Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

Pro vs Cons LS or L98, LT1

Thread Tools
 
Search this Thread
 
Old Feb 12, 2015 | 06:33 PM
  #1  
RicerEater's Avatar
Thread Starter
Junior Member
iTrader: (2)
 
Joined: Jun 2009
Posts: 89
Likes: 1
From: Charlotte NC
Car: 1992 Chevrolet Camaro Iroc-z
Engine: 305 TBI
Transmission: T5 T56 needs rebuild
Axle/Gears: 2.77 POSI with Disc brakes 9 bolt
Pro vs Cons LS or L98, LT1

I have no clue where to start... So any of you guys out there feel like sharing what you like and dislike about your set ups?

Last edited by RicerEater; Feb 14, 2015 at 12:39 AM. Reason: Timelime
Reply
Old Feb 13, 2015 | 06:49 AM
  #2  
Orr89RocZ's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (20)
 
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Pro vs Cons LS or LB9

Ls motor vs 305 lb9?

I dont see any pros to keepin the 305 unless you want an all original numbers matching car.
Reply
Old Feb 13, 2015 | 12:25 PM
  #3  
RicerEater's Avatar
Thread Starter
Junior Member
iTrader: (2)
 
Joined: Jun 2009
Posts: 89
Likes: 1
From: Charlotte NC
Car: 1992 Chevrolet Camaro Iroc-z
Engine: 305 TBI
Transmission: T5 T56 needs rebuild
Axle/Gears: 2.77 POSI with Disc brakes 9 bolt
Re: Pro vs Cons LS, L98, LS1 or older SBC 350

5.7... lb9...*cough* the boat anchor still haunts me... um I mean L98, LT1 so forth

Last edited by RicerEater; Feb 13, 2015 at 12:31 PM.
Reply
Old Feb 13, 2015 | 11:36 PM
  #4  
sofakingdom's Avatar
Supreme Member
20 Year Member
Community Builder
iTrader: (1)
 
Joined: Sep 2005
Posts: 27,879
Likes: 2,432
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Pro vs Cons LS or LB9

Can't think of ANY "pro" features of LB9 except pure unadulterated unvarnished LAZINESS.

Now if that describes YOU, .... then, ... I'm NOT sorry.

If on the other hand you have more of a bit of the spark that sets higher life forms apart from ... other .... things ... like amoebae and paramecia and bacteria, then, .... we can talk about it.
Reply
Old Feb 16, 2015 | 08:34 PM
  #5  
Pocket's Avatar
Supreme Member
20 Year Member
iTrader: (24)
 
Joined: Jun 2005
Posts: 8,117
Likes: 361
From: NC
Car: 91 Trans Am
Re: Pro vs Cons LS or L98, LT1

Whats your budget?
Reply
Old Feb 17, 2015 | 03:41 PM
  #6  
RicerEater's Avatar
Thread Starter
Junior Member
iTrader: (2)
 
Joined: Jun 2009
Posts: 89
Likes: 1
From: Charlotte NC
Car: 1992 Chevrolet Camaro Iroc-z
Engine: 305 TBI
Transmission: T5 T56 needs rebuild
Axle/Gears: 2.77 POSI with Disc brakes 9 bolt
Re: Pro vs Cons LS or L98, LT1

Time is money I have no real goals except getting a T56 and something not a 305 in it.
Reply
Old Feb 17, 2015 | 04:21 PM
  #7  
aliceempire's Avatar
Supreme Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (14)
 
Joined: Nov 2008
Posts: 2,093
Likes: 175
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Why do any changes without a goal? If money isn't a big factor, just find a hot gen 4 with a t56. No point in thinking about a gen 1 in that case.

Pros to a L98, lotsa low speed power. Easier to swap in.

Cons to a L98, every LS is going to be faster with the proper drive train.

The only real cons to a LS are cost and not direct drop in. But these days every part is available to swap one in.
Reply
Old Feb 17, 2015 | 06:30 PM
  #8  
five7kid's Avatar
Moderator
25 Year Member
iTrader: (14)
 
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
LT1 Pro
- Bolts in the same as a Gen I SBC (mounts, exhaust)

LT1 Con
- Must use a T56 from an LT1 (related only to your T56 remark)
- vs. an LS1, same level of effort to wire in, hook up (cooling, etc.)
Reply
Old Feb 17, 2015 | 06:37 PM
  #9  
PAFORM350's Avatar
Senior Member
20 Year Member
 
Joined: Feb 2003
Posts: 644
Likes: 0
From: Fleming Island, FL
Car: 1992 Formula 350
Engine: 5.7 L98
Transmission: 700R4
Re: Pro vs Cons LS or L98, LT1

Good question. Thinking the same here
Reply
Old Feb 17, 2015 | 07:42 PM
  #10  
Pocket's Avatar
Supreme Member
20 Year Member
iTrader: (24)
 
Joined: Jun 2005
Posts: 8,117
Likes: 361
From: NC
Car: 91 Trans Am
Re: Pro vs Cons LS or L98, LT1

If you can afford a LSx conversion, do a LSx conversion
Reply
Old Feb 18, 2015 | 01:18 PM
  #11  
cypris09's Avatar
Senior Member
iTrader: (1)
 
Joined: Jun 2009
Posts: 564
Likes: 0
From: N.E. Ohio
Car: 87 Gta
Engine: 5.3
Transmission: 4l60e
Axle/Gears: 3.42
Re: Pro vs Cons LS or L98, LT1

Imo go ls, I went with a gen I the first time and I just wasn't happy. As far as the swap goes it's pretty straight forward and more than enough help on the swap board.
Reply
Old Feb 18, 2015 | 02:01 PM
  #12  
RicerEater's Avatar
Thread Starter
Junior Member
iTrader: (2)
 
Joined: Jun 2009
Posts: 89
Likes: 1
From: Charlotte NC
Car: 1992 Chevrolet Camaro Iroc-z
Engine: 305 TBI
Transmission: T5 T56 needs rebuild
Axle/Gears: 2.77 POSI with Disc brakes 9 bolt
Re: Pro vs Cons LS or L98, LT1

I see people really like there LS's
Reply
Old Feb 18, 2015 | 03:58 PM
  #13  
aliceempire's Avatar
Supreme Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (14)
 
Joined: Nov 2008
Posts: 2,093
Likes: 175
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Don't get me wrong, my tpi is great and is an excellent low rpm freeway cruiser. I have zero plans to change that. Plus my LT1 is my all time favorite engine. But my bone stock, weenie cammed 5.3 in my 2wd Sierra will keep up with both. A hot cammed 6.0 would make a fantastic all around thirdgen with little effort.
Reply
Old Feb 18, 2015 | 08:34 PM
  #14  
RicerEater's Avatar
Thread Starter
Junior Member
iTrader: (2)
 
Joined: Jun 2009
Posts: 89
Likes: 1
From: Charlotte NC
Car: 1992 Chevrolet Camaro Iroc-z
Engine: 305 TBI
Transmission: T5 T56 needs rebuild
Axle/Gears: 2.77 POSI with Disc brakes 9 bolt
Re: Pro vs Cons LS or L98, LT1

Ok so been skimming through old forums and such and I see a lot about power this and so forth. And its a DD. What about drive ability I mean weight difference with Iron block and stock K member and aluminum block. I am sure that changes the drivability extremely. So what about things like the noise is it quieter with LS style exhaust? What are some major difference's with handling. Carbed, uncarbed. Any engine can make power and mine will for sure. LSX is just over kill to me. I am not looking for a 8 second car but I would love to get close to it.
Reply
Old Feb 18, 2015 | 09:26 PM
  #15  
Pocket's Avatar
Supreme Member
20 Year Member
iTrader: (24)
 
Joined: Jun 2005
Posts: 8,117
Likes: 361
From: NC
Car: 91 Trans Am
Re: Pro vs Cons LS or L98, LT1

All LSx conversions drastically reduce the front end weight. Ride height will have to be adjusted and the front suspension realigned. Not all LSx conversions are fire-breathing monsters, although they can be

Sound is comparable to SBCs and LT1s with a similar size cam. LSx have a different firing order so the sound is a bit different
Reply
Old Feb 18, 2015 | 09:46 PM
  #16  
aliceempire's Avatar
Supreme Member
15 Year Member
Liked
Loved
Community Favorite
iTrader: (14)
 
Joined: Nov 2008
Posts: 2,093
Likes: 175
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Pro vs Cons LS or L98, LT1



Not exactly sure what your questions are aiming for. You want a daily driver that "will make power". Well, define your interpretation of daily driver...many people will want a streetable everyday driver then want a choppy idle because it sounds cool. OR have manul steering but drive it every day...get my notion?

Block material doesn't change drivability. Yes, aluminum is lighter, just put in correct springs to make up for that. Read some of the LS swaps on the boards and you'll see.

The exhaust noise is dependant on the exhaust you choose. Not the engine. Loud or quiet can be had with all engines.

Differences in handling. LSx will typically be the same or better with an aluminum block. Again. Put in the correct springs for the weight of the car with engine and trans in the car. The swaps that were already done and other members can help advise you on good springs.

If you want drivability, why would you carb a previously fuel injected engine? I see no reason to carb a LS in the first place. Injection is not that hard.

What makes a LS "overkill" to you? You want 300hp? A 5.3 already does that stock. Want 600hp? Add boost. Drivable...yep 600hp, still drivable. Not looking for an 8 second car...good news...you already have two goals.

Now this doesn't mean you "NEED TO GO LSx OR THE ZOMBIES WILL GET YOU!" But it does mean you need to make goals, budget, knowledge on what people have done, what sounds good to you, and the know how if you're going to do the work yourself. If you can't do it and don't have the money to have someone good do it then do not do it. Get busy learning. The More You Know, and Knowledge is Power and all that old Saturday morning commercials stuff.
Reply
Old Feb 18, 2015 | 10:08 PM
  #17  
Thirdgen89GTA's Avatar
Supreme Member
20 Year Member
Liked
iTrader: (5)
 
Joined: Sep 2004
Posts: 5,906
Likes: 240
From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Pro vs Cons LS or L98, LT1

Originally Posted by RicerEater
I see people really like there LS's
In todays world, the LSx based swaps make sense for just about EVERY situation you can think of.

About the only reason not to LSx swap is because you Want that old school motor, or you are heavily invested in performance parts for the old stuff.

The very reason I don't have a LSx in my car instead of the LT1 is that when the LT1 started knocking, I already had a ton of money in parts bought for an upgrade, so it was cheaper to just rebuild the shortblock than to dump the LT1 and go to a LS1, also my T56 isn't cost effective to switch to a LS1 style and its freshly rebuilt too. Also, I refuse to make the jump unless I'm going to an all aluminum engine. Which means LS1,2,3, or one of the 5.3L aluminum variants and that adds a cost over the iron 5.3L variants.

Daily driver? Iron block 5.3L swap. Cheap to find. Run the stock manifolds, buy the swap mounts. Convert the harness. Pickup a 4L60E or 80E. You now have a fairly cheap swap that will produce a solid 80-100hp more than the L98, get better fuel economy and sacrifice zero drivability.

Last edited by Thirdgen89GTA; Feb 18, 2015 at 10:12 PM.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
F.I. 57 Belair
DFI and ECM
8
Aug 23, 2021 01:09 AM
88SS6SPEED
Engine/Drivetrain/Suspension Parts for Sale
7
Nov 11, 2015 07:05 AM
WejaZ28
DFI and ECM
17
Oct 3, 2015 07:38 PM
3.8TransAM
Body
2
Sep 17, 2015 02:16 PM
scotrans am
Electronics
4
Sep 5, 2015 04:26 AM




All times are GMT -5. The time now is 08:29 PM.