TylerC Posted February 11, 2014 Report Share Posted February 11, 2014 I have been looking for a performance chip for my 94 cutlass supreme convertible with a 3.4L engine but have only found some for the 3.1L. Does anyone know of any for the 3.4L? Quote Link to comment Share on other sites More sharing options...
Andrew Posted February 12, 2014 Report Share Posted February 12, 2014 This is the only one i know of for a 94, and i cannot vouch for its effectiveness. http://gmtuners.com/ Not likely much difference. Your best option would be to swap out your harness and PCM from a 97 LQ1 and custom tune it. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted February 12, 2014 Report Share Posted February 12, 2014 i'm not a fan of Ryan's work..... too many people commenting on interesting run characteristics. the stock 94-95 LQ1 tune is already pretty much on the edge with 87 octane, about the only thing that can be done to improve output is lessening/disabling torque management stuff. i've done a premium fuel tune with some decent real-world results(picked up about 5MPH in a 1/4 mile run), but there isn't much more than that possible on a stock engine. Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted February 12, 2014 Report Share Posted February 12, 2014 Robert, I've generally run only premium in my '95...is that not really necessary? i'm not a fan of Ryan's work..... too many people commenting on interesting run characteristics. the stock 94-95 LQ1 tune is already pretty much on the edge with 87 octane, about the only thing that can be done to improve output is lessening/disabling torque management stuff. i've done a premium fuel tune with some decent real-world results(picked up about 5MPH in a 1/4 mile run), but there isn't much more than that possible on a stock engine. Quote Link to comment Share on other sites More sharing options...
94 olds vert Posted February 12, 2014 Report Share Posted February 12, 2014 Dont run premium in a DOHC. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted February 12, 2014 Report Share Posted February 12, 2014 GM never said it was..... but i've seen some unusual knock activity happen on the 94-95 LQ1 cars that i have scans of. it generally doesn't happen at higher throttle settings, just during cruise situations, which is..... odd. could be caused by the way the main spark table is calculated, it runs off of a cylinder-airmass value, like what OBD2 does. i get the feeling that any kind of MAF discrepency will cause the delivered spark to be something other than desired. inaccurate MAF causing incorrect spark. i think you would need to scan every individual car to be 100% certain of how they act. then again, the same thing happens with the early 00s 3400 grand ams/similar. GM basically runs them on the edge of 87 octane and has the knock sensor do the rest. Quote Link to comment Share on other sites More sharing options...
Knight1o1 Posted March 8, 2014 Report Share Posted March 8, 2014 (edited) I have been looking for a performance chip for my 94 cutlass supreme convertible with a 3.4L engine but have only found some for the 3.1L. Does anyone know of any for the 3.4L? Hope this is good If you try it let us know how it works, I may be Retrofiting Cutlass DOHC coupe soon. GF Performance Chip Kit for the OLDSMOBILE CUTLASS SUPREME http://www.gfchips.com/oldsmobilecutlasssupreme.aspx WHAT IS IT? The GF Performance Chip adjusts your air/fuel ratio, ignition timing, and other aspects of your vehicle's engine to SAFELY increase the power, while increasing fuel economy significantly. Our chips are prepared for your vehicle. Your car will run smoother, run cooler and more efficiently at the same time. The gains we advertise are real, and are guaranteed with a money back promise. Our chips will not only increase horsepower, but torque as well for more REAL power. It increases power throughout the full RPM range unlike many competitors Edited March 8, 2014 by Knight1o1 Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted March 8, 2014 Report Share Posted March 8, 2014 IAT signal modifier, also known as: junk. fun fact: the MPFI cars do not modify spark advance AT ALL due to IAT changes. the effect on AFR is also absolutely tiny. Quote Link to comment Share on other sites More sharing options...
z34Phoenix Posted March 14, 2014 Report Share Posted March 14, 2014 i know the 96+ do pull or add timing from input in the IAT. that box has no way of knowing what rpm the car is at or any other info... all that thing can do is simulate a specific IAT reading and hope it performs better for you. spoofing the iat can help. if someone were to setup an AEM failsafe wb controller you could set it to pull timing if you went too lean. or to make a happy knob.... OR just tune it correctly to start with. Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted March 14, 2014 Report Share Posted March 14, 2014 I totally missed this earlier... why? As Robert mentioned in a later post, I ran into occasional knock during cruise from time to time..moving to premium eliminated the knock. Dont run premium in a DOHC. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted March 14, 2014 Report Share Posted March 14, 2014 i know the 96+ do pull or add timing from input in the IAT. that box has no way of knowing what rpm the car is at or any other info... all that thing can do is simulate a specific IAT reading and hope it performs better for you. spoofing the iat can help. if someone were to setup an AEM failsafe wb controller you could set it to pull timing if you went too lean. or to make a happy knob.... OR just tune it correctly to start with. the 94-95 LQ1 PCMs have the code and table to do so already, but i can't find any applications that have the table filled with anything other than 0s. 93-95 3100 code uses it.... but it looks like it was never intended for much other than retarding spark due to high IATs, rather than adding at lower temps. that is probably how i would set it up as well, especially if i knew that there were people going to be doing resistor mods to try and trick more advance out of it. Quote Link to comment Share on other sites More sharing options...
94 olds vert Posted March 14, 2014 Report Share Posted March 14, 2014 I have never noticed any knock on my 3.4. Running premium gas with TunerPro connected couldnt tell any difference. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted March 14, 2014 Report Share Posted March 14, 2014 EVERY engine is different and will react act such. a tiny compression leak into the intake or exhaust port or past the rings that causes ~5PSI or less loss of compression can be the difference between running regular and being fine or having to run premium to prevent knock. layer of carbon on the pistons, head and face of the valves? can do it. headgasket has compressed more than it was supposed to? can do it. connecting rod stretch? can do it. timing belt stretch/cam positioning during timing set procedure? can do it. timing chain stretched? can do it. overly sensitive knock sensor? can do it. old, deposit covered spark plugs? can do it. there is no one right answer for every engine. Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted March 14, 2014 Report Share Posted March 14, 2014 (edited) Thanks, Robert! I hadn't considered a couple of those, so it might be good to do a test, and see if that changed anything.. Edit: What I had meant to say is I've changed a couple of those, so maybe premium isn't needed any longer...might be good to test. And, I'd never considered rod stretch affecting compression, but once you mentioned it, I could understand why. Thanks! Edited March 14, 2014 by Galaxie500XL Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted March 14, 2014 Report Share Posted March 14, 2014 they're stout rods, being forged and rated for 7K RPM, but they can/will stretch eventually. with nearly a quarter of a million miles on yours.... i wonder if there is any permanant, measurable stretch to them yet. Quote Link to comment Share on other sites More sharing options...
z34Phoenix Posted March 14, 2014 Report Share Posted March 14, 2014 I have seen other tables in tiny tuner that watch iats. I can't remember exactly what ones though... Just cause they aren't mapped doesn't mean they don't exist... I was happy recently when I found a table that adds spark due to ect. Quote Link to comment Share on other sites More sharing options...
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