Ok i know the 350 H.O W/Vortec heads is 330HP and the base LS1 Crate engine is 320HP.

What is the weight difference of the 2 engines?
Are the Gen 4 T.A's heaver than the Gen 3 T.A's?

Will a 84 T.A with a 330HP Crate 350, 700R4 w/shift kit, 3.73's, Sport tyres and a mild weight reduction beat a fairly stock Gen 4 T.A?

3rd Gen Weight = ?
4th Gen Weight = ?
350 H.O weight = 540lbs (roughly).
LS1 Weight = ?

THANKS!

Edit: Oh i just saw a pick of a LS1 without the cover on it, That is one funny looking motor.

 

A crate LS1 is 390lbs. The iron block and iron heads of the 350 vortec will add about 150lbs I think. Plus a little extra for the aluminum intake since the LS1 intake is plastic.

 

so it is roughly 555lbs with all the stuff on it.

 

320 is more like the net rating on the LS1's, as in net flywheel horsepower.

Comparing the two is like predicting the outcome when one guy brings a knife to a gun fight.

 

yeah but i mean the LS1 over here is used in the Holden comodore VT, VX and VY they are around 1420kg or 3130lbs and they are rated 220 to 240kw.
If i have a 330HP 350 in my T.A with the stats stated in my post above will i be able to beat one of these?

Dose any one know what the stock weight of a 84 Trans-Am is?
coz I cant find it out.

Stock T.A exept for:
All emmisions system / computer (atleast -5kg).
Aircon (atleast -20KG).
Heater box. (maby -2kg).
12" sub and box (+5kg).
BIG amp (+3kg).
6x9's (+3kg).

 

Your crate 350 wont likely beat it. Its horsepower rating is with headers, no water pump or altenator and an open carb (gross hp). The LS1 is with those still on and stock manifolds (net hp).

 

unless you put your engine in a wheelbarrow you will never be lighter than a
4th gen well besides maybe stripping the entire interior then i think the wheelbarrow would look better

 

GM allegedly rates their crate motors the same way they rate their production engines (SAE specs, rated at the flywheel). However the conditions of the test can vary in the case of a crate motor- many are tested with headers, limited accessories, etc.- like the 350HO is). But in the case of the LS1 crate motor they pretty much just carried the "as-installed in a 4th gen" rating over to the crate motor.

And even that number is HIGHLY suspect. In the case of the LS1 I think they "sandbagged" the number right across the board regardless of application. Those motors often put down close to 300HP AT THE REAR WHEELS in dead-stock 4th gens (despite their factory 305-325HP ratings as installed in the car) with stock manifolds, stock exhaust, full accessories, etc. Most of the magazines that have tested the LS1 crate motor with open headers and limited accessories on a dyno have found they put out closer to 400 in reality. Other GM crate motors often exceed their official ratings as well in similar tests, but not by nearly as much.

 

yes the LS is a beast but the FEDS have forced GM to keep it in the cage do to all of the tree huggers threatening to throw themselfs in niagra falls if the engines were to loud or used to much gas... yes they FORCED gm to regulate how much gas a LS could use... most notible CAGS..

 

Dude, dont compare traditionnal sbc with an LSx base engine. Its like day and night. LSx are better in every way, more reliable and get 25mpg all day long. Go test drive a 98-02 SS or Vette and the next day you will be the new owner of an LS1 crate!

 

What if i bolt a under hood supercharger to the 350-H.O will that beat it?
Its designed for an LS1 but i can make it work with my engine

 

Shouldnt this thread be in theoretical racing board? There are many LS1s out there with many different HP ratings with many different mods. Why dont you tell us what your power goal is and we go from there?

 

i just want to know what i can do to my car to make it beat a stockish LS1 if it is possible, i want a new engine but want to keep it under $6,000AUD - $4660USD.

 

Ok, well first third gens are lighter than 4th gens, so theoretically if you make the same or more power you will win not including driving experience or other factors.

Next, you will need additional mods to back up the new 400HP engine you will have. You have to upgrade the suspension, transmission, rearend, chassis stiffening, and bigger brakes to slow you down. If you are on a strict budget for all of this, you need to do some serious searching and research beore you plan on races with LS1s. I hope the budget you posted is JUST for the motor, because it isnt going to stretch out to covering everything mentioned. Just my 2 cents.

I am on a semi-budget if that makes sense. It is not strict, but is not unlimited. I do NOT have emissions testing where I live, so it makes life much easier for modding. This is something else to consider if you do in your area.

 

Not a good idea with cast pistons, but if you don't ever let it lean out under boost, it'll survive.

 

ok this is a long time project.
the max i want to invest in to the car is about $15,000AUD not including paint (i will go way over, a budget never works for me).
i will do engine 350-H.O, suspension (1" lower) + performance shockers, getting a 5 speed manual, 9" diff, sloted/vented sports disks, 4" cowl hood, full repaint, a bit of weight reduction and a Holley 650 DP.
But that is over a 6 to 7 year time line.

Also the engine is still up for thoughts, duno what exact one i want yet.

 

Im looking at all of the discussion here and i own a 1984 z28 H.O 5.0 and a 2001 ss camaro.......... i was going to buy one of those 330 hp h.o motors but then i drove an ls1...lol......... the thing about the ls based motor is its in a whole different league than that 330 H.O.......you should figure a 15 percent power loss from crank to tire.......... i bought my ss completely stock and had it dyno'd............... the thing baselined at 302 rwhp and 326 rwtq..............that just didnt make sense due to the power loss theory............. the ls motors were way under rated in printed horsepower due to the fact that they didnt want to have it kick the corvettes *** in sales.....chevy relied on rich daddys buying 50,000 dollar vettes.....but who wants one if they can buy a camaro for a lot cheaper and is just as fast ya know?........but the fact of the matter is that the ls bases motor is the foundation of REDICULOUS HORSEPOWER 350 PRODUCTION the ls6, ls7, ls2,...........

Aluminum blocks, or "cylinder cases" as engineers say, are becoming common for production engines. Why? fuel economy and exhaust emissions regulation have forced vehicle weight reduction and aluminum blocks weigh less.
Plastic manifolds weigh less, run cooler.
From a performance standpoint, cylinder heads are the most significant feature of LS1.
The LS1 intake port volume is 200 cc. which is a bit of a misnomer because of some of that volume is used for injector spray space; nevertheless, intake volume is generous. The exhaust port volume is 70 cc. The valve seat angles are 30°, 45° and 60°. The chamber roof around the valves blends smoothly with the seat’s top angle. The valves are stainless steel. The intake valve size is 2.00 in. and the exhausts are 1.55-in. with both having smaller, 8mm. valve stems. The valve face angles are 30°, 46° and 60°. The valve guides are pressed-in, sintered-iron units impregnated with material that enhances lubrication. Chamber displacement is 67.3 cc which makes for a compression ratio of 10.2:1
The rocker arm ratio is 1.7:1
In all reality the LS1 generates 345hp at 5600 rpm and 350 lbs/ft. torque at 4400 rpm. Maximum engine speed is 6200 rpm

Bottom line is the LS1 is just a hell of a design and a hell of an engine.

I had mine tuned on the dyno and without ANY MODS WHATSOEVER, just a tune, i am at 325 rwhp and 347 rwtq..........i cant wait to mod it............gotta make the payments though lol..............

 

<--- Lots of drool. and i feel ya on payments taking away from modding.

I just wanted to add the 350 HO is basically an accessories swap, then straight drop in. The LS1 requires a few parts to fit into these cars. I don't remember specifics, but add a couple hundred dollars to your engine budget just for getting the engine to bolt up if you go the LS1 route.

 

Yeah being so mutch lighter would screw the way the suspension works wouldent it?
PLUS I don't want a computer or EFI, i like my old school carb thank you.

 

Venom,

One of the reasons I purchased my 350 HO Deluxe was a three-part series in CarCraft starting Sept. 04. I suggest you locate those articles--not only is the motor pretty impressive right out of the box (that is, crate), it also responds extremely well to up-grades.

JamesC

 

If you want to spend 5000 of that 15000 have you looked at the zz4?........its a bad mamma jamma..... that one is the one that interested me........if i had 15000 to spend i would go with a 400 small block you can get a turn key for around 7000 with 400 horse right out of the box.
part number:CE03cubic inches:350 Cubic Inchesliters:5.7 Litershorsepower:355 Horsepower @ 5,2500 RPMtorque:405 ft/lbs @ 3500 RPMcompression ratio:10.0 to 1block:4-bolt, cast iron, 4.000" borecrankshaft:Forged Steel, 3.480" strokehead, chamber size:Aluminum, 58cc chambervalve sizes (i/e):1.940" / 1.500"camshaft lift (i/e):0.435" / 0.460" hydrauliccam duration (i/e):208 / 221 degrees @ 0.050 liftwarranty:1-Year/12,000 mile limited warrantyprice:$4595.00
"Brand New" No Exchange Necessary

 

but that $15000 is in AUD not USD.
it is around $11655_USD.