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Discussion Starter #1
well ive been thinking in terms of making maximum power with least amount of money to be invested .. and we all know modulars (although i love them) are costly to produce n/a power, im toyin with the idea of doing an ls1/t56 swap (here comes the hate :eek:) but just think about how easy it would be to make over 400 rwhp with nothing more than the usual headers, full exhaust, cam and intake manifold. Another plus is the huge mn12 engine bay with the small dimensional measurements of the ls1 which would leave enough room for me to smugle mexicans lol jk, it would b a breeze to work on. Now im not afraid of custom work as im very capable of doing anythign, as matter of fact i prefer custom as it is easier for me. what would you guys think of such a project? any obstacles that may make it impossible? i can make all mounts of modify wat i can get, and i have a driveshaft shop near me for when that comes up, only thing that worries me is wiring, or go the carb route.
 

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Though the LS-1 is a monster of a motor,It is not exacly a good bang for the buck to swap into a Tbird.You talk about cost to modify a Modular motor???The cost it would take to swap an LS-1 in an MN12 would exceed that to modify a Modular.

Cost for cost when it is all said and done you will make more power with the modular than just swaping a stock LS-1 motor.

Hell I can roll run LS-1's all day long with my modular and keep up if not nose on them.But I can't touch them off the line.Now with a 3500ish stall I would be in LS-1 territory.

Here are your choice's

Build your modular

PI swap

DOHC swap

Terminator swap

Thats my advice.Take it or leave it.
 

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i'd do a 351 windsor swap if i wanted pushrods
Didn't think of that one.

95badbird swaped a 351Cleveland(I think) in his bird and it runs low 14's maybe even high 13's.And thats with an open diff on a stock truck motor.
 

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Refrigerator Raider Hater
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The best bang for the buck would be to find a really nice 91-93 5L bird, and swap in a worked over 351, as there would be minimal mods needed. There are a handful of people on the board who have done just that.
 

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99 Cobra engine with a Vortech at 6 psi. Over 400 RWHP at the wheels for 5 grand for a used DOHC and S trim through stock manifolds and cams. Figuring out how to get a LS1 to run and fit in a MN-12 will be difficult and likely cost more than that anyhow. It would definitely score cool points and high marks for innovation, but what's not pimp about a DOHC with a blower?

Pete
 

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I'd like to see it done :leftright
 

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Would it be cool? Yes.
Is it possible? Yes.
Is it a good bang for the buck swap into a tbird? Not at all.

If you want bang for the buck, a 351 is the way to go. I have a grand total of about $6K into my 393 car, including completely rebuilding the motor, 5-speed swap, rear disc swap, aluminum driveshaft, chip, and a bunch of other misc. stuff. That thing is completely insane. I just got the thing running, so I still have to do some stuff on it, and get it to a dyno and a track, but I can safely say it will stomp stock LS1 f-bodies, and for $6K, I don't think there is much to be had that is faster.
 

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Discussion Starter #11
haha well i'm not a chevy guy myself but i do have much respect for the ls1. the main reason for using an ls1 motor is b/c thay respond to the slightest mods, theyre soo hungry for more air in n/a trim. But as we all probably know,the most important key factor in producing maximun power from these motors.... requires a mullet hahaha ;) lol
BUt realistically, i have loooked around locally and they go for around 1200 dollars, which isnt bad at all with the ecu.i'm not sure on a trans tho. i have a 460 BB laying in my bard off a late 70's pickup complete with accesories , i scored it for free , would that be a more cost effective swap? ive heard depending on what years the heads are either good or complete crap is that true? and what trans would handle a built 460
 

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PostSlut
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haha well i'm not a chevy guy myself but i do have much respect for the ls1. the main reason for using an ls1 motor is b/c thay respond to the slightest mods, theyre soo hungry for more air in n/a trim. But as we all probably know,the most important key factor in producing maximun power from these motors.... requires a mullet hahaha ;) lol
BUt realistically, i have loooked around locally and they go for around 1200 dollars, which isnt bad at all with the ecu.i'm not sure on a trans tho. i have a 460 BB laying in my bard off a late 70's pickup complete with accesories , i scored it for free , would that be a more cost effective swap? ive heard depending on what years the heads are either good or complete crap is that true? and what trans would handle a built 460
Run a C6 behind the 460.

I run a C6 behind my 351W.....but will be going to a C4 sometime soon.
 

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Discussion Starter #13
What's the reason for switching to the c4? Is the gearing more favorable?


Run a C6 behind the 460.

I run a C6 behind my 351W.....but will be going to a C4 sometime soon.
 

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A 350 chevy and a 700R4 tranny is a great combo. The 1st gear on the 700R4 is a 3.06 and that is made for a heavy car like ours. My setup in a Mazda pickup even passed MA emissions and that is with a carb and no cats and hell not even a pcv valve LOL
 

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PostSlut
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What's the reason for switching to the c4? Is the gearing more favorable?
the gearing in both the C4 and C6 are as follows:

C4 1st 2.46-1, 2nd 1.46-1, 3rd 1-1
C6 1st 2.46-1, 2nd 1.46-1, 3rd 1-1

they are the same, but here is the weight difference....
C4 80lbs.
C6 205lbs. dry

The C4 will have less rotational mass as well.
 

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smoothed and filled red pearl 94
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what he said

Sacrilege
yeah, absolute sacrilege. i wouldn't even use a gm paint let alone gm engine in a ford just cause theyre competitors. thats like if the us olympic team had someone from germany on it... both awesome countries, but they dont belong together. prolly an f'in blast to drive though.
 

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I have GM HEI distributor in my 351W. Not bein a traitor, but id like to see an LS1 in a MN-12, hell even an LS6, no matter who you are, ya gotta admit these motors make a he** of a lot of power w/ pushrods and natural aspiration. Hate me all you want, but i have respect for all manufacturers. I love my cougar though. :)
 

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i gotta built ls6 motor with a direct port nx n2o kit, th400 trans, and ford 9 inch rear with 4.10's sitting in my garage if you wanna buy it off of me ;). made a couple bucks over 650 on a mustang dyno.

i contemplated doing this swap myself, and actuallyt he ls1 will fit without any major modifications tot he motor or the car itself. The pcm (engine computer) would be the hardest thing to place and splice all the wires where they need to go, but other than that, a ls1 will fit. biggest problem i came up with in my measurements was how to fit a large set of kooks long tubes in with the black :).

i never understood this gm vs ford v8 thing. If its an american v8 is alright by me :) anythings better than the agonizing sound of a fart cannon doing the import fashioned "fly by"
 

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yeah, absolute sacrilege. i wouldn't even use a gm paint let alone gm engine in a ford just cause they're competitors. thats like if the us Olympic team had someone from Germany on it... both awesome countries, but they don't belong together. prolly an f'in blast to drive though.
Yep it's sacrilege, the MN12's not worthy of such a powerful GM motor. Or at least Ford never thought it was! :D ;)

re the Olympics... it's not unheard of for an athlete to represent multiple countries during the course of their olympic career. People immigrate and represent their new country, or hold multiple citizenships and choose who they'll compete for. Of course they can only represent one country at a time and there are restrictions on amount of time that must elapse between countries etc, but then there are waivers for that too.
 
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