LT1 in an IROC?

Brian2007 · 06-01-2002, 10:50 PM

I have an 86 Iroc with a 305 that is starting to go out. I am thinking about swapping the engine for an LT1 out of a fourth gen. Does anyone know the horsepower specs on the LT1's. Also how hard is it to swap them? Are there any sites dedicated to the swap? Any info would be apretiated.

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Aaron92677 · 06-01-2002, 11:33 PM

I have a 350 in my 89 Iroc and its a LT1 (5.7TPI)
so it might be cheeper if you swap it from a 350 iroc......
later,
aaron

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~Aaron~
1989 Camaro Iroc - Z28
5.7TPI
310hp

BitchinCamaro · 06-02-2002, 12:31 AM

Aaron, A 350 TPI and a LT1 are very different engines. No 3rd gen came equiped with a LT1.
Brian, a LT1 swap isn't all that hard. If you do a search on www.thirdgen.org 's motor swap forum you will find tons of info. They were rated at 275 and 285 hp. You want a 94-95 one if you are going to use the stock computer, they were sequential fire but still OBD I.

Goofy · 06-02-2002, 02:02 AM

Do a search here, theres about 5 or so members I've seen that have done this swap, myself included.
My website in my sig will provide you with SOME info, but its not really a guide...
Hope that helped!

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Goofy's LT-1 87 Camaro
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Car just needs paint job!
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Zepher · 06-02-2002, 04:41 AM

I am in the process of building my LT1 into an LT4 heads, intake, and LT4 Hot Cam.

I have some pics of some of the progress here, http://www.donpagevideo.com/pics/lt1/

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1986 Trans Am WS6
LT4 350, LT4 Hot Cam, T56, 52mm TB, , MSD 6A & Blaster 3 Coil, LT1 3.42 Posi/Disc Rear, Lakewood LCA's &
Adjustable Panhard Bar, Jamex Lowering Springs, 17x9 WS6 Wheels,
T-Tops, Custom 4" CAI w/ K&N Filter, 160*stat.
Autometer TriplePod.
High Speed Run: 157mph
Best 1/4 mile run: 14.94@91.67mph This was with the LG4 carb setup.
WS6 Trans Am.

irocbob89 · 06-02-2002, 01:42 PM

I start next week on my l98 to lt-1 swap, i excited. I here those lt-1's are pritty quik in irocs i dont know thow, does anyone have any times?

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89' red iroc-z
386 stroker 10.5.1
ross pistons
eagle h-beam rods
Mini ram, 58mm tb
30#lbs,255 high flow fuel pump
slp cam, 1.6rr
edelbrock performer heads p+p 2.02 1.60
Hooker super comps, Mufflex 4' exhaust
Ford 9' 4.11 gears, detroit locker, 31 spline
Full suspension
B&M mega shifter,2800 stall
baer rear brakes,line lock
converted to speed density
Ed Wright dyno tuned

89'red Iroc-z 5.7 TPI
t-tops grey interior
free mods, exhaust

badassT/A · 06-02-2002, 02:23 PM

Hey irocbob89...let me know how it goes and I'd like to check out the finished product. I'm in Chicago also and am just gathering everything I need to do the swap also in an '87 Trans Am to Lt1 6 speed. I'll probably start in the end of July if all goes according to plan. Good Luck!!!

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SOLD: 1999 Trans Am, Silver, CAGS, IAT resistor, Screened out MAF, BMR STB, FlowMaster, LS1 Motorsports lid w/K&N. SunCoast WS6 style hood. B&M Ripper Shifter.
"The Surgeon General Never Said Nuthin' 'bout Smokin' The Competition"

irocbob89 · 06-02-2002, 06:51 PM

hey good luck to you to. where do you live? that would be great if we could compare notes or something. Ill post when i have a problem, i hope you will do the same. Ill be happy to show you when its finnished. later
Bobby

Im in Hoffman Estates

slimdawson · 06-03-2002, 03:37 AM

Quote:

<font face="Verdana, Arial" size="2">Originally posted by irocbob89:
I start next week on my l98 to lt-1 swap, i excited. I here those lt-1's are pritty quik in irocs i dont know thow, does anyone have any times?

</font>

Times are in sig. That was with a Moroso CAI and SLP headers and 3" exhaust. Other than that it is stock. The sorry 60' times will be fixed soon and then I should see much better ets. The mph is good though.

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Pix of my rides!
Finally have some pictures of Y2k Vette wheels, motor, etc.

*1991 Camaro RS !LO3
8.84@85.3mph NA
*1988 Mustang 5.0 7.92@87 NA- For Sale
*1988 Mustang GT 'vert
9.56@73-bone stock
*1986 Kawasaki Ninja 1000R 7.30@100mph
*1987 Honda CRX Si 16.5@85mph-stock

100% American!

LT1Powered85Z · 06-03-2002, 12:27 PM

I've got an LT1/T56 combo. Check out the website in the sig...it's been of help to a lot of people.

Eric

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LT1Powered85Z
LT185Z (F4i, Stealth R/T TT, etc)
-'85 LT1/T56 Z28
-'01 Honda CBR600F4i
Administrator of The Minnesota F-Body Club

badassT/A · 06-03-2002, 04:57 PM

I'm as far southeast in Chicago as you can go...the neighborhoods known as Hegewisch actually. I can spit on Indiana from where I'm at. I will post whatever problems I come across but like I said before...I'm not starting until the end of July...currently just accumulating parts. Man this is going to be some big bucks.

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SOLD: 1999 Trans Am, Silver, CAGS, IAT resistor, Screened out MAF, BMR STB, FlowMaster, LS1 Motorsports lid w/K&N. SunCoast WS6 style hood. B&M Ripper Shifter.
"The Surgeon General Never Said Nuthin' 'bout Smokin' The Competition"

badassT/A · 06-03-2002, 05:06 PM

http://www.fuelinjection.com/portinj.html
http://350.streetracing.org/lt1.htm
http://sethirdgen.org/vss.htm
http://www.thirdgen.org/newdesign/tech/techdb.shtml
http://www.iroczsource.com/lt1.htm
http://www.sethirdgen.org/vats.htm

Here are a few links I've gathered that may help. Another thing I've read somewhere is that a passengerside motor mount from a '94 Caprice can be used with out having to do any modding to it. If anyone can verify this please do so.

Also, if anyone has any other good info sites, please post them.

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SOLD: 1999 Trans Am, Silver, CAGS, IAT resistor, Screened out MAF, BMR STB, FlowMaster, LS1 Motorsports lid w/K&N. SunCoast WS6 style hood. B&M Ripper Shifter.
"The Surgeon General Never Said Nuthin' 'bout Smokin' The Competition"

Eric91Z · 06-03-2002, 05:10 PM

What is the benefit of going with the LT1 (or even LS1) over a built Gen I motor with the TPIS MiniRam II intake?

Is the LT1 worth the wiring changes as opposed to building a 355 or 383 and running the TPIS MiniRam intake and using the stock ECM and burning your own chips? I ask because I have a non-LT1 350, 1 piece rear main seal block that I planning on using for a 383 build up and running the MiniRam II intake. Would it be worth considering the LT1 (or even a LS1) instead?

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Eric Mann
eric91z@mchsi.com
'91 Camaro Z28

irocz383 · 06-03-2002, 05:28 PM

IMHO, its not worth the money. You can buy a set of noce heads, cam, intake and some extra motor mods and make a lot more HP's over the LT1 motor for about the same price.

Not to mention having to re wire the engine bay...

I'm building up a 383 with AFR heads and miniram II intake and its costing my just a little more than an LT1 swap would cost.

brodyscamaro · 06-03-2002, 10:57 PM

these people have done many of those swaps. might want to check out their site(contact them) as they probably have tons of info as well

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1992 Camaro RS LO3/700R4
Holley 600 Double Pumper, Weiand Stealth Intake Manifold, Hedman Headers and Modified Hedman Y-Pipe(Ported and 3" Pipe), Straight-Pipe Cat, Flowmaster 3" 2 Chamber Race Muffler, 160º thermostat, 3.73 Posi, Boxed LCAs, Kumho 255/50s, Polyurethane Transmission Mount, and B&M SuperCooler.
Waiting To Be Installed: ZZ4 Cam