Norm Peterson
corner barstool sitter
Good to hear you were finally able to get everything working right.
Norm
Norm
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Gears purchased/installed were $1,579.30 and the tune (SCT X4 programmer and 1 Steeda 4.88/93 octane tune) was $641.95 so $2,221.25 total.@L0566Bullitt so if I may ask after all said and done what did changing the gears cost ya over all to get everything dialed in? gears, install, tune.... IM guessing about 2500ish give or take.
1. Called East Coast Gear Supply and setup an appointment to have 4.88s installed. They used a Yukon gear kit.Now that the OP has had the issues resolved with the 4.88 gear swap , I would like the OP to list the process he would take to install 4.88 gears as a reference for the rest of us interested in doing a similar swap. A summary of the parts used and who manufactured the parts would be great.
Tbh I keep the accelerator mashed most the time.I know this wasn't the objective, but have you observed what impact this swap has on your gas mileage? Just curious.
Relative to the torque available at the higher revs you're running, you're using less of what's available so this doesn't surprise me all that much. We'd probably have to see a BSFC curve to get much better of an idea.But in all seriousness I did notice with this tune, cruising at 60ish it's pulling high vacuum so I think I'd get really good mpg. I doubt you'd notice 1 mpg difference.
Really glad you got the software side sorted out but having swapped ring and pinions on a variety of cars in the past I'm not sure what you described above is "very normal".Some notes to consider:
- I notice a slight rumble/vibration after the gear swap. Nothing unbearable, but you may notice it. Called ECGS and they said this is very normal.
Between the gears and tune, it's literally a different car. I'm SO happy with the comboA good forum read on a Sunday afternoon. Glad to see that it looks like it all worked out for you, Jon. I enjoy someone's thinking "outside the box" to improve what they think is not right with their car. It falls in line with drag racer's innovation: going faster within a given space. Kudos to Steeda for their involvement: problem, cause, solution. This opens the door for the rest to consider what L0566Bullitt accomplished. I used to teach my classes that it's always easier and cheaper to learn from someone else's experiences.