Effects of valve lift - worth it going higher?
03-15-2014, 04:40 PM
Post: #11
Effects of valve lift - worth it going higher?
Where was peak torque with the ...138s? Wondering because I still fancy to switch to their ...148s or even 149s if peak isn't too high.

AE86 ex-daily
Visit this user's website Find all posts by this user
03-15-2014, 05:44 PM
Post: #12
Effects of valve lift - worth it going higher?
totta Crolla Wrote:Catcams say the same thing for their 9.5mm lift cams.
I guess you need to relieve some of the head casting for 10mm lift ?

Interesting question to ask....

@ 10mm of cam lift the cams DID just clear the castings..... Huh

[Image: AEU86 AE86 - Effects of valve lift - wor...ng higher?]

but not by enough... Ted's said .015" I couldn't get a feeler gauge in there... but that looked to be closer than .015" to me, so I just made sure all the lobes would not have any issues

[Image: AEU86 AE86 - Effects of valve lift - wor...ng higher?]


Teds also has valve springs (additional option for valve springs) theirs have seat pressures of 62#s. For comparison stock is 35#s, HKS is 32#s, Toda and TRD are 52#s

[Image: AEU86 AE86 - Effects of valve lift - wor...ng higher?]


**IF** you go with high lift, "short duration" cams, and you use high seat pressure valve springs.... I STRONGLY recommend a kevlar toothed timing belt.... Rotating those cams ,pressing down those springs adds CONSIDERABLE forces upon the timing belt....

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
Find all posts by this user
03-15-2014, 07:59 PM
Post: #13
Effects of valve lift - worth it going higher?
Well I never, HKS springs are lb rated lower than stock springs then.
I have not suffered valve float up to 8300rpm with HKS's and they allow at least 9.5mm lift so they are probably a good bet for sub 8500rpm and high lift cams. without putting undue stress on other components or robbing too much power.

An analogue brain in a digital World
Find all posts by this user
03-15-2014, 08:09 PM
Post: #14
Effects of valve lift - worth it going higher?
Bean Bandit Wrote:Where was peak torque with the ...138s? Wondering because I still fancy to switch to their ...148s or even 149s if peak isn't too high.
I will try to find the printout for you Bean.

An analogue brain in a digital World
Find all posts by this user
03-15-2014, 11:20 PM
Post: #15
Effects of valve lift - worth it going higher?
Totta... not sure WHICH (if there are different ones) HKS springs you have... but the ones we tested are only good to low/mid 8mm of lift....

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
Find all posts by this user
03-17-2014, 07:47 AM
Post: #16
Effects of valve lift - worth it going higher?
@oldskewltoy
Good point with the timing belt. Can you recommend one in particular?

This one sound serious:

http://www.rhdjapan.com/power-enterprise...a-4ag.html
Visit this user's website Find all posts by this user
03-17-2014, 09:12 AM
Post: #17
Effects of valve lift - worth it going higher?
harkes Wrote:@oldskewltoy
Good point with the timing belt. Can you recommend one in particular?

This one sound serious:

http://www.rhdjapan.com/power-enterprise...a-4ag.html

I got a TODA one but honestly either one of these will be fine...
http://perfectrun.jp/quick/qui_home.php?...&submit=GO
better prices than RHD

AE86 ex-daily
Visit this user's website Find all posts by this user
03-17-2014, 09:21 PM
Post: #18
Effects of valve lift - worth it going higher?
I'm pretty sure I used a Power Enterprises timing belt, likely purchased through horsepower freaks ($160 today)

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
Find all posts by this user


Possibly Related Threads...
Thread Author Replies Views Last Post
  4AGE Valve Buckets Scored Steller Engineering 2 451 10-06-2023 05:34 PM
Last Post: Steller Engineering
  20 Valve Blacktop smoking after engine flush - why? RolanTHUNDER 2 818 11-30-2022 12:09 PM
Last Post: RolanTHUNDER
  HKS valve springs totta Crolla 3 1,578 05-25-2022 10:24 PM
Last Post: oldeskewltoy
  Valve clearance leon205gti 7 7,916 11-25-2016 03:24 AM
Last Post: oldeskewltoy
  16v oversize valve seats harkes 9 11,317 09-20-2016 05:04 PM
Last Post: oldeskewltoy

Forum Jump:


User(s) browsing this thread: 1 Guest(s)

Contact Us | AEU86 | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication