Ring gap grinder tool
Any one got a ring grinder tool i need one as i need to gap my new rings on my ej257 engine build
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Make your own
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Hi don thanks managed to do my ring gaps!!
Mahle 2618 piston pack supplied,done the ring gaps per the tech sheet i have been told by two very good sources they seem to large for application. On the tech sheet mahle recommend over 15 psi of post math Is 3.927 x 70 = 27" on top and middle ring. Emailed them to confirm this and there adament this is correct, anyone had any experience of this,car is a 2011 sti ej257 street car no track days etc looking for 400 + |
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You need to work on 0.1016mm per 25mm dia of bore for your use of the engine, if you gap as Mahle suggest you will have a smoky old high blowby engine.
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Originally Posted by MOTORS S GT
(Post 12057057)
You need to work on 0.1016mm per 25mm dia of bore for your use of the engine, if you gap as Mahle suggest you will have a smoky old high blowby engine.
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Top ring gap 0.406mm or 0.016", 2nd ring 0.406mm minus 0 plus 0.0508mm or 0.002", oil pack are usually ok, but at least 0.508mm as a minimum, for your build this is more than enough.
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Originally Posted by MOTORS S GT
(Post 12057085)
Top ring gap 0.406mm or 0.016", 2nd ring 0.406mm minus 0 plus 0.0508mm or 0.002", oil pack are usually ok, but at least 0.508mm as a minimum, for your build this is more than enough.
so with 2618 pistons on a 99.75mm bore.. top 16" middle ring 18" oil rings as per tech sheet min 15" i think they measured 20" plus. and i shouldn't get any problems with gap closing and excessive blowbye, can i ask if you may know why mahle have excessive 27" gap on both rings as i think its misleading as ive now got to buy another set of rings from america £150 plus and its a misleading expensive mistake. |
The 2nd ring I would set to 0.016" as long as its no smaller than the top ring, as for Mahle's settings, they have to cover all possibilities, & will side with caution, so go bigger, they think everybody uses 2 bar of boost & nitrous injection, even there settings for piston to bore clearance is baggy, if you went by there settings you would have a very noisy engine.
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Originally Posted by MOTORS S GT
(Post 12057107)
The 2nd ring I would set to 0.016" as long as its no smaller than the top ring, as for Mahle's settings, they have to cover all possibilities, & will side with caution, so go bigger, they think everybody uses 2 bar of boost & nitrous injection, even there settings for piston to bore clearance is baggy, if you went by there settings you would have a very noisy engine.
1) top 10" middle 16" 2) top 14" middle 16" 3) top 16" middle 18" 4) mahle turbo over 15 psi 27" 🙈 https://cimg6.ibsrv.net/gimg/www.sco...be014e2ad.jpeg My gut feeling is to stick to option two, but I've had so many numbers put out there i need 2 numbers that puts me in the sweet spot please |
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