LT4 v. LS6

krebs128 · #1 11-15-2003, 04:31 PM

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.

BlkCamaroSS · #2 11-15-2003, 05:35 PM

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...

krebs128 · #3 11-16-2003, 01:16 AM

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?

BlkCamaroSS · #4 11-16-2003, 10:11 AM

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).

will69camaro · #5 11-16-2003, 08:15 PM

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

krebs128 · #6 11-16-2003, 09:40 PM

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...

BlkCamaroSS · #7 11-17-2003, 01:05 AM

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...

Blue02R6 · #8 11-17-2003, 02:55 AM

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

BlkCamaroSS · #9 11-17-2003, 11:35 AM

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

Tekone · #10 11-20-2003, 11:24 AM

Quote:

Originally Posted by BlkCamaroSS

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.

BlkCamaroSS · #11 11-20-2003, 07:36 PM

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

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

DVS LT1 · #12 11-24-2003, 01:05 PM

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.

SONIC1050fps · #13 12-04-2003, 08:29 AM

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

SONIC1050fps · #14 12-04-2003, 08:36 AM

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

krebs128 · #15 12-04-2003, 06:11 PM

Quote:

Originally Posted by DVS LT1

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.

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