hey everyone, i am hoping that you guys can help me...i am currently doing all the research i need to do before i decide to buy the JRSC for my 99 lude...and one thing i couldnt find was if there was a 8 or 9 lbs. pulley to switch from the 6 lbs. that comes with the kit, and also what is the max amount of boost that we can run on our blocks, i have heard of our cars pushing about 10 lbs. of boost from turbos....
There is a 9psi pulley upgrade. At this time it is not suggested to run the 9psi pulley on the stock block. There are a few JRSC owners that are researching using water injection in conjunction with the 9psi pulley on the stock block. Anything over 7psi is pushing it. Anyone pushing 10lbs on the stock block is a time bomb. Get the supercharger and just run 6lbs for a while. Get all of your tuning done and then worry about more power. Trust me 6psi will be enough power to satisfy you, at least for a while.
Endyn make two types of pulleys for the H22 JRSC. You can even use them both at the same time for more power, but you might blow something internal. check it out.... Endyn supercharger pulleys
what kind of upgradesdo i have to do to my block....and which companies are suggested?....i am just trying to figure out how easy it will be to eventually change pulley and tuning after i use the 6 lbs. for awhile, and would like more...not saying that i would, or will change....just trying to understand all angles and grasp all concepts.....thanx again fro the help already given,a nd to the help you will give me
Look at the tread below by LC about blowing his engine. I put some pretty detailed info in that about what it takes to build the engine. One of the best companines right now is GE.
I've said it before, I'll say it again... say it with me:
It's not 9psi that blows engines, it's bad tuning.
Remember, just because *you* can't hear detonation, doesn't mean you don't have a problem. The Prelude engine was not designed with boost in mind. Take some precautions.. buy a J&S Safeguard. Yes, I know they are not cheap. Would you rather blow your engine? I know I don't (and didn't!). Why am I *still* the only person on the "not blown" list who ran 9psi for a long period of time? Look at my setup and connect the dots already.
The cylinder pressures generated by boosting at 9psi are *nothing* compared to the cylinder pressures caused by extreme detonation. This is what blows engines. I'm not saying that the stock cylinder walls are bulletproof, but I think it's safe to say that a ring land will probably fail before a cylinder wall.. as we have seen here, over and over.
People keep turning the knob on the JR EMS down, enjoying the fact that their car is getting faster with each click.. but they have no real way of knowing if something is wrong. It's like flying blind.. you have no instrumentation to give you feedback based on your changes (turning the knob).
Sharkcohen has a J&S, so I think he'll be the next at 9psi on the "not blown" list. Carry the torch, brotha
/rant off
Shameless promotion: On a side note, someone still has a J&S Ultra Safeguard version 1 for sale. Perfect for a JRSCed Prelude. PM me.
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Tony S. '03 WRX ... 12.69 @ 108.0 - full interior, stock 16s, street tires
'99 2.5RS '97 Prelude (old car) ... 13.94 @ 100.3 - full interior, empty trunk, 17s, street tires.
cool, thanx for the help guys..im gonna continue on with the research, and buy all the necessary stuff to make sure i wont have any problems....
btw..how many of you have installed your own JRSC on your ludes....how hard was it?, any problems?, any precautions?, i think me and my friends might do it...we have done a ****load of work to our cars, and have turbo'd a few ourselves...so any input would bee great.---thanx
nick
Last edited by corruptdvtec : 11-20-2002 at 01:34 PM.
Originally posted by corruptdvtec how many of you have installed your own JRSC on your ludes....
Mine's gonna be here 11/25 and I'm gonna attempt to put in around Thanksgiving... I hope I don't Ć’uck anything up!! I used to work on my 305 small block so maybe it'll all come back to me Man, I'm so drunk... I'm gonna go pass out now!
Originally posted by corruptdvtec how many of you have installed your own JRSC on your ludes....how hard was it?, any problems?, any precautions?, i think me and my friends might do it...we have done a ****load of work to our cars, and have turbo'd a few ourselves...so any input would bee great.---thanx
Everything on my lude has been installed by me. I am not a mechanic, just a plain Joe with basic tools. The JR instructions are definitive. If you have worked on cars before and have all of the tools suggested in the instructions, you should be fine. I also HIGHLY suggest you purchase a Helm service manual, if you have not already. It makes the install so much easier, and I consider it my most valuable tool. In addition to the tools recommended by the JR instructions, you should have a torque wrench, as well as either a set of metric U-joint swivel sockets or some U-joint swivel adapters for your sockets and various length extensions, as there will be some nuts and bolts around the blower that will be hard to reach without. In particular, the bolts that hold the blower down to the adapter plate are very difficult to reach, especially on the back side between the blower and the firewall. The heads of these bolts also sink into recessed positions, so I found that using a thin walled 1/4" drive socket for them was best for fit.
You might want to check out this thread, I semi documented my install, perhaps you will find something useful in it:
Everything on my lude has been installed by me. I am not a mechanic, just a plain Joe with basic tools. The JR instructions are definitive. If you have worked on cars before and have all of the tools suggested in the instructions, you should be fine. I also HIGHLY suggest you purchase a Helm service manual, if you have not already. It makes the install so much easier, and I consider it my most valuable tool. In addition to the tools recommended by the JR instructions, you should have a torque wrench, as well as either a set of metric U-joint swivel sockets or some U-joint swivel adapters for your sockets and various length extensions, as there will be some nuts and bolts around the blower that will be hard to reach without. In particular, the bolts that hold the blower down to the adapter plate are very difficult to reach, especially on the back side between the blower and the firewall. The heads of these bolts also sink into recessed positions, so I found that using a thin walled 1/4" drive socket for them was best for fit.
You might want to check out this thread, I semi documented my install, perhaps you will find something useful in it:
ijust went into your other post and read it,and i was wondering where you and others have bought J&S Ultra SafeGuard V2...and roughly how much was it..thanx for all the help..
nick
Originally posted by Ritteri Where did you grab that pulley?? Where can I get one?? WHere does it go to create more boost?
I purchased Obsidian7's used pulley. It is a larger diameter replacement for the passenger's side jackshaft pulley. You can get one from Jim Helbing of Motorvations Motorsports: wheelking@webtv.net, (205) 661-3600. $140 new.
A note from Jim when I initially contacted him about the pulley:
Quote:
The price of the pulley alone is $140.00... however, I will not sell it to a Prelude JRSC owner unless he/she has engine management... or at the minimum... 370cc injectors and an adjustable rise-rate FMU. Please call me at the shop to discuss your options.
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Last edited by sharkcohen : 11-21-2002 at 09:24 PM.
Also this link:http://www.theoldone.com/components/blower_pulleys/ shows that there can actually be 2 PULLEYS put on. If I do one of these is it 9lbs boost? Or both of them?? If its more, then is it 12lbs of boost with them both roughly??
Also when swapping out the pulleys do we need to get different size belts too? Lets put some good detail on a response on this one please.
And yeah, I am going to order the AEM EMS for $1150 shipped tommarow. I will probably be doing 440cc injectors when the wideband O2 is ordered also. FYI.
Also this link:http://www.theoldone.com/components/blower_pulleys/ shows that there can actually be 2 PULLEYS put on. If I do one of these is it 9lbs boost? Or both of them?? If its more, then is it 12lbs of boost with them both roughly??
Endyn's note:
Quote:
We recommend that only a single pulley be used on non-modded blowers.
The blower needs to be modified if you want to boost higher than 9 psi. The heat generated at boost levels higher than 9 psi can cause premature failure of the blower, whcih can in turn send pieces of the rotors into the engine causing lots of damage.
If you plan on running 9 psi, replace the passenger side jackshaft pulley, not the blower pulley. Replacing the blower pulley requires a smaller pulley, and that will reduce the surface area contacted by the belt, increasing the chance of slippage.
Quote:
Also when swapping out the pulleys do we need to get different size belts too?
You will not need a different belt with the replacement jackshaft pulley. I don't know if you would need a different belt if you replaced both, but I doubt it.
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I will probably be doing 440cc injectors
A good choice for 6 psi. I personally would not feel comfortable with 440s for 9 psi on stock internals. However, I'm not certain if larger would be necessary for it.
I would think that the 440cc injectors and the JR fuel pump would be able to handle 12psi too? If I eventually want to do both wouldnt 440cc injectors be fine?(My equation also has the AEM EMS and a wideband O2 sensor eventually for the automapping feature onboard).
Also if I wanted to do 12psi what mods need to be done to the blower itself? 12psi is probably going to be my goal in the end. Its winter, so the car isnt gonna be driven anymore, so let me know!
All I am saying is that I would not be comfortable with 440s for 9 psi or higher on a JRSC with stock internals. You have to run really rich to keep it "safe" for the stock pistons (11:1), so I would rather have 550s to ensure I can deliver that. Personally, I would not run higher than 9 psi with a blower. If I wanted to run higher than that, I would get a turbo and enjoy the benefits of an intercooler.
At 6psi with 440cc RC injectors and Hondata I have a 12.0:1 to 12.5:1 all the way through the rpm band and I'm only running about 60% injector duty. I could easily handly 9psi at about 80% duty cycle and run an 11.0:1. I'm not sure if I could run the stock fuel pump with that setup but with the Walbro it isn't a problem. At 12psi it might be a stress on the injectors to get to an 11 A/F ratio. I do agree, that if you want to run over 9psi then a turbo might be the way to go. I don't even see myself going to 9psi for quite a long time if ever. I'm very happy at 6psi right now.
Well first off, I am sending out the SC itself to ENDYN to get fully reworked and ceramic coated. I am going to build up my spare block to be eventually replaced. So 550cc injectors may be the way to go with 12psi?? Am I looking to hit a 11:1 a/f ratio?? How do u guys know it needs to be at least 11:1 at 12psi?? Is there a chart or something for boost to air fuel ratio or something? The higher the boost the richer it needs to be? Please explain a bit. I am rusty still.
it doesn't have to do with how much boost, it has to do with the cooling properties of the fuel. the richer the mixture, the cooler it burns. especially with nonintercooled boost, you want it as rich as possible while still making power and running well. (too rich will foul your sensors and cat and eventually wash the cylinder walls, not good.)
11.0:1 is definitely on the safe side, if i were in your shoes (which i wouldn't be, i don't trust the blower/temps past 12psi, endyn or not) i would shoot for 11.0-11.5:1. i tuned my car to about 12.0:1 at 9psi.
440s will not be sufficient for 12psi. truthfully, for this setup, i might go even bigger than 550s.
Quote:
Originally posted by Ritteri Well first off, I am sending out the SC itself to ENDYN to get fully reworked and ceramic coated. I am going to build up my spare block to be eventually replaced. So 550cc injectors may be the way to go with 12psi?? Am I looking to hit a 11:1 a/f ratio?? How do u guys know it needs to be at least 11:1 at 12psi?? Is there a chart or something for boost to air fuel ratio or something? The hig
still has a J&S Ultra Safeguard version 1 for sale. Perfect for a JRSCed Prelude. PM me.
As soon as I get my wideband, that pulley is going on the car 
I can't wait.