JRSC Pulleys

[spider883]

for those of us with the jrsc u know we have a 4.4" sc pulley that makes 5.5lbs... some of u may know that the street version for the rsx-s comes with a 4" pulley and there race version comes with a 3.2" pulley.. so what im thinking of doing is buying a used 4" pulley off someone that got the 3.2" one and put it on and see what boost it will run.. might only give an extra .5-1 lb so it wont hurt the engine since with the jr powercard it makes the engine run rich anyways.. thoughts? comments?

[02SilverSiHB]

Originally posted by spider883
for those of us with the jrsc u know we have a 4.4" sc pulley that makes 5.5lbs... some of u may know that the street version for the rsx-s comes with a 4" pulley and there race version comes with a 3.2" pulley.. so what im thinking of doing is buying a used 4" pulley off someone that got the 3.2" one and put it on and see what boost it will run.. might only give an extra .5-1 lb so it wont hurt the engine since with the jr powercard it makes the engine run rich anyways.. thoughts? comments?

I've kind of thought about this myself...even thought about the 3.2 one :D So don't they run 5lbs of boost with the 4" pulley? I guess they run that with a smaller pulley because they have a power steering pulley to connect to..unlike us. So if they have 5lbs of boost at a 4" pulley and when they put a 3.2" pulley on and get 7lbs of boost, I'd say that every .4 is worth 1lb of boost? Not sure if I'm right or not on this. I'm sure there's a formula.

Anyway, if you get their 4" pulley, that would indeed mean you would end up with about 6.5...or 1lb over what you get. I haven't hooked up my boost gauge yet, so I'm not sure what I'm getting.

But before you do get that pulley, I'd look into making sure you are indeed running rich...which I'm sure we are, but to be safe, jump on dyno and get an a/f read out..then figure out if you want it. I hear it's easy to replace, just remove the passenger side headlight to get good access.

[02SilverSiHB]

actually, I just found out that the upgrade pulley for them is 3.4. I need to measure ours...are you sure it's 4.4 on ours?

Anyway, so the type s gained 1lb of boost for every .3" taken from the size of the pulley. So you're looking at about 1lb boost gain I guess.

[02SilverSiHB]

hhhmmm, shit, I was doing some more research, maybe you should just hold off until hondata comes out with a tune...1lb extra boost may not sound like a lot, but no reason to blow your engine with a non tuned engine with added boost

[spider883]

it says 4.4 on the pulley so thats what i figured.. ill measure it tommorow to check.. that would be funny if its 4" and all this talk is for nothing haha

[spider883]

what do u think if i used like an Safc and tuned it that way? hmmm need more research

[02SilverSiHB]

Originally posted by spider883
it says 4.4 on the pulley so thats what i figured.. ill measure it tommorow to check.. that would be funny if its 4" and all this talk is for nothing haha

ah :D then I guess it is eh :D

as for the safc, good idea also. But I feel hondata would be the best, just have to wait for it, I know it seems like forever from now. I say we email hondata all together and annoy them to release the damn reflash for us. I bet they have it done, they are just tuning other reflashes for a k20 pro for the k20a3

[spider883]

i cant wait for the base maps for the A3 on Kpro bc that is hopefully what ill be getting eventually.. i think the safc will suffice for now until that.. just have to find a 4" pulley now

[yomamaInMySi]

Would you still need the power card if you're using the SAFC?

[02SilverSiHB]

Originally posted by yomamaInMySi
Would you still need the power card if you're using the SAFC?

I would assume you would. All the power car does, is have a connected boost line to it. When you go into boost, the boost is sent to the power card, it then senses the boost and signals to the injectors to open up more to richin up the a/f...keeping it from detonation. so he would still need that imo...the afc will help for the higher rpms...where I think I'd have it tuned at. Because I wouldn't want just a tune at WOT with the sfc, when I don't drive around on WOT all the time...just my .2cent

[ALCT]

kinda OT sorry but I did a massive search and couldn't find an online reseller for Dayco belts, JR website does not carry part#5070630. any ideas?

[02SilverSiHB]

Originally posted by ALCT
kinda OT sorry but I did a massive search and couldn't find an online reseller for Dayco belts, JR website does not carry part#5070630. any ideas?

damn, you're trying to find extra belts...just in case also :D... no ideas. I was just thinking of buying some myself...so did you try calling jr?

[ALCT]

Originally posted by 02SilverSiHB
damn, you're trying to find extra belts...just in case also :D... no ideas. I was just thinking of buying some myself...so did you try calling jr?

Yeah, I will be driving to MD next week, better be safe thn sorry. I haven't called JR, I think I should.

[spider883]

well i found a safc for real cheap and i ordered the jr race header.. so now to find a used pulley to test it out and then to find out what belt size

[02SilverSiHB]

I know the jrsc'd type s's use the same belt, might be able to with your next setup...did you buy the safc already too?