LSx Conversions

LS3 Harness pin outs

944-LT1 — Fri, 20 Nov 2009 03:24:41 GMT

Can anybody tell me (or crossout) the pins that need to be removed? 2009 LS3 harness X1 pinout (73 way): pin# wire color description 1 OG/BK Park/Neutral Switch (MYC) 2 -3 Not used 4 PU/WH - Starter Relay coil supply voltage 5-8 Not used 9 WH Brake pedal switch signal 10 PU/WH HO2S High Signal Bank 1 Sensor 2 11 TN/WH HO2S Low Signal Bank 1 Sensor 2 12 OG/BK A/C Refrigerant Pressure Sensor Signal 13 BK/WH Low Reference 14-15 Not used 16 ...

Expuppy told me of you guys, I need help.

cfgioja — Mon, 23 Nov 2009 01:37:51 GMT

Hey everyone, I am new to this forum. I managed to do a ls1 conversion on my first gen or 1/85 844. I order the complete kit from RH. I am living in Stillwater Oklahoma at the moment, only 20 mins from hallett race way and wouldn't mind seeing other 944s I am having some trouble getting my gauges to work properly. I am not sure what is going on, I am most likely goign to have to run stand alones to each guage. So first my coolant gauge sits at the halfway point when i turn the car ...

power steering pump

Vorsche944 — Thu, 20 Aug 2009 14:26:02 GMT

ok, we have the engine in and took a test run yesterday, sweet, howevfer we have PS issues Car 87 Turbo LS1 2001 Corvette with 28k miles PS pump is original Corvette with remote reservoir and PS cooler We fired up the engine and the PS is making a moaning sound We turned the wheels and the moaning got louder (if this was only so easy with women) When we went to stops we blew the PS seals on the power side. We checked and we believer we have fluid flow through the reservoir Looking ...

Spec Clutch

Bluemach1 — Tue, 17 Nov 2009 21:44:52 GMT

After trying to pick up with Gripforce where Robstah left off, I was getting nowhere fast. I was cruising the net looking for options when I came across Spec Clutch. On thier website they note a bunch of conversion clutch options. Unfortunitly none of the options were populated with data. I contacted them directly to find out what they could do for the 944 conversion. It turns out that one of the guys there is doing a 1987 951 conversion of his own! In his email he writes: "We ...

Headers, headers, HEADERS!

Johnny Johnny — Wed, 10 Jun 2009 23:35:56 GMT

OK everyone, what's the latest situation on headers? I'm not going forced induction right now, so I'd rather not do the reversed cast iron truck manifolds, and I'm certainly NOT going to spring for the RH ones. Please post your thoughts and/or experiences here. Are we limited to custom built ones?

Steering rack universal joint hits 1/2" setback plate

endrnet — Mon, 16 Nov 2009 01:31:02 GMT

Anyone have this issue?

The ujoint hits the plate behind the sbc mount, also the hard lines are about 1/64" from the engine block and modded Moroso pan. I guess I could cut the top plate in half and use the front part as a spacer only for the drivers side.

Leak at rear of engine

Bluemach1 — Sat, 14 Nov 2009 22:43:55 GMT

Seperated trans from engine today to find that the rear seal is leaking. Actually I think it might be the plug behind the pilot bearing. I found a post on another site that deals with this and even has a short clip. Here is the link: http://www.ls1tech.com/forums/manual-transmission/980305-oil-leak.html I will replace the seal and the plug at the same time. I understand that there is a tool needed for the seal.... Could use some more direction on this. Here are pictures of ...

Where are you with your conversion?

endrnet — Fri, 25 Sep 2009 03:49:26 GMT

I've been feeling there's a bit of a lack of posts on "here's where I am with my overall project" type posts, so I'm going to put some basics of my conversion up to share with the community. Several members here have been very helpful thus far on my conversion, and there may be lurkers that are considering the conversion (I'm doing it!). My automotive background is: I always do my own oil, brakes, alt/comp replacements, exhaust replacement (stock). Until this week, I never held ...

Hello....fellas

aixgelo78 — Wed, 11 Nov 2009 00:42:36 GMT

Just wanted to introduce myself officially here since I have been lurking these boards for a while now. I have been gathering as much info about these conversions for a couple of months, but it tends to be overwhelming. So I am appologizing in advance for some newb questions I may have.... I am not a novice wrenching, but not a pro to say the least. I have done a dozen or so engine pulls with audis for turbo swaps, plus hondas when I was younger. So, I can wrench, but at this point i have ...

ECM OBDII Question

Bluemach1 — Wed, 11 Nov 2009 23:25:12 GMT

I am a little perplexed about something. After reading through several sites and Gregs manual I still dont know where the OBDII connector gets integrated into the electrical system. This must be very obvious becasue I have not seen this asked anywhere else.

Please enlighten me.

LS1 aftermarket gauge hook up

Admin — Tue, 10 Nov 2009 01:59:06 GMT

Maybe this has been gone over before, but I'm going to do it again if it has.. If you need to hook up an aftermarket temp gauge to your LS motor you will soon find that there is not many choices out there. Unless you want to special order a sending unit that will thread into the LS head(12mmx1.5) I bought an off the shelf gauge this weekend and installed it using a factory PCM temp sending unit. You cannot use the same sensor as the computer reads as it will confuse the computer, You ...

Need info: where to buy...

Porch — Wed, 04 Nov 2009 16:24:16 GMT

A guy i know is writing a book on LS motor swaps into various chassis. I've talked with him on other forums before, and seems interested in our swaps. One of the questions he asked was where to buy parts... I know how some of us feel about RH, but they do have parts on the shelf ready to go, so they'll be in the list. 944hybrids has a few of the necessary parts. Are there any other sources of parts that i should be aware of? I know there have been a few mentioned, but they seem to come ...

What Clutch Are You Running?

Bluemach1 — Mon, 02 Nov 2009 21:43:22 GMT

A question to those who are up and running:

What clutch / pressure plate did you end up using? (P/N's ??)
Where did you buy from?
How much did you pay? (is this ok admin?)............Yes, Admin edit
Would you recommend this set up to others?

Maybe note what engine you have?

Thanks,
Ted

LSx Clutch

944-LT1 — Mon, 12 Oct 2009 03:14:15 GMT

Well, this is what Ive found during getting the clutch stuff. May help someone else. The flywheel: GM part number 12571611 This flywheel is steel and heavy @ 57 lbs. Its friction surface is 2.50" wide and the stock size clutch disc used on this flywheel is 11-7/16". However, nobody makes an 11-7/16" 23 spline by 1" disc. So the best Ive found is an 11" x1"-23 spline. A 12" disc wont fit either! What you CAN do is buy a 12" disc and then have ...

ECU and Harness questions

968gene — Mon, 07 Sep 2009 14:01:50 GMT

Is there a preferred ECU to run with the 5.3L conversion? Is there a preferred wire harness?
My understanding is that any of the LS1 or Vortec ECUs can be flashed to run the 5.3L. Is this true?
I also understand that the truck and car harnesses differ in that the injector plugs are different and the truck harness stays under the hood while the car harness places the ECU inside the passenger compartment.
Thanks in advance for the feedback.
Gene

oil pan options

968gene — Tue, 07 Jul 2009 01:55:28 GMT

found this on eBay. Would this work without modification? http://cgi.ebay.com/ebaymotors/LH8-H3-complete-oil-pan-kit-Muscle-Car-pan-GM-LS1-LS2_W0QQitemZ290327981829QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item4398e56f05&_trksid=p4506.c0.m245&_trkparms=65%3A7%7C39%3A1#ht_500wt_963 Thanks, Gene

Installation, Hood Clearance, and Cowl Induction

968gene — Mon, 20 Jul 2009 23:42:38 GMT

I saw this and was wondering if anyone has reversed the intake on an LS and pulled air from the cowl area. I won't have the AC/Heater to deal with on the race car. Comments?
http://www.vararam.com/sdr.html

Convertion d'un francaise

Joe — Wed, 09 Sep 2009 21:43:20 GMT

Bonjour je m'appelle Jonathan,j'habite 50 km de paris, je débute la conversion de ma 944 DE 1983 et souhaite partager avec vous l'avancement des travaux. J'ai beaucoup regarde vos différents postes qui sont d'une grande richesse. j'ai pris contact avec texas performance pour mes premières pièces de convertion je vous ferais bientôt des photos de mon auto et de l'avancement de mes travaux Merci jonathan Hye I'm Jonathan! ilive near from Paris and i'm beginning ...

LS Engine sourcing

endrnet — Sun, 16 Aug 2009 17:33:16 GMT

Anyone have suggestions on where to source an LS motor, and the risks associated with the various options? Promarengine seems to have LS1/6 longs for around 3k chickens, a new crate from Jegs is about 5.7k chickens. I've seen various [more dubious] engines in various states of mileage and/or disrepair on ebay and craigslist. Those cheaper alternatives might "work" but might have problems that would eat my project time and add costs that are not predictable. I'm not interested ...

O2 sensor bung location

endrnet — Mon, 19 Oct 2009 02:09:12 GMT

Where are you guys welding in the bung for the front O2 sensors? From working on my other cars and from what I've seen, they are either right on the exhaust manifold or sometimes the just past it on the downpipe. I'm tempted to weld it into the first section beyond the headers on the downpipe. Putting it further up would seem to either 1) interfere with various flanges or bolt areas, or 2) If put in the collector it would tend to get more of a reading from the nearest cyl rather ...

I always thought the v8 Conversion was the way to go

Vorsche944 — Thu, 15 Oct 2009 00:42:53 GMT

and this link proves it.

http://dallas.craigslist.org/dal/cto/1421603314.html

I can now use female logic with my wife and tell how much money I saved.

LSn? -You went to the dark side-

RobotMachines — Mon, 12 Oct 2009 02:43:03 GMT

MK,

So, eh hem, you switched to an LS engine. Have you driven it yet? Why make the switch? I'm curious. I like my LT but as LS engines get cheaper, it would probably be easy for me to switch over... or will it. Will the LT bell housing work with the LS?

Anyway, why the switch (stinker)? Will it be that much better?

What's wrong with this picture?

endrnet — Sat, 03 Oct 2009 17:58:02 GMT

This is a lot of pan depth showing.

expuppy web page

expuppy — Mon, 05 Oct 2009 20:59:33 GMT

if anyone here had my old home page marked, it has changed. The new site is www.expuppy.com ( yep, bought the domain from Danica). I did add a video page and a page with a couple of mindlessly funny videos.

Clutch hoses and fittings

Johnny Johnny — Thu, 16 Jul 2009 12:47:20 GMT

I'm using a Corvette C5 clutch slave cylinder/throwout bearing assembly, and for the life of my I can't figure out what hoses/fittings to use to connect it to my 944 master cylinder. The slave already has a short braided input line that has a proprietary GM fitting on the end of it (prevents air from getting in to the system when unplugged), and the return line has a weird machined hex-head fitting with a hole on the end.

What gives?

Donor Car Eminent!!

Bluemach1 — Wed, 23 Sep 2009 16:12:19 GMT

It looks like will be picking up a 2000 WS6 Trans Am, 59k, complete except for front sheet metal.

I know that this is a broad question, but what do I need to pull off of this donor besides the engine, belt driven accessories, trans, ECM and wireing? Thats the stuff you always see advertised with the swap packages from the yards.

I know, I need to read the FAQ's again. Just excited right now!

Tach question

dallas — Wed, 23 Sep 2009 00:07:10 GMT

Ok, the tach worked before the conversion. I found the wire on pin 3 of the center cluster plug. The ecm has 1.3volts at idle to ground (computer case) But tach still doesn't work. Am I missing something here? Does tach need something else. My tach is wired into a 4 pin red plug (pin#2 grn/bk)on the passenger side.I disconnected the plug from the harness going to the Porsche engine. All I should have to due is hook the tach wire from the ecm to it? No dice.Any ideas?

Bypassing the F-body/Corvette accessories

xschop — Thu, 17 Sep 2009 13:05:42 GMT

Allright here's my solution to this problem... To get the LS Intake on the 4.8/5.3/6.0 motors, I ran into the problem of the water snout on the truck motor sticking up and interfering with the throttle body. No big deal, I get the C5 Corvette water pump and move on because the water snout sticks straight out and clears the throttle. After sticking on the C5 pump here's what I ran into. The C5 Water pump drive-bell sets too far back towards the block, not allowing the Serpentine belt to ride ...

Help Locate/I.D. a couple wires

xschop — Mon, 14 Sep 2009 08:58:33 GMT

The ink on some of the masking tape I used completely faded when I was disassembling everything a few months ago.....so where do these wires go? The large one is a thick 8-10 guage solid black and loops around in the pic. The red one has thin black stripes and the blue wire both connect near the firewall....Any Idea?

ITB's Anyone?

968gene — Thu, 10 Sep 2009 00:21:59 GMT

Found this online. Nice huh?

It's finally underway.

dallas — Mon, 17 Aug 2009 22:25:07 GMT

No, it actually started back June 19th. I finally started my gallery here. Hope the pics help those starting now. I'll post more as I finish up. Hope to be running by labor day. Wiring might be a pita though.

LS clutch diameters

944-LT1 — Wed, 26 Aug 2009 07:33:08 GMT

What is the 2008 corvette clutch disc diameter or LS7 diameter? Cant find it!

Lowering the front after the conversion

Porch — Tue, 08 Sep 2009 15:55:56 GMT

I had asked this before (so i apologize in advance for asking the same question), but i don't think i ever got a satisfactory solution on phb! After the LS-swap using the RH kit, my car sits about 1" too high in the front. This is an '87 951. With the factory motor the wheels sat at just the right height. I have Koni yellows in the front, and i would prefer to keep those. I have a set of Welts 250lb springs that i can install--they're a 1.5" drop--but then that puts my ...

Someone got a 944 Turbo Today!

Bluemach1 — Sun, 06 Sep 2009 01:31:50 GMT

And does it need some love!

Motor going in for the final time, or maybe not...

Johnny Johnny — Tue, 01 Sep 2009 19:36:32 GMT

Just thought I'd write up the latest step in my conversion - installing the motor for the final time. It's been in-and-out probably 20 times so far, and I was hoping to put it back in today for the last time. Unfortunately, there was a problem and I've got more work ahead of me. Here's some experiences/observations that might be useful for others: 1. I had to drop the crossmember to get the engine in with the clutch and oil pan installed. I've not had to do this before, since I never had ...

Trailering

Bluemach1 — Sat, 05 Sep 2009 01:36:04 GMT

picking up 944 turbo tomorrow morning. Any tips on trailering a 944? points to secure to?

LM7 silverado truck engine... opinions?

spence — Wed, 19 Aug 2009 23:46:15 GMT

I found a cheap low KM LM7 with all accessories, wiring and ecu and I'm wondering if its worth looking into. Does anyone have an opinion? Does anyone know the weight compared to a LT1? They have to be similar in weight, but I can't find any info. I think all the parts from the LS-1 are interchangeable as well. Any opinions are a great help.

Thanks,
Spencer

1986 Turbo Options - Help

Bluemach1 — Tue, 01 Sep 2009 17:47:00 GMT

I am looking at a 86 turbo. The owner gave me the option codes. Two of them I can not identify. 141 and 142.

Anyone know what these are?

Peformance Systems Integration, Vendor Recommendation

948 — Thu, 03 Sep 2009 16:11:07 GMT

I had a good experience with a small purchase I made from PSI. My questions, phone and email, were quickly answered by Jon.
Snip "They specialize in developing and packaging components and kits for retrofitting older vehicles with Electronic Fuel Injection (EFI), most notably the GM LT1 & LS1/LS6/LS2/Vortec Engines"
PSI <==Click me!

Headers Part 2

968gene — Thu, 23 Jul 2009 01:51:57 GMT

Take a look at this video. Could there be enough interest on the board to have a master mock up built and then we each place our orders? SS headers may be a little pricey, but they would also perform better due to equal length, etc. Anyone game for this?
http://www.stainlessheaders.com/index.aspx

Just the alternator and H2O Pump please

968gene — Thu, 27 Aug 2009 01:21:23 GMT

I will only need an alternator and water pump on my track car. Does anyone have suggestions on the proper setup (brackets etc.) for an LSx? I will be using a 5.3 block. Thanks in advance. Gene

How can this happen??

968gene — Mon, 24 Aug 2009 01:49:50 GMT

I was reading on 968forums about several 968 conversions that were done using LS1's without dropping the crossmember and the intake fits under the 968 hood which has less clearance than the 944. How does that work?

LS1 Fuel Line Install

Admin — Fri, 17 Jul 2009 00:42:02 GMT

I just wanted to show what I did on Vorsche's car for the fuel lines. I used nylon hose end splices for the connections to the filter for easy change outs. I put it right where the old coil used to be. The lines are ran between the finder liner and metal inner fender. They are secured and protected here.

LS1 from an Auto transaxle car

endrnet — Thu, 20 Aug 2009 23:23:20 GMT

What would you guys recommend for a reasonably priced set of parts for the back of the motor to convert from auto to manual on an oem auto ls1?

Turbo vs. S2

Bluemach1 — Thu, 20 Aug 2009 15:13:21 GMT

I am actively looking for the car that will be the base of the LSx swap. I have a couple of questions. I have gathered that a 1987 and up Turbo would be the most preferred car to swap the LS into. But is it true that the S2 has the same drivetrain (excluding engine) as the Turbo? The S2 has the same spindles / brakes as the Turbo. So I guess the real question is, beside the engine and exterior cosmetics, are the Turbo and S2 the same? Thoughts?

Any Midwest People?

924s driver — Wed, 08 Jul 2009 18:38:32 GMT

Like the title says. Missouri Illinois people on here?

Any California People?

Bluemach1 — Wed, 19 Aug 2009 04:11:19 GMT

I am in Nor Cal. Anyone else out there?

California Conversion

Bluemach1 — Tue, 18 Aug 2009 22:35:35 GMT

Hello! I am new to the board and will be doing my first 944 LSx conversion. My main concern with doing the conversion in california is getting through the smog inspection. Has anyone here been through the process? If so, could you please shed some light on what I will be in for with the referee, smog testing, etc? Anyone put together a build list specifically for the CA build? Is it true that the engine that is used must be from the same class vehicle (can not use a truck engine)? Any ...

Stock oil pan dimesnsions

Admin — Sat, 15 Aug 2009 01:45:00 GMT

Does anyone have a stock oil pan that they can post pictures of and show me the dimensions of what the pan looks like before any mods are done? Prefer the Camaro and Corvette pan dim's.

oil line recommendation.

dallas — Fri, 14 Aug 2009 01:22:52 GMT

Any recommendations on oil lines? Our lines come pretty close to the headers. Anyone not have any problems? What mfg are your lines? The ones I've seen are only rated for 250f. The headers might get them hotter than that.(sitting in traffic) Thanks in adv. Alex