Wednesday, May 29, 2002 10:25 AM Dziuba, Larry wrote:
> Could the overheating problem be related to a set of similar cars
> i.e. all w/ heads shaved down more than usual thus higher
> compression and related temperatures, or, cars w/ modified engines
> that run harder? Just a thought. maybe a survey would turn up
> something common. Larry.
I had a valve job on mine a year ago. Head was to factory spec, and
not warped. Car ran WAY better after the valve job, but vaporlock
symptoms persisted. The only mod's I've got are non-smogged, EI
distributor and Ztherapy carbs, otherwise it's pretty stock.
Fred Schroeder posed:
> I've heard so much about overheating and vapor lock.
Well, I think there's only a couple of us making a lotta noise :) .
> I've driven the snot out of mine all over the country including the
> Arizona desert. (Arizona-Sonora desert to be precise.) We're
> talking 110 to 115 degrees in July and August.
OW, OW, OW!!! Sitting on black vinyl seats?!?! OW!!
> It has never run past half scale on the temp nor has it ever vapor
> locked.
Interestingly(?), I've NEVER had a temp problem either.
> It is (and was) 100% stock with the exception of the non-smog
> distributor advance. Considering the circulating fuel supply system
> on the Roadsters I can't imagine why they ever would vapor lock.
I agree! I was astounded when I pulled the return hose and found COOL
gas flowing back to the tank!
> I wonder why some have problems and others don't?
My conclusion/suspicion is that 'vaporlock' is a symptom-
description, not THE problem. Kinda like Dr's that can't figure out
what you've got so it "must be a virus". I admit I'm still baffled how
mine would *act* vaporlocked - lousy idle at traffic lights on a hot
day, and not when cold (or moving) and not be vaporlock. Anyway, I now
conclude that if I'm having vaporlock symptoms, something needs fixing/-
adjusting. I figure if the fuel flow is that cool, the only place it
could boil might be in the float bowls?
dan neff '69 2000
colorado springs, co
http://www.wycroc.org
/// datsun-roadsters@autox.team.net mailing list
|