Boostec Supercharger Information
- Thread starter O-Gauge Steamer
- Start date
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Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
24 mpg?
- Location
- Wasatch Range
Cost justification time.........
My XJ has been averaging 16mpg-measured-and I average 1320 miles per month commuting. That equals 82.5 gals of fuel per month.
Regular Unleaded is currently $3.59/gal in No Utah x 82.5 gals = $296.18
If I could pick up 8mpg by installing the Boostec SC and electric water pump, I could reduce my fuel consumption by 27.5 gals (55gals VS 82.5gals) and reduce my monthly fuel expense to $197.45, for a monthly savings of $98.73, or an annual savings of $1,184.76.
36mo savings = $3554.28
Boostwerks.com
NAXJA Forum User
- Location
- Colorado
Unless your commute is 90% highway with no traffic, I doubt anyone averages 70MPH making the 24mpg rating irrelevant. Also as far as I know, this XJ is 2WD with no lift, and factory size tires.
Most engines will see the same or less mileage with forced induction if tuned properlly (SC or turbo). It's honestly just wishful thinking to think your going to get better mileage with any FI setup. More air = more fuel...simple as that.
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
^^^So, the Boostec heep is a 2wd AW4 with 3.55:1 stock chryco 8.25 running P215/75R15 tires inflated to 26psig.
More air/fuel will kill mileage. This is absolutley true. That being said, most if not all manufacturers pull out of closed loop at or near WOT to reduce the likehood of fuel starvation and as a result run a bit rich. By staying out of WOT, fuel savings can be acheived. The EPA does not read emissions at that point of the engine cycle, so a"fat" mixture is out of thier baliwick.
10 years ago, I built a 4.7 stroker using the Alabama Cylinder Heads (Patriot Performance/Hesco) aluminium head with the 1.94/2.02 valves (large valve option) and a 68mm TB off of the 4.7 V-8. I spared no expense and my mileage on my 97 with 6" of lift and 33x12.50s, 5-speed, 4:11 gears went from around 13 on the hiway to around 18. At the time, I was commuting from Colorado Springs to Aurora (75 miles each way) on Hwy 83/225. What I found was that I had copious amounts of throttle left to play with at speed rather than the near/at WOT I used to run.
So, as my rig evolves with the Golectric and Boostec parts, I will closely monitor my mileage and report it. To that end, I installed an OHC a month ago and have found that I run a very reliable and sad, 13.5 in town and 18.3 on the hiway. This on the stock suspension, P235/75R15 tires inflated to 28psig. This mileage is corrected by the 3% that the oversized tires have slowed down the speedometer/odometer.
AND NO!!!! The XJ was ran on baseline el-cheapo low grade fuel.
More air/fuel will kill mileage. This is absolutley true. That being said, most if not all manufacturers pull out of closed loop at or near WOT to reduce the likehood of fuel starvation and as a result run a bit rich. By staying out of WOT, fuel savings can be acheived. The EPA does not read emissions at that point of the engine cycle, so a"fat" mixture is out of thier baliwick.
10 years ago, I built a 4.7 stroker using the Alabama Cylinder Heads (Patriot Performance/Hesco) aluminium head with the 1.94/2.02 valves (large valve option) and a 68mm TB off of the 4.7 V-8. I spared no expense and my mileage on my 97 with 6" of lift and 33x12.50s, 5-speed, 4:11 gears went from around 13 on the hiway to around 18. At the time, I was commuting from Colorado Springs to Aurora (75 miles each way) on Hwy 83/225. What I found was that I had copious amounts of throttle left to play with at speed rather than the near/at WOT I used to run.
So, as my rig evolves with the Golectric and Boostec parts, I will closely monitor my mileage and report it. To that end, I installed an OHC a month ago and have found that I run a very reliable and sad, 13.5 in town and 18.3 on the hiway. This on the stock suspension, P235/75R15 tires inflated to 28psig. This mileage is corrected by the 3% that the oversized tires have slowed down the speedometer/odometer.
AND NO!!!! The XJ was ran on baseline el-cheapo low grade fuel.
- Location
- Wasatch Range
Hehehe......my post was tongue in cheek, I would never attempt to cost-justify a FI solution based on an assumed improvement in fuel economy.
h-townxj
NAXJA Forum User
- Location
- Hanford, Ca
Pshh lol I got a whopping 12mpg with avenger sc, 33" 4:10 lol that was untuned still haven't done a full tank tuned. Hopefully I can see this setup in person some time soon
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
I will be the very first in line to admit that the idea of FI and an increase in mileage appears to be mutually exclusive terms...
So imagine my surprise. Only thing is, we do not have a baseline for the 2WD, pre-boost. Anyone out there have a stock 2WD? I have my baseline so, as thing progresses, we shall see what we see and I will report the findings accurately. The chips will fall where they fall. I may be beating this into the ground, but I have the interests of
members first, I'm second and Boostec brings up the tail of the concern list. I am neither an employee or shill for them...
I do not wish to speak ill of any other product but...
The Avenger setup is rather notorious for not excatly working correctly. Insofar as the fuel management is concerned, I don't think they ever managed to sort it out.
I was wrong about the first unit going to Puerto Rico, it is going to Ecuador today.
So imagine my surprise. Only thing is, we do not have a baseline for the 2WD, pre-boost. Anyone out there have a stock 2WD? I have my baseline so, as thing progresses, we shall see what we see and I will report the findings accurately. The chips will fall where they fall. I may be beating this into the ground, but I have the interests of
members first, I'm second and Boostec brings up the tail of the concern list. I am neither an employee or shill for them...I do not wish to speak ill of any other product but...
The Avenger setup is rather notorious for not excatly working correctly. Insofar as the fuel management is concerned, I don't think they ever managed to sort it out.
I was wrong about the first unit going to Puerto Rico, it is going to Ecuador today.
I remember Rick telling me that the fuel and ignition package were a weak point in his earlier endevours. That includes the first gen unit along with the avenger system.
h-townxj
NAXJA Forum User
- Location
- Hanford, Ca
Oh I agree the avenger comes with no fuel management at all nothng just bigger injectors. You can actually feel the power loss when It leans out. Hence buying the aem unit for it. I wouldn't pay full price for an avenger because it's not a full kit. But with this one at least they have developed a full working kit
tragiccomic1972
NAXJA Forum User
- Location
- Snow Camp NC
Where do I find one of these golectirc water pumps?
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
Golectric... Funny you should ask. I am installing the first one here directly. Once the bugs are out (there are sure to be some...) I will post a thread on the whole thing.
Plan is to provide the pump with controller, fan (uses the same controller) with new shroud, NEW cored out mechanical pump (just got the first two today from the machine shop with the impellors removed) plus new upper and lower radiator hoses that are precut to the right dimensions for ease of installation. The trickiest part is getting the controller out of the engine bay. The controller/pump manufacturer does not want the controller under the hood but in the cab.
Plan is to provide the pump with controller, fan (uses the same controller) with new shroud, NEW cored out mechanical pump (just got the first two today from the machine shop with the impellors removed) plus new upper and lower radiator hoses that are precut to the right dimensions for ease of installation. The trickiest part is getting the controller out of the engine bay. The controller/pump manufacturer does not want the controller under the hood but in the cab.
Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
Any updates?
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
We discovered a slight "hitch in the get-along" when the PCM switches out of closed loop into open loop. It takes an extremely specific set of conditions for it to show up. That being said, they are working on killing it.
At this point, I would say that it it 99.97% there.
The 65mph to shut off (114mph) is insane... 70 mph on approximately half throttle.
Yesterday, we took it out on I25 to work on the tuning for the hitch. As a diagnostic aid, we replaced the boost gauge with a vacuum/boost as I wanted to see exactly what was going on.
Very interesting. At 65mph, level (well...) road we were drawing about 6"Hg a very slight roll of the throttle popped us up to 1#boost for about 2 seconds and then it was back into vacuum and we were running 75mph. Same thing to roll up to 85mph and so on.
I see this ability to effortlessly cruise on the highway to be the biggest advantage for us drivers of brick walls. It really needs to be seen to be believed. I do know that Boostec is shopping for Authorized Installers US wide so any shops out there that might be interested in that should contact Boostec directly. The e-mail is [email protected] so have fun.
As for the water pump istallation, I have a thread running in the Product Development section. http://www.naxja.org/forum/showthread.php?t=1062507 and will keep that current as things progress.
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
I have not had a chance to drive it yet but... I am told that the last hitch is gone. Just as soon as I can actually get into it, I'll post.
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
OK...
Here is a video of the XJ accelerating from a stand still to the factory speed limiter. Note how long it takes to get there.
And yes, the bugs are out. I have driven this thing and it is extremely un-XJish in it's highway performance.
http://www.youtube.com/watch?v=zdgCxNtDZKI
Watch and comment!
Here is a video of the XJ accelerating from a stand still to the factory speed limiter. Note how long it takes to get there.
And yes, the bugs are out. I have driven this thing and it is extremely un-XJish in it's highway performance.
http://www.youtube.com/watch?v=zdgCxNtDZKI
Watch and comment!
Boostwerks.com
NAXJA Forum User
- Location
- Colorado
Yup...thats fast! 
Great job guys. I'd love to see that thing run down the 1/4. It looks like a solid 13 second pass.
Great job guys. I'd love to see that thing run down the 1/4. It looks like a solid 13 second pass.
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