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

 

I don't know nearly as much about LT1's but that's the highest I've seen for 355. I'm not sayhing i's BS though. I do know LT1's sound so though.

 

seems reasonable to me.....

 

355's are beasts

 

Seems like a very well built motor, I wouldn't doubt it. LT1's can be badass when they're nicely done.

 

wow very cool! I had no idea lt1's could get numbers like that

 

whats the specs on the cam? the heads are reworked but what are the specs of the cam?

 

very possible...we have done a few 355's in auto's and seen 390-400 rwhp. This was with 12 bolts , full exhaust and mild street/strip setups.

 

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...

 

Comp XFI lobes are stout. Much stouter than than the XE-R's that we run. There currently the harshest hydro lobe that I have ever seen.

 

Hell, I'm hard on them and I'v had a stroker in mine sense 97....

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....

 

Its absolutely possible. With good heads the sky is the limit, mine made abour 480 or so.... with an ATI

 

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.

 

Good then you can learn all about the Opti-Crap and oil leaks

 

AHHHHH....STOP THE INSANITY......damn it's true

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...

 

i hit 404 rwhp through an auto ! AI heads and cam and supporting boltons ! tuned by jeff creech at carolina automasters ! i have the graph but dont know how to post it !

 

Looks good to me. .

 

Oh I've heard all about the opti. What the hell was GM thinking?

 

Don't see any reason why not, gosh u guys are hard on Lt1 owners!! We just can't get any love??