LS2 in a XR4 Underway /Pics Update...

grve66 · Post by **grve66** » Fri Jun 27, 2008 6:42 pm

Well I finally got started on my project. I am in the process of installing a GM LS2 in a XR$TI.

Pulled old motor yesterday and started to drop motor in today. Motor fits fine, maybe a little tunnel shaping. but thats about it. Rapido T-5 cross member works with the T56 6 speed. so that was nice.

I am using a GMPP computer harness with Drive by wire throttle. Has pontiac G8 accessories, GTO trans, airbox and exhaust manifolds, LS7 clutch. I am doing the Hydraulic clutch "A la" Tim Roman style.

will get some pics up in a bit. Tommorrow I get to finalize pan requirements, so I can start making engine mounts. The oil pan I wanted to use was to deep. and was sticking out the bottom about 3"

motor view
http://i2.photobucket.com/albums/y19/gr ... C00529.jpg
http://i2.photobucket.com/albums/y19/gr ... C00531.jpg

front balancer clearance
http://i2.photobucket.com/albums/y19/gr ... C00530.jpg

http://i2.photobucket.com/albums/y19/gr ... C00532.jpg

pan clearance
http://i2.photobucket.com/albums/y19/gr ... C00526.jpg

firewall
http://i2.photobucket.com/albums/y19/gr ... C00528.jpg

more firewall
http://i2.photobucket.com/albums/y19/gr ... C00527.jpg

trans tunnel
http://i2.photobucket.com/albums/y19/gr ... C00525.jpg

under hood clearance
http://i2.photobucket.com/albums/y19/gr ... C00517.jpg

more clearance
http://i2.photobucket.com/albums/y19/gr ... C00521.jpg

Post by **hEaT** » Fri Jun 27, 2008 7:31 pm

Sounds awesome.

Post by **DPDISXR4Ti** » Fri Jun 27, 2008 10:01 pm

Screw keeping it in the family - that's an awesome power-plant to be putting in an XR!

And just to make it more insane, you'll get better highway fuel mileage than a stock XR to go along with your 400HP.

Is that a crate engine or a junkyard one?

What are your plans for engine management?

Keep the updates coming. Carlisle 2009?

grve66 · Post by **grve66** » Fri Jun 27, 2008 10:56 pm

I bought an 07' 7000mi Trailblazer SS long block, corvette LS2 intake along with Pontiac G8 accessories. Trans is a 6000mi GTO T56. All accessories I took a hit on, cause they are all 08' as for Engine management.

I am using a GM performance parts LS2 crate motor harness, come with DBW throttle pedal, o2's with bungs, 100mm MAF meter with mounting base to weld on tube and Ecm. Has complete fuse box. Just hook up power and you done. fan and fuel pump wires are already fused and relayed. also has a OBD2 port, it's real slick

I was hitting all the boards.. I found Corvette owners just give their stuff away

Vs. The Camaro/firebird forums though.
I got some good deals. and with the help of Jaxed.com(it's nationwide craiglist parts search)

Ray · Post by **Ray** » Sat Jun 28, 2008 6:21 am

BAD

ASS

i'll be following this build for sure. wild.

grve66 · Post by **grve66** » Sat Jun 28, 2008 8:29 pm

Got the fuel system figured out. I am trying to make this smog legal. So I Bought a GTO fuel pump assembly. The thing is friggin huge, it wont even fit in the hole from the stock Xr sending unit/tank assembly. spank.gif Well so much for using that, good thing it was only $50 shipped. plus I got the level sender and pressure sensor with harnesses so I am happy.

So I pulled the Fuel tank pressure sensor and fuel level potential meter off the GTO pump assembly. I took off the old Ford level sender and was able to mount the GTO level sender on the XR fuel pump assembly along with drilling a hole in the top for the pressure sensor. and going to use a corvette fuel filter that will let me use my return line and keep the returnless fuel system up front. pressure is self regulated in the filter.

More pics on monday.

whitelx · Post by **whitelx** » Sat Jun 28, 2008 11:53 pm

what are the benefits of the LS2 over the LS1? Do they make a similar harness/ECU setup for LS1 swaps? I like the idea of a cable throttle from the F-body than the drive-by-wire on the LS2.

grve66 · Post by **grve66** » Sun Jun 29, 2008 9:17 am

difference is about a 50hp. more cubes 360ci LS2 6.0l or Ls1 5.7l 346ci. and more Tq.. Ls1 rates at 325hp in the f-body and 350hp in the vettes
ls2 rates 400hp 400tq.

I found that the LS1, unless you get into a 02 and up you have a EGR valve. and air pump. I wanted the least amount of smog equipment) and withthe LS2 it has no egr or smog pump. just and tank canister purge valve and thats it for smog. very simplified.

With a ls1 97-00 it has weaker rod bolts and a lower flowing intake than a 01-04 ls1. Which the 04 LS1 is hard to come by since it was only offered in the 04 GTO and corvette. the 01-04 motors have the better rod bolts and a LS6 intake which is a upgrade vs the stock LS1 intake.

I went with DBW cause it one less thing in the engine room and the GM harness I bought which is actually a good deal.(900 shipped) comes with the DBW pedal, ECM, MAF and o2's.

unfortunatly Gm only sells the Harness for the 07 and up motor which have a 58 tooth reluctor wheel vs the all LS1's and 05-06 ls2 with a 24 tooth wheel.

Painless makes a harness for the Ls1's and there are several companies that make them. also ranging from $700 with no ECM to $1400 with everything.

GeneticRehab · Post by **GeneticRehab** » Sun Jun 29, 2008 10:20 am

When GM was doing the auto car in motion promo. I got to drive the Vette and the GTO around a small autocross course. Having 400hp an 405 ftlbs torque right now is very fun. Plus the sound that engine make. mmmmmmmm! Good luck on the build. Looking forward one day seeing it Carlisle some day.

Post by **DPDISXR4Ti** » Sun Jun 29, 2008 10:21 am

grve66 wrote:I went with DBW cause it one less thing in the engine room and the GM harness I bought which is actually a good deal.(900 shipped) comes with the DBW pedal, ECM, MAF and o2's.

You're right, that's a pretty good deal, all things considered. Is it packaged as a "universal" bolt-on sort of deal for a non-original (i.e. hot-rod) sort of application? I know the challenge people often run into when trying to adapt EEC-V stuff is the PATS security stuff that has to be worked around. Is there none of that here?

Aside from the power advantage with the LS2 (vs. LS1), isn't it also more compact and lighter?

BeefFajitas · Post by **BeefFajitas** » Sun Jun 29, 2008 10:48 am

I don't think so. All the hard parts are backwards compatible with the LS1. That's the big thing to do right now is take the L92 heads and swap them onto the LS1.

grve66 · Post by **grve66** » Sun Jun 29, 2008 10:55 am

DPDISXR4Ti wrote:
You're right, that's a pretty good deal, all things considered. Is it packaged as a "universal" bolt-on sort of deal for a non-original (i.e. hot-rod) sort of application? I know the challenge people often run into when trying to adapt EEC-V stuff is the PATS security stuff that has to be worked around. Is there none of that here?

Aside from the power advantage with the LS2 (vs. LS1), isn't it also more compact and lighter?

If you went with a harness made from some of the other suppliers you would have to have the ECM reflashed to delete what GM calls "Vats" and tune out rear o2's air intake temp and a few other things.

Thats why I went with the GM setup. it's all done for you already. I will be able to get it reflashed when I am ready to make it smog legal. Only have to add a few pins for rear o2's, evap purge solenoid and air intake temp.

yes packaged as a universal drop in with fuse box and everything.

http://i8.tinypic.com/80w7v36.jpg
http://i1.tinypic.com/71wmxdi.jpg
http://i6.tinypic.com/72aeiaw.jpg

motor are both aluminum maybe 20 lbs difference

Post by **DPDISXR4Ti** » Mon Jun 30, 2008 1:03 pm

It'll be interesting to see if (probably more like "when") DOD is added to the LS2. Much of the required changes to support DOD are already there and test mules have already been built (reportedly yielding 35 MPG on the highway in a Corvette). How sick would it be to drive to and from Carlisle on well less than a tank of fuel, and include a 400 HP dyno run just to put some icing on the cake.

onebad7up · Post by **onebad7up** » Mon Jun 30, 2008 7:41 pm

A co-worker just bought an 07 TBSS and that thing runs great. I could not imagine it in a XR.

Keep us posted!

Rotisserie · Post by **Rotisserie** » Mon Jun 30, 2008 9:36 pm

oh my.

an LS block is a fine altenative to turbo. heck, i woulda settled for an old 302 block.