Snake Bite XLR-V - Page 2

cam99 · 04-03-2011, 01:26 PM

This is a great thread. Very nice numbers

. Is the management being done with a stand alone system or the factory ecm? If factory what software can you tune it with.

GizmoQ · 04-03-2011, 05:03 PM

Quote:

Originally Posted by cam99

This is a great thread. Very nice numbers

. Is the management being done with a stand alone system or the factory ecm? If factory what software can you tune it with.

Jesse used EFILive on the factory ECM.

cam99 · 04-03-2011, 08:01 PM

Quote:

Originally Posted by GizmoQ

Jesse used HPTuners on the factory ECM.

Thats good to know. i'll have to see if any of the local tuners here that use hpt are experienced with cadillac. i'm coming from a long line of mustangs, so i don't know any reputable gm shops here. maybe i missed it in your post, but did they end up using a smaller upper, or larger lower pulley to gain boost, or was it all in the port work?

GizmoQ · 04-03-2011, 08:27 PM

Quote:

Originally Posted by cam99

... maybe i missed it in your post, but did they end up using a smaller upper, or larger lower pulley to gain boost, or was it all in the port work?

Neither, changed the internal gears inside the supercharger.

cam99 · 04-04-2011, 09:23 AM

Quote:

Originally Posted by GizmoQ

Neither, changed the internal gears inside the supercharger.

Very good. Can't wait to see how the car progesses

GizmoQ · 04-06-2011, 08:23 PM

GizmoQ · 04-06-2011, 08:30 PM

Well had a scare this weekend. Was on my way to autocross on Sunday, got behind a slower car on I-70, went to pass and as the passing gear kicked in the blower spun up super fast. There was a loud thud and then P0014/P0024 and the exhaust cams were out of sync with the Crank. The motor rattled and shook and sounded like a hoopty without a muffler. Power went way down and oil pressure dropped to 10PSI. I thought I blew the heads of the motor. Had it towed to the dealership, told them what I did, and what happen and left it to them.

Dealership said the crank bolt had backed out and caused the low oil pressure. The low oil pressure caused the cam position system to malfunction, etc, etc, etc. The MasterTech who works on my car there said this is also seen on the ZR1 Corvettes where the threads on the crankbolt get stretched so GM redesigned the bolt and that's what he put into my motor.

Moral of the story: I have renamed this mod from Snake Bite to Rattler (Must be a Diamondback cause this ain't been cheap

). This is the third time I've had bolts walk out of their seats since I installed this supercharger. The SC and the gears rattle so much the car wants to disintegrate. I don't feel it from my seat of the pants meter, but I know its there. I will be checking the bolts everywhere on at least a monthly basis from now on.

cam99 · 04-07-2011, 01:19 PM

Glad to hear all is good. had a similar experience on one of my Cobra's. Went to pass someone, floored it, and heard a loud thud and loss of power. Limped to the side of the road to find the blower belt shreded, hit the hood (thud) and loss of power from the blower not turning. Thought I had shot a rod out!

GizmoQ · 05-28-2011, 10:38 PM

Not specifically performance mods but I finally have my engine cover cut, glassed, and painted. Cheap cellphone pics:

I wanted the covers to hide the sides of the motor but only extend up to the intake runners. Looks much better in person. Now I have to put about 10 coat of wax on them and then install the emblems. Whew, I think I'll take a break tomorrow and enjoy the Indy 500 (got paddock box seats this year).

Oh yeah, Bob, I also finished my rear chrome wire mesh grille. It turned out great. Just what I wanted to achieve. It, too, needs about 10 coats of wax, but it'll wait till next week.

TED · 05-30-2011, 08:39 PM

Just what crank bolt are you talking about ? Crankshaft main bearing cap bolt? Conecting rod bolt ? Harmonic ballencor bolt ? Thank you , TED

GizmoQ · 05-30-2011, 11:24 PM

Quote:

Originally Posted by TED

Just what crank bolt are you talking about ? Crankshaft main bearing cap bolt? Conecting rod bolt ? Harmonic ballencor bolt ? Thank you , TED

I believe its the one on the Harmonic Balancer.

As I got back into town returning from the Indy 500, I was passed by a brand new vette with an identical rear fascia as the one I just made. So much for originality.

GizmoQ · 08-16-2011, 10:45 PM

Been a while since I last posted. Not much going into mods been traveling mostly. Tracked the car twice, so had to replace tires again.

Computer is in, joystick is in. Data logging has begun (can't read IAT2, yet.

) Computer mod not done completely. I still have to add my HDRadio and get rid of a slight RFI problem. Didn't know there was so much heat transferred to the rollbars. Computer temp is too high so need to add some ventilation.

After another 4000 miles, I finally got around to gutting the cats. My local muffler shop opened the bottom half of the cats and pulled all the guts out, then welded the bottoms back on. Looks clean, no leaks, and breathes much better.

Sound is more hollow, not as deep like before - I can tell the exhaust flows faster (went from 60s muscle car to ferrari). Exhaust does smell, but I'm moving too fast to smell it most of the time. Downshifts are SICK - whole lotta rumble.:lildevil: Unfortunately, until I find out why my exhaust ports aren't closing it has a bad drone, pitch is a little higher, unnoticeable to casual bystander. So need Corsas now. Inside is pretty much the same, throttle's just more responsive (like I ever thought that could happen). Outside is definitely a different note. Startup is loud as hell, then 10 seconds to calm idle (sweet rumble), WOT is ridiculous - its louder on both ends, intake and exhaust!

As soon as someone figures out how to reduce IAT2 it'll be time for a retune.

GizmoQ · 03-03-2012, 10:46 PM

Mod hell continues...

Took a quick vacation to Florida for the CTS-V Shootout at Palm Beach International Raceway. The group rented the track for the whole day 9-4. 20 Cadillacs showed up, 16 ready to race. One guy drove down from Milwaukee and took his snow tires off to put on his Drag Radials.

Watching the CTS-V guys drag race all day really got to me. Totally stock 2010 V2 sedan had the nerve to run a 12.07 on drag radials. Super modified 2009 V2 sedan ran 10.43 without using his 300 shot nitrous (just imagine what nitrous would do). By the afternoon, they goaded me into running Elwood. My best time after three runs was 12.873 @110.5 with a 2.134 60ft time. Road tires and gradual throttle input kept my 60ft times pretty high and I still lost traction in the first to second shift. But I digress....

The Florida trip was to drop off Elwood for cooling mods. A Super Chiller is being added to the supercharger intercooler line and meth injection is being added to the intakes. Hopefully, with these two mods IAT and IAT2 temps can be reduced enough to add more timing and finally achieve my goal RWHP.

The Super Chiller is basically an interface between the AC and intercooler coolant that chills the intercooler coolant to ~50 degrees. The simplest description of a Super Chiller is that it makes cold water. There is no way a water to air heat exchanger is going to make 50 deg water when its 95 deg out. With coolant refrigerated to low 50s the intercooler will be as efficient as possible. The version being installed is competition style, i.e., comes with a switch that disables cockpit AC for max intercooler chilling. I figured this best because I rarely use the AC anyway, there's no reason for me to freeze just to get the blower chilled. Below is the freon/water heat exchanger. Mine is the bigger one on the left. The one on the right is for GTO and Camaro applications.

Methanol is primarily for the increase in effective octane rating as well as cooling the air inlet charge. The Stage 3 Boost Cooler® chosen is one of the best for accuracy and adjustability in water-methanol injection systems. This system features an LCD display with on-the-fly adjustability. The software creates a delivery map based on boost or EFI signal from just a few easy to set points you punch in from the drivers seat. I like this one because the LCD Screen displays boost pressure, fuel injector duty cycle, as well as water-methanol injection percent. Since the XLR has no boost gauge, this alleviates my having to get a gauge stack like Bob's. Quick, easy, positive adjustments are made with 2 push buttons. Low profile design allows for easy-to-view and discrete mounting inside the instrument cluster just above the DIC.

As usual, we already run into a few snags. Since there is no intercooler coolant tank, we've had to go with a larger freon/water heat exchanger. The larger exchanger barely fits in front of the wheel well after we had to move the transmission cooler to the front of the radiator. The Meth kit will use the windshield wiper fluid tank so the headlight washer pump and hoses had to be disabled/removed and that line out of the tank now feeds the injector pump.

In moving the transmission cooler, my mechanic found the transmission fluid was, well, lets just say drag racing burnt the life out it. Now I'm looking for a bigger trans cooler and the trans fluid needs to be flushed.

Once these mods are done, we'll dyno it against the current cruising tune to log ICWT, IAT, and IAT2 so I'm comfortable to drive it home. Then Wait4Me will dyno tune it again to dial in the meth and get all the horsepower available.

I just hope I'm lucky enough to get this accomplished in a couple weeks so I can join the MM gang at Sebring and then stay the next week to see the Team Cadillac racing in the Streets of St Pete.