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| T O P I C R E V I E W | | SAAB96L | Posted - 29 Aug 2021 : 17:28:11
Hello,
I will be grateful to know if anyone has used these silicone rocker cover gaskets from Real Gaskets Tennessee, please.
https://realgaskets.com/product-category/automotive/saab/
Or if someone has used another supplier.
Many thanks.
Richard. | | 11 L A T E S T R E P L I E S (Newest First) | | melle | Posted - 06 Sep 2021 : 12:10:23
quote:
Originally posted by Derek
I think that metered/unmetered is a red herring here as the connections are on the outboard side of the carb. If the connections were to the block below the carb or to the inlet manifold it would be relevant.
I believe the air intake volume is dictated by manifold vacuum no matter where the connection is, as long as it's shared with the manifold intake (i.e., in the air filter). Also see below.
quote:
Originally posted by Derek
Yes, the closed circuit will be lost with a small cone K&N on the filler spigot so not sure if it's sucking or blowing when it's like that.
It could do either depending on engine pressure difference I suppose. At idle for instance, when manifold vacuum is high and the pcv valve thus closed, I can imagine it will blow. If the rocker cover or filler cap is connected to the filter housing when it blows, the gasses will be sucked back into the engine through the intake. The gasses will be relatively clean at high vacuum as in this scenario there will be little blow-by on a healthy engine. However, the filler cap also has an oil screen, and the earlier type where the rocker cover directly connects to the air filter has a baffle, to prevent air filter/ carb fouling. It's a simple yet ingenious system, but not easy to get your head around.
quote:
Originally posted by Derek
A bigger filter housing needed for the mod you picture Melle
I've done this mod on small (pancake) filters for Weber DCD and DGVs too but don't have a pic handy.
quote:
Originally posted by Derek
The standard filter housing fits a Weber too. Is this a Weber or late Solex? Standard one is quieter too unless you like the roar of a small filter. I'd prefer quiet on the long runs that this car makes.
Mine is a quite heavily modified Solex 32TDID filter housing that I use with a standard paper filter (MANN C 2852) on a Weber 28/36DCD. Andy's one is a decently sized proper K&N, but many use way too loud and way too small filters (especially the cheap no-name mini/ Mini pancake-with-pan-scourers type that doesn't even have proper filtering capacities).
www.saabv4.com | | Derek | Posted - 06 Sep 2021 : 10:56:20
I think that metered/unmetered is a red herring here as the connections are on the outboard side of the carb. If the connections were to the block below the carb or to the inlet manifold it would be relevant. Yes, the closed circuit will be lost with a small cone K&N on the filler spigot so not sure if it's sucking or blowing when it's like that. A bigger filter housing needed for the mod you picture Melle and that has been described here previously. There is room for a thin but larger American V8 style filter if you select carefully.
The standard filter housing fits a Weber too. Is this a Weber or late Solex? Standard one is quieter too unless you like the roar of a small filter. I'd prefer quiet on the long runs that this car makes. | | melle | Posted - 05 Sep 2021 : 21:40:42
Andy, you no longer have a closed loop system with your set-up; a separate filter on the filler cap means you effectively have a vacuum leak as the engine will be drawing in unmetered air instead of a metered volume as when it would be pulled in through the engine air filter. Might affect your fuelling issue/ carb tuning too.
I've had good luck modifying K&N filter housings by drilling a hole in the base, sticking a copper pipe stiffener through it from the inside and soldering a short piece (mm) of pipe onto it on the outside to lock it in place. This gives you a nice ferrule for the hose, you can add a compression olive so the hose won't slide of on its own accord. Different type of air filter, but the principle is the same:
www.saabv4.com | | andydeans3 | Posted - 05 Sep 2021 : 21:28:31
quote:
Originally posted by andydeans3
quote:
Originally posted by melle
I'm personally not mad keen on the look of them, but they're indeed a very good upgrade. Hope you got that breather hose on the filler cap hooked up to the air filter now, Andy! ;)
www.saabv4.com
Aye, it's an old photo. It's not connected to the air filters, (Difficult with the K&Ns), but it now has its own filter on the end of the cap.
I like these alloy rockers covers, much better than the tin ones!
1978 LHD SAAB 96
1978 MGB Roadster
2008 LHD "Classic" Renault Twingo
1991 Nissan Figaro
1978 LHD SAAB 96
1978 MGB Roadster
2008 LHD "Classic" Renault Twingo
1991 Nissan Figaro | | andydeans3 | Posted - 05 Sep 2021 : 19:29:34
.......... | | stevebod | Posted - 02 Sep 2021 : 12:06:21
+1 for "Real Gaskets".
Have been using a pair of them for year and have never looked back. | | melle | Posted - 01 Sep 2021 : 20:11:11
I'm personally not mad keen on the look of them, but they're indeed a very good upgrade. Hope you got that breather hose on the filler cap hooked up to the air filter now, Andy! ;)
www.saabv4.com | | andydeans3 | Posted - 01 Sep 2021 : 19:36:59
I've got alloy rocker covers, which. due to them being very rigid, helps sealing a lot.
Andy
1978 LHD SAAB 96
1978 MGB Roadster
2008 LHD "Classic" Renault Twingo
1991 Nissan Figaro | | SAAB96L | Posted - 30 Aug 2021 : 17:56:15
Thank you both, very useful and I can see the case for both options.
The only hurdle is the postage from the USA; needless to say not cheap !!
Richard. | | melle | Posted - 30 Aug 2021 : 10:14:47
I've also been using them for years and I've also found them to be an excellent product (do not overtighten the bolts though or you'll ruin them). For the price though, I prefer good quality cork gaskets (e.g., Payen, Victor Reinz or Goetze). A good seal depends more on the tin being flat than on the gasket material in my experience, so definitely worth taking the time to straighten the rocker covers before fitting them, especially around the bolt holes.
www.saabv4.com | | andydeans3 | Posted - 29 Aug 2021 : 20:58:35
I have been using these silicone gaskets from The Real gasket Company, Tennessee, for many years. Excellent product.
Easy to clean between uses, (hot soapy water).
I've re-used them many times.
Much, much better than the standard cork gaskets.
1978 LHD SAAB 96
1978 MGB Roadster
2008 LHD "Classic" Renault Twingo
1991 Nissan Figaro |
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