are there any differences between JDM cams and USDM cams(not including type S). what about 5spd cams and auto tranny cams? What about type SH cams? i'v e searched and found answers but it was really mixed and did not get any definite answers.
Last edited by preludacris09; 10-09-2005 at 07:09 PM.
JDM and USDM there's no difference, Type-S there is a difference
Imagine 5speed swaps, I'm pretty sure the motor is the same, therefore cams the same
Type SH and Base, SH has differene cams, as well as headers, making that "extra" 5hp, but don't bother looking into Type SH cam swap into a base because it's useless.
^^ you're from the bay, so you must know blacktrax right? well i got my car dyno'd there recently and the results were 157hp and 136tq with intake and I/E. i think Jei said that it was pretty good considering i still had the auto tranny cams in there. that's why i wanted to know if there were any differences in the cams. Maybe Natalie can give her input, if she sees this.
okie i looked up info and im trying to confirm that the auto cams are smaller or if theyre the same. ive confirmed that the SH cam has a very slightly bigger mild lobe but the primary and secondaries are the same as the base.
ill keep checking and hopefully i can find out more by thursday.
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Last edited by dvsracergirl; 10-11-2005 at 08:09 PM.
We pulled two sets of SH cams and compared them to a set of base cams. The lobe height measured the same on the VTEC lobes. We didn't check valve timing events, but the heights are at least the same.
has anyone measured the auto cams??? what happened it that preludacris (Lon) has SS lude and we did a 5spd swap. were wondering about the cam difference since we didnt change anything in the engine.
base ss and base manual are gonna be the same...the exhaust cam on the sh model is different than the base due to the differing exhausts on said cars... There isnt much difference on them but according to the Helms manual for 97-98 preludes they do differ by a little.
base ss and base manual are gonna be the same...the exhaust cam on the sh model is different than the base due to the differing exhausts on said cars... There isnt much difference on them but according to the Helms manual for 97-98 preludes they do differ by a little.
Both exhaust & intake cams are different between base & SH.
Have you guys ever measured a set? We measured a set out of a 1998 SH vs. a later year model base engine. The lobe heights measured the same on the mid lobes.
If you look at the 1998 parts manual, the SH and base model cams have the same part numbers as well (although that doesn't prove much). I'm not sure about later year models.
Have you guys ever measured a set? We measured a set out of a 1998 SH vs. a later year model base engine. The lobe heights measured the same on the mid lobes.
If you look at the 1998 parts manual, the SH and base model cams have the same part numbers as well (although that doesn't prove much). I'm not sure about later year models.
you are incorrect. i personally have measured both...they are exactly like i listed in my previous post.
Have you guys ever measured a set? We measured a set out of a 1998 SH vs. a later year model base engine. The lobe heights measured the same on the mid lobes.
If you look at the 1998 parts manual, the SH and base model cams have the same part numbers as well (although that doesn't prove much). I'm not sure about later year models.
Are you just making this up to impress people? or did you grab the wrong parts? They are different.
I'm not sure what part numbers Majestic uses. I always order using the "long" Honda part numbers like what San Leandro uses. I haven't found any differences between the part numbers quoted out of SL's parts listing and my own Honda paper copy of the parts manual.
As for impressing people, you're not high on my "list of people to impress."
Now if I'm wrong (and maybe I am), please provide part numbers for both the Base and SH cams. I'd like to see what the dealer has in his system for those numbers and do a reverse look up.
Notice how close 3rd and 4th are? It's an obvious misprint. IIRC, the correct ratio for 4th is 1.034. I believe this mistake is in all editions of the Helms manual, but I could be wrong.
Another thing I recall is that the oil control orifices in the head are shown backwards. I ruined one installing it as shown in the Helms. I need to double check, but I'm pretty positive this was the case, unless I just wasn't paying close enough attention (which is always a possibility).
Rumor in the press was that the autos had different cams than the Base and SH.
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