C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Tuning Chips?

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Old Jul 22, 2015 | 01:39 PM
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Default Tuning Chips?

Another question for the day since I'm in a Corvette mood. I see tuning chips all over the place on Eckler's, Amazon, Zip. Do they actually make any noticeable difference? If you recommend them (which for some reason I doubt) which would you recommend. I am trying to keep my corvette as stock and original as possible while milking it for some fun performance.
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Old Jul 22, 2015 | 01:42 PM
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Originally Posted by RiponCorvette
Another question for the day since I'm in a Corvette mood. I see tuning chips all over the place on Eckler's, Amazon, Zip. Do they actually make any noticeable difference? If you recommend them (which for some reason I doubt) which would you recommend. I am trying to keep my corvette as stock and original as possible while milking it for some fun performance.
There is no need to waste your money. The factory Eprom can handle your stock engine with ease. If you are going to purchase a tune upgrade. At least get this done on a Dyno.

Last edited by THE 383 admiral; Jul 22, 2015 at 02:04 PM.
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Old Jul 22, 2015 | 01:51 PM
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I have an extra ECU for my car. Can I send it in to get tuned for lower fan temps and maybe a little more timing or is that all contained on that prom chip?
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Old Jul 22, 2015 | 02:01 PM
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all within the actual prom carrier. The factory uses UV to update the Eproms. The upgrade mod would be installing a ZIF socket pressure less install.. along with a EEprom. To flash using a pocket programmer or similar.
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Old Jul 22, 2015 | 02:58 PM
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Generic off the shelf chips are a waste of your money. A custom chip is what is needed for serious mods, but if you don't have any then you won't get anything from it.

If you only want the fan settings changed, they can do that in the chip.
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Old Jul 22, 2015 | 04:25 PM
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I got the fan temp changed, vats turned off and some other mods from a guy on thirdgen.org with a new chip, so I can swap back to my stock. Cheaper than any off the shelf chip.

Last edited by BOOT77; Jul 24, 2015 at 02:25 PM. Reason: dirrrrrrr
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Old Jul 24, 2015 | 02:14 PM
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off the shelf chips for the c4= no

custom burned chips via mail-order or dyno tune= great

As long as you have a few mods worth tuning for..
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Old Jul 24, 2015 | 05:40 PM
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I just posted this up, came back from Dyno with a car I only know to be stock, except someone set the computer to turn the fans on at 185-195 deg, car always runs cool.

Anyways, cats, stock manifolds, glass packs in place of mufflers, no lump in the engine (no cam that I can tell), everything seems stock. 94, LT1, ZF6, pulled 290.1hp and 330torque at the tires! So 15% drive-train loss, thats 340hp and 390t.
If that's what you get custom tune with NO mods, color me impressed. BUT I assume some work had to be done, just not sure what.
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Old Jul 24, 2015 | 06:59 PM
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Originally Posted by volkswagens-for-life
off the shelf chips for the c4= no

custom burned chips via mail-order or dyno tune= great

As long as you have a few mods worth tuning for..
I'm not sure the mail order stuff is good. Better than off shelf? Yes. Worth the money? Not for me. Not unless it is datalogged and they tweak it till there is nothing left to give. Other than that, I am going off your guessing. If I am going to do that, I'd rather learn to DIY and make my own guesses.
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Old Jul 24, 2015 | 08:54 PM
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There are many corrections that can be made to mathmatically correct Open & closed loop AFR. Turn on the fans for better heat protection. Un- restrict a few more RPM's. Cylinder volume injector flow is also mathmatical. But for maximum performance. Not using manditory DataLogs. The results will be minimal or worthless. There are way to many variables. Example a mail order tune. Would never be able to individually adjust my injectors. Balancing via exhaust temp. I'M amazed All of the tables i have corrected with the small amount of simple upgrades on my current stock motor. The results have been very impressive.
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Old Jul 24, 2015 | 09:33 PM
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Originally Posted by Rexracer77
I just posted this up, came back from Dyno with a car I only know to be stock, except someone set the computer to turn the fans on at 185-195 deg, car always runs cool.

Anyways, cats, stock manifolds, glass packs in place of mufflers, no lump in the engine (no cam that I can tell), everything seems stock. 94, LT1, ZF6, pulled 290.1hp and 330torque at the tires! So 15% drive-train loss, thats 340hp and 390t.
If that's what you get custom tune with NO mods, color me impressed. BUT I assume some work had to be done, just not sure what.
Generous dyno. They can make it show more power than there really is. Your car better trap 110+ with that power level.
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Old Jul 24, 2015 | 09:51 PM
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110 MPH is asking alot! Even the 93 ZR1 average is 108.
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Old Jul 24, 2015 | 11:03 PM
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Originally Posted by THE 383 admiral
110 MPH is asking alot! Even the 93 ZR1 average is 108.
The average driver must be horrible. Lol
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Old Jul 24, 2015 | 11:06 PM
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Originally Posted by Rexracer77
I just posted this up, came back from Dyno with a car I only know to be stock, except someone set the computer to turn the fans on at 185-195 deg, car always runs cool.

Anyways, cats, stock manifolds, glass packs in place of mufflers, no lump in the engine (no cam that I can tell), everything seems stock. 94, LT1, ZF6, pulled 290.1hp and 330torque at the tires! So 15% drive-train loss, thats 340hp and 390t.
If that's what you get custom tune with NO mods, color me impressed. BUT I assume some work had to be done, just not sure what.
The dyno you were on typically reads low and its referred to as a heart breaker dyno, as in 10+% lower than others. Without a cam, headers, and a tne your car wouldn't make that kind of power on that dyno. They were fooling with you.
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Old Jul 25, 2015 | 01:07 AM
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Originally Posted by TLS_Addict
The average driver must be horrible. Lol
I guess your right. 200+ pounds heavier.
http://www.corvettelegends.com/zr1.htm

Last edited by THE 383 admiral; Jul 25, 2015 at 01:29 AM.
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Old Jul 25, 2015 | 01:12 AM
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Originally Posted by THE 383 admiral
There are many corrections that can be made to mathmatically correct Open & closed loop AFR. Turn on the fans for better heat protection. Un- restrict a few more RPM's. Cylinder volume injector flow is also mathmatical. But for maximum performance. Not using manditory DataLogs. The results will be minimal or worthless. There are way to many variables. Example a mail order tune. Would never be able to individually adjust my injectors. Balancing via exhaust temp. I'M amazed All of the tables i have corrected with the small amount of simple upgrades on my current stock motor. The results have been very impressive.
Something in me says that if I were writing you a mail order tune, I wouldn't take it to the max for fear of an issue that breaks your engine so I'd backpedal a little for more margin.
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Old Jul 27, 2015 | 09:32 AM
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Originally Posted by THE 383 admiral
I guess your right. 200+ pounds heavier.
http://www.corvettelegends.com/zr1.htm
Having piloted a stock 1990 ZR1 outside of Rochester, NY in the dead of summer with over 2500 DA to 111, I can say that you shouldn't trust articles off the internet. Even though you can't put anything in the internet that isn't true.

Too bad that car burned to the ground in a garage fire. Bad wiring from an outlet to the garage door opener motor. :/
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Old Jul 27, 2015 | 11:09 AM
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OK, your telling rexracer he should be 110+ MPH in a stock LT1 with 180K very few add-on's with 340BHP car weight approx. 3330 we all know air & temp will create deviations.
you were in a 90 ZR1 with underrated 375HP car weight approx. 3503 that pulled 111MPH VS 108MPH from a review.
spec wise 93 ZR1 is the slowest. There is only one way to prove this. 90 VS 93 stock ZR1 battle. A very unfortunate ZR1 loss. Hopefully compensated.

Last edited by THE 383 admiral; Jul 31, 2015 at 05:12 PM.
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