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Re: Cosworth TJ V10 Piston
Posted: 23 Mar 2019, 06:54
by Maritimer
humble sabot wrote: ↑23 Mar 2019, 06:18
24? That's fully double of any installation I've actually seen. I'd love to know what that actually looks like.
Take your 6 original jets and put four outlet nozzles on each of them, boom
Re: Cosworth TJ V10 Piston
Posted: 23 Mar 2019, 12:02
by saviour stivala
Maritimer wrote: ↑23 Mar 2019, 06:54
humble sabot wrote: ↑23 Mar 2019, 06:18
24? That's fully double of any installation I've actually seen. I'd love to know what that actually looks like.
Take your 6 original jets and put four outlet nozzles on each of them, boom
Spot-on. “Honda V8 Development of piston oil cooling jets”;- In the initial stages 4 and 6 hole were used in the oil jets. The flow rate injected was higher than 10-l/min. as development proceeded the oil flow rate was steadily increased by means of increasing the diameter of the jets holes from 2mm, but with the use of MMC pistons this modification was not needed. When MMC pistons were banned and returning to the 2000 aluminum pistons crack were getting into a big problem with the increased engine speeds. Increasing the volume of oil flow through the jets simply increased friction. An interim measure was retarding the ignition by 6.5 degrees which resulted in a decreased output. What was needed was an even spread of cooling oil over a wide area which was achieved by the 6 hole per jet per piston being increased to 12 holes and finally to 24 holes.
Re: Cosworth TJ V10 Piston
Posted: 23 Mar 2019, 17:51
by e36jon
Re: Cosworth TJ V10 Piston
Posted: 23 Mar 2019, 20:13
by hardingfv32
What are the words inlet and exhaust describing in the upper part of the illustration?
Brian
Re: Cosworth TJ V10 Piston
Posted: 23 Mar 2019, 21:17
by e36jon
They are referring to the inlet valve side of the piston and the exhaust valve side of the piston.
And a belated 'sorry' for the semi-hijack of a truly excellent thread.
Jon
Re: Cosworth TJ V10 Piston
Posted: 23 Mar 2019, 23:05
by saviour stivala
e36jon wrote: ↑23 Mar 2019, 21:17
They are referring to the inlet valve side of the piston and the exhaust valve side of the piston.
And a belated 'sorry' for the semi-hijack of a truly excellent thread.
Jon
'Semi-hijack???' Solid and official technical information is always welcome. just one point if you don't mind. you omitted mentioning that that those piston/oil cooling jets illustrations pertains to Honda F1 V8 engine.
Re: Cosworth TJ V10 Piston
Posted: 12 Apr 2019, 18:05
by voice_of_reason
Interesting post.
Re: Cosworth TJ V10 Piston
Posted: 14 Apr 2019, 10:53
by ACRO
maybe i missed it in the thread , but what is the bore of the tj piston ?
best regards
Re: Cosworth TJ V10 Piston
Posted: 16 Apr 2019, 13:58
by voice_of_reason
ACRO wrote: ↑14 Apr 2019, 10:53
maybe i missed it in the thread , but what is the bore of the tj piston ?
best regards
Early specs of the engine had 95mm bore.
Some later specs were built with 96mm bore bottom ends.
Re: Cosworth TJ V10 Piston
Posted: 28 Apr 2019, 11:03
by ACRO
thanks much for the info ! do you have the bore of the cosworth cr3 v10 ( ck family ) ?
Re: Cosworth TJ V10 Piston
Posted: 31 May 2019, 19:58
by saviour stivala
ACRO wrote: ↑28 Apr 2019, 11:03
thanks much for the info ! do you have the bore of the cosworth cr3 v10 ( ck family ) ?
Cosworth CR-3 (external designation) CK family (internal designation) = CK 2001 used by Jaguar R2.
Cosworth CR-3 (external designation) CK family (internal designation) = CK 2002 used by Jaguar R3. "from Canada CR-4 (external designation) LK 2002 family (internal designation).
Cosworth 2005 TJ005 (external designation) TJ 2005 (internal designation) used by Red Bull RB1, this was series 10 engine, had a 95mm bore and a stroke of 42mm.
