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Ok guys, I have done some searching around the engine and found the following part Nos, Can anybody identify them and tell me if they are a match for a 186 fit or have I got the wrong parts fitted..
HEAD = 7438296 - (holden D 1 8 4 H)
BLOCK = 186P399005
MANIFOLD = 7434446-P (114)
WW CARBY = 23 3078 0 22 (with 55" jets)
Still fault finding, and this might rule things out. cheers guys Jimbob
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I suspect the carb is HJ'ish 253. If someone can confirm the model and post it here: http://fastlane.com.au/f...topic.asp?TOPIC_ID=4382
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I suspect the carb is HJish 253. If someone can confirm the model and post it here: http://fastlane.com.au/f.../topic.asp?TOPIC_ID=4382
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Hi jimbob.
The head is off a 161. The inlet manifold is HK/HT/HG 186S. The block is stock 186 late HT or early HG & the carby is 253 Auto HQ Aug '73 to Sept '74.
Dr Terry. |
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Hi jimbob.
The head is off a 161. The inlet manifold is HK/HT/HG 186S. The block is stock 186 late HT or early HG & the carby is 253 Auto HQ Aug 73 to Sept 74.
Dr Terry. |
If at first you don't succeed, just call it Version 1.0 |
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Cheers Tom, I found the carby info. The 23-3078 WW is off a 253 V8 HQ from 73 to 74. jimbobhtute
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1970 Green HT UTE... |
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Hi again
The 23-3078 WW carby is off a 253 V8 man Aug '73 to Sept '74 the 23-3077 is the auto, my mistake, sorry.
Dr Terry |
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Hi again
The 23-3078 WW carby is off a 253 V8 man Aug 73 to Sept 74 the 23-3077 is the auto, my mistake, sorry.
Dr Terry |
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Thanks Dr Terry, Can you put a 161 head onto a standard 186 donk??? And if so what effect does this have on performance or other required mods to get smoother running?? Hmmm interesting.. jimbobhtute |
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i think you can it will just give you much higher compression.
zac
Just put a V8 in it!!!
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A 161 Head on a 186 will give you about 11:1 compression which SHOULD run OK on 98 Octane PULP but will struggle with 96 and don't even THINK about 91...Some of it is explained here: http://www.oldholden.com...Maths#Compression_Ratio
A
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A 161 Head on a 186 will give you about 11:1 compression which SHOULD run OK on 98 Octane PULP but will struggle with 96 and dont even THINK about 91...Some of it is explained here: http://www.oldholden.com...Maths#Compression_Ratio
Ar
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my 186 stromberg has 58 jet and runs sweet... Edited by user Thursday, 8 December 2005 8:27:03 AM(UTC)
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Hi Guys.
Qute is pretty right about the suitability of todays fuels in an engine with such a relatively high compression ratio. This is why tuning is so important.
With the jetting of carbies the size of the main jet is only half the story, the size |
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Well, the things you find out about your engine. Thanks guys. Now with the 11:1 compression ratio, do I have to change the valves and valve springs from the standard 186 type to a more suitable type to handle the load. When I last pulled the head off in |
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The big thing with power valve is the manifold vacuum at idle and under acceleration. I used to get shocking economy with lumpy cam, and when put vacuum gauge in, found that I was well into the powewr valves opening range at idle. So basically as soon Edited by user Thursday, 8 December 2005 11:42:45 PM(UTC)
| Reason: Not specified |
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Keep the shiny side up, and the greasy side down. |
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Thanks jabba
What procedure do I use for checking Manifold pressure?? I have Timing set to around 8'-10' BTDC at the moment with no knocking. Replaced the balancer month ago because it had failed and shifted, so I assume it is correct now. Any |
1970 Green HT UTE... |
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Thanks jabba
What procedure do I use for checking Manifold pressure?? I have Timing set to around 8-10 BTDC at the moment with no knocking. Replaced the balancer month ago because it had failed and shifted, so I assume it is correct now. Anybo |
1970 Green HT UTE... |
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An ordinary repco (or autometer or brand of choice) vaccum gauge, tapped into manifold (or base of carby vacuum port). Dont use the distributor advance vacuum port for a reading, because it works kind of backwards.
Most vacuum gauges have both inches |
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Keep the shiny side up, and the greasy side down. |
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Rank: Member
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An ordinary repco (or autometer or brand of choice) vaccum gauge, tapped into manifold (or base of carby vacuum port). Don't use the distributor advance vacuum port for a reading, because it works kind of backwards.
Most vacuum gauges have both inches |
__________________________________________
Keep the shiny side up, and the greasy side down. |
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