DIY Cam Gear Install - Page 2 - Lexus IS Forum
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post #16 of 120 (permalink) Old 06-10-2009, 03:14 PM
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Thanks that looks pretty easy. Id still get a friend to help me with it. When you say "-4" you mean you are retarding the timing??
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post #17 of 120 (permalink) Old 06-10-2009, 03:35 PM Thread Starter
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Yes thats setting the exhaust cam gear to -4 which is retarding it.

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post #18 of 120 (permalink) Old 06-10-2009, 03:54 PM
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do you guys advise this cam gear setting with stock headers?...sorry go fast newb question...

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post #19 of 120 (permalink) Old 06-10-2009, 04:18 PM
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Quote:
Originally Posted by leonard_is300 View Post
Yes thats setting the exhaust cam gear to -4 which is retarding it.
Thanks man. How did you know what to set it at tho? I was thinking about just putting it on and when i have time, take it to a tuner and do a few pulls. Or can i just put it at -4? cuz i dont wanna lose power or f*** stuff up. Cuz i dont have the same setup as you.
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post #20 of 120 (permalink) Old 06-10-2009, 08:39 PM Thread Starter
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I did alot of reading and with our motors -4 yeilds the best results with an intake and exhaust. i have the Brian crower 264 cams and valve train, full exhaust, and intake i have the cam gear set to -4 and im all on the stock tune. slapping this cam gear on and setting it to -4 will be fine on stock tune but if your wanting to get the most out of your NA car and have an SAFC or something like that then a tune would not hurt at all!

A stock IS300 can have a cam gear set to -4 without messing anything up.

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post #21 of 120 (permalink) Old 06-10-2009, 09:14 PM
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^^^so stock headers and Apexi ws2 would be ok then to run with this cam gear setting????...lol...I am just not the sold to the risks of CEL's with headers...

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post #22 of 120 (permalink) Old 06-11-2009, 07:20 AM
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Great write up. Will come in handy soon. +rep to you

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post #23 of 120 (permalink) Old 06-11-2009, 09:56 AM
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Might be a dumb question, but how did you rotate the motor back 60 degress before TDC? Just bump the switch until you got the marks where you wanted them or a socket on the crankshaft?

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post #24 of 120 (permalink) Old 06-11-2009, 10:18 AM
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You will not get 5-7 hp by just adding a cam gear but should yield a few hp and a few ft/lbs of tq if it is tuned. At 0 degrees, it does nothing. Usually tuners will move a degree or a half degree at a time to see which one makes the most power. You can also run a cam gear on a stock IS300 as leonard_is300 said. For no CEL w/ a header, just install an o2 simulator.

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post #25 of 120 (permalink) Old 06-11-2009, 10:27 AM Thread Starter
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adding a cam gear will not really add power but it will smooth out the RPM band and make it more consistant

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post #26 of 120 (permalink) Old 06-11-2009, 10:32 AM
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^ exactly. I was never able to see what JUST the cam gear did as I added the header and SAFCII at the same time and never had a baseline. My most power was made at -6 degrees (retarded). The difference from -4 to -6 degrees was maybe a 1/2 hp or 1 hp I don't remember exactly. It was a little over 200 rwhp on a mustang dyno w/ PLP-SFI Intake, Greddy Evo II cat-back exhaust, toyomoto header, titan exhaust cam gear to -6 degrees, safcII tuned. I never really noticed a difference in power with each individual mod because I got used to them but as a whole, it was definitely a fun car with all the collective mods.

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post #27 of 120 (permalink) Old 06-11-2009, 11:00 AM
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great info guys...I am still debating whether to go the headers with cam gear and safcII combo or just save money and go boost straight to save time and possible headaches...but this info will definitely help out.

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post #28 of 120 (permalink) Old 06-11-2009, 11:06 AM
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Boost = headaches. Get ready for them if you're going boost. That is normal when going forced induction on any car that doesn't come that way from the factory.

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post #29 of 120 (permalink) Old 06-11-2009, 08:53 PM
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^^^lol...tnx for the honesty...lets see how i feel when i decide to take the plunge

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post #30 of 120 (permalink) Old 06-12-2009, 12:22 AM
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Lol I read the first sentence and I got completely confused, something I would prolly never attempt, but it looked interesting . +rep for you!
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