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Old 05-16-2020, 02:08 PM   #376
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I'll be going with a brand new IAG long block with pretty much the same closed deck/Stage 5 heads/272cams. The old head/cams are pretty well aged at 7 years and the shortblock I've beat on it with 38psi for 4 years so it has done its job I'll be putting my up 110k mile IAG stage 5 heads and Kelford cams on the classifieds for a really low low price
Bad ass!

Are you going to have them add the downpipe wastegate while itís apart? IAG has the TIG skills, it would turn out perfect.

Iíll be doing it soon, I just need to pick up the 60mm tial WG.
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Old 05-17-2020, 03:21 PM   #377
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Nope decided to cancel plans for the cutout, after driving 750whp on street tires, I can't keep the car straight I'm more than satisfied with the power at the moment as a daily driver
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Old 05-18-2020, 01:37 PM   #378
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Kelford Dual AVCS 272/268 11.30/10.50mm Lift Street Cams
Did you fail an intake or exhaust spring?
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Old 05-18-2020, 06:10 PM   #379
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Did you fail an intake or exhaust spring?
Intake valve spring
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Old 05-19-2020, 11:18 AM   #380
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Intake valve spring
I was guessing as much with the given lift.

So when should the new engine be going in?
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Old 05-19-2020, 08:22 PM   #381
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I had an intake GSC spring break on my intake cylinder 1. This was with ~40,000 miles last fall. I'm running the Ferrea dual springs now. We will see.
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Old 05-19-2020, 09:02 PM   #382
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I was guessing as much with the given lift.

So when should the new engine be going in?
IAG building long block now Iíd be really excited with the new motor but it is pretty much the same
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Old 05-19-2020, 09:03 PM   #383
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I had an intake GSC spring break on my intake cylinder 1. This was with ~40,000 miles last fall. I'm running the Ferrea dual springs now. We will see.
Looks like the life on the GSC spring is 40k
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Old 05-21-2020, 12:39 AM   #384
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Just curious, you had Manley springs originally, why'd you upgrade/change brands?

Are you going to run GSC again or try Ferrera out?
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Old 05-21-2020, 08:30 AM   #385
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Originally Posted by URABUS07WRX View Post
Just curious, you had Manley springs originally, why'd you upgrade/change brands?

Are you going to run GSC again or try Ferrera out?
IAG didn't have any Manley valve springs when I got my heads refreshed at that time

GSC never again.
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Old 05-21-2020, 11:33 AM   #386
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Just curious, you had Manley springs originally, why'd you upgrade/change brands?

Are you going to run GSC again or try Ferrera out?
Quote:
Originally Posted by user1029 View Post
IAG didn't have any Manley valve springs when I got my heads refreshed at that time

GSC never again.
I was impressed at the results you got out of the manley parts. I feel they're under represented. Especially with only 40k out of the GSC stuff. Ill be paying attention to your build this time for more real world testing!
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Old 05-21-2020, 02:52 PM   #387
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IMHO 45,000 miles out of a rig making 600whp minimum and 750whp maximum isnít exactly a bad thing.

Last edited by TDagen; 05-23-2020 at 02:47 AM.
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Old 05-21-2020, 06:20 PM   #388
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^^ Agreed that's a lot of miles on a built Subaru motor at those power levels lol.

Nonetheless have you considered getting the valve train Cryo treated? I looked into myself on my motor build since it's supposed to strength the parts. Figured why not since I plan on DD my car as well.
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Old 05-21-2020, 06:26 PM   #389
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All good points

If my new ferrea valvetrain fails, I will put the next head that will be built in the freezer before installation
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Old 05-21-2020, 07:36 PM   #390
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Quote:
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^^ Agreed that's a lot of miles on a built Subaru motor at those power levels lol.

Nonetheless have you considered getting the valve train Cryo treated? I looked into myself on my motor build since it's supposed to strength the parts. Figured why not since I plan on DD my car as well.
That's a lot of miles on a built anything. We can get more power out of these engines, but not much without a huge longevity loss. They are four cylinder engines, with a lot of torque divided by four rod journals. Lots happening in there. That being said, guess I won't use mine for many road trips.
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Old 05-22-2020, 08:14 AM   #391
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Ferrea dual springs may be onto something. Double the spring, double the security or double the rate of failure
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Old 05-22-2020, 11:44 AM   #392
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Did IAG recommend you go with the Ferrea dual springs?

Are they the Ferrea endurance dual springs? Specs look really good on those Ferreas.
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Old 05-22-2020, 03:31 PM   #393
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Double the spring, double the security
You lose one spring, you're still screwed.
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Old 05-22-2020, 04:22 PM   #394
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Did IAG recommend you go with the Ferrea dual springs?

Are they the Ferrea endurance dual springs? Specs look really good on those Ferreas.
Nope I chose them because they arenít GSC. If ferrea fails Iíll just quit modding cars and buy a Prius
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Old 05-22-2020, 10:57 PM   #395
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Nope I chose them because they arenít GSC. If ferrea fails Iíll just quit modding cars and buy a Prius

Last edited by TDagen; 05-23-2020 at 02:43 AM.
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Old 05-22-2020, 11:58 PM   #396
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^The Toyota Prius has pretty reliable valve springs Iíve heard
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Old 05-23-2020, 07:58 AM   #397
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It is a pain and also sucks the life out of you.

When mine failed, I was testing on our brand new Mainline Dyno. I made 5 or so 20lb pulls without issue. Then I turned up the boost and had a misfire. Next, I checked the plugs and reran it. That's when #1 went dead, and it broke. The event caused the spark plug to crack and sent it through my beloved turbo. Now I have an 8264S, which is cool, but I never planned on that.

The point is that just like you, I built a completely new motor. You don't just "slap" another valve and spring in there after something like this and expect it to last.

I'm writing this to share the experience and let you know we are #allinthistogether. Good luck to you. Hopefully, the Ferrera valvetrain will last longer.

I've always said that a true victory would be to run a motor until the rings wear out.
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Old 05-23-2020, 08:23 AM   #398
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I know the feeling I wanted my motor to run to a ripe old age of 60k miles before I got a new longblock but it died at 45k

Headgasket? Rings? Nope the valve spring was the last thing I'd expect to go. Damn you GSC.
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Old 05-23-2020, 11:45 AM   #399
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Quote:
Originally Posted by SW00P_G View Post
It is a pain and also sucks the life out of you.

When mine failed, I was testing on our brand new Mainline Dyno. I made 5 or so 20lb pulls without issue. Then I turned up the boost and had a misfire. Next, I checked the plugs and reran it. That's when #1 went dead, and it broke. The event caused the spark plug to crack and sent it through my beloved turbo. Now I have an 8264S, which is cool, but I never planned on that.

The point is that just like you, I built a completely new motor. You don't just "slap" another valve and spring in there after something like this and expect it to last.

I'm writing this to share the experience and let you know we are #allinthistogether. Good luck to you. Hopefully, the Ferrera valvetrain will last longer.

I've always said that a true victory would be to run a motor until the rings wear out.

You must have had one hell of a misfire to break off the spark plug

How many miles do you have on the Ferreas now? Endurance or the drag version? Now Iím really thinking about picking up a set of Ferreas and swapping them out after hearing your story!!! I havenít put my heads on the block yet, so good timing.

Thanks for sharing guys
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Old 05-23-2020, 12:30 PM   #400
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Also found some interesting info about the GSC beehives.
Quote:
Originally Posted by Scargod View Post
....
Are all beehive springs made with ovate (not round), wire? I ask because one article I read said "The drawback with ovate wire is that the spring forming process is more difficult to control. The wire must be carefully oriented within a certain number of degrees with respect to the spring axis; otherwise it can twist and end up in the wrong position. This may create interference problems as well as spring failure issues."
This suggests that quality and accuracy is critical in the making of beehive springs. Has anyone known of them failing?
Quote:
Originally Posted by JTPerryR1 View Post
Something else I'd like to add about the GSCs. We called them up to ask about the max boost 35 psi thing, because I want to run 38-40 psi. The EVO guys have an option for springs that have a higher max boost rating. They sent me shims to increase the seat pressure to be able to handle into the 40s. I haven't tried it yet, but I will soon and report back.
Quote:
Originally Posted by Scargod View Post
My head builder/machine shop, Heads Up, in NY, said that the installed seat pressure was only 76 psi. The pressure at 11 mm was only 186. He even went back and check the calibration of his spring tester.
I don't see this as a problem for my build and would think I would be safe for 8K with the Kelford 220-C cams. They have a 11.3mm peak intake lift and the springs measured 192 pounds @ 11.5.
BTW, my flow numbers were 288 intake and 219.2 exhaust.
Quote:
Originally Posted by TehSubaruHasAPosse View Post
for whats its worth, the Manley single springs I put in my heads where Beehives. Now I have the higher seat pressure kit (22185-16*) which is listed as * Single conical ovate wire.
(Iím guessing the Manley beehives are either a copy of the GSC or the same springs but packaged and sold by Manley)

Did anyone know GSC even offered a shim kit to go over 35psi? In the specs the GSC beehives say 35psi+, wth? Nothing noted about any shim kits for higher boost either.

Also looks like the GSC specs might have been inflated quite a bit.
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