Hot weather = smokey DD2s

[Vaughn MacKenzie]

With the temps hitting 95-96 degrees today I was surprised at how much smoke my truck was making running around town. I can understand stop & go driving running A/C will definitely make intake temps soar but I was surprised at the amount of power loss and smoke output. Of course without driving down the highway the intercooler will not operate efficiently. Dropping the hammer at each green light will result in some pretty high intake temps.

Has anyone else noticed their hot injectors getting noticeably smokier with 90+ temps? I could emit a decent haze even with the turbo spooled up, whereas before it warmed up I never saw smoke until close to WOT or off boost. I made some pretty good clouds of smoke (but not Piers of Big Bob caliber) just gunning it to change lanes.

I guess I should consider the PSA or some similar ducted air intake to help in this situation. This is also something I think a good set of electric fans could help remedy, keep air flowing over the intercooler at stop lights.

Tomorrow temps are going to run close to triple digits so I'm going to watch the EGTs closely and see how those compare to before.

Vaughn


[This message has been edited by Vaughn MacKenzie (edited 05-23-2001). ]

 

[CCahill]

Yea!! I've noticed it too.
I understand the PE Comp box will come with a setting that underfuels till boost comes up... . We could come out of the hole harder then, without everybody you, thinkin'... Dam# DAM% STINKIN DEISELS!!!!!!

Just thinkin... . I don't REALLY want another box!!! #ad


Colin

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2001 Quad,4x4,AT,4. 10LS,LB,Loaded enough,stock,mostly... . 65 Chevelle sedan, Hella nice driver, 53 Nash Rambler Convt,1 of 653 built,[not a Metro], GM drivetrain, injection, and auto/od
Specialized FSR PRO Stumpjumper,Cannondale F2000, Loaded
MTD Lawn tractor with flames Cummins ISB
12' fishin' boat, loaded. .

 

[MikeR]

You outta see them DDII's in 90+ heat out in Utah (high elevation). Smoke comes out just revving the motor sitting still!

 

[Vaughn MacKenzie]

What happened to this thread?? #ad
Was TDR offline most of the day? Looks like it according to the timestamps.

Anyway this afternoon it cracked 100 degrees here in SE Washington and my face looks like #ad
*LOL* So the weather was just right, nice 'n toasty, to see how the EGTs would fare. With the A/C cranked cruising around town, they were 75-100F above where they normally run, except accelerating briskly on the freeway onramp, the gauge shot to 1000F instantly #ad
That was only 65mph! Normally I have to push it much harder to reach 1000F. Also it takes 2-3 times longer to idle down to 300F just driving around town.

It is amazing how much of an affect hot weather has on EGTs, power, and smoke. The good news is temps are supposed to plummet to the mid 80s, but not 'til Sunday at least. #ad
'Til then, Mike, looks like I'll have to put up with a little more smoke #ad


Vaughn

 

[Diesel Freak]

GGGGRrrrrr the site was down for three hours!

Hot weather definately has an effect on power. We need to design an auxiliary intercooler to bring intake temp down to a constant 60F.
HVAC, are you listening? Got any large R-134 units for us to use? #ad


-Cliff

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2001 ETH-DEE, Diablo Power Puck, Bosch 275's, Practical Solutions Boost Module and Elbow, LFT Silencer Ring Eliminator, K&N, Straight Piped http://www.mudrunner.sites.cc

 

[David_VT]

I was thinking it was the switch from winter to summer diesel. Reading these posts makes me think otherwise.

Lately I notice my boost is really going high and I wonder if this is all related.

David