neihouma

Well today I got to dyno my C32 and Donn's C32 (dkflipse)

Here are some IAT's for your viewing:



Donn's C32 w/the Code3:





My C32 w/the LET:










I did try to get some stock C32's but none of them could make it. Maybe
another day. This dynoing back and forth is getting damn expensive. I've
been to the dyno over a dozen times already. I'm done for a while.

moosejaw

I'll dyno next year b4 I get my mods to est. a baseline

Eurocharged Rick

very nice rey, thanks for posting the results!

AWDman

Rey, pl tell me what gears (boost varies) for the runs. also why does the temps spike during changes?

neihouma

The datalogger only records every 5 seconds, not every second, thats why
you see the spike.

Also the spike means that very second (every 5 second) it was increasing.

TopGun32

not to be bias.. just an observation...

the spikes are no problem.. as you can see the HE quickly brings temps down.

On the other brand, the cooling is not a quick. You notice the temps drop with a "fade effect"

however.. the other brand..is running lots mods. ASP creates lots of heat.

You also have to consider the type of coolant or mix of water, type of pump and what are the mods (pulley size)

I rather see this type of testing "on board" Laptop set up.

splinter

neihouma, thank you again for your informative posts.

Looks as if both work admirably. It’s cool (literally and figuratively) having both reasonably priced units available. If I am reading them correctly, the X-axis scale varies from test to test. Regardless, mine works very well.

neihouma

I agree I'm a paying customer as well, just stating what I see with my eyes.



Spikes ARE a problem, whatever gets COOLER IAT's means less TIMING
will be pulled

That fade effect is a combined effort of the IC pump and Heat Exchanger,
since we both have the Johnson Pump, it's really a matter of which HE is
more efficient

Thanks, I've heard that before my C32 PEAKS less in IAT compared to
Donn's Renntech pulley, although we both make 18.5PSI, thanks for bringing
that up!

I was at Donn's house installing temporarely a SVT lightning pump because
his stock MB Bosch pump failed, because DUE delays of his heat exchanger
delivery. His car kept on shutting down on him on highway to work and
back home. I specifically ADVISED him NOT to put STRAIGHT coolant, but
a gallon of coolant and rest in water or bottle of Redline Water Wetter and
the rest with water.

This is just as good as any, data logging is data logging.

430

So if my quick glance at the charts is accurate if I was looking to spend money on a HE I would send my money to LET.

c32used

God I wish I had half the knowledge you guys have.

Code3 Performance

I would say that IAT testing on a dyno is really not the greatest place to show off the efficiency of a heat exchanger. The numbers are interesting to see, but nothing more. Its just like the dyno numbers themselves. You can make 600hp. but if you are running 13s all day long, who cares Put the cars on the road and do some datalogging. I promise you that you will see much different results. I have numerous datalogging sessions with the C32 that show much better results. You can also check out the E55 forum where you will find all of our road based datalogging on the SC V8. On a pullied car, we are seeing max temps in the 120s, on back to back to back 120mph runs. There is a reason I road dyno the car. Testing with real variables gives real results. Interestingly enough, the IAT numbers Donn was seeing look like numbers we have seen when we had air trapped in the unit. We actually did datalogging when this condition occurred, and we saw temps just like he saw. After we got all of the air out, temps dropped dramatically. Just a thought.

dkflipse

Neihouma and I will certainly be going to the track soon. The results should be interesting. Though I certainly give him the upper hand with dragging/launching experience (as evidenced by the Florida Highway Patrol ) - which will obviously make a big difference.

sales@eurocharged.com

I ran my datalogger all day long at the track. My IAT's never went above 100°F, even after back to back 1/4 mile runs. I had the prototype LET HE on the car.

Just for the record, I think that when air is flowing, both HE's will perform the same.

splinter

It may be worth your while to share the numbers you have recorded with the C32 side. I’ve read your E55K data but not everyone here gets over there. When you first planted the seed in this thread, Fifth suggested:If you have already posted your C32 data, I regret that I have not seen it and would respectfully ask that you disregard this post in its entirety. In the spirit of full disclosure, I’ve purchased hardware from both gentlemen and it’s been excellent. I have no axe to grind.

AMG-Driver

Hello,

I'm interested in putting a larger HE in my SLK32. Do you also have this Plastic-Baffle for radiator air in front of the stock HE in the C32? I think this design routes the air to go THROUGH the IC and maybe when it is not there, the efficiency of the new IC is not at its optimum, because the air spreads more into the radiator. Any thoughts?

Kind Regards
Bruno

Eurocharged Rick

Bruno,

we are not reusing the Plastic-Baffle on the unit for the SLK32...it simply will not fit because the new heat exchanger is that much bigger than the stock unit...you will actually gain alot of efficiency with the new unit because you are increasing the amount of fluid in the system, the LETMotorsports heat exchanger core is more efficient than stock because you have more fins per inch and you are gaining more surface area for the air to flow over....

please let me know if you have any other questions...thanks!

AMG-Driver

Is the LET-HE for the SRT-6/SLK32 already available, maybe in a package with the Johnson CM30 Pump? Thanks.

Kind Regards from Germany
Bruno

Eurocharged Rick

Bruno,

the LET HE will be available right after the first of the year, should be done the second week of January...we will do a package deal with the Johnson Pump for $425 plus shipping to you...thanks!

CynCarvin32

Let me use one of these cars at willow springs raceway and I will let you know what my data logger says temps are after 15 laps! On a 102 degree day the temps hit 171 a the end of the front straight and fell off right away.

One dyno pull is not the best way to test!

Go race the cars!

Eurocharged Rick

do you have a HE on your car right now?

neihouma

It's a never ending epic Erick, don't beat yourself to death about it because
when you please him with results, you'll stumble someone who isn't or find a
way to bicker about it.

This test was performed by two individuals with different companies product
on the same day, on the same dyno with the same dataloger. If you find a
way to knock on it fine, perform your own test and keep it to yourself.

I merely did this thread because people are curious, the dyno I go to is close
to me and I have a dataloger, so why not right?

splinter

If I’m not mistaken, those laps at Willow were in smgC32’s well-tweaked machine. They ultimately recorded a 1:35.02. That is hauling some serious speed in a lowly W203. They know how to get after it! smg has since moved on to a 335i. CynCarvin32 has remained loyal to the marque, albeit in its more desirable variants.

AdamG@NorCal

Sorry for the OT

The problem is not when the car is running. We have performed a dozen of tests using our data logger and we found out having a bigger HE helps only when the car is on the road getting cold air.




1st column: Calculated load %
2nd column: Coolant temp
3rd column: IAT

The real problem is when the car is idling when it is on the drag strip. The motor heats up way too quick (especially for those running a higher boost)



1st column: Calculated load %
2nd column: Coolant temp
3rd column: IAT