Hwarang Performance Products Intake/Exhaust Cams

[yamaha]

I emailed HP.com a few weeks ago asking about the Intake and Exhaust Cams, they finally emailed me back, here's what they had to say:

The ECU would need to be either reprogrammed or a fuel system adapter like the APEXi S-AFC-II would need to be added to gain the fullest potential of these camshafts. We do NOT stock these camshafts here, we special order them from Korea. When properly tuned a typical boost in power from these camshafts would be in the range of 15 to 25 horsepower increase.

[Cypher]

heres what HP sent to me:

"The camshaft duration is listed, the lifts are 9.4mm and 10.2mm, depending on which cams you get. Original lift was about 7.9mm. The cams mostly need fuel adjustment. APEXi has a fuel controller, S-AFC-II"

i will post after i get more responses from them

[04RSElantraGT]

I know the owner I can help you guys out. I can get you info.

[yamaha]

You know the owner of the company or a guy that owns a set of these?

[Cypher]

slow2k can you chime in on what you have your SAFC set of at the moment? these cams are 264 duration as opposed to yours that you stated were 272 degree duration in a previous thread... and ford when working with the A/F ratio where do you want to keep it for optima hp gains?

[KeWLKaT]

I know the owner I can help you guys out. I can get you info.
autobot? :redface:

[slow 2K2GT]

Ok I will chime in a little here, I have my SAFC set to max -8% at 5000rpm and a gentle taper down to -5% at 1500rmp at high throttle. There isnt a whole lot of difference from my stock cam settings which were -7% @ 1500rom and 11% @ 5000rpm.

[yamaha]

Did you notice any power increases throughout the powerband when you put in your other cams, initial install time?

[Cypher]

did you randomly pick those number or is that what you feel gives you the best gains?

[Cypher]

heres something that was on my mind last night because i couldn't sleep... our cars run rich after the usual I/H/E mods. what is the problem with getting bigger cams? slow you trimmed back the fuel is that because with the cam the car runs even more rich? or since no one has gotten A/F ratios done with cams maybe its possible the car needs more fuel instead of pulling some out?

[slow 2K2GT]

no I pulled less fuel back with the cams than I did without. As for the numbers I picked them with how I felt the car was running at that setting. As for the power increase I only felt it from about 3200rpm and up, though the engine felt like it would make more power after the fuel cutoff point. As for install time it only took me about 3 hours including engine timing, not bad for me I guess.

[Cypher]

one of hte guys on newtib said that he felt the ecu adjusted accordingly to the cams and nothing else was needed... granted more power could be made with tuning but he felt it ran fine without a SAFC... thoughts?

[slow 2K2GT]

as we saw with Fords finding on the fuel tuner, he pulled -4% away @4000rpm which got rid of that power hump from 3800-4200rpm. I am sure that as with any modification, proper fuel tuning will yeild the best results.

[Cypher]

i never said that proper fuel tuning wouldn't give the best results i'm just saying that if you were without a fuel tuner the car will be ok it will adjust and according to the guy on NT.com his car runs like a normal daily driver after the ecu adapts

[slow 2K2GT]

ok well my bad then I guess I read your post wrong. I know with my car the idle is thrown off a bit and it really doesnt sound like a daily driver anymore. Again with the fuel thing, without drawing fuel away from the engine there is a very noticeable drop in power at certain points, with cams im sure that would be exagerated a little and make performance gains minimal.

[Cypher]

i know nothing of cams so what about the shims? would they cause a problem with these cams??? this may be a dumb question but i don't know anything about cams so if someone could explain what shims are and what they do i'd appreciate it along with if they would need to be adjusted. :D

[slow 2K2GT]

Shims refer to the type of lifter that our engine has, actually its shim over bucket. There are also hydraulic lifters which personally I think are better due to them not needing adjustments where as "shims" are measured to very precise sizes as needed. Shims...shims look like quaters on steroids. What they do is sit snugly up against the cam lobe so there is no smacking when the ramp opens and closes the valves. Check how stuff works (http://auto.howstuffworks.com/camshaft.htm) for a picture walk-through-talk-through of cams. Yes with new cams you need to have a valve adjustment, or in easier terms have your shims measured for proper tolerances/clearance.

[Cypher]

that sounds like a pain in the ***...

[Cypher]

is there a way to figure out the shims you would need???

[tharptroy]

nope, you'll have to install the cams dry, then measure the clearance with feeler gauges.

this link might help:
http://www.elantraxd.com/forums/showthread.php?t=7086&highlight=shim

[Cypher]

would the company selling them be able to tell me the correct size?

[tharptroy]

the differences are going to be pretty minute, so I doubt they will.

but call them and see. but you're going to be pissed if you buy 16 new shims and they dont get you to the right clearance.