Some obscure LT1 questions...

**66LT1wagon** · 12-07-2005, 03:19 PM

I am new to the forum, and am looking for info on the LT1 engine. I have put one ('93 Camaro takeout) in my '66 Nova wagon, and I'm at the get everything hooked up to run stage. I am making my own fuel lines and noticed that one is 5/16 and the other is 3/8. I was expecting both the same size I guess. Anyways, I am assuming the 5/16 is the pressure line because it is the one that goes to the regulator on the fuel rail(where the vacuum line hooks up to), is this correct? Also, anyone have an F-body that could take some detailed pics of some stuff for me? Thanks in advance. Brian

**yellow93ta** · 12-09-2005, 05:43 AM

I have a 93 ta/ I can take some pics for you..I have my car in the garage for the winter, but I can get some pics within a day or two..and email them to you..what pics did you need...

Hark_Z · 12-09-2005, 10:52 AM

good lookin car yellowta, where are you located in missouri?

**yellow93ta** · 12-09-2005, 04:48 PM

Drexel, about 45 miles directly south of KC.

**66LT1wagon** · 12-10-2005, 06:35 PM

Specific pics I need are basically all the wiring and vacuum tubes and such on the top of the motor. The motor was already strarting to be stripped down when I got it so I need to know where all those hoses go especially. Basically if you could get close ups of the engine bay from the front, and one on both sides (I realize those engine bays are tight). Anything will be better than what I have now. Thanks in advance for any help.

**yellow93ta** · 12-11-2005, 07:51 AM

I will see what I can do, it will prob. be on tues. on my day off, I work 3rd. shift and sleep during the day but I will take them on tue...

**66LT1wagon** · 12-11-2005, 11:11 AM

That's cool, I'm not going to need them before that anyway. Thanks!

**camaro94** · 12-19-2005, 07:19 PM

I m new, and i was wondering whats the difference between a LT1 and a LS1?

**5.0THIS** · 12-19-2005, 10:35 PM

Originally Posted by camaro94

I m new, and i was wondering whats the difference between a LT1 and a LS1?

www.google.com

**skipjobe** · 12-31-2005, 03:12 PM

About 50 HP at the wheels and the ls1 really responds to mods our lt1's

**my5thNewUsernameHere** · 01-10-2006, 02:57 PM

Originally Posted by skipjobe

About 50 HP at the wheels and the ls1 really responds to mods our lt1's

Say that again....

**skipjobe** · 01-10-2006, 08:26 PM

About 50 HP at the wheels and the ls1 really responds to mods our Lts are a little more dificult to drag out the HP.
Sorry for the misprint.

**camaro94** · 02-01-2006, 05:29 PM

but what about the mechanics, why is the ls1 easier to get HP out of?--- and another question-- whats the difference between a big block and a small block?, i wonder b/c i hear people say "it has a small block 350, and another guy will say he has a big block 350, i don't understand.

**skipjobe** · 02-01-2006, 06:02 PM

I am not sure how they get the additional hp out of the ls1 but it is probably a combination of better heads and better intake and advanced electronics, the Camaro LT1 was rated at 275 HP at the rear wheels the LS1 is rated at 325 rear wheels. The technoligy has been around to get big HP out of an engine for years THe formula 1 engines are 1.8 liters about 108 cubic inches and make 1000 HP.
The small block chevy engine was introduced in 1955 and that engine design was used almost unchanged until the 1993 LT1 was introduced all internal engine parts were inter changeable for the most part. The engine started as a 265cu then 283, 302,305,307,327,350,400. they had different size bores and crankshafts and rods to make the different combos. The 93 LT1 had some parts that were still interchangable with the earlier versions but the heads and cams are different and they are controlled by a computer for all engine management. The LS1 was completely re-engineered it is still a small block but most parts are unique to that engine. Now for your big blocks the first I am aware showing up in cars was the 348 in 1958 followed by 400, 427,454 many of these were truck engines converted to car as high performance engines. They are bigger and heavier and maybe more expensive to build. The small block chevy can be pushed to 468 CU with custom parts. If you want brute strength and need to go 300mph start with a big block if you want a street racer or a track car that will go 120mph in the 1/4 mi stay with a small block

Hark_Z · 02-01-2006, 06:34 PM

Great info there, just wanted to correct ya tho about the 275 HP on the LT1 at the crank as well as the 325 HP for the LS! at the crank, not the wheels.

**skipjobe** · 02-01-2006, 07:47 PM

You may be right I am not an expert but they started rating them at the rear wheels at some point but I am pretty sure they are rating the LS1 at 325rwhp I was looking at dyno sheets today and that is what lightly modded LS1's are putting down, That nova should run pretty good with a LT1 motor, you shoud weigh in at about 2800# with a little work that should put in the 12's

**5.0THIS** · 02-02-2006, 01:11 AM

Originally Posted by skipjobe

You may be right I am not an expert but they started rating them at the rear wheels at some point but I am pretty sure they are rating the LS1 at 325rwhp I was looking at dyno sheets today and that is what lightly modded LS1's are putting down, That nova should run pretty good with a LT1 motor, you shoud weigh in at about 2800# with a little work that should put in the 12's

They were never and will never be rated at the rear wheels. No manufacturer rates their cars power at the rear wheels. LS1s do indeed put that much down at the rear wheels though, because they are underrated.

**skipjobe** · 02-02-2006, 06:57 AM

I don't claim to be any kind of automotive expert, I heard back when they started downgrading power because of I think they called it cafe' standards the beginning of EPA controls that they were using a different standard to rate HP I was told it was rwhp. I have been going on that mis infrmation ever since. I do know that the 327 came in versions from the 200's up to 365 hp the 69 Z28 had a 302 rated@300 that was closer to 400 my 94 and your 95 were rated at 275 What kind of rwhp would a stock 350 LT1 put to the ground ? 200 Is it possible that the new Camaros have not yet caught up with the 60's power levels. That is depressing. I have turned 13.1 on the motor and 12.3 on a 100 shot and have since added heads cam throttle body injectors and still not up to a 69 302 power levels. That sucks Thanks for bringing up to date I looked at a 2005 Mustang specs this morning and it is listed @ 300BHP. I have a friend with a 2005 Gt and the day he bought it he told me 300 at the rear wheels so I am not the only one walking around in a fog LOL.

**OneSlowLS1Vert** · 02-02-2006, 07:31 AM

^ BREATH

And space your thoughts with carriage returns.

LT1s put down around 250-260 HP stock at the rear wheels. My 97 with CAI, and open exhaust put down 274 RWHP.

LS1s put down 290-320 RWHP.

However, LS1s are still rated at 305 or 325 CRANK HP and LT1s are still rated at 275 or 285 CRANK HP.

There is nothing sad about it. And the change in HP ratings was when it went from manufacturer's arbitrary ratings to SAE net ratings, measured in BHP.