17's.
Just had my 408 rebuilt by SNL Performance and wanted to share some new numbers.
Lq9 408
PRC 237 heads (milled to 62cc i believe)
SNL cam (244/248 112+4 .653/.615 lift
Ported Fast 90/90
SNL 4" CAI w/ 100mm MAF
Kooks 1 7/8 long tubes w/o cats
Magnaflow Catback
With my heavy 19" CSL rep wheels, made 511/495
Removed the 19's and put some stock 17's on and made 526/499. The wheels are eating up 15 whp! I'd like to see what kind of difference some really light wheels would make.
Car feels great and is a beast. I will try and get my dyno sheets posted when I have some time and will also update numbers after motor has been broken in.
First graph is with 19" wheels. Second is with stock 17's.
Last edited by EmanGoat; Apr 16, 2010 at 05:37 PM.
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Sorry guys, I've been so busy and havent been able to get to those graphs. I am at a work computer and cant post now but I will get the graphs up soon. I too was amazed at the power loss from just the wheel swap. I have not weighed the wheel/tire difference. I am possibly about to buy some new 19's that weigh 20 lbs (rear), which are significantly lighter than the stock 17's. Larger and heavier tires will offset some of that difference however, but it would be pretty amazing to get those 15 hp back and then some with the lighter wheels.
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Nice results! Get Steve or Matt to post up the graph for everyone! I hear the torque curve on that thing was sweet!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
I'll be posting results when I get it back this week, but long story short, it's getting a new motor. Evidently the thrust bearing took as **** and loaded the oil pump up with spare pieces, which locked it up and killed the motor. For some reason, they don't like to run without oil pressure. It was still running when it came off the trailor, but it had a pretty good knock to it.
New forged 370 H/C, etc... I'm aiming to **** off, er uh, please some 408's
New forged 370 H/C, etc... I'm aiming to **** off, er uh, please some 408's
Last edited by hivoltagedriver; Apr 20, 2010 at 06:50 PM.
I'll be posting results when I get it back this week, but long story short, it's getting a new motor. Evidently the thrust bearing took as **** and loaded the oil pump up with spare pieces, which locked it up and killed the motor. For some reason, they don't like to run without oil pressure. It was still running when it came off the trailor, but it had a pretty good knowck to it.
New forged 370 H/C, etc... I'm aiming to **** off, er uh, please some 408's
New forged 370 H/C, etc... I'm aiming to **** off, er uh, please some 408's
12:1 NA for now, then I will switch heads and drop the CR to around 10-10.5:1 later for a Harrops blower. Steve said the motor would take a pretty good hit of nitrous, but I am just not a huge fan of spray. Much rather have the power all the time, and I am really impressed with the results they are getting from the Harrops 2300.
12:1 NA for now, then I will switch heads and drop the CR to around 10-10.5:1 later for a Harrops blower. Steve said the motor would take a pretty good hit of nitrous, but I am just not a huge fan of spray. Much rather have the power all the time, and I am really impressed with the results they are getting from the Harrops 2300.
