volvo D24T diesel, it's running

[IRoll]

Hey thanks a lot Itzdshtz,

I don't know why they didn't fit. I trust my machinist, he knows what hes talking about, maybe I ordered the wrong ones?

I called the Volvo Dealer, they no longer stock them in the country :? ...

Good news though, my machinist found some that will fit, he said their out in Chicago. They'll be here in a few days, and I can start reassembly. Whoop!


      -E

[scopefrfd]

on the headbolts...I've personally have never had trouble with the oem bolts and I've run 25 psi+ on the 1.9tdi's.  It's probably cheaper to buy 2 sets of ARP bolts as opposed to raceware.  I plan on limiting boost to 20 psi and fuel it accordingly.  

I've haven't had time to really work on the volvo.  I've installed a EGT and some oil temp and pressure gauges.  My wastegate has gone bad and I need to replace it...the blow off valve opens at 18psi...so I haven't been able to go full throttle.  I also have to replace the glow plug relay it won't power down.  I found a new one on ebay "cheap" in volvo terms.

I will say this D24t is a super strong engine..the turbo spools right up and it hits 18 psi very quickly.  I was able to get my hands on an actual D24tic factory intercooler some of the parts have come in from germany..when it all arrives I'll put that in.  It looks like I'm going to have to use a D24 n/a intake as I wasn't able to get the tic intake manifold.

So far at part throttle I've only been able to hit about 900-1000F EGT pre-turbo...and the oil takes forever to warm up, according to the gauge.

[jtanguay]

maybe a faulty thermostat??? low EGT's hmmm... time to increase the fuel?  :twisted:

[scopefrfd]

the low EGT's is caused by the inoperable wastegate...the more fuel the more boost...so part throttle the engine is already making 18psi..which is a real positive considering how big the turbo is...I do have a tic intercooler on the way.  Once it arrives I'll work on replacing the faulty wastegate.

I did put in a lower temp thermostat a 80c/176F and it's definitely keeping the oil temps down in check.  Engine warms up quickly so I do not think it's faulty.  

The D24T is a very detuned engine...more so than a 1.6td.

[IRoll]

Is the D24 n/a intake better then the D24T intake? I have often wondered about this. The n/a intake has longer tubes running to the head(I'm sure there's a name for them), but is this to its advantage? or disadvantage.

Also, I've heard that the intake manifold is a bad setup because all the air comes in at one end, thus the cylinders at the other end wouldn't be getting as much air. Would it be advantageous to cut/weld the inlet hole in the center of the manifold? Or does this even matter cause its a turbo and its all pressurized?

I don't have any experience when it gets down to this little nitty gritty stuff.

And Congratulations Scopefrfd, I got mine running/inspected as well. Do you know what sort of mileage your getting? My odometer isn't working properly, so I don't know what I am getting yet.

Thanks alot.

-E

[scopefrfd]

The D24 intake in my opinion is a better intake than the D24T.  It has a larger plenum and longer and larger runners.  I think all the cylinders would fill the same since the intake would be under pressure.

Another great upgrade for the D24T is an electric cooling fan setup from a 940.  I finally hooked up mine and it runs great.  The only drawback is the volvo fan relay is triggered by ground/neg switching.  So I could only use the high speed switch for the radiator cooling.  I wanted to use the low speed fan position when the a/c comes on but I can't as the a/c clutch gets a +/positive signal when it's switched on.  

I'm sure I've gained a few ponies and hopefully my mpg will improve.  Next up will be the intercooler.

[vixentd]

Just use a relay with the plus signal.  Use the negative to ground out the relay.  Works perfect.In other words your plus signal opens a ground that supplies a negative signal by using a relay. Instead of having the relay turn power on it turns on a ground with a plus signal. Hope that helps.

[jtanguay]

Just use a relay with the plus signal.  Use the negative to ground out the relay.  Works perfect.In other words your plus signal opens a ground that supplies a negative signal by using a relay. Instead of having the relay turn power on it turns on a ground with a plus signal. Hope that helps.

yea same idea as installing a remote starter where the remote starter requires negative signals and you've only positive  

[scopefrfd]

I used the factory harness and relay from the volvo.  I like to keep everything oem is possible.  It's alot easier to get parts if something fails.