Sprintex / Boostec Supercharger Install

Thanks for posting the picture Yan. We test fitted the hood vent in different locations and there are very few locations where there was enough underhood clearance to fit. A location further back behind the supports and the hood vents would hit the engine. Other testing that we did showed that this forward location is just where there is a low pressure area above the hood and the underhood higher pressure hot air would flow up and out the vent. Actually it works great as our testing showed it would.

As for this TEST hood, it was bought at the junk yard and cut with a scroll/jig saw. It was to check for clearances and function. The original hood is still intact and unmodified. My next version will be cut out with a 3" rotary cutoff disc and I will preserve the supports. Be happy that I painted it, I could have left it the beat up tan color. Now that would be a hack job.
 
It's a pretty small supercharger. It's the same unit Rick uses in his 1.6L MINI cooper kits (equivalent to an M62).... which makes a whole heap of sense on a 4.0L. I'm not sure how that will relate to it's overall longevity or heat build-up though.

Comparing these 2 kits out of context is outrageously stupid. What are the pulley sizes of both kits? What is the pulley step-up ratio of both kits? So you don't know that the Jeep kit spins the supercharger at a ratio that puts out 4.8L of air for 1 complete engine cycle (2 rotations of crankshaft). So the supercharger is trying to cram 4.8L into a 4.0l engine with horrible flowing heads and tiny/small camshaft specs. The efficiency of these superchargers is so much higher than those M62 or M90 blowers. Those M62 and M90 blowers are what 20+ years old technology? You can't compare apples to oranges.
 
Outrageously stupid? Not really. Granted the Sprintex is more efficient, but at the same time it’s undersized and the faster it spins the more heat it makes. I don’t know the pulley used on the MINI kit; however, if Rick used a smaller pulley on the Jeep kit than it’s pretty much a bandage solution to avoid using a larger supercharger.
 
It's a pretty small supercharger. It's the same unit Rick uses in his 1.6L MINI cooper kits (equivalent to an M62).... which makes a whole heap of sense on a 4.0L. I'm not sure how that will relate to it's overall longevity or heat build-up though.

....and I just double-checked the site. The kit's actually 4K, and the listing specifically says that it "comes complete with a plug-and-play piggyback computer". There should be no splicing involved at that price-point/ with that description.

Im just curious how heat soak will effect the blower. I know those roots chargers love to make heat and in that configuration i assume it can get real hot if your pushing it. Its a good idea though to keep it on the conservative side, which it looks like your doing. Something like vents or whatever to let some heat buildup out of the hood is probably a good idea.
 
Yeah, I saw that hood vent on CF. I thought you guys were vehemently opposed to hacking your jeep?
You didn't want to cut small holes in your headlight buckets for proper bi-xenons but you were willing to cut ALL of your hood supports


... Glad to see you haven't changed since out last confrontation Yannycakes. When was the last time your Cherokee was in low range? Does it even shift into low range? How's that early gen Rimmer supercharger install going?

Wait. What the?... WHAT IN THE WORLD IS THAT THING RIGHT BELOW YOUR REAR BUMPER?!?
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ZOMG!!!! ROFLMAO!!!!!! BWAHAHAHHAHAHAHHAHAHAHAAA!!!!!
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Nice Orvis spoiler btw.
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Oh, before I forget. How are your LED blinkers coming along? Ever get those figured out? I did and mine are working PERFECTLY. :moon: GOMLsaurus!!!
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....and I just double-checked the site. The kit's actually 4K, and the listing specifically says that it "comes complete with a plug-and-play piggyback computer". There should be no splicing involved at that price-point/ with that description.

We called Mr. Rimmer directly and got a good deal. End of story.

I actually think that's rather cheap for a supercharger system IMHO. Everyone has a different definition of "plug-and-play". I personally woldn't say that the AEM piggyback is plug-and-play, but it's hardly an effort to wire in. You have to make all of something like what? 10 (or so) connections. If you can't solder such a small amount of wires, you don't deserve to be modifying a Jeep (let alone installing a supercharger). Oh, wait. You didn't do any of the work done on your Jeep yourself. :doh: Silly me. I forgot.

Before this goes any further... Let's try not to make this another Morimoto thread. We all know how well THAT flame fest turned out.
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If you would like to voice any more of your "concerns" or just to flame me, feel free to shoot me a PM. That way we don't aggravate the moderators and make them do this: :badpc: again.
 
Outrageously stupid? Not really. Granted the Sprintex is more efficient, but at the same time it’s undersized and the faster it spins the more heat it makes. I don’t know the pulley used on the MINI kit; however, if Rick used a smaller pulley on the Jeep kit than it’s pretty much a bandage solution to avoid using a larger supercharger.

Meh. We all have our own opinions. You don't need a supercharger rated for 500+hp on an engine that will probably never (in most cases) make over 350hp (which is where I'm expecting to be at with all my mods that I've done in addition to the supercharger).

Im just curious how heat soak will effect the blower. I know those roots chargers love to make heat and in that configuration i assume it can get real hot if your pushing it. Its a good idea though to keep it on the conservative side, which it looks like your doing. Something like vents or whatever to let some heat buildup out of the hood is probably a good idea.

It's a twin screw supercharger. Not a roots.

If the charge temp gets too hot, I'll inject some propane (and maybe a small amount of nitrous) pre-supercharger. I'm not too worried about the temps.

I just put vents in my hood... As well as a hood spacer (at the hinge). I'll have pics on my CF build log shortly.
 
*cough*

Guys. Please.

You are stooping to a level that is quite unbefitting in this discussion. Grow up, either that, or stop complaining about Urban Yan's posts in your threads if you are going to drop to a level even lower than his. It's disgusting. You can't have it both ways.
 
You are stooping to a level that is quite unbefitting in this discussion. Grow up, either that, or stop complaining about Urban Yan's posts in your threads if you are going to drop to a level even lower than his. It's disgusting. You can't have it both ways.

I stand-by my comments. For ~4k I expect a plug-in harness (especially when one is advertised), a dynoed tune, and something that runs properly out the box. You can call that trolling or stooping to some low-level; I call that being a smart customer.
 
I stand-by my comments. For ~4k I expect a plug-in harness (especially when one is advertised), a dynoed tune, and something that runs properly out the box. You can call that trolling or stooping to some low-level; I call that being a smart customer.

I gotta agree with you there. But... We don't live in a perfect world. Things rarely go according to our ideal plans.

We'll eventually get this 100% figured out and when we do, we'll take it from there.
 
Goodbye Yan. Your bullying and abuse stops here.
 
I stand-by my comments. For ~4k I expect a plug-in harness (especially when one is advertised), a dynoed tune, and something that runs properly out the box. You can call that trolling or stooping to some low-level; I call that being a smart customer.
From what I have seen in this thread I agree with you.

I was more referring to some of the other threads earlier this year in which you ended up being technically right but came across as rather abrasive/trolling at the time.
 
I gotta agree with you there. But... We don't live in a perfect world. Things rarely go according to our ideal plans.

We'll eventually get this 100% figured out and when we do, we'll take it from there.

You paid good money for this kit. You should be enjoying it NOT doing Rick's job by trying to get it to run. This wouldn't be an issue if you bought a box of parts for very little money (essentially what I have), but you paid allot of money for a complete kit.
 
... the Sprintex is more efficient

That's absolutely correct.

...at the same time it’s undersized and the faster it spins the more heat it makes.

How much more heat? You don't know. 4.8L supercharger output in a 4.0L engine. That is not undersized.

...I don’t know...

Isn't that the truth!

...used a smaller pulley on the Jeep kit than it’s pretty much a bandage solution to avoid using a larger supercharger.

The pulley sizing still keeps the supercharger within it's specifications. No need to go bigger. Bigger is not always better.

Please keep this thread on topic. I am happy to have an intellectual discussion on the many aspects of supercharging the XJ.
 
I don't want to just make it run, I want to make it run better!
 
I don't want to just make it run, I want to make it run better!

X 1,000,000!!!!!!!!!!!!!!!!!!!!

Where's the fun in following the crowd? Lol. :D

You paid good money for this kit. You should be enjoying it NOT doing Rick's job by trying to get it to run. This wouldn't be an issue if you bought a box of parts for very little money (essentially what I have), but you paid allot of money for a complete kit.

It does run. It runs quite well actually. I just can't go into boost yet.
 
It does run. It runs quite well actually. I just can't go into boost yet.
Wait. What?


I don't want to just make it run, I want to make it run better!
You two are trying to run before you can walk.
Also, I would appreciate if you didn't quote me out of context.


..
 
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