GSC S1 vs S2 for daily drivability, and my goals, for Evo VIII
Oct 6, 2016, 12:10 PM
#1
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Thread Starter
GSC S1 vs S2 for daily drivability, and my goals, for Evo VIII
Hey all. I'm coming with a question about cams today.
My head is coming off for a head gasket, and I figure now is as good as any time to rip the whole engine out, stick in new rings, gaskets, etc. As well as cams
Now I am stuck between the S1 and S2 cams. I've been reading deep in the "big cams little turbo" thread and am now conflicted. Based on the dyno chart in there, the S2's seem like the clear winner. However, my car is going to be used to it's full potential, IE snow trips, road trips, etc. I need the car to be as reliable as possible.
That being said, I am wondering if the S2 cams are a bit too aggressive in the way the car will do (potentially at times very cold) cold starts. Also worried about the idle, and slightly worried about MPG. (It's already awful, but would prefer it to not get way more awful).
My goals for the car are to make it as responsive as possible with as quick a spool as I can get. This can be seen with the mod route I have taken, ETS UICP and LICP, 3" from turbo back, Works throttle body, etc. I'm not going for huge power, most I'd like to push is 400Awhp, more realistically 350Awhp as I currently have a stock 6 speed.
Can anyone share some insight? I've seen the dyno data, now I'd like to hear some real world experiences.
My head is coming off for a head gasket, and I figure now is as good as any time to rip the whole engine out, stick in new rings, gaskets, etc. As well as cams
Now I am stuck between the S1 and S2 cams. I've been reading deep in the "big cams little turbo" thread and am now conflicted. Based on the dyno chart in there, the S2's seem like the clear winner. However, my car is going to be used to it's full potential, IE snow trips, road trips, etc. I need the car to be as reliable as possible.
That being said, I am wondering if the S2 cams are a bit too aggressive in the way the car will do (potentially at times very cold) cold starts. Also worried about the idle, and slightly worried about MPG. (It's already awful, but would prefer it to not get way more awful).
My goals for the car are to make it as responsive as possible with as quick a spool as I can get. This can be seen with the mod route I have taken, ETS UICP and LICP, 3" from turbo back, Works throttle body, etc. I'm not going for huge power, most I'd like to push is 400Awhp, more realistically 350Awhp as I currently have a stock 6 speed.
Can anyone share some insight? I've seen the dyno data, now I'd like to hear some real world experiences.
Oct 6, 2016, 12:16 PM
#2
EvoM Guru
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For your power goals, I would go with S1's.
Oct 6, 2016, 12:18 PM
#3
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Oct 6, 2016, 12:22 PM
#4
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Smooth idle vs very lopey idle for the S2's. Better off boost/low rpm torque and response. And you just don't need a bigger cam for your power goals. S2's are for guys going after 600whp, or trying to go max effort on a smaller turbo. You're clearly not trying to do a max effort small turbo build.
Oct 6, 2016, 12:45 PM
#6
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Thread Starter
Thanks guys. Perfect reasoning to back up suggestions. I am sold on the S1's. Much appreciated!
On a side note... "better off boost response" how about the on boost power over stock?
On a side note... "better off boost response" how about the on boost power over stock?
Oct 6, 2016, 12:50 PM
#7
EvoM Guru
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You'll probably pick up around 25whp-30whp.
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Oct 6, 2016, 02:10 PM
#10
EvoM Guru
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They don't create an "issue", the car drives fine except being a little bucky in 1st gear below 2k rpms, they just don't make as much off boost torque. The car feels lazier when you're not in boost. Especially on an 8. If you have a 9 (MIVEC), I would say S2's for sure.
Oct 6, 2016, 02:21 PM
#11
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Thread Starter
They don't create an "issue", the car drives fine except being a little bucky in 1st gear below 2k rpms, they just don't make as much off boost torque. The car feels lazier when you're not in boost. Especially on an 8. If you have a 9 (MIVEC), I would say S2's for sure.
Oct 6, 2016, 04:55 PM
#12
Coming from someone who daily drives with s2's in their 8, I don't agree with the "bucky" below 2k in 1st gear. As far as idle a little tuning can go a long way in making it less lopey, and smooth. I know the goal isn't max power here, but is more low end torque the ultimate goal here, like in a autox type of car? Where torque is needed quickly and helps push through the track? If so yes s1's def fit the bill here.
Now if the goal is an all around power car, then with the small turbo you'll have the power low, but with the s2's it'll allow the power to pull through the entire rev range.
Now if the goal is an all around power car, then with the small turbo you'll have the power low, but with the s2's it'll allow the power to pull through the entire rev range.
Oct 6, 2016, 05:10 PM
#13
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Thread Starter
Coming from someone who daily drives with s2's in their 8, I don't agree with the "bucky" below 2k in 1st gear. As far as idle a little tuning can go a long way in making it less lopey, and smooth. I know the goal isn't max power here, but is more low end torque the ultimate goal here, like in a autox type of car? Where torque is needed quickly and helps push through the track? If so yes s1's def fit the bill here.
Now if the goal is an all around power car, then with the small turbo you'll have the power low, but with the s2's it'll allow the power to pull through the entire rev range.
Now if the goal is an all around power car, then with the small turbo you'll have the power low, but with the s2's it'll allow the power to pull through the entire rev range.
I guess I should have mentioned the type of spirited driving I do.
I mostly do canyon/windy/twisty road driving. I don't do any autocross with this car.
Priorities are strong mid range and adding as much response as possible.
Oct 6, 2016, 05:20 PM
#15
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