Author Topic: 186 Head wanted urgently! (Read 12137 times)

Warren · « **Reply #30 on:** August 28, 2009, 01:38:22 PM »

Quote from: Rothu on August 28, 2009, 01:30:48 PM

Why do extractors make a difference? I can get some good ones for $45.

Extractors usually have a less restrictive flow, thus allowing the exhaust gasses to be expelled quicker.

If the exhaust gasses escape quicker then there is less back pressure left over when the cylinder is being filled, so more air fuel mixture can get in - making a bigger combustion.

Try breathing in and out through a straw, then through a cling wrap tube - notice the difference ?

Warren

able · « **Reply #31 on:** August 28, 2009, 06:23:03 PM »

i had it explained to me that because of their design/shape they use the last cylinders exhaust to create vacuum and they virtually suck the next cylinders exhaust out when the valve opens.. hence the name extractor.

does that ring true?

eddy · « **Reply #32 on:** August 28, 2009, 06:39:14 PM »

dunno, me simple man, bolt on extractor and van go faster sound nicer too but engine him get hotter

Warren · « **Reply #33 on:** August 28, 2009, 11:14:41 PM »

Quote from: able on August 28, 2009, 06:23:03 PM

i had it explained to me that because of their design/shape they use the last cylinders exhaust to create vacuum and they virtually suck the next cylinders exhaust out when the valve opens.. hence the name extractor.

does that ring true?

Yes Able thats pretty well it, well theres a lot more really but thats the general idea

Warren

Rothu · « **Reply #34 on:** August 29, 2009, 12:07:44 PM »

Ok, any one in melbourne got any spare extractors for a holden 6?

Rogue Trooper · « **Reply #35 on:** August 29, 2009, 01:09:57 PM »

There was a set especially designed for tight installs like the 173, 186, 202 into Bedford vans etc. They hugged the block a lot more and cut quite close to the trans. The only problem with them was that you had to remove them to change the starter motor.

You may find you have trouble with the sweep of a standard set.

ben · « **Reply #36 on:** August 29, 2009, 06:52:56 PM »

ive got a set for ya waiting here. ill drop em off!

ben · « **Reply #37 on:** August 29, 2009, 06:53:36 PM »

sorry i lied. they are for a blue/ black. no good.

ben

restoreid · « **Reply #38 on:** August 29, 2009, 07:12:50 PM »

Hey Ben why wont extractors off a blue or black motor fit My bro inlaw gave me a set off a black one You tellin me they wont fit BUMMER Cheers Reid

able · « **Reply #39 on:** August 29, 2009, 07:27:13 PM »

Quote from: restoreid on August 29, 2009, 07:12:50 PM

Hey Ben why wont extractors off a blue or black motor fit My bro inlaw gave me a set off a black one You tellin me they wont fit BUMMER Cheers Reid

Rothu has a red head...

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