Saturday, February 09, 2008

Roller Rockers

I've been busy this week looking out for parts going cheap! I'm going to have a few jobs to do on the Spitfire in the future and I really want to get all the parts aquired so I can just do it next time I've got some time off. One of these little jobs has been brought about by a steady drip of oil under the car. It can only be coming from the rear oil seal so basically either the engine or the gearbox will have to come out to fit a new one. I'm not in the business of doing anything by halves either so there will be a mass upgrading in that area while the engine is out. I'm going to go for one of those light flywheels (either a Canleys steel or a Firdanza alloy one) and an alloy bellhousing. Of course I'll chuck in the AP clutch and the alloy backplate I've already got, bolt it all back together (I've heard Chevy flywheel bolts are a good upgrade) and I should be good to go!

My other little job is to finish off my cylinder head. I still need to finish the exhaust ports off and get a pro to fit bigger valves for me. Basically the lot need doing. It need new guides, valves and springs. It's sounding more expensive by the second!

Despite saying only recenly that I would be smoothing and polishing some rockers up I had a change of plan. Ebay turned up some Harland Sharp roller rockers that were going suprisingly cheaply. A bargain for just £84! I love Ebay!


Anonymous said...

You do not need to fit an external oil feed line to the top end of this engine, if using roller rockers. You really should not rob oil from the mains to feed the rockers anyway, but with rollers, definately not necessary.

William Columbine said...

Cheers for the advice! I wouldn't let one of those oil feeds anywhere near my engine. I never understood why people would sacrifice a bottom end to save wear on a £30 rocker shaft!

Spitfire Triumphs and Tribulations said...

I Bought a set of the roller rockers new... and to fit direct into a Spitfire the first and last were machined down to fit the pedestools... the machined rockers (1 & 8) are 1.5/8" as opposed to 1.3/4" the part no i have is S11520 with a hand written note on the label "w/ends". Regarding the head oil feed it is listed as *required* if roller rockers are fitted by a number of sources including Moss-Eurpoe and Jigsaw racing as are tubular pushrods. I'm happy to bow to mor expert opinions however, just letting you know what i've been told