im thinking that the next mod for the truck is going to be a tune. not too sure what to get. any suggestions?
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im thinking that the next mod for the truck is going to be a tune. not too sure what to get. any suggestions?
muawhahah nelson 93 tune DUH
why the 93 tune??
whats the difference between the 87 and 93????
or even the dual 87-89 or 91-93??
im so confused
93 is where you'll get the most power, and imo if your gettin a tune done, you better get everything you can outta your truck for the money...and definately go with nelson...I raced a truck pretty similar to mine with a nelson tune and mine having the diablosport "canned" tune and the other truck pulled me pretty good.
the 93 will give you more power, and hopefully better milage than an 89, at least thats my understanding
so the 93 will give you better Fuel economy than the 89?
generally, the better the fuel, the better the milage
Not sure about that.
I'd say for sure that if you get a lower octane tune and run higher octane fuel, you'll get worse mileage. That's what happened when I used 93 with my current tune.
I am retuning for 93 soon (maybe this week). On a vehicle like mine (my wife's) that goes 7K miles per year, the extra power is worth $0.20 per gallon even at the HORRIBLE mileage a 6.0 AWD utility gets.
Higher octane than the tune level does not offer any power but reduces MPG. Lower octane than the tune loses big power and could hurt the engine after enough time and abuse.
ok that all makes sense now.
i see some guys on here with speed density tunes....what is the difference??
oh and what about a live tune??
thanks so much for all the input from everyone
Speed density refers to using qualified logarithmic tables for fuel and spark delivery instead of the computer adapting to a lot of sensor information. I guess this is done in radical situations or strip only applications but someone else here knows a lot more of the whys for speed density tuning than I do.
A live tune refers to modified fuel and spark delivery custom made using information gathered from your specific vehicle (either on a chassis dyno <also called a dyno tune> or on a safe section of road) to optimize the set up. The loose opposite is a mail order tune where a tuner uses safe averages and manipulates a PCM that is sent via the mail, etc. for installation by the end user with canned parameters.
Does that make sense?
yeah that makes sense.
live tune is best for everyday, mail order is good, speed density is good for racing.
now how can i get a live tune from nelson if im in az???
Take a long vacation.
You also always wanna call and set an appointment first for a live tune no matter who you get to do it. A waiter out of the blue for something so intricate and important doesn't make most people very happy.
My mail order is just fine but it's also getting changed soon I think to get a little more out of it.
FWIW, speed density tuning is not for racing only. GM used to speed density tune the Corvettes and Camaros. My 93 Corvette LT1 engine was speed density tuned from the factory, no MAF sensor in the airstream, and ran like a bat out of hell. The engine is still running strong in my buddy's truck out in Greenville with the same exact tune I ran in it starting back in 1995 and it hasn't had to be retuned since.
what are the advantages of speed density?
I just meant on anything current since no OEM to my knowledge has used SD for a while. F*** converted the 5.0 in 1987.
If it has a MAF, it's not SD.
I'm speed density tuned and use my truck as my DD. It all comes back to the tuner. To answer your question, typically a SD tune is used when you have some sort of forced induction (but can be for N/A vehicles as well) and you use a 2 or 3 bar MAP sensor that will add fuel based upon the amount of boost pressure. At some point your MAF sensor will reach its limit on how much air is passing through it. Tuners can still tune using a MAF that is over its limit, but you can dial in a little better with a SD tune. As far as daily driving with one, it comes back to how good your tuner did setting it up. I had Nelson do mine and it feels smoother than it did with the MAF tune.
A live tune is definitely best, but if you can make it there for a while, get a mail order in the mean time. :twocents:
ive got speed density on mine and its just like ramair said. Its a little easier to figure out exactly how much air and fuel to add, timing, etc.Quote:
Originally Posted by ramair2002
right on. so is the speed density something i will have to take a vacation for? is there any difference in the prices of a live vs. speed density tune?? what about the difference with either and the mail order? who would you say is the best for sd tunes?
A local tuner is best for SD tuning. Most shops that do Fbody performance tunes can SD tune a truck.
Mine is a 89 tune, allen tuned it up, said he got more timing from 89 then 93 but thats just me. Just get a nice live tune an let the tuner decide what is best.
i dont know if you will reap as many benefits using a SD tune when you are n/a vs someone like me who has forced induction I guess. Thats what i hear
I agree, with your mods you don't need a SD tune.
ok cool. its not like i cant get a sd tune if i ever do go F/I. but one thing i am really wondering is like the approximate price for a live nelson tune and/or a mail order 93 tune from nelson? and if i do decide to get a mail order for now will i have to pay for another tune and all that when/if i do get it live tuned?? that hardly makes sense to me....but would i be basically spending twice the money i guess is what im trying to ask?
once you get one tune. you get free retunes. Once you get major power. i.e. cam nitrous/FI then he will charge you like 125 more. But thats it. you can get a mail order tune, drive it down there and get a retune for free
right on!!!!! i didnt realize that they did that. thats friggen sweet of them. whats the approximate price for the mail order?? i saw the web site and im not sure which one i need.......its a 99 but i cant remember if its a nbs or obsQuote:
Originally Posted by duckysbht
http://i175.photobucket.com/albums/w...2/OBSChevy.jpg Old body style $250.00
http://i175.photobucket.com/albums/w...2/NBSChevy.jpg New body style $375.00
since you have a 5.3, you have a new body style.
thats what i figured but what do i know. im a friggen retard.
so ive also seen some guys with hp tuners and what now...what the difference with them and what nelson does???
with HPtuners you can tune it yourself. There is alot to learn about tuning to do this.
you could also have nelson tune it and get hptuners, then you can scan your truck after the tune. Then you would send this scan back to Nelson, he will adjust the tune and send it back through email. Then you you upload the new tune. This is the next best thing to a live tune. This is what I do.
Nelson uses HP Tuners to tune our trucks. It takes A LOT of learning, time and patience to do this on your own. There are quite a few guys out there who can give you pointers and answer your questions about it, but if you are just looking to get the most out of it and not worry, Nelson's the way to go.
im just a little too busy...more like lazy...to end up doing it all on my own. if i can get one of the best in the biz to do it for me then why waste my own time and screw it up and blow my motor up?? how does it work with getting the hptuner and sending it back?? do i have to pay for both or just the standard tune price?Quote:
Originally Posted by ramair2002
sorry for all the stupid questions i ask. i just want to know exactly what im getting into before i do.
You don't send anything back with HP tuners. What I meant by Nelson using HP to tune our trucks is that Allen actually uses that program to adjust the parameters within our PCM's. If you get a mail order tune, then you will get an already tuned PCM in the mail and you send your stock PCM back. Nelson already knows what parameters to adjust based upon the mods that you have done to your truck.
It sounds like you are like a lot of people, including myself, in the sense that you don't have the time or willingness to try and do it yourself. I agree with letting the pros do it and probably have it done better than I ever could.
Ask all the questions you want, that's what this site is for!
what about what hes sayin?? like i buy an hp tuner scan it at home after i get my mail order from nelson, send him the codes/diagnosis from the hp and then have him adjust it???
that seems like a lot of work
Quote:
Originally Posted by foggy
You can do that and it would be a very accurate mail order tune since Nelson would be able to view actual logs of how your truck is reacting to his tune allowing him to make minor tweaks to get it dialed in. You would record runs in your truck with HP called "logs" and email them to Nelson to look at. Nelson will then make adjustments and send back to you to upload in HP and into your truck. The down side is you have to buy a tune from Allen + HP Tuners but it would save you a drive to Allen's shop. Plus, I'm not sure how many times Allen will send files back and forth before he starts charging you for them. That would be something you would have to work out with him.
Doing it this way you have to buy the tune and hptuners.Quote:
Originally Posted by bangbangskeetskeet
Sending the files back and forth to Nelson is simple.
that makes sense now. how many times will he give me an updated tune?
like will he do it every time i do a new mod? what about if/when i decide to go F/I??
I think he will start charging again if you keep sending going for retunes for small stuff. So like install a pretty good amount of stuff. i.e longtubes/ORY, or gears/stall and then go get a retune. Know what I mean?Quote:
Originally Posted by bangbangskeetskeet
I think he will do around 3 retunes per year for no charge (other than shipping if it's mail order). Once you go FI, you will just need to pay the difference.
Nelson will do what it takes to get your tune right, and then some. You will kick yourself in the azz if you go with anyone else. Nelson has done for me what no other tuner in their right mind would do. Trust me if it is not right on the first time I would be suprised, and if it is not he will do everything within his power to make it right.
B