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rmarr1980
Joined: 27 Nov 2006 Posts: 263 Location: Lincoln Feedback Score: 3
1991 Toyota MR2 Mk2 Turbo Rev1
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Posted: Sat Dec 16, 2006 12:06 am Post subject: [Mk2] [Turbo] Best Vernier Pully setting |
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Hi I just bought some Hks vernier pulleys and wandered if anyone knows what the best timing degree advance or retard?
If anyone has a set fitted what setting are they one and how far off was your ignition timing etc?
Cheers
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tops
Joined: 10 Aug 2006 Posts: 112 Location: ipswich Feedback Score: 0
1994 Toyota Celica
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Posted: Sat Dec 16, 2006 4:47 pm Post subject: |
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| i found a guide setting from hks which said they had found 2 degrees advance on inlet and 8 degrees retard on exhaust, might need some fine tuning but should get you started.
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rmarr1980
Joined: 27 Nov 2006 Posts: 263 Location: Lincoln Feedback Score: 3
1991 Toyota MR2 Mk2 Turbo Rev1
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Posted: Sat Dec 16, 2006 5:51 pm Post subject: |
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Nice one mate saves some time on constant adjustment then run the car then adjust then run then (You know how it is).
Thanks
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greeny
Joined: 20 Feb 2005 Posts: 2533
Feedback Score: 6
1989 Toyota MR2 Mk2 Turbo Rev1
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Posted: Sat Dec 16, 2006 6:40 pm Post subject: |
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what cams are you using?
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RyanRs
Joined: 25 Sep 2005 Posts: 3642 Location: Medway,Kent Feedback Score: 18
1994 Toyota MR2 Mk2 Turbo Rev3
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Posted: Sat Dec 16, 2006 9:12 pm Post subject: |
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| make sure you turn it over by hand before you start the car each time! knock a valve and youll know about it!
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rmarr1980
Joined: 27 Nov 2006 Posts: 263 Location: Lincoln Feedback Score: 3
1991 Toyota MR2 Mk2 Turbo Rev1
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Posted: Sun Dec 17, 2006 8:37 pm Post subject: |
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| greeny wrote: | what cams are you using? ![Confused [Confused]](images/smiles/icon_confused.gif) |
Just using standard cams at the mo but may upgarde later to some hks lumpys later!!
Cheers
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greeny
Joined: 20 Feb 2005 Posts: 2533
Feedback Score: 6
1989 Toyota MR2 Mk2 Turbo Rev1
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Posted: Mon Dec 18, 2006 11:32 am Post subject: |
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Then I wouldn't bother mate till your ready to put some cams in IMO.
Its alot of work for minimal gains IIRC, unless youve already got them on.
Michael.
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Century Motorsport IMOC Affiliated Company
Joined: 12 Oct 2005 Posts: 2861 Location: Kidderminster (West midlands) Feedback Score: 18
1994 Toyota MR2 Mk2 Turbo Rev3
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Posted: Mon Dec 18, 2006 1:02 pm Post subject: |
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| greeny wrote: | Then I wouldn't bother mate till your ready to put some cams in IMO.
Its alot of work for minimal gains IIRC, unless youve already got them on.
Michael. |
Yeah i agree. When you do get a set of HKS cams they will give you a recommended cam timing figure for each cam. I have found, as so have a few others i've spoke to that a couple more degrees (Between 2 - 4) advance from the reccomended ex cam setting picks up the spool and gives it more top end - but beware the idle is more lumpy with the ex cam advanced.
_________________ World's quickest MR2 specialist - 9.722 @ 148 MPH ----- 07947883103 ---- www.centurymotorsport.com
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rmarr1980
Joined: 27 Nov 2006 Posts: 263 Location: Lincoln Feedback Score: 3
1991 Toyota MR2 Mk2 Turbo Rev1
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Posted: Mon Dec 18, 2006 7:31 pm Post subject: |
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How much do you guys reckon I could get a set of cams for? Doesn't have to be hks but as long as they are a reputable make and will be worth it?
I dont fancy having to mess about too often with the timing so may aswell do the job lot and now is the best time as I have the engine in bits to do a bit of a rebuild!
Cheers
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greeny
Joined: 20 Feb 2005 Posts: 2533
Feedback Score: 6
1989 Toyota MR2 Mk2 Turbo Rev1
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Posted: Mon Dec 18, 2006 11:42 pm Post subject: |
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www.nengun.com is quite good on prices.
obviously you'll have to re-shim for the new cams.
have a search there should be loads of info on here about the hks cams and also on www.mr2oc.com
Michael.
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rmarr1980
Joined: 27 Nov 2006 Posts: 263 Location: Lincoln Feedback Score: 3
1991 Toyota MR2 Mk2 Turbo Rev1
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Posted: Sun Dec 24, 2006 2:03 am Post subject: |
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Hey just been researching the hks cams and am really stuck they offer 256, 264 and 272 degree cam durations how do i know whats gonna be the best to go for?
cheers
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Century Motorsport IMOC Affiliated Company
Joined: 12 Oct 2005 Posts: 2861 Location: Kidderminster (West midlands) Feedback Score: 18
1994 Toyota MR2 Mk2 Turbo Rev3
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Posted: Sun Dec 24, 2006 10:33 am Post subject: |
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what turbo are you using or planning on using??
That wil give you a good guideline on what cams your after.
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rmarr1980
Joined: 27 Nov 2006 Posts: 263 Location: Lincoln Feedback Score: 3
1991 Toyota MR2 Mk2 Turbo Rev1
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Posted: Sun Dec 24, 2006 12:22 pm Post subject: |
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Just got a standard ct26 in but had been advised to go for a gt2860rs unit so may go with that if I'm gonna get a better response from the right cams (I want the car to have a good low to mid range power so the turbo needs to spool up quick).
thanks
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TBDevelopments Guest
Feedback Score: 0
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Posted: Sun Dec 24, 2006 3:10 pm Post subject: |
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i don't know the guys overseas found some good power increases by playing with the standard cam timing, i believe the retard on the exhaust seriously helps, sound similar to the hks settings you've got.
If you've got them might as well fit them, not hard to install and set up. be good to see the actual gains before fitting some larger units.
The GT2860rs is also best suited to the standard VE's of the standard head and cam's so playing with standard cam timing would make the most of that turbo and head set up. You don't need huge cams etc for this turbo as they usually do more harm than good on small fast responce turbo's
Tim
xxxx
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Harry
Joined: 30 Mar 2005 Posts: 14439
Feedback Score: 53
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Posted: Sun Dec 24, 2006 11:15 pm Post subject: A1 |
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| xxxx wrote: | i don't know the guys overseas found some good power increases by playing with the standard cam timing, i believe the retard on the exhaust seriously helps, sound similar to the hks settings you've got.
If you've got them might as well fit them, not hard to install and set up. be good to see the actual gains before fitting some larger units.
The GT2860rs is also best suited to the standard VE's of the standard head and cam's so playing with standard cam timing would make the most of that turbo and head set up. You don't need huge cams etc for this turbo as they usually do more harm than good on small fast responce turbo's
Tim
xxxx |
That is really good information Tim
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