Ok we all know that on cold startup your 7 revs up to 3k rpm's. We think this is bad because of lack of oil, so we crank them in gear to bring the rpm's down to almost an idle.

I was doubting my MOP the other week so I asked Dave(KD) what was a simple way to check it. He said to take the MOP lines off at the pump, crank the car....don't worry because the MOP does not inject any oil at idle. He then said to rev it up to 1500 and there should be some small drips of oil slowly coming out.

Correct me if I am wrong but, wouldn't it hold true that when the car revs up to 3k on cold startup that oil is being injected in the chambers to lubricate the seals from the get go.

 

Yeah...but theres a lack of oil at first...no matter how you start it.

This is kind of a pointless post. With little to no oil in the housing on startup, would you rather rev your engine to 1.5 or 3?



Maybe I just missed the entire point of the post...

 

Actually, at startup, after your engine has been sitting, there is about a teaspoon of oil sitting at the bottom of the housing, so you're fine as far as that goes.

3K cold start is much more harmful to your turbos that your rotors or housing... no oil in them babies to be spinning at any speed until the temps come up a bit.

 

OK, granted people are smarter than me, but here's my testimonial. When i start w/ 3K warmup, i SWEAR the car runs better. Smoother, peppier, and better idle vacuum. Why? No idea. I know the previous owner always let it do this (he told me), and the turbos are working GREAT and look GREAT (i pulled them this month). I usually let it do the warmup every 10th time i drive. Just an arbitrary decision, i guess.
~Tom

 

"3K cold start is much more harmful to your turbos that your rotors or housing... no oil in them babies to be spinning at any speed until the temps come up a bit."

Ding we have a winner!! The only real reason for 3k start-up is to preheat the precat for emissions. So if you have eliminated your exhaust clog, I mean precat, then there is NO reason for a 3k start-up.

On cold starts without 3k you should have an idle of 1500 rpm with will be smooth. Rotary engines are not very efficient at slow rpms (rotor speed is 1/3 shaft speed!!) and that is exaggerated at cold temps. I have noticed that the car is quite smooth even when cold as long as it is at 1500 rpm. Also to note .... one reason not to remove coolant from the throttle body is the fast idle cam won't work right because it needs that coolant temp to work correctly!

 

is there an easy way to disable the 3k cold start?

 

just tap the accelerator.

 

... or start it in gear.

 

Starting in gear always disables the 3k cold startup jump. Kinda sucks because I've got a turbo timer so I leave the car in neutral when I stop. Which means that I've got to remember to put it in gear when I start it again... It's more difficult that it seems

 

i usually put it in gear when i start it, but can i disconnect something to defeat the cold start?

i heard that the PFC might eliminate the cold start, is this true?

 

Yes PowerFC eliminates it ..... you can also remove the hose from the intake pipe to a solenoid .... 3/4" hose near the firewall .... and cap it w/ 3/4" heater hose caps from an auto store. They are the same caps used to cap off the stock air box when venting BOV.

 

Time for my technical terms again

You know that pump like thingy on the passenger side of the intercooler to the rear car movement from the intercooler in-pipe...well that was unplugged on my car for like 3 days and I couldn't figure out why My car wasn't 3k starting, more like 1k or 900 rpm...

so maybe you could derive some in-line switch thingy to activate and deactivate the pump whatchamacallit and then re-actvate it to drive with the steering whats-a-hoozit...

although...I dunno if 3rd gens have the same thing...