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rusty#1
05-04-2008, 03:22 PM
what do i need to do to fit the type s jrsc in the ep i have searched and couldn't find anything

shadowmd
05-04-2008, 03:45 PM
ur gona need to do a decent amount of work. like notch the front rad support.....for starters...ur better off gettin an ep s/c. its all the same just fits a hell of a lot better...but im guessin u already have the dc-5 s/c?

rusty#1
05-04-2008, 03:55 PM
doesn't the dc5 one give more power thats why it can run a smaller pulley so just the radiator support i thought there was more to it like the power steering??

shadowmd
05-04-2008, 03:57 PM
nope, the chargers are the same. its just the manifolds that are a different design. u can run smaller pullies like 3.2" = 9psi on the ep charger just fine. and the ep doesn't have "power steering", its EPS (electronic power steering)

rusty#1
05-04-2008, 04:03 PM
i thought the smaller pulleys out revs the ep charger thats why u cant run a type s crank pulley on an ep charger cuz it out revs it and could damage it and thats why the ep has a larger crank pulley ??

shadowmd
05-04-2008, 04:04 PM
nope, the charers are exactly the same. same internals, everything. u just need a different size belt than an a3 would run would the s/c. since the a2 crank is smaller. thats it. there is a member on here with a k20a and it was s/c (he took it off for personal reasons) but it was runnin like 9psi (3.2" pulley) ran good too!

here is his car, keep in mind that its un-tuned....he should be trappin 110mph and be in the high 12's if it was tuned

http://ephatch.com/forum/showthread.php?t=43383

bdooley
05-04-2008, 04:06 PM
doesn't the dc5 one give more power thats why it can run a smaller pulley so just the radiator support i thought there was more to it like the power steering??

no its just the way its designed. the ep one will fit and you can get the pulley boys pulley whichever one you want. the a2 can handle the smaller pulleys whereas the a3 can go to a 3.8" max before needing an intercooler/aftercooler.

rusty#1
05-04-2008, 05:00 PM
so both superchargers would make the same power?

rusty#1
05-04-2008, 06:03 PM
what would happen if i ran the smaller crank thats on the type s with the ep jrsc it would cause damage to the ep charger right

Lucid Moments
05-04-2008, 06:41 PM
so both superchargers would make the same power?

Supposedly the RSX-s supercharger manifold flows a little better, and might make a little more power. Nobody that I am aware of has done back to back dynos so nobody knows for sure. Even if it does flow better which I don't doubt, I doubt the A3 head can take advantage of that better flow.


what would happen if i ran the smaller crank thats on the type s with the ep jrsc it would cause damage to the ep charger right

Wrong. No damage to the ep blower. What would happen is that you would make less boost, and so less power if that was the only thing you changed.

I would have to check on the issue of the K20A3 having a smaller crank pulley than the K20A2. I thought they ran the same crank pulley's, and that the differences were the JDM K20A runs a smaller one, and the K24's run a larger one. I've not had them side by side and measured them myself so I'm not sure.

shadowmd
05-04-2008, 08:11 PM
im pretty sure the a2 and the a3 crank pulies are different sizes. thats one of the reasons i didnt put the jrsc on my a2. couldnt find a belt size cause my crank pulley is different than an a3

rusty#1
05-04-2008, 09:03 PM
what if u get a P&p do you think that u will see more power from the a2 charger then with the ep charger hey guys do u kno whats the smallest pulley on a a2 charger i kno for the ep is 3.7

shadowmd
05-05-2008, 04:28 AM
there is a 3" pulley that = 11psi, but seriosuly, ITS NOT worth gettin the a2 s/c. way too much work to make it fit and u really won't gain ANYTHING over an ep s/c

Lucid Moments
05-05-2008, 04:44 AM
what if u get a P&p do you think that u will see more power from the a2 charger then with the ep charger hey guys do u kno whats the smallest pulley on a a2 charger i kno for the ep is 3.7

I think you are getting confused on where the difference is so please repeat after me. The charger is the same, the charger is the same, the charger is the same.:mbiggrin:

Seriously though, both the RSX-s, and the EP3 us the Eaton M62 blower assembly. What allows the RSX-s to run smaller pulleys and to make more power is that the head on the RSX-s flows better, it is running higher compression pistons so it starts out making more power. The difference is not in the charger, the difference is in the motor.

BlownSi05
05-05-2008, 05:25 AM
first of all, a 3.2" pulley on the jrsc setup in an ep3 = boom:mconfused:
3.8" pulley in the ep3 gets you 9-10 psi and the 3.7" gets 10-11 psi.

second, the blowers are identical. it is the intake mani that comes with the blower that is different. the rsx intake actually has decent runners which ours lack. it is a more efficient setup and produces a little more power, but i do not see it worth cutting my radiator support.

mustclime
05-05-2008, 05:34 AM
man has the knowlage level gone down around here.......:mrolleyes:

jimmyjames
05-05-2008, 06:01 AM
Blowers are the same unit, RSX or EP.
RSX-S crank pulley ~ 4.4"
EP crank pulley ~ 4.7"
Smaller the crank pulley, the slower the belt, the smaller pulley on the SC needed to make the same power.

To make the RSX unit fit, you'll need to cut the radiator support a little. It does not need to be cut up a bunch as previously thought but some nonetheless.

Find a step by step of the whole process including pictures below (reposted from K20A.org - http://www.k20a.org/forum/showthread.php?t=9670 )
Note that this install was done on a Civic Type R so that is why the smaller pulley is used.


Hi guys, I thought maybe someone wants to check out what I've been doing for the past few days so here we go with the pictures :)

Finally the Jackson Racing RSX-S Race -kit arrived (without k-pro since I've already got one):
http://www.na-soft.com/gallery/albums/jrsc/014_supercharger_arrived_1.sized.jpg

Installation hardware, most of which will not be used since I have neither A/C nor hydraulic power steering :p
http://www.na-soft.com/gallery/albums/jrsc/015_supercharger_arrived_2.sized.jpg

Supercharger assembly was nicely packed in foam
http://www.na-soft.com/gallery/albums/jrsc/016_supercharger_arrived_3.sized.jpg

Pulley Boys 3.2" pulley
http://www.na-soft.com/gallery/albums/jrsc/012_pulley.sized.jpg

RSX-S AEM CAI (bigger bore than the SI kit).. this is used to replace the AEM V2
http://www.na-soft.com/gallery/albums/jrsc/013_aem_cai.sized.jpg

I took all of the tools I own and headed to the garage
http://www.na-soft.com/gallery/albums/jrsc/017_tools_loaded.sized.jpg

Old AEM V2 intake removed
http://www.na-soft.com/gallery/albums/jrsc/019_intake_removed.sized.jpg

Disconnected all of the TB connectors and labeled them
http://www.na-soft.com/gallery/albums/jrsc/018_removed_tb_connectors.sized.jpg

Some of the tools that are needed, notice the Facom Ferrari ratchet set :)
http://www.na-soft.com/gallery/albums/jrsc/020_tools.sized.jpg

Working all nights...
http://www.na-soft.com/gallery/albums/jrsc/021_working.sized.jpg

I plugged the coolant lines with some bolts
http://www.na-soft.com/gallery/albums/jrsc/022_plugged_coolant_lines.sized.jpg

Removed throttle body
http://www.na-soft.com/gallery/albums/jrsc/023_removed_tb_1.sized.jpg

Removed throttle body - Another shot
http://www.na-soft.com/gallery/albums/jrsc/024_removed_tb_2.sized.jpg

Removed throttle body - Yet another shot
http://www.na-soft.com/gallery/albums/jrsc/025_removed_tb_3.sized.jpg

This is where the TB used to be mounted
http://www.na-soft.com/gallery/albums/jrsc/026_removed_tb_4.sized.jpg

Disconnected fuel injector harness from the injectors and fuel rail
http://www.na-soft.com/gallery/albums/jrsc/027_fuel_injector_harness_1.sized.jpg

Removed bolt to get the fuel injector harness free from the intake manifold
http://www.na-soft.com/gallery/albums/jrsc/028_fuel_injector_harness_2.sized.jpg

Fuel line carefully removed in order to prevent the green clip from breaking
http://www.na-soft.com/gallery/albums/jrsc/029_fuel_line_removal.sized.jpg

Removing intake manifold studs using the infamous double-nutter technique :)
http://www.na-soft.com/gallery/albums/jrsc/030_im_removal_1.sized.jpg

Almost there...
http://www.na-soft.com/gallery/albums/jrsc/031_im_removal_2.sized.jpg

Thank goodness I bought lot's of extensions and joints to get all of the IM bolts open
http://www.na-soft.com/gallery/albums/jrsc/032_im_removal_3.sized.jpg

Intake manifold removed, almost time to start installing new parts
http://www.na-soft.com/gallery/albums/jrsc/033_im_removed.sized.jpg

jimmyjames
05-05-2008, 06:02 AM
Continued...

Old PRB intake manifold.. this will be stored safely since the car needs to be returned back to stock for MOT in 2008 :(
http://www.na-soft.com/gallery/albums/jrsc/034_old_prb_im.sized.jpg

After a whole lot of banging, cursing and some sawing, the supercharger was dropped in and bolted to the engine
http://www.na-soft.com/gallery/albums/jrsc/035_supercharged_bolted_in_1.sized.jpg

Closer shot of the mandatory tool needed to make a RSX-S JRSC fit into EP3 :)
http://www.na-soft.com/gallery/albums/jrsc/036_supercharged_bolted_in_2.sized.jpg

Installed the new pulley and belt, but...
http://www.na-soft.com/gallery/albums/jrsc/037_installed_belt_and_pulley.sized.jpg

Uh Oh, the 50.5" belt I had bought based purely on a guess was a tad too long :o
http://www.na-soft.com/gallery/albums/jrsc/038_uh_oh.sized.jpg

Next job, installing the bracket under the SC.. no pictures of that procedure though since it's not really suitable for public viewing due to massive amounts of curses needed :down:
http://www.na-soft.com/gallery/albums/jrsc/039_halfway_there.sized.jpg

New injector clips were soldered for the RC 550cc's
http://www.na-soft.com/gallery/albums/jrsc/040_soldering_injector_clips_1.sized.jpg

Ah, so nicely soldered and shrink-wrapped.. looks all OEM :)
http://www.na-soft.com/gallery/albums/jrsc/041_soldering_injector_clips_2.sized.jpg

All clips done, just put this picture here because I liked the colors :)
http://www.na-soft.com/gallery/albums/jrsc/042_soldering_injector_clips_3.sized.jpg

RC 550cc injectors were installed into the rail and then plugged into the manifold
http://www.na-soft.com/gallery/albums/jrsc/043_550cc_injectors_1.sized.jpg

Injectors just aching to spray some fuel into the engine
http://www.na-soft.com/gallery/albums/jrsc/044_550cc_injectors_2.sized.jpg

Reconnected throttle body and all of the electricals, MAP spacer, new vacuum hose, PCV hose, power brake hose etc.
http://www.na-soft.com/gallery/albums/jrsc/045_connected_tb_and_hoses.sized.jpg

Connected injector harness and clips into the injectors
http://www.na-soft.com/gallery/albums/jrsc/046_connected_injector_harness.sized.jpg

TB bolted, next job is the AEM RSX-S CAI
http://www.na-soft.com/gallery/albums/jrsc/047_bolted_tb.sized.jpg

Angle grinder needed for installing the RSX-S AEM cold air intake. Notice the removed finger protection due to me buying too big cutting wheels :o
http://www.na-soft.com/gallery/albums/jrsc/048_tool_needed_for_next_job.sized.jpg

Modified CAI fits now. Needed to make room for it, drill and tap a hole for the support bracket and also shorten the CAI a little bit
http://www.na-soft.com/gallery/albums/jrsc/049_rsx_aem_cai_modified.sized.jpg

A tiny piece was cut out of the shifter weight to make more room for the CAI. People running these things in stock intake manifolds have much more room here.. I guess the JRSC moves the TB somewhat :confused:
http://www.na-soft.com/gallery/albums/jrsc/050_rsx_aem_cai_clearance.sized.jpg

Closer shot of the new found space :)
http://www.na-soft.com/gallery/albums/jrsc/051_rsx_aem_cai_clearance_close.sized.jpg

This is how the filter sits inside wheel arch. Needed to shorten the CAI and drill and tap a hole for the support rubber
http://www.na-soft.com/gallery/albums/jrsc/052_filter_inside_fender.sized.jpg

Closer look of the bracket
http://www.na-soft.com/gallery/albums/jrsc/053_rsx_aem_cai_tapped_spacer.sized.jpg

Install almost complete, shorter belt needed and Denso IK24 spark plugs need to be installed
http://www.na-soft.com/gallery/albums/jrsc/054_almost_finished.sized.jpg


Hope you enjoyed the pictures.. I sure as hell did not enjoy installing this beast :silly:

kaisertj
05-05-2008, 10:49 AM
man has the knowlage level gone down around here.......:mrolleyes:

:mangel: *Knowledge* Might want to spell check, especially this nature of post :mbiggrin:

MugenReplica
05-05-2008, 11:46 AM
You also need a NON RSX PS tensioner. So another $100 or so on top of the JRSC price.

Or make an auto tensioner.

kaisertj
05-05-2008, 11:51 AM
You also need a NON RSX PS tensioner. So another $100 or so on top of the JRSC price.

Or make an auto tensioner.

Is this auto-tensioner possible on a a3 jrsc? Would love to stop messing with a tensioner bolt. Much like the comptech tensioner design?

MugenReplica
05-05-2008, 11:52 AM
Is this auto-tensioner possible on a a3 jrsc? Would love to stop messing with a tensioner bolt. Much like the comptech tensioner?

Custom bracket and plate are needed. Gotta fab one up yourself unfortunately.:mfrown:

kaisertj
05-05-2008, 11:53 AM
Custom bracket and plate are needed. Gotta fab one up yourself unfortunately.:mfrown:

Nice! are there any existing plans, attempts, or DIY's?

MugenReplica
05-05-2008, 11:57 AM
Nice! are there any existing plans, attempts, or DIY's?

Joe McCarthy originally did it on his K20a Lotus Elise. A few others were made afterwards based on his. None were commercial. There is/was a group buy going for awhile on another forum price was $250 for the bracket, plate, and supposedly modifications done to the EPS tensioner. Dunno.........





........all I know is I have one sitting on my desk at my house used on a JRSC up to 15psi with E85.:mangel:

jimmyjames
05-05-2008, 12:05 PM
Nice! are there any existing plans, attempts, or DIY's?I have a plan that will hopefully require little to no cutting/fabricating/changes to the JRSC idler assembly.
Could turn out worthless but i'll post it up when I have something concrete.

MugenReplica
05-05-2008, 12:09 PM
I have a plan that will hopefully require little to no cutting/fabricating/changes to the JRSC idler assembly.
Could turn out worthless but i'll post it up when I have something concrete.

You still wanna hang out in Skanateles? I'll bring the tensioner and plate with me for the meetup.:mwink:

jimmyjames
05-05-2008, 12:41 PM
You still wanna hang out in Skanateles? I'll bring the tensioner and plate with me for the meetup.:mwink:Yes, definitely. Do you know if that plate and tensioner works with the EP JRSC fit in present form? Since it was designed for the RSX JRSC, wasn't sure if the orientation of the charger made a difference with fitment.

MugenReplica
05-05-2008, 12:44 PM
Yes, definitely. Do you know if that plate and tensioner works with the EP JRSC fit in present form? Since it was designed for the RSX JRSC, wasn't sure if the orientation of the charger made a difference with fitment.

You bringing your Ep Jimmy? We'll install it as a test fit for yours if its not already on mine.:mbiggrin:

jimmyjames
05-05-2008, 01:24 PM
You bringing your Ep Jimmy? We'll install it as a test fit for yours if its not already on mine.:mbiggrin:Dibs

blackbelt
05-05-2008, 04:13 PM
I am getting ready to buy a SC and I have an A2. I am glad I read this.

MugenReplica
05-05-2008, 08:09 PM
I am getting ready to buy a SC and I have an A2. I am glad I read this.

You don't need the RSX JRSC with a K20a2. Just use the 2002-2005 Civic Si JRSC since it has the correct tensioner. Besides as a whole, one manifold really doesn't flow much better than the other.