Is this lt1 really dynoing at 411 rwhp?
Is this lt1 really dynoing at 411 rwhp? Someone on the boards is selling an ls1 fbody clone with an lt1 and claims it is hitting 411 rwhp. I could be wrong but it seems a little high. This is through an A4 w/3500 stall. Here are the specs. Is this right?
Engine Bored .030 over (355ci)
Stock Crankshaft
Stock Connecting Rods
Speed Pro Power Forged Pistons
Speed Pro Plasma Moly Rings
Melling High Volume Oil Pump
Melling Steel Oil Pump Shaft
Comp Cams 468 XFI Camshaft
Comp Cams Comp R Lifters
Comp Cams Hi-Tech Chromemoly Push Rods
Comp Cams BeeHive Valve Springs
Comp Cams Pro Magnum 1.6 Roller Rockers
LT4 Extreme Duty Roller Timing Set
Stock LT1 Heads Ported and Polished (Flow 283cfm @ .600 Lift)
Ferrea 6000 Series 2.02 Intake and 1.60 Exhaust Valves
ARP Head Bolts
Hooker Ceramic Coated Super Comp Long Tube Headers
Custom Off-Road Y-Pipe with Dynomax Bullet
Stock LT1 Intake Port Matched to Heads
Ford Motorsports 30lb Injectors
Aeromotive Adjustable Fuel Pressure Regulator
Holley 58mm Throttle Body
Granatelli Red Anodized MAF Ends
Custom LS1 Air Intake with SLP Lid
MSD 6A Ignition Box
MSD Blaster Coil
MSD Super Conductor Wires
NGK TR6 Spark Plugs
LT4 Knock Module
Custom Tuned By Brian Herter
Racetronix 255 Fuel System
No A/C (has a/c delete pulley)
No Airbags
Engine Bored .030 over (355ci)
Stock Crankshaft
Stock Connecting Rods
Speed Pro Power Forged Pistons
Speed Pro Plasma Moly Rings
Melling High Volume Oil Pump
Melling Steel Oil Pump Shaft
Comp Cams 468 XFI Camshaft
Comp Cams Comp R Lifters
Comp Cams Hi-Tech Chromemoly Push Rods
Comp Cams BeeHive Valve Springs
Comp Cams Pro Magnum 1.6 Roller Rockers
LT4 Extreme Duty Roller Timing Set
Stock LT1 Heads Ported and Polished (Flow 283cfm @ .600 Lift)
Ferrea 6000 Series 2.02 Intake and 1.60 Exhaust Valves
ARP Head Bolts
Hooker Ceramic Coated Super Comp Long Tube Headers
Custom Off-Road Y-Pipe with Dynomax Bullet
Stock LT1 Intake Port Matched to Heads
Ford Motorsports 30lb Injectors
Aeromotive Adjustable Fuel Pressure Regulator
Holley 58mm Throttle Body
Granatelli Red Anodized MAF Ends
Custom LS1 Air Intake with SLP Lid
MSD 6A Ignition Box
MSD Blaster Coil
MSD Super Conductor Wires
NGK TR6 Spark Plugs
LT4 Knock Module
Custom Tuned By Brian Herter
Racetronix 255 Fuel System
No A/C (has a/c delete pulley)
No Airbags
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Man you guys are pretty hard on LT1's???? My 355 that I had two years ago did 422 RWHP, and 407 RWTQ naturally aspirated and my heads didn't flow nearly what that guys heads did. In fact my heads flowed 258 cfm on the intake at .600 and 203 cfm exhaust at .600. I had eagle 6" h-beam rods, SRP pistons with 11.75:1 compression, and a stock crank with 2 bolt mains... Cam was an extreme energy 236/242 .556/.576 cam with a 112lsa... With that and a ported manifold and a 58mm throttle body....
I had a Gen VI piggyback DFI system and with the timing turned up and 104 octane race gas it got as high as 437 RWHP. Torque stayed the same.... It ran a best of 11.72@119 on motor with a T56...
Don't sell LT1's short. 355's can be built mean as hell.... and with very basic mods can easily surpass 400RWHP...
I had a Gen VI piggyback DFI system and with the timing turned up and 104 octane race gas it got as high as 437 RWHP. Torque stayed the same.... It ran a best of 11.72@119 on motor with a T56...
Don't sell LT1's short. 355's can be built mean as hell.... and with very basic mods can easily surpass 400RWHP...
Originally Posted by 572BBC4thgen
Man you guys are pretty hard on LT1's???? My 355 that I had two years ago did 422 RWHP, and 407 RWTQ naturally aspirated and my heads didn't flow nearly what that guys heads did. In fact my heads flowed 258 cfm on the intake at .600 and 203 cfm exhaust at .600. I had eagle 6" h-beam rods, SRP pistons with 11.75:1 compression, and a stock crank with 2 bolt mains... Cam was an extreme energy 236/242 .556/.576 cam with a 112lsa... With that and a ported manifold and a 58mm throttle body....
I had a Gen VI piggyback DFI system and with the timing turned up and 104 octane race gas it got as high as 437 RWHP. Torque stayed the same.... It ran a best of 11.72@119 on motor with a T56...
Don't sell LT1's short. 355's can be built mean as hell.... and with very basic mods can easily surpass 400RWHP...
I had a Gen VI piggyback DFI system and with the timing turned up and 104 octane race gas it got as high as 437 RWHP. Torque stayed the same.... It ran a best of 11.72@119 on motor with a T56...
Don't sell LT1's short. 355's can be built mean as hell.... and with very basic mods can easily surpass 400RWHP...
It could also be those are STD corrected numbers. They are most likely locked numbers. A "locked" auto does not lose to much compared to a manual car...Now a 12 bolt that's a different story....
TECH Fanatic
Joined: Nov 2003
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From: The point of no return...
I'm not being hard on the LT1. It's a very potent engine when setup properly. I just didn't expect an auto with a 3500 stall and 12-bolt to make that much power. It must be a nasty h/c combo. I should learn more about LT1's.
www.eportworks.com and go to his "products" page. That LE2 package is kick *** price/performance. Hell, the LE1 package is only $800. Hard for me to decide whether to get my LT1 heads ported for $800-1100 or go buy a set of ported LS1 heads for my LS1 for $800-1100.
Originally Posted by WS-Sick
I'm not being hard on the LT1. It's a very potent engine when setup properly. I just didn't expect an auto with a 3500 stall and 12-bolt to make that much power. It must be a nasty h/c combo. I should learn more about LT1's.
Originally Posted by BlackHawk T/A
Good then you can learn all about the Opti-Crap and oil leaks
Actually, I'v been lucky in the leak department.....OPTI....now that's another story.....
Well, I am shooting for 470 with some air intake modifing (before t-body), So they can make a little hp...
I will admit though, if mine was a LS1 Stroker with great heads, I know I could get my numbers over 500 right now... 
What the hell was GM thinking? 
