My LSx Coupe Build

[dville_gt]

Well, it's probably ghetto as hell, but I picked up some 4in drier duct at Lowes today, I originally got it to use as mock up for when I get some mandrel 4inch pipe. Well, I got it all in there and the inside is actually pretty smooth (a lot better than the PVC pipe). I might just run this for a while and see what my MAP numbers look like with it. It goes from the T/B into the drivers side fender well. I relocated the MAF into the fenderwell as well (only using it as a IAT sensor as I am running speed density), but it is still getting some heat soak so I bought a thermistor and am going to mount the sensor in the front bumper to give it fresh air.



One problem I did run into today is the cooling system isn't up to the job w/ac on. Got up to 230+ degrees today cruising around town (granted it was 103* when I was cruising). I cut out the kinked upper radiator hose and put in a 90* elbow to make sure that my problem isn't caused by the funky upper radiator hose I had been running, if that doesn't fix it I guess I'll have to go to an aftermarket radiator. There is one on eBay for like 240 that has a lot of good reviews concerning performance vs. stock.

Oh, and I blew out 2 200amp ANL fuses today trying to get the a/c idle under control, ended up putting in a 300amp fuse and haven't had any problems yet. I guess the 2/o wire, all the accessories on, heat soaked starter, and me hitting the starter over and over were too much for the 200amp fuse!

[dville_gt]

Grab some of the water outlet spacers and get a car pump. There are plenty of truck guys who have done this.

$75 for the spacers and $85 for the waterpump = $160 when the L99 waterpump is only $180 from the general w/new bolts and gaskets. Just hate replacing good parts when there are other places I'd rather put the money.

[NoClassic]

Grab some of the water outlet spacers and get a car pump. There are plenty of truck guys who have done this.

[Buick355]

Lots of thanks to Buick355 for helping me

No prob, glad to help. That's a bad ass car you have there!

[XR_1]

I need to get a different upper radiator hose, trying to figure out some way to make the hose have a straighter path as I think the wild 180* turn it makes it inhibiting flow to the radiator. I cant really switch to car accessories now as the a/c compressor is a Denso off the Escalade. Other option is an LS3 waterpump which has the correct pulley alignment for the truck accessories but they are still pretty high dollar since you can only get them from the dealer.

Try making a pipe to run it the way you want instead of using a radiator hose (thats how I did it)

[Sam88gta1]

Now it's back to making her fast again, gotta spend some time with HP tuners this weekend. Going to go buy a seperate IAT sensor so I can ditch the MAF and mount the IAT somewhere outside of the engine bay (sans heatsoak). Going to keep the car speed density and see what she does. I am a little afraid to know how much weight I've added through this whole A/C install (good thing I didn't weigh it before hand so I wont feel bad). I am hoping I can pull a 6.9 as it sits with a real good tune (and the new rear suspension). Might take some good air though.

Dont be scared to keep the car in SD mode. It will run faster and get better fuel mileage this way.
Sent email back.

[dville_gt]

Yeah that coupe is pretty quick....mid 6's on stock shitty suspension

It definitely wasn't going anywhere near mid 6's when we ran (at the cruise), more like 8.0 I believe. Must have gotten his issues figured out since then.

From what I heard from some other DFWMustangs guys that guy was less than sociable and when we were lining up I gave him a nod and he spit out the window towards my car, needless to say I wasn't too sad seeing him in my rear-view mirrors.

[Wicked98Snake]

Now I'm even more jealous, great!!!

[Juiced4v]

yep

Yeah that coupe is pretty quick....mid 6's on stock shitty suspension

[dville_gt]

Awesome. You're like one of maybe 3-5 people who've got this all sorted out with the mustang/LSx crowd.

Only thing i'd change if i were doing it again would be the accumulator, since I had to have it modified (had to get the fitting re-clocked/re-welded) so when it comes time to replace it I'll have to do it again (granted it only cost $20 to get that done).

I need to get a different upper radiator hose, trying to figure out some way to make the hose have a straighter path as I think the wild 180* turn it makes it inhibiting flow to the radiator. I cant really switch to car accessories now as the a/c compressor is a Denso off the Escalade. Other option is an LS3 waterpump which has the correct pulley alignment for the truck accessories but they are still pretty high dollar since you can only get them from the dealer.

Lots of thanks to Buick355 for helping me not once, but twice charge the system (tried to improvise the first time around the fact that there was no traditional low-side suction port, only a switch port that we tried to charge from and ended up crushing the schrader valve in the process, which caused me to loose just enough freon to make the compressor cycle), I then evac'ed the system and had a true low side port welded onto the suction hose. System charged perfectly after that.

Now it's back to making her fast again, gotta spend some time with HP tuners this weekend. Going to go buy a seperate IAT sensor so I can ditch the MAF and mount the IAT somewhere outside of the engine bay (sans heatsoak). Going to keep the car speed density and see what she does. I am a little afraid to know how much weight I've added through this whole A/C install (good thing I didn't weigh it before hand so I wont feel bad). I am hoping I can pull a 6.9 as it sits with a real good tune (and the new rear suspension). Might take some good air though.

[jw33]

Awesome. You're like one of maybe 3-5 people who've got this all sorted out with the mustang/LSx crowd.

[dville_gt]

AC blows cold now!

[dville_gt]

AFR error will either ruin your day or brighten it up the first time you run it.
You cant rely on the stock knock sensors unless they are both new as well as the harness that plugs into them. They are notorious for going bad and picking up false knock. It will drive you crazy trying to diagnose it. Ill send you a timing table that will be spot on. I have five SD files from that same exact combo. Be carefull what information you get from the HpTuners board. The guys who really know the software talk the least. The guys who want everyone to think they know it all talk the most.

That makes me feel quite a bit better about the KR. What I found most strange was that it was not consistant, some cruises I'd have lots of KR down low, others only very little, then sometimes none. The log that showed the most was when I tried pulling some timing in the lower cells to combat a small amount of KR I was seeing, the result, 7+ degrees of KR down low in some cells. Could not believe what I was seeing (possibly rightfully so). Look forward to seeing the spark table, this is by far the most confusing part of the equation for me since it seems impossible to find the sweet spot via logging. I'll be sure to take HPT's board with a grain of salt, I see what you mean about the quiet vs. outspoken members. The quiet ones are actually tuning.

[Sam88gta1]

Thanks, I ended up grabbing it for $25 from a buddy who didn't need it any more. I have to agree that had I paid $250 for it I'd be feeling pretty burned on the deal, it is informative, but if you read through some of the better post on HPTuners forum you can pick up the same info. I didn't realize how off my tune was until I got to log afr error, it was wild, lean up top, rich as hell down low. The only part of the deal I am having trouble with is how to get the best spark advance curve, I am just taking timing out in the areas that I am loggin KR, seems less than ideal however since you can only tell where you have too much timing, no real way to determine the areas that don't have enough timing.

AFR error will either ruin your day or brighten it up the first time you run it.
You cant rely on the stock knock sensors unless they are both new as well as the harness that plugs into them. They are notorious for going bad and picking up false knock. It will drive you crazy trying to diagnose it. Ill send you a timing table that will be spot on. I have five SD files from that same exact combo. Be carefull what information you get from the HpTuners board. The guys who really know the software talk the least. The guys who want everyone to think they know it all talk the most.

[dville_gt]

Was it a coupe with black primer? Skinny messican guy driving it?

yep