anybody know the measurement on the ls7. i would like to put one in my 91 firebird. It needs to fit with twin turbos and an ac unit. also would i need to change the cam to handle the boost???

 

It is about the same size as any other gen III or IV motor. Although instinct tells me that you won't be putting together this $15k set-up.

 

why do you say i wont be puttting this set up together. that is rather presumptious of you. also if know are the mounts the same as the ls1. and would the stock cam work. any helpful info would be greatly appreciated.

 

Same outside dimention as a LS1. It may be more than you chewed off to do. If you are mechanical minded then you got half. If you understand wires and harnesses then you got the other half.

 

thank you i am mechanical minded. there is a company that specializes in wireing so i will probably have them do the wireing. at least then i will get some sort of warranty on that. hopefully spohn will come up with there tubeular k member with ls mounts so it may just bolt up to that.

 

It may be and I hope I am wrong. This is not your every day set-up that a 22 year old kid takes on financialy. Usually someone who has the money for a set-up like this has already done their research and or will pay to have someone build it for them. Do you know how expensive your fantasy is going to cost? You are talking about a set-up that should make over 1000 hp and cost $25k+ to complete. You need to take some time and research up on what it takes to swap in an LS1 and what it takes to prep a car for huge power numbers. There is more to it than just an engine. Your goals are so high right now you need to come down to reality a bit and learn from the basics. Picking a blower cam should be the last thing on your list right now.

 

i may be a 23 year old kid. but i have a rather profitable concrete company that i have ran since i was 19. granted i only operate on the weekends because i am a laborer in the local laborers union. i feel that i will be able to build this setup granted it may take me a year or 2 to complete. i think it would be a wise investment because i would not need to upgrade for quite a few years. it will already be top of the line and create enough power to be competitive for quite a few years. so instead of building multipul motors and doing extensive upgrades to make each produce more power. i will build one motor and blow away the comp. therefor bypassing alot of expence to not have what i really want.

 

also other than the obvious sfc's and welding the body what could i do to prep the car its t-top and i like that so i would rather not put in a roll cage because of the barrs that would go across the area where the window meets the t-top

any help is usefull and btw this is the start of my research

 

I wish you luck. You could always turbo another engine that costs less and have the same amount of power. There are many ways of getting the power that you are looking for. You may have to have a cage when you are all said and done. Even a built T56 won't last behind the kind of power you will be making. You may wat to start with the motor first and then worry about power adders later. To put this into perspective, there is a twin turbo 346 LS1 in our local club. The guy runs high 9's at 146mph in the 1/4. The car is so fast it has to be set up as a drag car. He has two speed powerglide, moser rear, and a 12 point cage. It is still street legal but worthless on anything other than all out drag slicks and a striaght road ahed of it. Your set-up could make 300hp more than this.

 

thanks for the insite maby there is some way to cover the cage so it will look good. i am hopeing to mod the front end so that it would be useable on the street. i have no intrest in drag. i just like really fast street cars. i would love to run against my buddys 96 viper rt 10 and make it look like a shadow. any trannie other than a 2 speed that might hold up to the power. also what gears is your friend running

 

it would be pointless to make a big power engine and run a stock cam. also, it would be foolish and dangerous to run w/o a roll cage and if you are planning on competing (legally) you will need a roll cage to run anyhows

 

You shouldn't have any problems with a viper even if you leave the LS7 stock. You are talking about an 11 second car right there. A T56 could live behind that motor and you could get away with a 6 point cage. A 6 point cage is pretty hidden and doesn't make your car look like a nascar. Having an LS7 would increase the cool factor of your car higher than anything on the road. Howeve, there are much more economical ways of getting 500+ hp. It is hard to say seeing how the GM crate price on the LS7 has not been released yet. My geuss is that it is around $12K.

 

thanks for all the usefull info like i said before i have no intrest in competeing. i just want to have the fastest car in town and hopefully pick up a couple best in shows on the way also i like it because not many people will do it even after this post like you said there maby more economical ways but they dont get you the oooohhhh's aaaaaaahhh's and wows like the ls7 will

 

Its a little hard to be talking about putting a motor into your car that isn't even in production yet. If the LS7 ever does turn into a production crate motor, it will be VERY expensive. I doubt it will be a crate motor though because it has ALOT of computer stuff on it. I've yet to even hear about someone doing an LS2 swap. Theres just too many electronics to get straight. Do you even know anything about the fly by wire throttle, torque management ar anything else GM has hidden in the computers of the Corvette and GTO? I predict it will be a few years before LS2 swaps become popular, and many more before the LS7. Yes, its a cool idea, but no, it ain't gonna happen.

And if your not racing at a track, don't you think its a little stupid to have a 1000 HP motor on the street? If you want power and ohh's and ahh's when you pop your hood, do a head and cam swap on your TPI and slap a supercharger on it.

Just my after reading this post for a while.

 

LS2 swaps are starting to pop and up and a few companies already have modules to bypass the toque managment. They also have a kit to use the wire less throttle. All of the other electronics are the same as any other gen III multi port swap. GM has released that it will be a crate motor. I bet the the crate motor will not have the torque management. I don't even think the LS7 has it to begin with. Only the LS2.

 

throw a 427 tt in the bitch and ull hit 1000 hp... no reason for it to be ls7.... but if ur doing it to be the first to do it, then i wish u luck, i never doubt an intellegent mind.... please keep us updated with reports on your progress, and some pics...

 

what would happen is to use the computers of of the corvett to eliminate any reprograming. i'm sure that gm will make this a crate motor they would be stupid not to. also i do not feel that the power would be stupid on the street. it may not be what everyone wants but to call another persons goals stupid is fairly rude. also to say it cant happen is outragious not many years ago lots of things we take for granted where said to be inpossabe or they wern't going to happen. but look at where we are with technology today

 

be sure to send me pictures when you get it in

 

as i said before it will be a couple year project but if you are still on the boards when it is done i am sure you will hear about it and see the pics

 

I thought this topic while being something that i am serious about doing would still bring more conversation/help.

if nothing else some other cool ideas to go with a ls7 swap.

I am intrested in any help/ideas/comments abouth the project i will be undertaking.

the only thing i am not intrested in is usless critisim and put downs at my idea

 

LS1 and twin turbo is already to much to handle, why do you want more for a lot more?

 

its not about too much 2 handle its about haveing something all others will look up to and admire while still being able to ride around in it

 

It's not that people are being rude, but look at what it is you're talking about. Will the LS7 fit? Why not ask what color to paint the intake while you're at it?

A new member coming here and asking about installing a LS7 TT. Look at it from our point of view.

...but good luck.

 

i don't understand what exactly you are trying to say

do you feel that my question was stupid in some way
because i was always under the impresion that the only stupid question was the one that was not asked


i am trying to learn about an engine that i would like to put in my car and if i am not wrong that is what this site is for

but if i am wrong i will find another site that is used for a purpose that better suites my needs

 

I know how you feel, but you have to realize that the LS7 hasn't even been produced yet?
Do you realize how EXPENSIVE that motor is going to be? People are speculating that it'll cost over $9000 for the motor alone. Then you gotta do all the stuff to support LS1 in a thirdgen (about $1000+ in swap parts alone)

From our point of view, we see a person who wants to learn about this stuff, but you don't just start out w/ a 427 CI LS7.

I myself was thinking of swapping an LS1 into my car, but then I realized, it wasn't practical. But this may not be your situation.

 

i am building a show car/weekend driver. I guess i dont see what you see. I think on the concept of if you cant juggle running chain saws then why juggle at all. I always do things on a big scale its the way I think and work. I do not see the point in wasteing money on the type of car I want and to have what everyone else has. But back to the reason i posted this thread does any one have any legitimit ideas that could help or pertain to my project??? I am particularly intrested in how to make the car handle this kind or power

 

how about this

http://www.gmpartsdirect.com/results...umber=12499750

 

as was said before it probably has more electrical than the ls7

 

If you had bothered to read my whole post, you would have seen that I called the "idea" cool. The "stupid" part is have a 23 year old talk about putting a 1000hp motor in a car to go street racing. Thats just stupid, plain and simple. If you can't read an entire post, how you gonna do an engine swap that has never been done before?

Why don't you put this on an LS1 board and let us know how much they roast you.

http://www.rasr.info/

 

http://forums.corvetteforum.com/show....php?t=1044752

Here is a link to the release info on the LS7. The cost "will sell for well below the cost of comparable custom-built aftermarket engines." lingenfelter gets $13000 for a resleeved LS1 and it does not have many of the features of the LS7 (dry sump, titanium rods, ect) I bet the price will be over $15000

 

thanks that was very helpful

 

Yes, you probably will want to change the cam to limit overlap and increase exhaust duration and/or lift.

As far as handling the power:

Rollcage (must), full tubular frame, 'glide or TH400, narrowed 9in, tubbed rear, coilovers, 4-link, big slicks, wheelie bars, parachute, etc.

Maybe copy something like this for a rear suspension?
http://www.racingjunk.com/ui/8/1/937-1111291626881.jpg

If it matters, the car above has ~1100hp, the owner said it cost $85K to build.

If you do not find this appealing, dont expect to win any street races putting 850+hp to anything but a full race suspension and tires.

Any ideas what kind of turbos you want to run?

Anyway, good luck with your project.

 

Here's a thread on LS1Tech that might help you
http://www.ls1tech.com/forums/showthread.php?t=294052

 

I want to see what a '91 Firebird looks like before, during, and after this swap 'Jojo22'.

Please promise that when you do this, you'll take pics the whole way. One of the first ones can be the arrival of a 15K motor in a crate.

 

Couldn't have said it better myself. You have to understand that maintaining and tuning even a moderatly fast thirdgen is a complete financial drain on a young person like myself. There are a few guys on this board with some really top end engine setups, but they are usually over 40 and own a reputable performance shop. And it's always a forum newbie who comes up with these $100k ideas (and I do beleive it will cost this much all said and done). If you had any common sense you would save up and buy a ferrari with what you would spend on this project, but then again you probably don't have the money. Why don't you start with about 350 ponies and then realize what it takes to put decent power to the ground, and realize that you probably don't want a 1000 horse monster between your fenders for a streetcar.

 

 

im pretty pretty sure my motor will be done b4 ur jojo. im shooting for a modest 400 horses and i have no idea how im gunna keep the tires to the ground. w/o an lsd and a 700R4 trans.. ill be lucky to be able to dirve straight

 

Looks like you'll need to do something with the compression ratio if you are going to have boost.

 

You're asking about reinventing the wheel here.

You'll have to replace EVERYTHING that is stock aside from the exterior body, and you can probably keep the interior as well.

You'll need new just about everything. I understand that you want the "ooh and ahhh" factor. But imagine this -- you spend 85k on your car, get into an accident when an old lady falls asleep at the wheel, your front end is totalled, your engine is all aluminum... blam, cracked block and heads, all of your engine except MAYBE the valve springs are toast...

how "worth it" was it now?

If you want your car to be streetable, then you have to be able to visualize this happening. Now, if you built a regular SBC to handle this kind of power (done time and again) then you will have JUST as much "ooh and ahh" factor, you just wont be able to call it an LS7.

If all that you want is to tell people that you have a " 'vette engine" then you might want to go back to the books. The only people you'll be impressing by saying/doing that is those who dont know anything about motors. And if those are the type of people who you are trying to impress, then you could go with a 350, ilumpy cam, paint it silver and tell them it's a LS7, and giggle as you point at the LT1 intake because they dont know the difference!

For 15k for the motor, you could build a MUCH beefier Gen 1 SBC. You're paying WAY too much for aluminum! Sure, it's lighter, but it's just a hype and something of a trend... and you know how trends go out.

And on that note... you say that you want it so that you wont have to upgrade your motor to be better later by getting top of the line now. Well guess what, there will always be better technology in motors. Yes you'll have top of the line for about 5 years if you do this... but then there will be something else out there that's bigger and better, probably put out just as much ponies, but much more streetable.

If I was you, I'd twin turbo that 305 that was just released by GM, that has DOD (Displacement On Demand). Then you could have a streetable, twin turbo application.

You would STILL need to beef up just about everything, and swap MANY things. You would have almost as much of a headache. But you wont be breaking things as often, and you can go in more than just a straight line then.



Really, if you are dead set on a LS7 setup. Go buy a Corvette. You'll end up saving money this way, and you get the sexier body style. I love a 3rd gen as much as the next guy here, but between a '91 bird, and a '06 Corvette, and you better bet I'll be choosing the 'vette!

The reason that this swap hasnt been thought up by the richer 40 year olds, is because they all know better. I understand that you want to be different, and the fastest out there though... but you can find a more practical way to do it.


Best of luck if you do decide to endevor in this though.

 

sellmanb of all the people that have tried to tell me not to do this build i think that you have put it more politely than any

i think that i may still do the buildup but ditch the tt. at that point the car will be much more streetable

but that also depends on the actiual motor when it comes out
the car is almost a shell as it is (by my doings)

that means when i have it rewiren i would be able to put the vette computer system in which should make things a little easier

 

ditching the TT setup was a very wise choice. Dont worry, you'll still be the smokin'-est cat in the block

 

thanks

btw old ladies falling asleep at the wheel is why they created full coverage ins.

 

never been in an accident where it totals the car before, eh? Insurance companies dont particularly enjoy giving money out... espescially to modified cars for their modified equipment.

 

if you have an appraisal for the car they have to

you can get an apprasial for about $150
look in the yellow pages

 

Actually, even AFTER the car is damaged, if you can PROVE its value, they have to pay. But you're right, an appriasal is the way to go. Bluebook has my car around $4000. My inusrance agent told me that when I expected to get more than $10,000 for an accident, then I should get an appraisal.

There are 1001 reasons to NOT do an LS7 install. If you understand ALL these reasons and you STILL want to do it, then I say good luck!

 

Watch the ins. stuff. Don't ever call them up and tell them you have a bunch of mods. They may flat out cancel you. I've been in the ins. industry for 11 years. If you total your car bring it up then.

Full coverage is NOT the reason why policies for full coverage was created or it would only be availble to old ladies.

Do you have a tired old lady ryder? That could have multiple meanings......

 

i said it was created because of old ladies not for them

 

Not true, use the search button and look up just about anything posted by Therckid.

 

i'll have to do that

 

Now THAT is funny.

You have to have been here awhile to appreciate that one.