My Spitfire is an early car (so early fixed spring rear suspension). I have a full late suspension with a Limited slip differential. So my question is can I convert a early car to a late style if I have the complete suspension and if I can will I be allowed to run in HSR and SVRA?
Need to ask this over on the Classic Motorsports side. There is a vintage racing forum there. And more people that race vintage too.
In reply to wlkelley3:
Done.
I can't even find the rules for HSR.
Most clubs go by the GCR for the year of car. So if you google SCCA GCR Spitfire it will likely tell you all you need to know. I have a GT6 which they allowed me to modify from Rotoflex axles to CV's on the basis that the rotos are a hazard as it is no longer possible to get decent ones. Changing out an early swing axle would probably be encouraged.
If they have any sense they will allow it.
Hell, even in the SCCA Solo rules, I remember reading a specific line about adding camber compensators to early swing axle cars. Making the tail end of a Spit less flip-happy has been a known issue since the cars were new and first raced.
It is strange that HSR doesn't have rules available online. SVRA has a specific pages for each car in addition to the general rules. It's likely the rear track spec would almost require updating an earlier car to later specs. HD axles are also allowed/recommended: http://www.svra.com/SVRA/SVRAHome.nsf/attachmentweb/EJEN-68VKHW/$file/TR+Spitfire.pdf?OpenElement
I can't swap a differential from a late car into an early one correct (without major fabrication). I was thinking they were fairly different.
93EXCivic wrote: I can't swap a differential from a late car into an early one correct (without major fabrication). I was thinking they were fairly different.
There were some variations in the flanges, but I've never heard of there being any difference in the actual housing and mounting during the entire Spitfire/GT6 production run.
VSCDA uses the 1972 GCR with continuation cars allowed in. You can update older cars to 72 specs. Lots of TRs running newer/custom front spindles, volvo rotors, toyota calipers - just can't change things like lever shocks to tubes without getting bumped to a modified class. A TR-specific guidelines suggests changing the rear to a floater on a safety issue. My ford rear isn't super popular with the triumph guys, but the only shop doing the triumph axle conversion went out of business and isn't sharing info. I'm not sure on how stringent HSR or SVRA tech is, but that woudn't draw a second look up here and probably a preferred update.
maybe google the friends of triumph archive and see if you can get specific info or throw it out on kas kastner's site on the forum page.
I'd say call the clubs in question. There's what's allowed and also "what's allowed," if you catch my drift.
On a related note, did you know that you can run a Miata with HSR? We are so there.
Well according to the guys at HSR, there would be no problem with them. I will contact SVRA tomorrow.
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