How necessary is tune after H/C/I swap?
#1
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How necessary is tune after H/C/I swap?
Im finishing up my HCI swap on my 2001 LS1.how necessary is it to get a tune after this? Will my car run like crap if i dont get a tune? What other problems can i have without a tune?
Here are my mods
Stock 799 heads
228R cam
LS6 intake
Ported TB
Thanks
Here are my mods
Stock 799 heads
228R cam
LS6 intake
Ported TB
Thanks
#2
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Not a good idea to run the car long at all without a tune (like drive it to the place to get the tune). The car will run and be drivable but the air/fuel ration will be all over the place either too lean or too rich with different loads and throttle positions. This can cause cylinder wash down from too much too and valve overheating from running too lean. Get a tune asap to be safe!
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Mandatory
You have to retune. The changes are tremendous. Do you have any type of software to do your own tuning? You can do these changes yourself and I recommend HP tuners. I've been using LS1 Edit because I bought it years ago but this is very limited compared to HP tuners.
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#8
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The only guy that does tunes around here is about 20 min from here,besides him,the next guy is about 3 hours away.
How safe is it do a tune without a dyno and wideband?
What about a Frost mail order tune? Safe?
I dont have a wideband hooked up,and idk if he does.theres no dyno in my area either.
Thanks
How safe is it do a tune without a dyno and wideband?
What about a Frost mail order tune? Safe?
I dont have a wideband hooked up,and idk if he does.theres no dyno in my area either.
Thanks
Last edited by lm38330; 02-10-2011 at 09:56 PM.
#9
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Frost
I would trust a Frost mail order tune because he appears to be a very knowledgeable tuner and very professional to deal with. It appears he has tuned quite a few cars and he should have a tune that would get you in the right ballpark until you can arrange for a live tune. He will be able to tell you for certain. I received a mail order tune for a car equippment nearly identical to mine and it made a 200% difference in the performance and I would never have been able to figure out the right changes by myself no matter how many hours I spent adjusting things. The less modifications you have made the closer to ideal your mail order tune should be.
#10
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Local Tuner
Make certain what the tuner offers before you take your car to him, since anyone who owns the software and even some like myself who are shade tree tuners think they know more than they do.
The wide band and load bearing dyno is the best approach, however some effective tuning can also be done on the street with the right approach.
Bottom line, the guy has to know how to tune MAF, VEs, timing curves, idle fueling, and PE verses RPM and how to analyze the data they log during the tuning process. It is not easy but it is not rocket science either.
Ask some questions about what you would be getting and if there is a guarantee that the tune will result in a car that does not buck, surge, die, or otherwise ends up with unacceptable driveability. You want turn of key starting at the appropriate idle RPM without touching the accelerator pedal.
There are 100 hacks out there for every good tuner and Frost is is not a hack based on his results and reputation on this forum and others.
The wide band and load bearing dyno is the best approach, however some effective tuning can also be done on the street with the right approach.
Bottom line, the guy has to know how to tune MAF, VEs, timing curves, idle fueling, and PE verses RPM and how to analyze the data they log during the tuning process. It is not easy but it is not rocket science either.
Ask some questions about what you would be getting and if there is a guarantee that the tune will result in a car that does not buck, surge, die, or otherwise ends up with unacceptable driveability. You want turn of key starting at the appropriate idle RPM without touching the accelerator pedal.
There are 100 hacks out there for every good tuner and Frost is is not a hack based on his results and reputation on this forum and others.
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I would trust a Frost mail order tune because he appears to be a very knowledgeable tuner and very professional to deal with. It appears he has tuned quite a few cars and he should have a tune that would get you in the right ballpark until you can arrange for a live tune. He will be able to tell you for certain. I received a mail order tune for a car equippment nearly identical to mine and it made a 200% difference in the performance and I would never have been able to figure out the right changes by myself no matter how many hours I spent adjusting things. The less modifications you have made the closer to ideal your mail order tune should be.
#12
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You are fine to start it and drive it. Just don't go around town giving it full throttle. Not starting it and hauling it to the tuner in my opinion is just silly. The car is going to need to have all of the air bleed out of the cooling system and among other things ie exhaust leaks, air leaks etc etc.
#14
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so i live about 2 hours north of seatle and that is the closest LSX tunner that i am aware of (ellis) and that is who i would like to go to. after my heads and cam swap i was gonna go over there so he could port match my FAST 92 to my new heads and do a dyno tune. would i be able to safely drive it on the freeway for an hour or two to get it there for a tune?
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so i live about 2 hours north of seatle and that is the closest LSX tunner that i am aware of (ellis) and that is who i would like to go to. after my heads and cam swap i was gonna go over there so he could port match my FAST 92 to my new heads and do a dyno tune. would i be able to safely drive it on the freeway for an hour or two to get it there for a tune?
#18
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Did you upgrade/change your fuel injectors? That is one of the paramount questions on running with a stock tune. I wouldn't even attempt to drive it or even start it if you did change them. I mailed my PCM to the tuner, got a safe baseline, got it back then drove 2 hours south to Columbus for a full tune.
If the guy is local and only 20 mins away, see if A.) He can come to your place to do a baseline tune to get you rolling or B.)Take you PCM over to him and have him upload a quick baseline.
It's still safe. Without a wideband it can be done, but this is critical information your tuner needs to get the best possible tune. As far as the dyno, my tuner did 95% of my tune on the street then tweaked it on the dyno. Dyno is not a big thing if finding one local is going to be a song and dance.
If the guy is local and only 20 mins away, see if A.) He can come to your place to do a baseline tune to get you rolling or B.)Take you PCM over to him and have him upload a quick baseline.
How safe is it do a tune without a dyno and wideband?
#19
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Did you upgrade/change your fuel injectors? That is one of the paramount questions on running with a stock tune. I wouldn't even attempt to drive it or even start it if you did change them. I mailed my PCM to the tuner, got a safe baseline, got it back then drove 2 hours south to Columbus for a full tune.
#20
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yea i am going to 36lb injectors...and when i did my diablo tune, my brother actually did it, he is now in texas. so call the tuner, take my PCM over there for a baseline tune and then drive it there? now when you were talking about wideband, do i have to provide the wideband or will a good tuner provide it? i am going to Ellis in Seattle WA
As for the wideband, most tuners have there own wideband and equipment. My guy had me go to an exhaust shop and have a bung welded into the side of the header collector to get the most accurate reading. If you don't want to do that your tuner can clamp one onto the end of your exhaust pipe, but with cats and being further downstream from the engine the readings are not nearly as good as right in the header.