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Danno74Z

Calling All LT1 Conversions

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I was curious on how many HybridZ Members put the LT1 engine into their Z's. Any LT1 vintage. Please include all upgrades/modifications if any to the engine and horsepower ratings if known. 1/4 mile times if known really anything you want to mention. If you have pictures in an album please mention that too. This should be fun!

 

Just looking at LT1 GenII conversions only - You LS1 guys start your own Thread :)

 

THANKS!!!!!

Danno74Z

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I'm putting an LT1/T-56 into my 280zx. I've got the electric water pump (CSR , I think), 1.6 rr, and a CC304 cam, Isky springs, complete once over by a machine shop which bored it out .030 over (so it's a 355 now), cloyes double roller timming chain, and fel-pro rebuild kit. I can gladly say that I took it all apart, drove it over to the machine shop (Thanks Ed Hale!:hail:) in my datsun, drove it back when it was done, and then put it back together. And I also had help from my roommate, Vince, he's a good friend. The T-56 got a rebuild also, and I had the shop put in all the little upgrades for the tranny. So I really have no idea what the horsepower/torque rating is, but I've heard 10-15 hp for the electric water pump, and with everything else I'm hoping to be close to 300.:burnout: And hopfully, I can get it all smog legal. I'm going to be happy with that, but for the hell of it, I'm going to install some laughing gas.:icon54: Mainly for the fact that I can say that I did it, plus the looks. Not I'm just waiting to get my motorcycle, and '48 chevy running good, then I'll start with the datsun. It's the GL model, so I believe it has the r200. And I'm going to install a hidden audio set-up, because so a$$ broke into my datsun and took the faceplate and remote from my stereo. Plus the armrest I got from Motorsport Auto. Those bastards! But they did use a slim jim, so I didn't have to replace a window. Well thats a for now.

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I also have an LT1 in my 1980 280ZX. Here's what I have done to my LT1...

*Holley 58mm Throttle body

*Port & Polish of Heads andIntake(Flow#'s)

*36 LBS. Bosch Fuel Injectors

*Custom Cold Air Intake System

*LT4 "Hot Cam" Kit

*SPEC STAGE 3

*Computer Tuning with Tuner Cat & LM-1

*Keith Black (KB) Hyper. Pistons with 10.9:1 CR

*Custom made 1 5/8" headers(built by me)

*Com Cams Chromolly Push Rods

*Crane Hydraulic Roller Lifters

*SFI Approved Dampener

*CSI Electric Water Pump

*Cloyes Double Roller Timing Chain Set

*Melling High Volume Oil Pump

*HUGE K&N Air Filter!

*MSD 6AL with Blaster 2 Coil Pack

*MSD Fuel pump and Mallory Fuel Filter

 

My T56 is also rebuilt with new bearings, syncros , billet syncro keys, steel 3-4 shift fork.

 

I am hoping for 350RWHP with the small cam and hoping to see very low 12's in the 1/4 mile. I will probably swap cams out if I don't see the numbers I want to see.

 

Guy

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My LT1 is from a 1995 Caprice 9C1 cop car.

Here are the details:

Iron heads

Hedman Tight Tube headers

3 1/2" MAF from Camaro

CAI with KN Filter

LT4 Hot Cam

New timing set

High rev valve springs from Combination Motor Sports

Custom PCM tune

Mated to WC T5

2001 Camaro fuel tank with stock pump

Estimate 300HP at flywheel but no dyno numbers or 1/4 mile times

 

Wheelman

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I have just stated my LT1 project. My car is a '77 280Z that had an old carbureted 350 with a truck 5 speed in it. Fun but it needed upgraded badly.

The 94 Z28 LT1 is stock for now with a little computer tweaking, removing the EGR.

I will be running a 4L60E transmission.

My plan is to use my donor car' fuel tank and fuel pump, the z28 gauge cluster and complete engine and body wiring harness. I was shocked by the amount of wiring in a modern-day car compared to a '77 ear car. I have deleted as much wiring as I'm keeping, hope I have taken anything critical out, LOL.

I still have a long way to go but its been fun so far, tiring for sure but fun.

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My LT1 came from my 96 Z28 (which is back to sort of stock). It is a 385 stroker motor, only 10.4 compression, ported stock heads, 58mm TB, 1.6 RR, ported intake, custom tune (Lt1-edit), cold air intake, GM 847 cam, and long tube headers.

T56 transmission, McLeod street twin clutch, R230 and Ross' billet stub axles.

The numbers are in my sig as well as a video of it at the track.

 

Now the motor is under the knife. I am installing some raised runner Trick Flow heads, a welded and ported LT4 intake and a much bigger cam. It should be fun :-)

 

Jody

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I'll throw mine in to the ring. My car is #1792. I got it from a little divorced lady and the car had just around 80K miles and was totally stock. I'm sure that there is some special dungeon reserved for me for corrupting :) a completely stock down to the D hubcaps Z, but oh well.

 

Anyways....my LT1/T56 came from a '94/95 SLP Firehawk with approx. 34K miles on it. Motor has been opened at some point, and was clean enough to eat off of. Who knows what is inside. I haven't had alot of money for performance adders, so mine is basically stock, with the exception of Barts old cold air setup, headers and 3" stainless mandrel exhaust. I tried to put money in to a really solid base, so most of my parts are higher end and should last me for a long time. Stainless braided fuel lines, Aeromotive fuel system (pump and FPR), B&M oil cooler, nismo LSD and a few other secrets.

 

Mine is also going to be a daily driver, so strength and dependability were crucial.

 

I'll try to get pics of my exhaust and redone fuel tank a little later this evening.

 

Bryan

Dat240zg

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Minus the emission equipment, I got a bone stock 94 Pontiac TransAm LT1 in my 81 280ZX. Engine probably has 110K on it. It's my daily driver and I've put over 10K miles since the conversion. Car has the following:

 

* Stock suspension

* R230 differential

* 4L60e tranny

* Dual 2.5" going into a single 3" exhaust and a 40 series Flowmaster by the gas tank.

* Don't laugh but I got a stock manifold on the driver side and a block hugger header on the passenger side. Clearance issues. Haven't had a problem yet.

* MSD fuel pump. Fairly loud by the way.

 

1/4 mile: 13.10 @ 106

 

Pics in my album. It's a fun little sleeper :)

 

 

Sean

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Jody:

 

Just saw your post. What's your impression of the McLeod clutch? Is your flywheel stock?

 

BTW, thanks for the PM about the heads. If I can raise some funds, I'll get back with you.

 

Bryan

 

 

The street twin requires a larger master cyl and you have to run the McLeod flywheel, it's a package deal. You can get a steel flywheel or an aluminum one. The aluminum flywheel is more expensive. I tried a bunch of clutches and none of them could hold the abuse until I got the McLeod. Either way, it's over 1K.

 

Jody

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I'm restoring a 78, Lets see, It’s a 95 LT1 from a Z28 with a T56.

I removed the oil cooler, routed the air intake to the front of the radiator, Removed the EGR valve, hugger headers, mounted the PCM under the dash, relocated the A/C compressor, sand blasted and repainted. Its in and running, Still needs some adjusting, I have the tuner cat software program..

As for the body, New gauges, fuel pump, dash cap, steering wheel, larger sway bars, urethane bushings, Brake overhaul, New head liner, carpet, floor mats, tons of sound deading mats, new door window etc rubber kit, Springs and struts.

Need to finish the bodywork and paint... Than I will tweak the motor and move forward with a head and cam upgrade, maybe some nitrous just because...

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Thanks to all the folks who have responded! Hopefully others will list their LT1 projects. This is pretty cool!

 

So Far We Have:

 

rontyler

VRJoe

love-my-V8-280Z

jbc3

Top Fuel ZX

dat240zg

deja - YOU

wheelman

Bartman

Danno74Z - ME

80LT1

Z-8

 

Danno74Z

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Mine is from a 93 TA. and lt-1. Speed density no mass air. 383 now with head and cam package, heads ported and polished, hooker block huggers, alot of other stuff I've forgotten. Dynoed at 425 rwhp and similar torque. I beat the crap out of it at the track. Still can't keep up with jt-1!

 

I'm on the third clutch since the engine rebuild. If I fry this one, I'm going to go with a tilton tripple disc. It won't be street friendly but it won't slip either.

 

Pics here. http://album.hybridz.org/showgallery.php?cat=500&ppuser=10667

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Mine is from a 96 Z28 and the mods are going to depend a bit on the budget but it won't be stock. I'm building the car from the ground up with a full rotisserie restoration thrown in for good measure along with the swap. At the rate at which I actually work on it I'm going to give Pete Paraska a run for his money for overall duration.:banghead:

 

It has been in storage since October but the renovations to the garage are almost complete so it should make it to the new house soon. At least that's my story and I'm sticking to it.:D

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in that case, i have one too.

 

75 280z no rust!!!

94 caprice lt1

no emissions ofcorse

no a/c no p./s

lt4 hot cam, 1.6 rr, lt4 springs

block hugger headers

pcm programed by pcm america

t56 6sp

tilton 7/8 master cylinder

cold air intake

r200 3.90 gears

ron tyler diff mount

walbro 255lph fuel pump

 

hoping 330hp and high 11s on drags..car should only weigh no more than 2500lbs since i striped out everything not necessary, i mean everything! ....built so i can drive still drive it daily and be reliable. still work in progress...

lt1_front_angle_view.JPG

 

lt1_swap_1_6rr_front_angle.JPG

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Project Started last weekend, Still haven't decided on the 95 LT1 motor or the 383 old school stroker motor, Trans is going to be the 95 T56. Maybe if the cost to adapt the stroker is not too much I will try that first and then try the LT1 after. From what I have read so far I will have less wiring to deal with on the strroker motor and can then wire for the LTI after where it would be tougher to wire for the LT1 first and then take it all out for the stroker. does this make sense? Some day it will probably be an LT1 stroker!

Greg

 

OH, Pictures are in my gallery album.

The two donor cars are Firebirds, an 88 Trans Am with the 383 Stroker and 700R4 trans, and a 95 Formula LT1/T56 with unknown mods, fast as hell, I can see headers and a complete Borla exhaust system underneath.

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Greg,

 

Wiring the 383 would be much easier no doubt. Just follow the JTR book and you can't go wrong. I just don't have the time to do my own harness (LT1) so I sent it away to jeff at PCMamerica.com and should be getting it back next week. The T56 that you are going to use on the 383 might be a different story. I believe you need a special bellhousing to mate it up to the 383 block as the input shaft on the t56 is different from the T5. It is not just a bolt on. Production VS aftermarket T56

 

Danno74Z

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Danno,

Yeah I did some searching and bookmarked a lot of the discussions about this on HybridZ a few months back and I need to go back and read them all again but the impression left in my mind goes as follows:

 

93-97 T56 from the LT1 will blt directly up to any 1986 SBC or later one piece rear seal block, just use an LT1 flywheel

98-2002 from an LS1 will not go , the input shaft is longer, a kit from Weir products and others is available or use a LT1 bellhousing and a spacer.

Where I am still confused if the Pre 1986 two piece rear main seal blocks and what flywheel to use. Or to throw another twist is my Stroker, it is a 400 SBC crank and needs the external balanced flywheel, I haven't pulled the motor out yet so can't get at the casting number to see if it is a Pre/Post 86, one or two piece rear main seal. so finding the right flywheel, pilot bearing, will be key I am guessing as long as it is the same 153 tooth size as the LT1??

I don't know I have to do more searching and reading to narrow down the questions

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Guest Seejay

Question for all you ZX guys, Are there headers sold for the lt1 that will fit in the zx clearing the drivers side?

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Danno,

Yeah I did some searching and bookmarked a lot of the discussions about this on HybridZ a few months back and I need to go back and read them all again but the impression left in my mind goes as follows:

 

93-97 T56 from the LT1 will blt directly up to any 1986 SBC or later one piece rear seal block, just use an LT1 flywheel

98-2002 from an LS1 will not go , the input shaft is longer, a kit from Weir products and others is available or use a LT1 bellhousing and a spacer.

Where I am still confused if the Pre 1986 two piece rear main seal blocks and what flywheel to use. Or to throw another twist is my Stroker, it is a 400 SBC crank and needs the external balanced flywheel, I haven't pulled the motor out yet so can't get at the casting number to see if it is a Pre/Post 86, one or two piece rear main seal. so finding the right flywheel, pilot bearing, will be key I am guessing as long as it is the same 153 tooth size as the LT1??

I don't know I have to do more searching and reading to narrow down the questions

 

When I was thinking about going with a T56 I found this site:

http://www.5speedtransmissions.com/t56_early_gm.html

Hope it helps some.

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