OK, no replies yet in the "engines and internal" spot so I'll try here. I'm looking for some 4th gen owners here to fill me in on some LS1 specs. Preferably only stock or mild bolt-ons here, please! So, I'm thinking of retro-fitting an LS1 into my truck (as opposed to my 383, which I may put to good use as a super-street motor) because of the EFI and power. NOW, I'm wanting to know... Have any of you guys ever had a dyno on your LS1? I want to know ACTUAL power rating, not the conservative 320 horsesGM gave it. I'm willing to change the intake and put headers on there, headers were planned on anyway. Input please?
Also, I would be getting all of it, including the tranny. My truck weighs 3300lbs, which I believe is close to a 4th gen, so how about economy guys? It's a DD truck and if I was getting more than 20mpg I would be a happy camper. Specter, Stig?
I know I'll prolly get a lot of pro-LS1 biased answers but that's what I'm looking for.

 

there is a dyno thread in the general tech section.

my TA made 331rwhp and 310rwtq with minor boltons (lid and catback). normal is in the 290-310 range for stock depending on the dyno, and thats about 350crank hp

 

Ah, that's one thing I forgot to ask: I'm not big on how the computers work and everything, I'm still researching. I may be mistaken, but tearing off the cat. wouldn't screw up the function of anything, right? Sweet, I'll check the dyno page... With a little tuning, intake, and headers, I should be able to get beyond 400 horses, right?

 

Running catless will not screw up anything but the environment.

 

OK, good I didn't miss anything then. Catless it is then, It'll still be better than running the engine I've got in there now.

 

All it would do is trigger a Service Engine soon light

 

Hmmm, that's interesting. Annoying maybe, but no biggie... Is there any way to over-ride that?

 

O2 simulators. What year is said truck?

 

'Tis a '79 chevy stepper. I know I can find kits to retro-fit it in the way of oil pan and motor mounts, so I figured if I could find a good LS1 I'd go for it.

 

Would that even have a light to trigger?