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Old 22-05-2005, 10:01 PM   #1
SMOOKN
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Cam Adjustment

I was after a bit of info on how many degrees or clicks i can adjust my cams in order to achieve a bit better performance, safely that is. This is for an 89 model BG Astina SP.
Regards, Will
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Old 22-05-2005, 10:17 PM   #2
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You need to count how many teeth there are on the cam gears and divide that number into 360 to see how many degrees advance or retard you'll achieve. eg: if 60 teeth then 360/60=6 degrees of adjustment. On the BJs it's more like 8.3 degrees or there abouts. So it's not exactly very tuneable (and probably very bad!), since most adjustments are around 3-4 degrees on an adjustable cam gear...

Gav.
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Old 23-05-2005, 06:08 AM   #3
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it's half of the 60 teeth gav. the cam gears spin half as slow as the engine. if the cam gear had 60 teeth it would be 360x2/60 = 12 degrees.
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Old 23-05-2005, 07:35 AM   #4
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Even worse then. Don't do it Will, because more than likely you've got 42 or 48 teeth on the cams rather than 60, so that means a single tooth adjustment would be higher than the 12 degrees in Andrew's example. And adjustable cam gears generally only adjust to 12degrees at the most anyway.
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Old 23-05-2005, 08:00 AM   #5
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Yup Gav your right. I set my timing out by one tooth one and the car wouldn't idle. IT would fire on the starter motor, but anything after that it would just die.

Adjusable cam gears are the only way to go if you want to adjust standard cams.

However, i spoke to my tuner about these and he said the only realy purpose for them with standard cams is to move the power curve further up or further down the rev range. EG, FWD turbo cars would want their power further up the rev range to reduce low down wheel spin.
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Old 23-05-2005, 08:03 AM   #6
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Or on a modded NA car, you could bring the powerband down under your rev limit if it goes outside of it... Hello Andrew!
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Old 23-05-2005, 06:10 PM   #7
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I'd have to look at Daves service manual but I'm sure the cam wheels have some adjustment. My FE can be adjusted from 0 to -3 or +3
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Old 23-05-2005, 06:37 PM   #8
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Cam wheels on ours are a solid wheel with a static keyway. No adjustment at all.
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Old 23-05-2005, 07:41 PM   #9
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my timing has been advanced 5 degrees and i havent had any probblems so far
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Old 23-05-2005, 07:54 PM   #10
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you're talking about is the ignition timing, ie when the spark plug fires. cam timing is different, ie when the valves open and close.
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Old 23-05-2005, 08:06 PM   #11
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i think you'd get a better increase from having them shaved so that they peak quicker and longer.
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Old 23-05-2005, 08:47 PM   #12
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oh k kool.in that case i know nuthin lol
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340KW @ 24psi....................pb 13.3 @ 118mph (3rd gear issues + wheel spin)
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Old 23-05-2005, 08:57 PM   #13
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you're learning. we all had to learn once.
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Old 24-05-2005, 12:12 PM   #14
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Man you guys are quick, i didnt expect a reply for at least a few days. So u reckon i shouldnt adjust the timing at all? Basically the wrap is my friend bought an early 90 model LS Integra, did his timing and it made a huge difference, along with a couple other mods and im kind of in his shadow now. So if cam adjustment is out of the question where else can i pull a bit of power from without goin too crazy. Already got exhaust system and air filter, but i have to get some colder air to the air filter as it tends to suck up warm air. Any suggestions?
Will
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Old 24-05-2005, 12:37 PM   #15
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yeah dont adjust the cam. your mate probably adjusted the ignition timing. on the bg that is possible as you have a distributor
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Old 24-05-2005, 01:42 PM   #16
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A fuel pressure reg is probably the only other thing you can add to give you a bit more responce out of your engine...without as you say 'goin too crazy'
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Old 24-05-2005, 06:08 PM   #17
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Dan (Rupewrecht) has the HKS adjustable cam wheels. From memory they cost around the $260 mark (EACH) but you'd need a good mechanic to adjust them for you.
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Old 24-05-2005, 09:32 PM   #18
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Ye.. i think i might go fuel pressure reg soon enough, as long as its not gona break the bank.. dunno bout adjustable cams, id rather put them on a bigger better motor if i ever get it.. i might be picking up a custom intake pipe soon 2 and a nifty lil computer module that adjusts the intake sensor.. we'll see how that all works out.. thanks for the help chaps.. and nice ride Rob (if thats ur name) uve pretty much done everything to urs that ive been planning to do, i might get a bit of advice off u in the near future.. if ur willing to share that is.. sharing is caring.. come on.. ye so thanks anyway guys.. oh and one more thing any estimates on that fuel pressure reg, i know theres a few out there but just throw some numbers at me.. thanks
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Old 24-05-2005, 10:54 PM   #19
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Quote:
Originally Posted by mcwilly
my timing has been advanced 5 degrees and i havent had any probblems so far
has this proved to be of any power increase... even ever so slightly???

how far can the distributor be adjusted guys?

i had heard people say they had adjusted there timing by upto 14deg, which i thought was cam timing and i thought was ridiculous?!?!?! but if this is the disi it makes more sense... sut still would u go that far??

Jez
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Old 25-05-2005, 11:48 AM   #20
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Quote:
Originally Posted by SMOOKN
i might be picking up a custom intake pipe soon 2 and a nifty lil computer module that adjusts the intake sensor.. we'll see how that all works out.. thanks for the help chaps..
You didn't get this off ebay did ya??


Quote:
Originally Posted by SMOOKN
and nice ride Rob (if thats ur name) uve pretty much done everything to urs that ive been planning to do, i might get a bit of advice off u in the near future.. if ur willing to share that is.. sharing is caring.. come on..
Yeah no worries mate, any time.
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