New additions

O

O-Gauge Steamer

NAXJA Forum User
Location
Colorado Springs, Colorado
Finally, I'm getting things done.

Hood Vents. There are drip pans under them. Not bad for $4.56 from the JY...
P9090002.jpg


Supercharger
P9090003.jpg


A Pillar Pods for Manifold Pressure and Air Pressure. Using an ARB compressor.
P9090004.jpg


USB Port. Used to communicate with the Perfect Power SMT8-L FIC.
P9090005.jpg


The red LED is the Fault Indicator for the electric water pump controller (Davies-Craig EWP115). Once I get the tune dialed in for gasoline, I am going to attempt to make an E85 Map and run this on E85. As E85 has an octane rating of what, 120, so it should produce some ponies. Dyno runs will be posted as they happen.
 
can tell me more about your supercharger setup, the intake manfiold looks a bit strange to me :)
blower type, your blower looks like a roots/ eaton/ twin screw how come you didn't relocate the throttle?
boost, inter cooled or not, any issues you faced , fuelling system, etc..
 
Well, yah... No real big deal. OK, the pillar pods were a biggy but the blower? Doesn't everyone have one? No? Why not?

The SC is a Sprintex unit out of Australia. Unlike a Roots type (Eaton, etal) SC this is a Rotory Screw compresor. Just like what is used in industrial applications for house compressed air, only smaller. The Intake manifold is part of the kit and is a custom cast piece. There is not an intercooler as the discharge temperature of this SC is much less that any roots type made. Couple that with the boost level (I have seen 6lbs here at near 7,000') and you do not need an intercooler. The TB is where it is as Sprintex has yet another cast aluminium piece on the inlet side of the SC. It put the TB almost back to the sock location, just a tad higher. I am inprocess of tuning it. Once I am satisfied, I'll post and compare the pre and post installation numbers. So far, the biggest issue I have had was that I was short one vacuum connection on the inlet side of the blower. So, I just popped off the intake casting and punched/tapped a hole. I reassembled using Permatex Ultra Copper sealant. Turns out I used the port for the IAT Sensor. I placed it directly under the TB. I have passed that along to Sprintex so hopefully in the future the additional hole will be there. The other issue was hte power steering pump reservoir. Every reservoir I have seen for the 4.0 has the return on hte back side of the unit. I checked every store here in the Springs and all of them were the same. What to do? You absolutely MUST have the return where it is in order to clear the gear case of the SC. I hit the JY looking at Saginaw pumps. What I found was that the 93-98 ZJ with the 5.2L V-8 has the reservoir needed. Snagged one, cleaned it and installed it. A WJ might fit if it is not too tall. The pump is rotated anticlockwise (widdershins) to clear the SC as it is which raises the top of the reservoir. Also, my very nice headers prevented the new intake manifold from seating. You have to have either a stock manifold or maybe, headers that hug the block. Room is a bit lacking under there.

I am thinking of going E85 with this. Yes, I know, it will take more fuel. That is OK, given the 120 Octane of E85. The FIC (SMT8-L) on this unit is made by Perfect Power out of South Africa. Perfect Power makes what they call an "E-Tune" controller that you connect at the injectors. Similar to the Convert2E85 setup made in Denver. The Perfect Power unit is user tunable. The SMT8-L has the capability to run two different Maps. I am looking for the "A" map to be Gas and the "B" map to be E85. Worst case is a set of larger injectors. Maybe 26lbs? Problem with that solution is the open loop start. It would be massively rich until the PCM goes into closed loop. That and I would have to completely retune it for gas as well...

USB Port. Yes, I do not like cables dangling all over everywhere (I am a retired Engineer and you know how those people are) so I did this. Only tricky part is the cable that runs from the port on the dash to my laptop. It has to be an A-A type with one caveat. The RxTx lines must not be crossed as is usual. So I just made a cable. What I have not shown is my Scantool. I am using the ScanXL Pro software from PPE and the OBDII hardware interface from Scantool.net. If I decide to make that a permanent installation, there will be an additional port show up on the dash. For now, I just (shudder) drape the wiring over the colum to the laptop. Also, I really do need the get an AFR gauge installed.
 
o-gauge-steamer said:
As E85 has an octane rating of what, 120,
Click to expand...

No it doesn't.
http://ethanolrfa.3cdn.net/dd9e74ce1c454a97cc_rbm6bdgh3.pdf; page 29 said:
There is no requirement to post octane on an E85 dispenser. If a retailer chooses to post octane, they should be aware that the often cited 105 octane is incorrect. This number was derived by using ethanol’s blending octane value in gasoline. This is not the proper way to calculate the octane of E85. Ethanol’s true octane value should be used to calculate E85’s octane value. This results in an octane range of 94-96 (R+M)/2. These calculations have been confirmed by actual-octane engine tests.
Click to expand...
 
o-gauge-steamer said:
Well, yah... No real big deal. OK, the pillar pods were a biggy but the blower? Doesn't everyone have one? No? Why not?

The SC is a Sprintex unit out of Australia. Unlike a Roots type (Eaton, etal) SC this is a Rotory Screw compresor. Just like what is used in industrial applications for house compressed air, only smaller. The Intake manifold is part of the kit and is a custom cast piece. There is not an intercooler as the discharge temperature of this SC is much less that any roots type made. Couple that with the boost level (I have seen 6lbs here at near 7,000') and you do not need an intercooler. The TB is where it is as Sprintex has yet another cast aluminium piece on the inlet side of the SC. It put the TB almost back to the sock location, just a tad higher. I am inprocess of tuning it. Once I am satisfied, I'll post and compare the pre and post installation numbers. So far, the biggest issue I have had was that I was short one vacuum connection on the inlet side of the blower. So, I just popped off the intake casting and punched/tapped a hole. I reassembled using Permatex Ultra Copper sealant. Turns out I used the port for the IAT Sensor. I placed it directly under the TB. I have passed that along to Sprintex so hopefully in the future the additional hole will be there. The other issue was hte power steering pump reservoir. Every reservoir I have seen for the 4.0 has the return on hte back side of the unit. I checked every store here in the Springs and all of them were the same. What to do? You absolutely MUST have the return where it is in order to clear the gear case of the SC. I hit the JY looking at Saginaw pumps. What I found was that the 93-98 ZJ with the 5.2L V-8 has the reservoir needed. Snagged one, cleaned it and installed it. A WJ might fit if it is not too tall. The pump is rotated anticlockwise (widdershins) to clear the SC as it is which raises the top of the reservoir. Also, my very nice headers prevented the new intake manifold from seating. You have to have either a stock manifold or maybe, headers that hug the block. Room is a bit lacking under there.
Click to expand...

not that the 5.2L reservoir is too tough to find, but would the RHD steering pump and reservoir be a possible fix too? I think it has the return on the side with long aluminum tubes running to the right side for the steering box.
 
I looked at the photos of the RHD reservoir and it appears that the return points down. That will not clear the nose of the gear case. I looked at a complete WJ pump w/reservoir but as the pump is rotated antioclockwise it raised the height of the reservoir. I was not convinced it would fit so passed on it. Maybe it will, I can not say for certain, so will not lead anyone in that direction.

I will post on the the interchangability of the pumps themselves. Both the WJ and the XJ are Gen II GM Saginaws and if the reservoir inlets are the same (I'll measure them) then the 2001 WJ pump with the ZJ reservoir might be the best combination.

The 01 pump is a 1950psi internal bypass vs our 1400psi. It also has a much higher flow (I believe it is 2.8gpm) rating as the 01 had a hydraulic fan and the PS pump powered it. Take a fair bit of volume to drive the hydraulic motor.

If I can get out today, I'll take some measurements. We need to know the ID and the depth of the conenction points involved. Will need to find a friendly parts house to let me take the numbers.

As a side note, it looks like I am going to replace the Perfect Power with an AEM F/IC 6. More to follow but as I am a pensioner, it will most likely drag out for months as I need to collect the funds needed to get it done.
 
E85 takes something like 30% more fuel. You are probably going to need more then 26lb injectors. And a new fuel pump too. I would have thought you would already be running more then 26lb injectors. On my Mustang I went from 19lb stock to 42lb with just 9lbs boost. Have you dynoed it or do you have a wide band O2? What is your wot a/f ratio?
 
I am in process of getting an AFR gauge setup. As even an inexpensive one runs near $300, it will be a while. Pensioner, you know. The Sprintex SC uses a seventh injector to add the fuel needed under boost so the stock injectors work fine.

If I do abandon the SMT8-L for an AEM F/IC then larger injectors will be mandatory. As of now, I am monitoring the pulse duration of the seventh injector to get an idea of how musch fuel is being added. Once I have a solid idea, then that flow can be used to size the replacement injectors. On the other hand, the AEM unit is capable of driving an extra injector so it would be possible to go that way and not make any other (expensive) hardware changes.

Will update when more data has been crunched...
 
The AEM has pretty good support so you could probably find people to help with tuning by sending them datalogs and stuff. Also call your local dyno tune shop and see how much it is for a couple pulls using thier wideband. They will usually let you tune it in between pulls if you go when they aren't too busy. It looks like you have everything pretty well in hand. I'm not a pensioner but I do know what it is like to know exaxtly what you need but have to take days of saving to get there. Good luck with your project.
 
You must log in or register to reply here.
Back
Top