Mike D'Silva Posted 6September, 2020 Report Share Posted 6September, 2020 Thought I'd post a few pics of an engine I am currently refreshing... not sure if many are interested in this stuff... ?? Pics will basically form a timeline.. Had a few delays waiting for parts but we are on the final stretch now. Engine ran well, but was leaking a fair amount of oil. We are replacing the stock 8.5:1 pistons for 9.8:1 and also upgrading camshafts with a custom grind sourced through William Knight in the USA, who has designed these and has them manufactured by Webcamshafts.com. It will be interesting to see how this motor performs, as the cam is "more" than a 964 or 20/21 that is commonly used, but the claim is that it will outperform them, even using the CIS. Time will tell. Check out the before pics...! yummy!! See how far the plunger in the chain tensioner is extended? Stepo, MFX, Dalai and 12 others 15 Quote Link to comment Share on other sites More sharing options...
James P Posted 6September, 2020 Report Share Posted 6September, 2020 Very interested keep the photos & info coming... Raven and Mike D'Silva 2 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 6September, 2020 Author Report Share Posted 6September, 2020 1 minute ago, James P said: Very interested keep the photos & info coming... thanks for the interest! Some interesting efforts to curb the rocker shafts from leaking... see the "home made rsr seals"????!! Someone made this spacer for the chain tensioner upgrade.. I guess it worked... just a tad grimy in there... tk111, firstone, Scott930 and 5 others 8 Quote Link to comment Share on other sites More sharing options...
Zelrik911 Posted 6September, 2020 Report Share Posted 6September, 2020 How many broken Headstuds? Quote Link to comment Share on other sites More sharing options...
drmurugti Posted 7September, 2020 Report Share Posted 7September, 2020 did someone use silicone to plug leaks? Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 7September, 2020 Author Report Share Posted 7September, 2020 2 hours ago, Zelrik911 said: How many broken Headstuds? None. It looked like a couple had been replaced though.. I'm guessing that a previous owner might have had some bandaid work done to replace a couple studs (only the broken ones). The top end had been off before, but I don't think the case had been apart before. They marked the cylinder positions incorrectly too.. 19 minutes ago, drmurugti said: did someone use silicone to plug leaks? The silicone was used during assembly last time around. Is it wrong?? Well, it is not something I would do. Quote Link to comment Share on other sites More sharing options...
Stepo Posted 7September, 2020 Report Share Posted 7September, 2020 14 hours ago, Mike D'Silva said: Thought I'd post a few pics of an engine I am currently refreshing... not sure if many are interested in this stuff... ?? I think you will find most PFA members are interested in what you are posting. I've watched several of your original time lapse threads and enjoyed seeing how things come apart and go back together. If I needed an engine rebuild and you were down our way I'd be dropping in for a coffee and a chat, keep up the good work and options for our local Porsche lovers! Mike D'Silva, Dalai, drmurugti and 1 other 4 Quote Link to comment Share on other sites More sharing options...
Cheshire Cat Posted 7September, 2020 Report Share Posted 7September, 2020 Mike! Post`em all! Not sure about the rest, but I`m finding it very useful and interesting! firstone and Raven 2 Quote Link to comment Share on other sites More sharing options...
MFX Posted 7September, 2020 Report Share Posted 7September, 2020 Very interesting seeing some of the 'fixes' people have done on these engines over the years. Quote Link to comment Share on other sites More sharing options...
Coastr Posted 8September, 2020 Report Share Posted 8September, 2020 What’s the engine type? Big port or small port? Interested to know how lively it is after higher compression and cams. Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 13September, 2020 Author Report Share Posted 13September, 2020 On 09/09/2020 at 02:11, Coastr said: What’s the engine type? Big port or small port? Interested to know how lively it is after higher compression and cams. Cannot remember the engine type, but it is a big port From this TO this New Headstuds installed Upgrade to 9.8:1 CIS pistons... Cylinders recoated to suit. Time to set cam timing! Bah.. I didn't take any photos of the cam timing process.. it's pretty boring and there are tonnes of cool videos on youtube showing how. but, it is done. Here is something interesting to examine... notice how far the chain tensioner is extended in this pre-disassembly photo... And then compare to how far it is extended in the bottom, new chain photo. Peter M, luzzo, tomo and 10 others 12 1 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 14September, 2020 Author Report Share Posted 14September, 2020 So today I spent a long time double checking cam timing, valve clearances, then fitting valve covers etc.. And those bloody SSi's.. I hate them! What a pain to have to refit them (I now remember the joys of taking them off!!) At least now they are clean. If you scroll up, you can see the state they were in with so much crud baking on them. Hoping these will last a little longer this time around OBRUT, Barks, tomo and 11 others 14 Quote Link to comment Share on other sites More sharing options...
P-Kay Posted 14September, 2020 Report Share Posted 14September, 2020 Nice work as always @Mike D'Silva Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 17September, 2020 Author Report Share Posted 17September, 2020 Starting to finish this.. I don't really want to add all the CIS parts back to it.. but it won't run without them! What do you think of the black and gold ? OBRUT, SteveF, firstone and 6 others 9 Quote Link to comment Share on other sites More sharing options...
TDW911 Posted 17September, 2020 Report Share Posted 17September, 2020 Looks awesome Mike, how did you get the case so clean. Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 17September, 2020 Author Report Share Posted 17September, 2020 1 minute ago, TDW911 said: Looks awesome Mike, how did you get the case so clean. cheers, the case was ultrasonically cleaned.. and then copious amounts of elbow grease and brake cleaner.. Quote Link to comment Share on other sites More sharing options...
TDW911 Posted 17September, 2020 Report Share Posted 17September, 2020 Stunning work as usual. Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
P-Kay Posted 17September, 2020 Report Share Posted 17September, 2020 Keep up the great work Mike 👍 Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 19September, 2020 Author Report Share Posted 19September, 2020 tk111, firstone, MFX and 2 others 4 1 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 20September, 2020 Author Report Share Posted 20September, 2020 So while this one is done, I feel this one has turned out really well. I have not driven one of these with a 964 cam or a 20/21 (both common go to options for a stockish motor) but with this custom camshaft, it really does feel good. Bottom end is possibly just a little softer, but from 3500 it really wants to keep going. Obviously, we have not done many kms yet so don't want to rev it too hard but initial impressions are VERY good. Would love to get it on a dyno when it has done some kms. This motor runs very very smooth. It is fitted with a set of SSi heat exchangers and a Dansk sport muffler.. exhaust note is very sweet.. not obnoxious. Definately has a deeper growl to it which I believe is due to the extra duration of the camshafts. Blipping the throttle has the tacho needle swinging VERY quickly firstone, WOKA, Peter M and 1 other 4 Quote Link to comment Share on other sites More sharing options...
OBRUT Posted 21September, 2020 Report Share Posted 21September, 2020 16 hours ago, Mike D'Silva said: So while this one is done, I feel this one has turned out really well. I have not driven one of these with a 964 cam or a 20/21 (both common go to options for a stockish motor) but with this custom camshaft, it really does feel good. Bottom end is possibly just a little softer, but from 3500 it really wants to keep going. Obviously, we have not done many kms yet so don't want to rev it too hard but initial impressions are VERY good. Would love to get it on a dyno when it has done some kms. This motor runs very very smooth. It is fitted with a set of SSi heat exchangers and a Dansk sport muffler.. exhaust note is very sweet.. not obnoxious. Definately has a deeper growl to it which I believe is due to the extra duration of the camshafts. Blipping the throttle has the tacho needle swinging VERY quickly Sounds like a great combo. Congrats. Quote Link to comment Share on other sites More sharing options...
MFX Posted 21September, 2020 Report Share Posted 21September, 2020 Another great build mate. With how pretty it all is, that filter cover really looks beat up. Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Coastr Posted 21September, 2020 Report Share Posted 21September, 2020 Nothing wrong with a nicely cleaned up CIS. It looked the business back in the day when everything else was running a pie dish air cleaner and a stinky old carb underneath. When all the plating is up to scratch and The hoses are neat can look cool. Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Raven Posted 21September, 2020 Report Share Posted 21September, 2020 That looks stunning well done ............... Mike D'Silva 1 Quote Link to comment Share on other sites More sharing options...
Mike D'Silva Posted 21September, 2020 Author Report Share Posted 21September, 2020 1 hour ago, MFX said: Another great build mate. With how pretty it all is, that filter cover really looks beat up. Agree and the owner has just bought a new one MFX 1 Quote Link to comment Share on other sites More sharing options...
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