GSC 280 cams 0r.....
Feb 12, 2011, 01:12 PM
#16
Here's the deal with cam that use. You want as much lift and as little duration as possible, unfortunately at 11.7mm 280+ is about as tight as it get's. As far as "dont use big cam on little turbo" theory, like it was stated, thats either old or downright wrong info. I have tried S2/S2 and S3/S2 combinations with a stock framed small turbo (full) and depending on cam timing there was no forfeit in torque, spool, or whatever. The original cams were a 5 year old set of gsc 264s with 70,000 miles on them, which had better spool than the old hks in the day. More interesting was when I had the s3 in the exhaust, with -2in and -2 ex the car had the fastes spool and hardest hitting torque it ever had. It would have broken parts eventually.
The only drawback using big cams (esp s3) is the idle with stock MAF, advancing the exhaust helps though.
The only drawback using big cams (esp s3) is the idle with stock MAF, advancing the exhaust helps though.
Feb 12, 2011, 05:03 PM
#18
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man i remember back in the day.
Mixing the 264/272/280 hks's were hott ****. all the OG's remember the topic's being BEAT to death on here..
oh and hks 280's were nono's on stock ecu
I was always under the impression that the more aggressive cam should be on the intake side though.. thought exhaust should be 80% of intake. This prolly is thrown out on the IX since you're advancing the intake and not the exhaust.
Mixing the 264/272/280 hks's were hott ****. all the OG's remember the topic's being BEAT to death on here..
oh and hks 280's were nono's on stock ecu
I was always under the impression that the more aggressive cam should be on the intake side though.. thought exhaust should be 80% of intake. This prolly is thrown out on the IX since you're advancing the intake and not the exhaust.
Feb 12, 2011, 05:29 PM
#19
Alot is relative to what turbo you are using as well. The turbo has to be able to make up for what you lose in overlap. That being said here is a car on S3s idling at 1000, though it does like 1200 a little better.
http://www.youtube.com/watch?v=mTOTgAhS-Q8
We tried this on a stock turbo IX and loss under 6800, but did pick up 33whp by 8k. Its always trade offs though so while you can do it, I recommend S3s (or equiv) for 2.4s and a Black and larger or a 2.0 and 3582HTA and larger. Also good luck on a MAF, SD is a requirement to have it work.
http://www.youtube.com/watch?v=mTOTgAhS-Q8
We tried this on a stock turbo IX and loss under 6800, but did pick up 33whp by 8k. Its always trade offs though so while you can do it, I recommend S3s (or equiv) for 2.4s and a Black and larger or a 2.0 and 3582HTA and larger. Also good luck on a MAF, SD is a requirement to have it work.
Feb 14, 2011, 07:04 PM
#23
Correct, S2s and either the full replacement spring and retainer or just the spring kit.
I am going to clarify my statement on "overcammed". I do not think it is hurting power, nor do I think that they very broad powerband hurts the driving experience. I think I could have done the same thing with S2s or very close on this particular car. When Cameron gets a V5 on the car it will be really easy to tell what the cams are doing. Most stock motor Evos that come in make about this power level on pump/meth (and a lot of meth) or E85. Most of them are doing it on a V5 though.
I think it idles better than a lot of S2 equipped VIIIs though for sure. I cant think of that broad a powerband and S2s really coming together in this combo either. If it wasnt a stock motor or it was a larger motor the cams really would come into their own. Since not just anyone seems to be able to make S3s work and the cars that really need them are going to be over 600whp anyway, I dont recommend them for everybody.
I really think you need an A plus tuner (Stock ECU, AEM, Motec, Haltech, etc.), some time, and a car that is going to make 600+whp as the ultimate goal. A 35R and larger is really what these are meant for, it just worked out that Cameron got some S3s on a Black and 2.0 instead of something like a 2.3 or 2.4 and a Black.
I am going to clarify my statement on "overcammed". I do not think it is hurting power, nor do I think that they very broad powerband hurts the driving experience. I think I could have done the same thing with S2s or very close on this particular car. When Cameron gets a V5 on the car it will be really easy to tell what the cams are doing. Most stock motor Evos that come in make about this power level on pump/meth (and a lot of meth) or E85. Most of them are doing it on a V5 though.
I think it idles better than a lot of S2 equipped VIIIs though for sure. I cant think of that broad a powerband and S2s really coming together in this combo either. If it wasnt a stock motor or it was a larger motor the cams really would come into their own. Since not just anyone seems to be able to make S3s work and the cars that really need them are going to be over 600whp anyway, I dont recommend them for everybody.
I really think you need an A plus tuner (Stock ECU, AEM, Motec, Haltech, etc.), some time, and a car that is going to make 600+whp as the ultimate goal. A 35R and larger is really what these are meant for, it just worked out that Cameron got some S3s on a Black and 2.0 instead of something like a 2.3 or 2.4 and a Black.
Feb 14, 2011, 07:17 PM
#24
Correct, S2s and either the full replacement spring and retainer or just the spring kit.
I am going to clarify my statement on "overcammed". I do not think it is hurting power, nor do I think that they very broad powerband hurts the driving experience. I think I could have done the same thing with S2s or very close on this particular car. When Cameron gets a V5 on the car it will be really easy to tell what the cams are doing. Most stock motor Evos that come in make about this power level on pump/meth (and a lot of meth) or E85. Most of them are doing it on a V5 though.
I think it idles better than a lot of S2 equipped VIIIs though for sure. I cant think of that broad a powerband and S2s really coming together in this combo either. If it wasnt a stock motor or it was a larger motor the cams really would come into their own. Since not just anyone seems to be able to make S3s work and the cars that really need them are going to be over 600whp anyway, I dont recommend them for everybody.
I really think you need an A plus tuner (Stock ECU, AEM, Motec, Haltech, etc.), some time, and a car that is going to make 600+whp as the ultimate goal. A 35R and larger is really what these are meant for, it just worked out that Cameron got some S3s on a Black and 2.0 instead of something like a 2.3 or 2.4 and a Black.
I am going to clarify my statement on "overcammed". I do not think it is hurting power, nor do I think that they very broad powerband hurts the driving experience. I think I could have done the same thing with S2s or very close on this particular car. When Cameron gets a V5 on the car it will be really easy to tell what the cams are doing. Most stock motor Evos that come in make about this power level on pump/meth (and a lot of meth) or E85. Most of them are doing it on a V5 though.
I think it idles better than a lot of S2 equipped VIIIs though for sure. I cant think of that broad a powerband and S2s really coming together in this combo either. If it wasnt a stock motor or it was a larger motor the cams really would come into their own. Since not just anyone seems to be able to make S3s work and the cars that really need them are going to be over 600whp anyway, I dont recommend them for everybody.
I really think you need an A plus tuner (Stock ECU, AEM, Motec, Haltech, etc.), some time, and a car that is going to make 600+whp as the ultimate goal. A 35R and larger is really what these are meant for, it just worked out that Cameron got some S3s on a Black and 2.0 instead of something like a 2.3 or 2.4 and a Black.
Feb 15, 2011, 03:14 AM
#25
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Night and day
10.5mm lift VS 11.7mm lift.
On a 2L 35R on low boost 20psi Revving very low rpms (gains would be much higher if revved out on a bigger displacement motor/turbo an/or more boost)
on the old 11.5mm grind the difference was 50whp
10.5mm lift VS 11.7mm lift.
On a 2L 35R on low boost 20psi Revving very low rpms (gains would be much higher if revved out on a bigger displacement motor/turbo an/or more boost)
on the old 11.5mm grind the difference was 50whp
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