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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 05-21-2014, 12:30 PM   #85
350matt
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To be honest chaps I doubt that 250Bhp is possible without increasing the revs and from what I've seen the valvetrain will spit its dummy out along with its followers if we stray much over 7700rpm

heavier springs obviously help but I think its going to need some different design of followers in there to cope with more revs
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Old 05-21-2014, 12:36 PM   #86
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Quote:
Originally Posted by 350matt View Post
To be honest chaps I doubt that 250Bhp is possible without increasing the revs and from what I've seen the valvetrain will spit its dummy out along with its followers if we stray much over 7700rpm

heavier springs obviously help but I think its going to need some different design of followers in there to cope with more revs
Do you have any proof of this? There is one supercharged car running around on the stock block revving out to 8000. I would think with a built NA block, new cams, and new valve springs, we should be able to safely get the revs OVER 9,000!!!!
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Old 05-21-2014, 01:16 PM   #87
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Originally Posted by mid_life_crisis View Post
I live north of Raleigh. According to the map I checked, I'd need to go to Durham or the south side of Raleigh. Both are considerably out of my way.
I live about 5 minutes from an E85 pump that's on glenwood where it hits duraleigh. It's a brand new station and I think it's a BP.
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Old 05-21-2014, 02:27 PM   #88
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I live about 5 minutes from an E85 pump that's on glenwood where it hits duraleigh. It's a brand new station and I think it's a BP.
That is too far out of my way. I work by Triangle Town Center and live north. If there were one in between or near either, I would go for it, but just not close enough for me.
I keep seeing references that it took a couple of tankfulls for the car to show a real improvement. Is this what you experienced?
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Old 05-21-2014, 04:27 PM   #89
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Yup. haven't heard a thing about it either.

The innovate thread hasn't been much help trying to gleen more information about it.
Delicious tuning have one, Also one on the Sprintex R&D car here in Perth Australia.
pm me if you want any information, i bug them on a regular basis.
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Old 05-21-2014, 04:43 PM   #90
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Originally Posted by Luckrider View Post
Do you have any proof of this? There is one supercharged car running around on the stock block revving out to 8000. I would think with a built NA block, new cams, and new valve springs, we should be able to safely get the revs OVER 9,000!!!!
But how many miles will it last?
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Old 05-21-2014, 04:48 PM   #91
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What does money have to do with any of this? Just because you can't afford it doesn't mean someone else can. Arguing against Cosworth because of money is like arguing against HRE or a BRZ because their a options that can do more with less money.

Cosworth sometimes takes a long time to release parts, because sometime engineering a part to the degree you want takes a bit of time. It's just how that works.

Here's Eri Hsu, who I respect more than most FFF, talking about the Cosworth VR38DETT piston:
http://www.motoiq.com/MagazineArticl...omponents.aspx

Here's some case studies by the firm producing these parts:
http://cosworth.com/about/case-studies/

Now please show me the history of whoever the hell else you are arguing is better because they're cheaper.
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Old 05-21-2014, 06:16 PM   #92
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But how many miles will it last?
exactly

the very occasional run on the street to high revs doesn't mean the engine is going to last 20K miles with 8000rpm +

having seen the follower arrangement there's no positive location for the follower
1 end sits on a cup the other end on the valve stem with the cam pushes against the roller it all relies on the forces balancing and good valve control

put the revs up past so the spring cover is marginal ( ie past 7650rpm) and the valve control will drop away and vibration will pass up from the valve seat impact and literately shake the follower off its post

now heavier springs will help but it really needs some positive location / hinge for the follower so it can't wiggle about and jump off its post
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Old 05-21-2014, 11:09 PM   #93
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Originally Posted by Luckrider View Post
Do you have any proof of this? There is one supercharged car running around on the stock block revving out to 8000. I would think with a built NA block, new cams, and new valve springs, we should be able to safely get the revs OVER 9,000!!!!
I know one car locally here by a well known tuner who floated a valve at high RPM with a turbo setup. Less than 8000 RPM but he's making 500+WHP. He just replaced the springs with a set of Kelford ones.
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Old 05-21-2014, 11:14 PM   #94
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I know one car locally here by a well known tuner who floated a valve at high RPM with a turbo setup. Less than 8000 RPM but he's making 500+WHP. He just replaced the springs with a set of Kelford ones.
Yup and moved the f*ck on to make more power. No care at all.

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Old 05-22-2014, 07:08 AM   #95
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My post was half a joke and half a wish with no proper prospect of it coming true. Even that supercharger's owner admits that he doesn't run it up past 7k much.
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Old 05-23-2014, 02:15 AM   #96
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A little bird told me that cosworth dealers already have some pricing and they are having some sort of release party on the 31st.

Also no final power numbers are out.

That's all I could get out of my guy, and it may be false info. :P

Just wanted to post and hopes ill be right?
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Old 05-23-2014, 04:16 AM   #97
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I don't think Cosworth will disappoint as does TRD. At Cosworth there is alot of R&D before somethign gets to the market, thus the time to market and the high price, but worth the quality and the benefits.
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Old 05-23-2014, 12:31 PM   #98
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yep there's an owners club event / official launch

http://www.gt86ownersclub.co.uk/foru...topic6333.html
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