GSC S1 vs S2 for daily drivability, and my goals, for Evo VIII
Oct 6, 2016, 06:09 PM
#17
I'm running S1's on a stock turbo with full bolt-ons. The idle needed to be bumped up to 1000rpm's for the cams and aside from that (and the cammy idle sound) I honestly can't tell the difference from stock (in terms of drivability) aside from more power everywhere. You'll like them!
Last edited by mctonyb; Oct 6, 2016 at 06:14 PM.
Oct 6, 2016, 11:05 PM
#18
Newbie
Thread Starter
I'm running S1's on a stock turbo with full bolt-ons. The idle needed to be bumped up to 1000rpm's for the cams and aside from that (and the cammy idle sound) I honestly can't tell the difference from stock (in terms of drivability) aside from more power everywhere. You'll like them!
Oct 7, 2016, 08:49 AM
#19
My car picked up almost 30whp with the cams. I do hit max HP at ~7100 RPM and max TQ at 5200 RPM and the curve isn't all that different from when the car had stock cams. The curve shifted slightly up in the RPM band (by about 300 RPM) but that's it.
Netting the whole thing out, the car doesn't drive drastically different from stock but it just makes more power. Hope that helps.
Netting the whole thing out, the car doesn't drive drastically different from stock but it just makes more power. Hope that helps.
Oct 7, 2016, 09:28 AM
#20
EvoM Guru
iTrader: (1)
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.
It's hard to "fix" a lopey idle without VVT. You can enrichen the AFR at idle, but that requires the car to be run in open loop at idle (unless you have an aftermarket EMS that allows you to choose your AFR targets), which means idle AFR's won't be consistent across different temps and elevations. You can bump timing up some, but that can make the idle unstable (wanting to bounce up and down) if you add too much.
Oct 7, 2016, 12:42 PM
#21
go with the s1's.
will you give up top end power, yes.
will you still be able to drive fine in the city with s2's, yes.
will the s1's behave better in parking lot, lower power applications, yes.
it's all a compromise.... you need to decide. either cam you choose will make more power than stock cams!
will you give up top end power, yes.
will you still be able to drive fine in the city with s2's, yes.
will the s1's behave better in parking lot, lower power applications, yes.
it's all a compromise.... you need to decide. either cam you choose will make more power than stock cams!
Oct 8, 2016, 06:15 PM
#22
didnt read all the replies.
i dd on s2s on a stock-ish 2.0. only mods are ported head and intake and aftermarket single valve springs.
it runs fine, i had to fiddle with my mivec just to get the idle to sound rough and mean. before i did that it sounded stock.
man up.
i dd on s2s on a stock-ish 2.0. only mods are ported head and intake and aftermarket single valve springs.
it runs fine, i had to fiddle with my mivec just to get the idle to sound rough and mean. before i did that it sounded stock.
man up.
Oct 9, 2016, 09:40 PM
#23
EvoM Guru
iTrader: (1)
Originally Posted by TrendSetter
didnt read all the replies.
i dd on s2s on a stock-ish 2.0. only mods are ported head and intake and aftermarket single valve springs.
it runs fine, i had to fiddle with my mivec just to get the idle to sound rough and mean. before i did that it sounded stock.
man up.
i dd on s2s on a stock-ish 2.0. only mods are ported head and intake and aftermarket single valve springs.
it runs fine, i had to fiddle with my mivec just to get the idle to sound rough and mean. before i did that it sounded stock.
man up.
Oct 10, 2016, 06:15 AM
#24
I went with S1's roughly 60k miles ago and haven't had any complaints. I'm on the stock turbo with bolt-ons and will probably stay that way until something stops working, or I have money to burn.
To me an Evo is a machine that is amazing at so many things that to tweak it too far one way is to hinder it in another. Personally, my car needs to perform in the rain, sun, & 18" of snow and I can say has, with a the right set of tires.
To me an Evo is a machine that is amazing at so many things that to tweak it too far one way is to hinder it in another. Personally, my car needs to perform in the rain, sun, & 18" of snow and I can say has, with a the right set of tires.
Oct 10, 2016, 08:54 AM
#26
EvoM Guru
iTrader: (1)
I love the lope too, but it's def not for everybody. My car has all poly motor mounts, and sitting at a stop it rocks my head back and forth. I get lots of comments from rando gearhead guys asking how big the cams are. Right after they ask me why my brakes are so loud...LOL
Last edited by letsgetthisdone; Oct 14, 2016 at 02:54 PM.
Oct 14, 2016, 02:02 PM
#27
Lol ^^ yes!
I can't wait to get my S2's in. Im going for a similar all around more power, but I have an HTA71. I'm wanting an awesome all around car that I can daily if I needed to (it's not my primary car) but still get the most out of the turbo on 93 with room to grow if I ever wanted to.
I agree with everyone here that S1 cams are probably what you're wanting. If I was on stock turbo and dailying it's what I'd do.
I can't wait for that cam lope at a stop light
I can't wait to get my S2's in. Im going for a similar all around more power, but I have an HTA71. I'm wanting an awesome all around car that I can daily if I needed to (it's not my primary car) but still get the most out of the turbo on 93 with room to grow if I ever wanted to.
I agree with everyone here that S1 cams are probably what you're wanting. If I was on stock turbo and dailying it's what I'd do.
I can't wait for that cam lope at a stop light
Oct 14, 2016, 09:03 PM
#29
Like others have said for your goals and DD the S1 is what you want. I've had them for about 4 years (~40k). Even with great tuning there is still a difference at idle vs stock (I'm an original owner of my VIII) so the S2s would be even more noticeable. They drive pretty good and give you good midrange for what you want to do.
Oct 15, 2016, 11:53 PM
#30
Newbie
Join Date: Nov 2012
Location: Safety Beach, Australia
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
Hey guys, is the install something that is hard to do in the driveway? I've watched a few videos and it looks easy enough. i cant seem much on bleeding the lifters though