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Total 15 documents matching your query.

1. 1980 Spitfire Head (score: 1): Author: elliottr@rmi.net; Date: Mon, 8 May 2006 16:41:56 -0500 (GMT-05:00); I am considering having the head on my Spitfire milled down to give me a little more compression. It is a stock 80 head so it is currently about 7.5 to 1. I am thinking of taking it to about 9 to 1.; /html/spitfires/2006-05/msg00023.html (7,068 bytes)
2. Re: 1980 Spitfire Head (score: 1): Author: "Chris King" <cbking@alum.rpi.edu>; Date: Mon, 8 May 2006 17:41:01 -0700; For 9:1 compression on a 1500 motor, you want to replce the US spec dished pistons with the UK spec flat-topped ones. You may still need to mill the head a bit, but this will get you close to the sto; /html/spitfires/2006-05/msg00024.html (7,620 bytes)
3. Re: 1980 Spitfire Head (score: 1): Author: TR250Driver@aol.com; Date: Mon, 8 May 2006 21:40:04 EDT; For 9:1 compression on a 1500 motor, you want to replce the US spec dished pistons with the UK spec flat-topped ones. You may still need to mill the head a bit, but this will get you close to the sto; /html/spitfires/2006-05/msg00025.html (7,143 bytes)
4. RE: 1980 Spitfire Head (score: 1): Author: "Gene Eighmy" <w4eae@netzero.net>; Date: Tue, 9 May 2006 00:13:31 -0500; Roger, I used +0.020 flat pitons and milled the head on my 79 Spitfire to get 9.5:1 CR. Originally, I had asked the machine shop to mill the head for 9.5:1 CR but when I got it back, all they had do; /html/spitfires/2006-05/msg00027.html (8,339 bytes)
5. RE: 1980 Spitfire Head (score: 1): Author: Doug Braun <doug@dougbraun.com>; Date: Tue, 9 May 2006 06:11:05 -0700 (PDT); For a stock US '72 1300 engine, I ended up milling from the head. The shop thought I was crazy. They also charged me extra, since the milling job took a lot longer than the usual flattening/smoothing; /html/spitfires/2006-05/msg00030.html (6,753 bytes)
6. Re: 1980 Spitfire Head (score: 1): Author: Cwn74@aol.com; Date: Thu, 11 May 2006 20:29:37 EDT; I am considering having the head on my Spitfire milled down to give me a little more compression. It is a stock 80 head so it is currently about 7.5 to 1. I am thinking of taking it to about 9 to 1.; /html/spitfires/2006-05/msg00038.html (7,994 bytes)
7. Re: 1980 Spitfire Head (score: 1): Author: "Ken C" <sdspitfire@hotmail.com>; Date: Fri, 12 May 2006 00:58:41 +0000; A machine shop removed about 0.25" on mine, yielded about 9.6:1 with flat top pistons.. So, probably around 0.2". I did not replace the pushrods, but it's something easily checked when assembling the; /html/spitfires/2006-05/msg00039.html (7,423 bytes)
8. Re: 1980 Spitfire Head (score: 1): Author: "Joe Curry" <spitlist@cox.net>; Date: Fri, 12 May 2006 06:28:20 -0700; Arte you sure about that number? .25 is a quarter of an inch. That seems to be a bit extreme for milling a head. If it is a 1500 head on a 1500 engine, it would give you about 250 pounds of compress; /html/spitfires/2006-05/msg00040.html (8,359 bytes)
9. Re: 1980 Spitfire Head (score: 1): Author: "Ken C" <sdspitfire@hotmail.com>; Date: Fri, 12 May 2006 14:53:35 +0000; I'm not sure about anything. :-) I looked thru the receipts from the machine shop and couldn't find anything. I do remember I was a bit shocked when the machine shop told me how much was removed. I d; /html/spitfires/2006-05/msg00041.html (8,453 bytes)
10. Re: 1980 Spitfire Head (score: 1): Author: "Joe Curry" <spitlist@cox.net>; Date: Fri, 12 May 2006 08:17:11 -0700; If you pull off the valve cover, you can measure the height of the head. If it is about 3-1/16" is is right around where I would expect it to be. If it is less than 3" I would be concerned. Joe engin; /html/spitfires/2006-05/msg00042.html (9,127 bytes)
11. Re: 1980 Spitfire Head (score: 1): Author: "Mark J. Bradakis" <mark@bradakis.com>; Date: Fri, 12 May 2006 09:24:54 -0600; The little Kastner competition prep book for the 1500 Spitfire has a chapter on heads. One of the first sentences in that chapter says something like 'mill the head 0.225 in." mjb. == This list suppo; /html/spitfires/2006-05/msg00043.html (7,248 bytes)
12. RE: 1980 Spitfire Head (score: 1): Author: "Gene Eighmy" <w4eae@netzero.net>; Date: Fri, 12 May 2006 12:29:58 -0500; I agree with Joe... I milled only about 0.060 and it pings on 87 octane so bad I bought some Lucas Octane Boost. The most milling I have heard about is 0.200 on RazorBob's '79. Kastner is probably ru; /html/spitfires/2006-05/msg00044.html (7,939 bytes)
13. Re: 1980 Spitfire Head (score: 1): Author: "Ken C" <sdspitfire@hotmail.com>; Date: Sat, 13 May 2006 13:49:19 +0000; Won't be able to make the measurement untill next week. I am certainly curioius. Still think I remember the machine shop saying something like 1/4 inch. But, hell, I can barely remember breakfast !!; /html/spitfires/2006-05/msg00047.html (8,106 bytes)
14. 1980 Spitfire Head (score: 1): Author: Dale M Osterndorf <osternd@juno.com>; Date: Sat, 13 May 2006 20:30:42 -0400; If it's not too late to jump in here, to achieve a 9.75:1 ratio, I had to mill the head 0.115" on my '78 Spit. I am running flat top pistons, decked block, ported and modified head, CC'd (37.2cc), 27; /html/spitfires/2006-05/msg00048.html (8,308 bytes)
15. Re: 1980 Spitfire Head (score: 1): Author: Roger Elliott <elliottr@rmi.net>; Date: Sun, 14 May 2006 18:30:49 -0500; I want to thank everyone for information on milling down a Spitfire head. I know that Ted is right - to be sure I need to cc the engine. Anyway, right now I have decided to hold off. I have enough to; /html/spitfires/2006-05/msg00052.html (8,343 bytes)

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