LT4 v. LS6

what's better? what's more desired? which is cheaper? is it basically the same comparision between the LT1 and the LS1? where the LT1 is cheaper and cheaper aftermarket, but slightly lower power and the LS1 is more expensive engine and aftermarket but great power in the end. comments and suggestions please.

Yeah, pretty much the same comparison I believe. I sure would like to have an LT4 SS though, only a 100 of those in 97 with the Anniversary stripes, gorgeous...

so though LT4's are less common, the LS6 is better, ok thanx for clearifying. one more thing, i mentioned in a post a while ago about the LT4 conversion from LT1's. does the LS1 have a conversion kit to LS6? if so, where can i get it and how much?

Yeah, it's got a conversion kit, but as far as I know all of the parts are from GM.

LT4's came stock in some Camaros, while LS6's never came stock. Any LS6 you see in any F-body is a conversion, unless they dropped a whole new motor in there (I know of one in STL that has done that, he bought an 02 TA, and immediately dropped in a 405 hp Z06 LS6 motor).

I'm looking for a motor to put in my camaro and i'm leaning towards an LS6 but if i could find one i'd go with a ZR1!!! Of the LT4 and LS6 the LS6 is definitely a better motor.

William

where can i find a LS6 conversion kit or what are the gm part(s) #? what all would i need to make the conversion complete?

what's the ZR1?-a guess would say it's better than the LS6...

I know in the ZR1 Corvettes there were LT4's...

I don't know what all of the part numbers are for an LS6 conversion, I'm not that far along with my car yet to know that. I would say hop on LS1.com, and I'm sure that they'd know. I know the old SLP board had people who knew, but that board is non existant now...

I believe ZR-1's came with LT-5s only. And I'd have to go with the LS-6.

You are correct, this is just for one of the years. The other years had the same LT5 in them...

http://www.mathewscollection.com/Corvette_91_ZR1.htm

Yeah, it's got a conversion kit, but as far as I know all of the parts are from GM.

LT4's came stock in some Camaros, while LS6's never came stock. Any LS6 you see in any F-body is a conversion, unless they dropped a whole new motor in there (I know of one in STL that has done that, he bought an 02 TA, and immediately dropped in a 405 hp Z06 LS6 motor).

I don't remember any Camaro's having an LT4 stock, since 93 with the exception of the 97 LT4 models. The LS6 block was put into some 01-02 f-bodies, instead of the LS1 block. There is a way to tell which one you have, but I'd have to go look it up.

Hmm, you guessed it, some of the 97 SS's had LT4's, hence, I was right. :banghead:

The only way to tell if you got an LS6 block is to check the casting number on the block...

The LT4 engine is essentially a factory "hot rodded" LT1 - its the same block with four bolt mains(vs. two bolt mains), 1.6 roller rockers(vs. 1.5 stamped steel rockers), fast burn heads designed for the reverse flow Gen II small block (quite similar to LT1 heads but with bigger ports & valves), and other minor shit like bigger injectors, knock module, etc...

The LT4 pumped out 330 HP - 30 more HP than the LT1 and almost all due to the heads. But if you take an LT1 and drop in the "hot cam" and LT4 heads you'll have a motor that will pump out 400 HP.

The LS1 and LS6 engines are similarly identical to each other - the block designs are the same(although the LS6 block is made of a stronger aluminum), the intakes are similar design and interchangeable(better flow out of the LS6 manifold), both engines utilize a single coil per cylinder/reverse firing order ignition, and those butt-ugly Gen III heads(I should say the valve covers-look hurting) are the same design(with the LS6 heads flowing more air). The Gen III small blocks come from the factory with 1.7 roller rockers. I believe the LS6's also have a bigger cam.

Like BlackSS mentioned, some 2001+ F-Bodies got LS6 blocks put in them. Take that LS1 engine and bolt on an LS6 intake, put in a bigger cam and port out your stock LS1 heads to LS6 specs and you've basically got an LS6 now. All the shit is interchangeable between engines - just like LT1 & LT4 shit is the same.

Whereas the history of the Gen I small block goes back fifty years and dozens of models, blocks, etc... the Gen II & Gen III small block V8's had a seven and six year run respectively with only two variations in each generation. The LT5 ZR-1 engine from about '89 to '95 was a completely different engine designed for GM by Lotus and utilized double overhead cams.

If you're looking for an engine, forget the LT5 - its so rare and would cost you a fortune because of its historic value. The price of an LS1/LS6 crate engine will kill you - only way to get your hands on one is if you find a junker as said before. If you want a fully assembled crate engine don't bother with an LT1 or LT4, get a fast burn ZZ3 or ZZ4 engine, or even a 502 cid monster. The cheapest rout would be to buy a burned out LT1 engine and rebuild it yourself or with help as a 383 or 396 stroker engine pumping out 500 HP. :smokin:

Manyou guys know crap....the LT5 lotus /gm desgn.. made the mothp for a Murcury built dohc 4 valve.. the Lt1 is a god motor.. thelt4is hot rodded Lt1 from the fatry and only 100 Camaroes had them

now Ls1 and Ls6 all 98 + came with these.. the 01-02 you had a1in 5 chance of reieving the LS6 block..ALL 01-02 recievd LS^ intake manifold/ exhaust manifold. 6.0 liter truck am ad hot programming.. along with some ancilary stuff.
the LS6 is in no way similar to the Lt1/Lt4 it is totally diffeent..and No parts interchange

same goes for the Ls1 the mother of the Ls6.. they are /have interchangable partds.. as i mentioned all 01-02 recievedsuch parts

a High milage Lt1 is the way to go.. and rebuild it.. they have strong bottom ends..and can be built to 7000-800 rwhp

happy hunting.. crate?

please unlesss your a total wimp.. the Lt1 will show the crate motor a lesson. After a proper rebuild and cam head package

Man you guys know crap....the LT5 Lotus /GM design.. made the mothp for a Mercury Marine built dohc 4 valve.. the Lt1 is a good motor.. the lt4 is hot rodded Lt1 from the factory and only 100 Camaroes had them

now Ls1 and Ls6 all 98 + came with.LS1's. the 01-02 you had a"1 in 5" chance of receiving the LS6 block..ALL 01-02 recievd LS6 intake manifold/ exhaust manifold, 6.0 liter truck cam and hot programming.. along with some ancillary stuff.
the LS6 is in no way similar to the Lt1/Lt4 it is totally different..and No parts interchange

same goes for the Ls1 the mother of the Ls6.. they are /have interchangable parts.. as i mentioned all 01-02 recieved such parts

a High milage Lt1 is the way to go.. and rebuild it.. they have strong bottom ends..and can be built to 700-800 rwhp

happy hunting.. crate?

please unlesss your a total wimp.. the Lt1 will show the crate motor a lesson. After a proper rebuild and cam head package

Take that LS1 engine and bolt on an LS6 intake, put in a bigger cam and port out your stock LS1 heads to LS6 specs and you've basically got an LS6 now. All the shit is interchangeable between engines - just like LT1 & LT4 shit is the same.

yea, i looked into this on some other camaro forums and the results fell short of the desired effects. ppl were sayin that by doing the same thing you stated that hp was 15-20-even 25 horses less than the stock LS6's 405hp.

F-bodies did not come with LS6's, ever. The only ones that have them are aftermarket conversions...

Get your facts straight, and learn to spell.

yea, i looked into this on some other camaro forums and the results fell short of the desired effects. ppl were sayin that by doing the same thing you stated that hp was 15-20-even 25 horses less than the stock LS6's 405hp.

My point was that the engines are the same design - although I'm stuck in the reverse flow universe I'm sure there are other advantages that the LS6 has over the LS1 besides a slightly bigger cam, better flowing heads, and the intake that make up the extra 15-25 HP (fuel delivery/timing, PCM programming, etc...). Furthermore, I'd be interested to know if those gains (you spoke of) came from 350 HP rated C5 LS1's or 305-320 HP rated F-Body LS1's. Eh?

And the truth is, I don't see too many people looking to get headwork done to their LS1 castings using LS6 flow bench numbers as a goal.

F bodies DID comewith Ls6 Blocks.. also 01-02 Ls1 had Ls6 intake/ exhaust and the 6.0 liter cam

along with some variable's in programming.. you had a 1 in 5 chance of owning a Ls6 block in 01-02 for an "F "body

and i have proof.. anyone havea fax number

otherwise

CAMARO Performers
Fall 2003 Isue...page 83


Black SS is an idiot.. who know little about his car or anything related.. happy bro

i'm correct yur not

as it will always be.. keepmentally fencing with me ..you'll lose i never open my mouth without making 100% sure i'm correct
but please spelll check for me.. like yu Chevy boys are worth it.. i have yet to lose to any SS and don'tplan on it

though i rape 03 cobra's as well
face it your a jeaous SS owner who dislikes Ws6 owners .. because realy objetively which car is undoubtedly the betterlooking of the 2.. you non functional SS hood or the Ram air hood that actually works.. as i explained in my PM to you

if a variram that corvette uses can guarantee a .35-.4 and 3-4mph gain in the 1/4 or YOUR MONeY BACK you think a sealed Ws6 ram air won't do the same or come real close.. your high

keep spell checking..cause guys want to know about spelling not hp

You should quit trying to call me out. You're making yourself look retarded, flyboy. Wait, you just work on them, not fly them.

As for your PM, I didn't read it all the way, and neither hood is very functional below 100 mph. If you're so unhappy here, leave. But I for one am already tired of you bullshit facts and posting.

Again, your 1 in 5 number is crap.

i saw everyones post and it made me sign in .1st, blkcamaross is right about only 1 thing, 100 97 ss camaros came with lt4s. however u did not have a 1 in 5 chance of getting a ls6 bolck in 2001-2002. in 2001 under 15% of all f bodies had a ls6 block and close to 25% in 2002. the difference in a ls1 and ls6 block is that the ls6 is 10-15% stronger and has bay to bay breathing in the 2,3,4 bulk heads which allow for 500-750 more usable rpm. it also has better oil gallies in the block which would be the reason ls6 blocks dont consume oil the way an ls1 does. there were a few camaros that did come with z06 complete motors(ZL1) in 2002.I believe less than 20 of the 72. I say 72 instead of 69 because gm ,gmmg and fred gibbs wife, the man that originally created the ZL1 have prototypes of the ZL1 which adds 3 to the 69 sold many of which have the LS6 gen 3 427s everyone has herd so much about. The only other thing that 01-02 camaros have in common with the LS6 from the factory in the intake manifold. the cams in the 01-02 camaros were less on power than the 98-00 camaros. By the way my knowledge comes from talking to pros at SLP,MTI and Augostino racing as I am currently building a ls6 for my 00 ss.SONIC1050fps-I like the ws6 just as much as a ss.
1/4-12.97 with mickey thompsons on my stock slp performance edition ss at 112.20

Ok, just one thing to note, 1 in five chance is 20%!

Boy there is a lot of bashing going on here.... You guys are forgetting about the 29 LT4 Firehawks they made in 97, 30 if you count the prototype. And also they made 106 LT4 Camaro SS's in 1997. 110 if you count the 4 prototypes. The 6 un-accounted for went to Canada.

Want proof visit this site.

http://www.lt4.com/ss_registry.htm

http://www.lt4.com/fh_registry.htm

Although I hate the LS1 because I am a die hard LT1 guy, the LS1 is a well-designed engine that has awesome capabilities.


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1996 Camaro SS # 1436 out of 2410
SS Options:
Hurst Short throw shifter
Level II Bilstien Suspension
Performance Exhaust
Torsen Axel
Oil Cooler
SS Car Cover
Z28 SS Floor Mats
Add items:
Hypertech 160 thermostat
Richmond 3.73 gears
1LE Intake elbow
Hypertech Power Programmer

The LT1 and LS1 are both great engines. Which is better is more a question of which is better for you. If your looking for power out of the box, then the LS1 could be considered better. In a vette, the LT1 made 300 hp. The LS1 made 345 in older vettes, and makes 350 in the later C5's. (Ive heard that the 5 hp increase is due to new LS1's being equiped with LS6 intake manifolds.) As for performance upgrades, the LS1 and LT1 both have their fair share. Its just a little less obvious for the LT1. For example, any LS1 parts will be labeled as such. LT1 parts usually wont, because most of this engine families parts (GEN II or 2nd GEN) are interchangeable with 1st GEN small block parts. If you want a new crank for an LT1, it might not be labeled as an LT1 crank, but as a 1 piece rear main seal, small block chevy crankshaft. The same goes for pistons and connecting rods. Old school 350 (first generation) pistons and rods can be used in the LT1. In reality, the LT1 is very similar to the classic small block, so it uses many of its reciprocating assembly parts. This means ultra high quality parts at ultra low prices for LT1 owners. Thats not to say that LS1 owners dont have the same high quality parts selection. In fact all third generation (LS1/LS6) parts are only of the highest quality. The down side though, is that you had better be ready to pay for those parts. LS1 parts can quickly kill a savings account,something to definately consider. Aftermarket cylinder heads are available for LT1's but, as far as I know arent available for LS1 engines. Keep in mind that factory LS1 heads do flow very well, and a lot of companies offer ported versions of factory third gen castings. Although no aftermarket heads are available for LS1's, a few companies have new intake manifolds for this motor. This isnt the case for LT1's though. As far as I know, no one makes an intake manifold for the LT1. LT4 intakes are for sale new, but wont work well with LT1 heads due to mismatched port alignment because of the raised runners in the LT4 engine. Lots of companies makes nitrous and supercharger kits for both engines, so theres no discrimination here. As far as size and weight, the LS1 has slightly smaller physical dimensions, and doesnt weigh as much as the LT1. Both engines have roller camshafts.All LS1 blocks are aluminium with sleeved bores. All LT1 blocks are iron.LT1 blocks are rumored to be stronger, but by no means is an LS1 block weak. Like most aluminium blocks, the LS1 block has only one life, and when its time to rebuild, it time to find a new block.Used LS1's can be found pretty easily, and this is a state of the art push rod V-8, but LT1's are very cheap used, and can be built with premium parts at a not so premium price tag. Both engines have serious performance potential, and you cant go wrong with either one. It just boils down to which chevy small block works for you.

I've got that same camaro mag BLK, some of the LS1 camaros had LS6 blocks, but that doesn't make it an LS6. As far as I can tell the only difference in the LS1 and LS6 block is the material and a few lightening holes in the LS6 block.

F-bodies did not come with LS6's, ever. The only ones that have them are aftermarket conversions...

Get your facts straight, and learn to spell.

You must not now crap about camaros homeboy.
First of all, the LS1 and LS6 engines are both similar. There are notable differences in the two.
The first thing to be noticed in the LS6 is that it doesn't have an EGR valve as the LS1.
The next thing noticable is that the LS6's intake runners are a little bit more raised than those of the LS1.
The heads and cam are also slight different than that of the LS1.
Second of all, the LS6 did in fact come in F-bodies. LS1 are on all 1998-2002 z's. All 2001-2002 camaro ss come with the LS6.
LT4 vs. LS6, you just can't beat the LS6. True the LT's are much more cheaper to put power, but the fact is that the LS6 are already a making high 12s at the track and its stock. Just put on the hot cam, underdrive pulleys, and a little computer tuning and an LS6 will be at mid to low 12's. LT4's do pack power, but to say that they're better than LS6, NEVER.

2002 Camaro SS 35th anniversary
automatic 410 custom LS6 with supercharger making 35lbs of boost
1700 HP@6500 RPM
1/4 mile-7.95 sec at 190 mph

1996 Camaro Z28
automatic 396 Blown LT1 with 15lb boost and 175hp wet shot system
895HP@6200RPM
1/4 mile-9.8 sec at 145 mph

ummm????? ok?

Second of all, the LS6 did in fact come in F-bodies. LS1 are on all 1998-2002 z's. All 2001-2002 camaro ss come with the LS6.


No Camaro EVER came from GM or from SLP with an LS6. Some did have the LS6 block, which made for a 0% power increase. The only Camaros to ever 'come new' with an LS6 were from aftermarket coversion companies such as GMMG.

are you planning on leaving them stock or upgrading em?

this shit is so old

ditto