slowfive0

Diesels are pretty amazing really. The newer ones kind of suck because of all the emissions equipment they've been saddled down with, but when properly modified, they make a ton of power and get surprisingly good economy. About 5 years ago, I was at the track and a Silverado 2500 4X4 Ext cab model made a pass. Went 13.90 IIRC. I was like damn, that's pretty good. Next pass was 11.90!!!!!!!! I was like "WTF"!!!! That was spraying propane and nitrous, but still surprising. There are a lot of guys running 12's and 13's no problem with great fuel economy to boot. There are also the crazy ones like Chase going much faster! I like them, but I can't justify it at this point. I think a nice 408 or maybe larger ls motor with a TVS2300 will fit the bill quite nicely. Hopefully fuel economy is in the same range --- lol!

I hear ya, just saying. One thing that is actually hurting me the most is the stop and go with the stall. I guess it is what it is. I have 170,000+ miles now and will be doing a new engine soon. Thinking I may build a stroker and tone down the stall a bit. Might hurt it a little in the 60 foot but will be a better compromise with the city driving I do. Now, that is what I was looking for! Real world numbers and what better then the same person with 3 different trucks---lol. Thank you. Interesting results.... The 17mpg diesel example was two diffferent trucks of friends that are tuned and have bigger exhausts and cai. That is a best case/easy driving city number. They each get over 20 on the hwy. Best part is they get similar fuel economy to my truck towing! LOL! But they aren't as fast, cost way more initially & have much higher maintenance costs.

If we all had your attitude, we would all still be running around on horses. Dreams can become reality you know. God bless.

My 2wd Silverado had 3.73's and actually did better in city then my friends similar truck with 3.42's. Of course on the hwy he could get 21 if he really babied it. Higher compression actually helps fuel economy but the bigger cubes doesn't so kind of a wash. I think the extra weight and mainly the AWD is what really kills these in the economy department. That's not fair. I'm not saying I want 40 mpg, I'm saying that 12 mpg sucks! I drive 30,000 miles a year! Hell many of you don't even have 30,000 miles on your trucks because you use them more for pleasure vehicles (obviously not everyone). If I got 16 in city, that would be a HUGE improvement. I bet a 2wd version could get 15-16 in city. Anyone have one and if so what are you getting? To a point. The newer trucks actually get decent fuel economy compared to these and their powertrains aren't all that different. 6 speed seems to help quite a bit and being able to turn the 4wd off has to help---lol! There are a ton of mildly warmed up diesel trucks (wayyy heavier) that get 17 in city and run out quite well. But then you get into the higher maintenance costs and it evens out a little. I'm with you there. I love being able to run low 12's and take out most vehicles I run into on the streets yet still get stock like fuel economy when I drive good. Of course the utility of the truck and room (I'm 6'8") really helps too! They are bad ass!!!! I'm hoping they bring a new SS version out in 2014.... ;-) Holy crap! 16.2 city? Or all around? Heavy "footed" driving? Or heavy stop and go?

Maybe so, but my other truck (2wd ext cab silverado) got 17 in the city and 20 on the hwy. Huge difference. I do love the AWD though since I live in MI. Just wish I got 15 in the city and 19 on the hwy.

I've seen all kind of results on this topic, but my fuel economy hasn't been all that great (12 city). If I drive it like there is an egg under the pedal (pretty hard for me lol) I can get 14 in the city. Hwy is all dependent on what speed. HUGE difference from 55 - 75. 55 will get me 17-18. 70ish more like 15-16. Much higher then that and it drops off fast (13-14). I really thought my tune was way off until I seen this article. Now I feel much better----they just suck on fuel economy - lol! http://www.caranddri...est?redirect=no

Dealer can get you one, but IIRC, they are about 600 buck! Also, I would be willing to bet that your problem is the chain jumping the sprockets vs the viscous couplling. Good luck.

No doubt!!! I seen one of them the other day with a big Livernois sticker across the window and big and littles. Had cams and a gear. I WANT ONE! LOL

Does great, but you have to replace the valvesprings (that was done on mine). Stock idle --- love it!!! Great move to do trans first. To original poster, one of my friends son was out at Lapeer last year and went 12.44 with a bone stock 2012 mustang!!! WTF, that seemed unbelievable how fast these cars are. It was dark blue and he did a lot of testing out there last fall in the cool air---not sure if you made it out or not and maybe seen him.....

No motor work other then GT2/3 cam. Previous owner did some trams work (????) and when I got the truck (@70,000 miles IIRC) the trams wasn't right. The truck was detuned and had heavy torque management. I tried to remove some of that and it immediately would slip on the 1/2 shift. Shortly after, bought a used performance trans around 100,000 miles and did ok but I ended up having some issues with it and pulled it for a rebuild. Had a local guy who built the glide in my race do the trans. He did a really. Ice job and it's been in there for 30,000 miles or more at my current 12.20 power level. It has billet input, output shafts, bigger spray, clutches, servos etc. pretty much the works and has been great. Trans will be your issue like everyone else so do it right the first time. Good luck.

First off, nice kill!!!! :-D 2nd, Pulley that sucker down!!! 170,000 on mine (2.8 pulley) and it loves it! Let it eat! ;-)

No problem. These are a really nice kit and I'm sure u will love it once u figure out ur problem.

What I said about the wiring insulation damage should be present on all the pins that have been soldered or sealed with the heat shrink and isn't an issue. That said, I'm thinking that is all ur experiencing with regards to the overheated harness and that your problem is a sticking relay. A few things to look at though: 1: make sure fans are programmed to run correctly; i.e. not running where thermostat is still closed or partially open, etc. that could "potentially" cause the relay/wiring to overheat as the fans would run almost continously. 2: control wire (dk green or blue) shorted. I'm sure u didn't screw anything into the box so just make sure no wires are melted/pinched together 3: ck for signs of corrosion. Green, white or in some cases kind of a gray ashey look. U may see some in and around the connector but u want to look at the actual pin and it's corresponding female mate. If water and especially salt u could get corrosion and the corresponding resistance. This would equal heat and potentially ur problem. U should see obvious signs though. Not just a little surface damage on insulation. Post some better pics of all the wiring. Especially, the large wires. Good luck.

Driving down 696 in Detroit area tonight and ran into this yellow regular cab Silverado. Sounded really good---was fun! Anyone on here own or know anything about it? Thanks.

Agreed with all of the comments above. Mr. P has been nothing but 100% stand up to me as well. I also have one of his kits which I have about 1 year on and approximately 30,000 miles on. I couldn't tell anything from the pics. Seemed out of focus or fuzzy. I can tell you that i had a problem (my own fault) and I was in the box to troubleshoot it and I can tell you this. Many of my wires showed signs of heat damage (right at each pin) as many (if not all) had been soldered after being crimped. I bet that is what you're seeing and I wouldn't worry about it if so. Post some better pics and we can all take a better look. Good luck and I'm sure Mr. P will take care of you. He is a busy guy like all of us.

Any updates?

Ok, reality and my good sense is starting to kick back in (for now.....LOL!) http://www.silveradoss.com/forums/topic/73340-promising-times-at-the-track-with-the-radix/page__pid__836003__st__15#entry836003

Made it back to the track today (42F, 65% humidity, 30.02). With my base tune (conservative tune/no meth inj) truck went 12.22 at 110 right off the street! Temperatures were a little warmer, but similar to when I ran the 12.21 at 110 back in 2010 however that pass was with a very aggressive tune. Only differences between the two outings is now I had the conservative tune, electric fans, 90mm tb, homemade cai to my Volant airbox, and I got rid of the flowmasters and replaced them with straight through mufflers......6 of them! LOL!!! I played around with my methanol injection and aside from being able to run more timing without any knock and obviously controlling IAT's, didn't see much difference. Could hot lap it and maintain consistent performance, but not much gain. I would say maybe a tenth/1 mph gain if that.......Tried to be very scientific about my testing to get good results that would allow me to say that "Test B" definitely improved over "Test A", but had a hard time due to oil downs, people jerking off in the lanes, etc. Overall, I'm pretty sure I would pick up a little with the Methanol and tune dialed in for kill, but not worth the gains imo. Probably the biggest pro for the methanol is if I decide to make hot laps when at the track---especially in the summer. I'm not going to kill myself over this crap anymore. The truck is a complete BLAST to drive and drive it I do! It now has 165,000 and is great. I ran a ton of mustangs, camaros, trucks, everything today and did awesome! Maybe lost one race and that was due to them getting the jump on me (red light). It was a lot of fun and met a ton of really cool people today. Really nice to drive your junk to the track, pull in and rip off your best pass of the day and come back to the pits with the stereo bumping just j/k about the bumping part lol! I think I'm going to keep this truck fun and drop my ideas of twin turbo this, 1500hp this and what not and just build this basic combo better. Thinking either a 390, 408 with my existing block or the same crank setup in a bigger bore block for a few more cubes and better breathing. Some good heads, TVS2300 and call it a day. Should run bottom 11's (maybe high 10's) in the good air and mid 11's the rest of the time. If I can pull that off and keep it similar to what I have now (maintenance, driveability, etc), then I will have succeeded. Seems it has already been done by a certain tuner in AZ and guy in Canada.... Hats off to them and thanks for the paving the way. Now I just need to start saving my pennies. P.S. The coolest thing at the track today imo was this ford flex. He had a tune from Livernois, some lighter wheels, methanol inj, and some better flowing exhaust components. Went 12.94!!!!!! He was beating up on camaros, mustangs, etc all day! Couldn't help but laugh to myself at a few of those races---they didn't know what hit them! LMAO! Sleepers RULE!!!!

Driving home tonight and I was paying closer attention to the boost/vacuum gauge. At 80mph at steady throttle/flat ground it was running right at 10" of vacuum. A slight grade reduced it to 8". I rolled into the throttle gently and I had 5psi of boost almost instantly! Nuts!!! That was one observation. The other observation was how nice this drives at cruise with the converter locked up. I was rolling along in 4th gear (converter locked) at around 2000rpm and had to slow for traffic (never hit brake), as I rolled back into the throttle a little (converter still locked) I was at about 1200rpm. The GT2/3 cam is so smooth and the radix makes so much torque that it can pull down that low pretty nice at light throttle. Giving it some throttle it pulled smoothly and gained rpm at a nice rate. I can only imagine or maybe I can't (LOL!) how a tall deck motor in the 454" range with great flowing heads and either a TVS2300 or Whipple or Turbos would feel. The 454" alone should pick up the torque in the neighborhood of a 100 ft lbs just from the cubes I would think. Obviously, what power adder, heads, cam, etc will dictate the power band and what not, but I would imagine that I could pick up a TREMENDOUS amount of power all across the range. The way it drives now is nice, but I bet it would be INCREDIBLE with the big cubes and the right combination of power adder....... Ahhh, day dreaming up different combos and planning is half the fun of this hobby. Regarding the video from Wegner Motorsports (see below) where they make 1000 hp, IIRC the guys I spoke to said it is actually a tall deck RHS motor in the 441" range. The big cubes weren't necessary, but that is what the customer wanted. They had it iced down, were spinning the shit out of the blower and were running race gas to get those numbers, but impressive nonetheless! What really impressed me on this combo was the torque down low. OMG!!!! Are you kidding me----that torque would move mountains!!! Thoughts? Surely someone has done a big bore/stroke TALL DECK motor with excellent heads for one of these trucks??????? With boost of course

Thanks Zippy! Being as I plan to run boost in the future I obviously don't want to go to crazy with the stroke. I'm thinking 4.125" bore x 4.250" stroke = 454" or something in that vicinity. I think that will probably be the max stroke I will want to run especially with thoughts of future forced induction plans. I think the additional stroke and bad ass heads will result in an amazing street engine though----Thoughts? I really like those pro heads from WCCH. $3500-4000 but they look to be the hot ticket! Or maybe some MAST heads.....Thoughts? I agree that the head will probably make or break this combo. I will need to spend the dough and go big or just go 408 with more conventional parts! LOL! Another area of concern whether I stay NA or go turbo is the intake. It seems like none of the intakes out there are adequate for these big cube monsters..........Since I'm not going for all out records or anything, I'm leaning towards that LSX102 truck intake. Not sure if it is compatible with the heads I'm looking at though. Maybe only compatible with the cathedral port heads which then adds another issue. If I go with the TVS2300, then I'm concerned about the blower being a restriction (sort of like a radix on a 408/427).......... Thoughts? Either way, I think a 408/TVS 2300 or 408/Turbo combo would be bad ass! I can't imagine how a big cube combo would be with regards to that "area under the curve". The torque should be up everywhere which should make for an amazing daily driving experience!!!

Oh, that makes more sense. I think Precision was already using the heavy duty hubs (diesel vintage maybe??) so it didn't make sense that theirs were breaking and no one else as most of the converter manufacturers buy those parts and then build their owned tweaked units. Thanks for clearing that up. Sorry for getting off track on this. Keep tweaking at that thing man and it will go even faster Nice way to start out the season

One other point about the Vigilante converters. I ran a triple disc unit in my mustang and loved it! The only reason I didn't buy another one when I did my trans in the sss was because of a lot of reports of broken hubs. Were those cases flukes or other problems not related to the converter or did Precision fix the hubs?

Thanks for the informative reply Zippy. Great perspective on this topic. One thing I notice right now with my combo is that at hwy speeds, the fuel mileage just SUCKS!!! It is soooo close to going into boost at 75-85mph it isn't funny. Don't get me wrong, I can easily keep it out of boost, but very little throttle will put it near 0" and my fuel enrichment as you spoke up kicks in and it's super fat. At those speeds, I'm running around 10" vacuum at steady throttle/flat ground. At idle, I see around 15". I'm thinking some of this is due to the small blower pulley spinning the blower up so fast, but........I'd really like this engine to move this truck around a little easier (especially out on the hwy) it is my daily driver after all and sees a lot of miles! Seems to me, that a longer arm (stroke) will fit this need....... So, what you're saying is in my case (not doing crazy amounts of towing usually) and not trying to make 1500hp, I would be better off with the 4.0 stroke over the 3.8.....That being said, it seems like a bigger stroke might be right up my alley. Thinking an LSX tall deck with a 4.25 stroke and some pro heads. Then down the road some sort of forced induction on top of that Thoughts?

I'm with you. I agree with his comments on the bigger stroke but then my mind really starts to wander. If 4" is good, then how about a tall deck with 4.25" of stroke and some really good heads...... Makes sense to me - lol! I had a local guy (Reiter) update my cage to 25.5 over the winter. Diamond is making custom 2" - 2 1/8" headers for it right now. Once that is done (probably this week) he is going to begin fabbing the intercooler tubing. 4" tubes will be run into the passenger compartment (intercooler is mounted where the rear seat used to be). Then, I can final assemble the motor and get it on the dyno. After that, install it and plumb the car. Needs a little patching to the electrical and some other misc odds and ends like the parachute, paint cage, etc. I was hoping to have it running for the 1st heads up race at Milan but due to money and time, it will probably be more realistic to shoot for later in the season....Sigh. I had it running in 07 and thought what the hell, might as well upgrade the C-4 for a glide, upgrade the D2R blower for an F2, then go from side slinger to crank drive blower, then motor plate, chassis update, hell might as well go intercooled now.....and the rest has been down hill ever since! Ck out my photobucket---bunch of crappy pictures, but better then nothing I guess. I took a bunch that really sucked before I realized my cellphone protector/cover that was covering up the camera lense was all scratched up and cloudy!!! WTF, lol! http://s744.photobucket.com/albums/xx87/slowfive0/Mustang/ Do you have any info/pics of your project? I would love to ck them out. I hear ya on the weather----man they love this cold air. Track opens this weekend---I'm hoping it's 35^!!!! I'll be out there if so-- You get any further with your truck since we last talked? I think it needs a TVS

http://ls1tech.com/forums/forced-induction/1359652-aes-390ci-now-callies-dragonslayer-crankshaft.html Anyone run a 390" combo in a truck/suv? Specifically, a forced inducted application?