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The real problem with the factory cut-in temperatures for the cooling fans is not so much the water temperature, but the A/C head pressure. At least here in the South, A/C head pressures quickly reach the point where the torque required to turn the compressor exceeds the torque developed by...

Yeah, I understand about inaccurate senders: that's why I'm more inclined to monitor miles traveled on a tank. What annoys me is only being able to put about 18.5 gal. into an empty tank - by which, I mean the point at which the engine won't run any more. It's not a real big deal, but it...

Sure, "pump" octane; 91 or 92 (R+M/2)

Except with a C4 car with a knock sensor; all TPI cars at least had knock sensors, and if you are getting audible spark knock under any condition, you've got a bad knock sensor. Higher octane in an L-98 will *always* give more horsepower, up to about 110 R.O.N., due to the way that engine was...

Well, I'd have been talking about an apples-to-apples comparison. More specifically, L-98's will run more spark with more octane on up to about 110 Research octane, equivalent to maybe 98 - 100 "pump" (R+M/2) octane rating. And with an L-98 at least, more spark = more power. About 260 - 265...

There is one more small point: with higher combustion chamber temperatures, your engine is just a little more inclined to detonate, so it's a little more sensitive to fuel octane level. With the knock sensor looking out for you and dialing back the spark as required, you'll never notice the loss...

Thanks; I'd never even heard of the fuel tank bladder before yesterday.

Re: The Tempature is Rising The problems here are (1) higher water temp = higher intake air temps, since the intake plenum etc. gets heated by the engine; (2) higher water temp = higher oil temps, and oil life is cut in half for every 20 degree F increase over 160F; (3) Jerry Watts doesn't...

I also found something describing what I had originally suspected, but since this also comes from a ZR-1 site, it only addresses later models: My question regarding this issue is: Is there a way to tell if you have the "rubber extension" on the fuel fill pipe, and is there a way to remove it...

A couple months ago, I started a thread about fuel tank capacity. My '89 won't take more than about 18.5 gallons even if I run it 'til it stalls; and yes, running it 'til it stalled was done on purpose - to find out the fuel capacity! Various other owners noted that their cars had a bonafide...

Aubrey is in Denton County, north-northeast of Ft. Worth. Quite a ways from San Antone - unfortunately. And Ken: I knew you knew that, about the fuel octane ratings! :) I inadvertently addressed my post to the wrong person.

Just a little extra feedback, Ken: even an L-98 runs fine with regular. I've run mine about 50,000 miles on regular with no problems, just noticeably less power than with premium - but still more than most anything else on the road! The knock sensor takes care of everything. If you don't hear...

Two added points: That restrictor in the pump outlet is necessary; if you open it up or remove it, you'll get overheating of the p/s fluid. And as suggested elsewhere, the pump whine is undoubtedly due to fluid foaming and pump cavitation, quite possibly due to something as simple as a bad...

Dale: You need resonators of some sort to break up the pipe lengths in your exhaust system. You're getting an "organ-pipe" effect, where the acoustic resonant frequency of the pipes matches the standing wave frequency of the cabin. Since the Flowmaster mufflers do nothing to attenuate that...

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Will Do. Title will be "Dual-Mode Mufflers". - R

Thanks for the tip; this thread has now officially come full circle, and should be terminated. My originating post said "...I know that, having run mine completely dry, it doesn't hold more than 18.5 gallons or so unless you fill the filler neck. " and I later added, "You put in a little can...

Graham, P-ColaVette: The paint idea has been known to work pretty much like you described, except for one thing: the place where the paint is burned off the pipe will be correct for the light-load condition experienced in driving around the block. To get the optimum location for best...

Roger that; will do. - R

Well, not to make too fine a point here, but if the "usable" fuel tank capacity is merely 18 gallons, say, then that's what I'd call an 18-gallon tank! If it's going to be called a "20-gallon" tank, then it not only has to let me put 20 gallons into it, but I've got to be able to get 20...