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post #1 of 31 (permalink) Old 12-13-2012, 09:16 AM Thread Starter
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Tuning Question

Ok, I am donig a lot of work to my cobalt next month and the location where I am having everything installed ie my garage is about 3 1/2 hours from where I am getting the tune done. I am installing as follows... Header/DP/Res/#50 Injects/2.8 pully/HE....I already have a GM stage 2 tune. Would it be safe to drive it those 3 1/2 hours to have it tuned?

thx in advance

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post #2 of 31 (permalink) Old 12-13-2012, 09:23 AM
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Umm, maybe. The injectors is what I'm looking at that isn't sitting well with me. If those injectors aren't scaled in correctly, they could dump a whole lot of fuel in your car (a. giving you really bad gas mileage. b. giving you possible too rich knock. c. giving you a flooding situation). Anytime you do new injectors, it is HIGHLY recommended to get tuned on the spot. If I were you, since the LSJ injectors are MUCH easier to install, get your parts put on besides the injectors, don't boost the 3.5 hours to get back where you are getting it tuned, then put the injectors in when you are tuning it. That is my suggestion, it will save you a big headache in the long run. You will be safe running those upgrades with the stock injectors as long as you don't boost it fully or hard.

Just remember, the computer doesn't know how big your injectors are, that's why you have to tune it, and with your GMS2 tune on there, it is saying to put out 90-100% IDC (injector duty cycle) with your 42# injectors, for x amount of ms's. now if you were to put in your 50# injectors, the computer is still going to say put out 90-100% IDC for x amount of ms's on those, those causing you to push more fuel than you need to run. Catch where I'm going here?

I know it's not a big difference from the 42# to the 50# injectors, but that difference is enough to possibly worry about.

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Mods - Injen CAI, CIA MAF Relocate CP's, Dejon FMIC,
Custom 3" DP, 3" Exhaust, GT3076R, Pioneer AVH-4100DVD, Hurst STS, ZZP triple pod, Autometer Cobalt boost/DPIC/WB gauges, Nitto NT05 245/40/18's, H&R Springs, 80:20 Meth Spray
Future - KSport Kontrol Pro Coilovers, 10% Tint, FMIC spray
538whp/501wtq @38 psi on meth and 93 oct on stock ish motor


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Mods - *Updated 10/6/13* AEM TRUboost EBC, 4in custom TBE, SD dual 93/e85 tune, ETS 4in Race Core FMIC, Dual Aeromotive 400lph Fuel Pumps, T4 Tubular Manifold w/ dual WG's, FP Super99HTZ DBB Turbo, GSC 274 mivec cams, ARP headstuds/rod studs, FIC 2150cc Injectors, Aeromotive FPR, Aeromotive Fuel Rail, catch can, Mini Battery Kit, Slim Coolant Fan, Kiggly Racing high pressure valve Springs/Titanium Retainers, Supertech Stainless Steel Valves, Dual VTA Tial 44mm WG's, 4g64 Stroker Manley Pistons, 155mm 2.4 LR Manley Turbo Plus I Beam Rods with ARP 625 Studs, 100mm forged non-billet Manley Crankshaft, Full H/E PNP with Port Matching, Kiggly Racing Girdle, Dual Tial 50mm BOV's, Excedy Triple Disc Carbon HD Clutch, AEM EMS

'95 Ram 2500 Diesel
Mods - 5in TBE, Boost Elbow set to 28psi, Adjusted fuel pump, Open Turbo.

Future Mods- Super Street Clutch (rated @1400ftlbs tq), 67mm turbo, 160lb valve springs, added timing, tubular exhaust manifold, larger injectors, possible 6 spd swap.


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post #3 of 31 (permalink) Old 12-13-2012, 09:39 AM Thread Starter
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Well, thanks for the heads up I will do just that figuring injectors arent the hardest thing to install, Ill wait till I am at my spot. Just wish there was somone closer that wouldnt charge me up the A** to do the work. The shop I wanted to do it in wants to charge me $80 an hour and said it would take 5 to 6 hours to do the install of those parts then 550 for a custom tune... is that reasonable or should i stick with my orginal plan minus the injectors till i get to where im going?

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post #4 of 31 (permalink) Old 12-13-2012, 09:47 AM
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You should install parts yourself, find someone with hpt and save yourself hundreds of dollars

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post #5 of 31 (permalink) Old 12-13-2012, 10:01 AM Thread Starter
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Quote:
Originally Posted by BankerBalt View Post
You should install parts yourself, find someone with hpt and save yourself hundreds of dollars
Yeah thats my thinking here, just the guy that is going to do my tune lives 3 hours away from me...Either way Im sure since he tunes Ill be able to install the injectors there..

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post #6 of 31 (permalink) Old 12-13-2012, 11:03 AM
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$550 for a TUNE??? You've got to be kidding me!? I only charge $150 to tune! Most tuners are only $300 for a custom HPtuners tune. Yeah that's a rip off there. Ask on the forums of here as well as HP tuners to see if anyone can help you. I know there are tuners in Atlanta with HP tuners and they would be more than willing to help and charge you less for the tune.

'09 SS/TC - Stolen
Mods - Injen CAI, CIA MAF Relocate CP's, Dejon FMIC,
Custom 3" DP, 3" Exhaust, GT3076R, Pioneer AVH-4100DVD, Hurst STS, ZZP triple pod, Autometer Cobalt boost/DPIC/WB gauges, Nitto NT05 245/40/18's, H&R Springs, 80:20 Meth Spray
Future - KSport Kontrol Pro Coilovers, 10% Tint, FMIC spray
538whp/501wtq @38 psi on meth and 93 oct on stock ish motor


06 EVO IX MR/SE - Sold
Mods - *Updated 10/6/13* AEM TRUboost EBC, 4in custom TBE, SD dual 93/e85 tune, ETS 4in Race Core FMIC, Dual Aeromotive 400lph Fuel Pumps, T4 Tubular Manifold w/ dual WG's, FP Super99HTZ DBB Turbo, GSC 274 mivec cams, ARP headstuds/rod studs, FIC 2150cc Injectors, Aeromotive FPR, Aeromotive Fuel Rail, catch can, Mini Battery Kit, Slim Coolant Fan, Kiggly Racing high pressure valve Springs/Titanium Retainers, Supertech Stainless Steel Valves, Dual VTA Tial 44mm WG's, 4g64 Stroker Manley Pistons, 155mm 2.4 LR Manley Turbo Plus I Beam Rods with ARP 625 Studs, 100mm forged non-billet Manley Crankshaft, Full H/E PNP with Port Matching, Kiggly Racing Girdle, Dual Tial 50mm BOV's, Excedy Triple Disc Carbon HD Clutch, AEM EMS

'95 Ram 2500 Diesel
Mods - 5in TBE, Boost Elbow set to 28psi, Adjusted fuel pump, Open Turbo.

Future Mods- Super Street Clutch (rated @1400ftlbs tq), 67mm turbo, 160lb valve springs, added timing, tubular exhaust manifold, larger injectors, possible 6 spd swap.


Master ASE Certified Gasoline/Diesel Technician since 2004

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post #7 of 31 (permalink) Old 12-13-2012, 11:04 AM
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Typically I've seen around $350 for two to three hours on a dyno and tuning around here.


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post #8 of 31 (permalink) Old 12-14-2012, 08:06 AM Thread Starter
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Well, if I can find a HP tuner with and dyno close to Valdosta I would go for that.. Most the guys I have talked to can do it but its a street tune..Looking to stay on a dyno.. So if you know anyone in North Fl that would be great!

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post #9 of 31 (permalink) Old 12-20-2012, 03:46 AM Thread Starter
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Ok another tuning ?....I am going to wait on the Injecters and pully. My ? is I already have a GM stage 2 tune after adding the header and catted DP do I need to tune it all over again? Will I still see gains even if I do not tune it after those add ons, or do I have to tuen it again?

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post #10 of 31 (permalink) Old 12-20-2012, 05:17 AM
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you will not see the full potential of your mods unless you tune for it. you'll see some small gains maybe

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