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joethescoot | Posted - 22 Nov 2020 : 17:46:09 Please can you help me. If I fit 91 mm pinto HC pistons and a 1700 crank ,am I right in thinking I use 1500 con rods , and I don’t need to adjust the piston height or the block height. Roughly what cc will I run. In Many thanks Joe
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TTruckie | Posted - 21 Dec 2020 : 21:53:57 Yes you can use pinto pistons with a 1700 crank and standard 1500 conrods. The pinto pistons, like the 1700 pistons, have a shorter side skirt than the 1500 pistons, which is why you can't use 1500 pistons with a 1700 crank as the corned will hit the skirt. Pinto pistons are easy to get and therefore quite cheap and come ia a selection of sizes and tend to be high compression. A lot of the 1700 pistons you can get are the low compression type. Burtons can give advise.
I did not need to skim the pinto pistons when I built my 1740 engine |
melle | Posted - 23 Nov 2020 : 21:36:42 90mm. Download the factory workshop manual from my website if you don't have it, all engine specs are in section 0: http://www.saabv4.com/index.php/saab-factory-manuals/saab-v4-factory-workshop-manual-english/
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joethescoot | Posted - 23 Nov 2020 : 21:01:46 Merle what is standard size |
melle | Posted - 23 Nov 2020 : 18:32:37 There shouldn't be as long as the pistons and cylinder walls are in good condition (assuming you're using std diameter pistons in std diameter bores).
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joethescoot | Posted - 23 Nov 2020 : 18:21:40 If I use 1700 pistons there’s no need for any machining. |
melle | Posted - 23 Nov 2020 : 08:48:31 I've only ever used 2nd hand 1700 pistons. The need for bigger diameter pistons depends on what you want from the engine.
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joethescoot | Posted - 23 Nov 2020 : 07:07:15 Mille. What piston would you use ? And if I’m going to have to have a Rebore would you go bigger. Many thanks Joe |
melle | Posted - 22 Nov 2020 : 22:51:57 Hi Joe, been a while! All con rods are the same length (130.5mm from memory), V6 ones too. A 1.7 crank with 91mm HC pistons will result in 1740cc. I've never used Pinto pistons, but I know Beta had to have his pistons machined because they protruded above the deck.
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