Nice nice, sounds good, what upset you?

Also, you are gunna have to find another buyer for one of the IC's I splurged on a Garrett core.

Scorke

 

This testing has good potential. Curious about how you are handling the effect of the cores' differing thermal masses.

 

94awd, when you do this testing..........just for your own information, switch the temp probes and pressure probes from one side to another and check them. Most of the cheaper units vary from one to other so it is very hard to determine which one is dead on.

I used some boost gauges and temp gauges a few years ago doing some testing and they all had variances.

Just letting you know to check it as you go.

 

What does that mean?

 

I could write three pages on all that has transpired. I will give the readers digest version. I am doing this intercooler testing to improve the performance of what I am currently running which is an AMS core. The testing of the AMS core by nisie shows the performance of the AMS core can be improved upon in the cooling departmant. One of the reasons I was doing this test myself is because I haven't seen any relevant data on what is needed for an intercooler when running meth injection. Spraying methanol changes intecooler requirements in a big way. The number one characteristic is low pressure drop. I.E. a free flowing intercooler.

Friday I did some quick tests. I bought some cheap china made temp gauges at harbor frieght. They mimic the more expensive version of what I have on the way. I played with them for a couple of hours to see if they would be worth using. I determined the temps are off a few degrees but the readings where very repeatable. And they where very very fast at temp changes.

I have three omega fast acting probes installed. no1 in the lower IC pipe about 12inches after turbo. No2 in upper pipe about 8 inches after IC. And a third at the throttle body. The alky jet is placed 16 inches after probe no2, but well before the no3 TB probe. This setup will allow me to see how affective the IC is at dropping temps and what the final temp is after the meth does its job. It also allows me to switch ICs out with out having to change probe placement.

When nisie tested the AMS core they tested in 60 degree weather. They got a 54 degree temp rise at the end of 4th gear. I tested in 86 degree weather. I do a hard pull through 4th. turbo out was 310. Temp rise after cooler (no2) was only 7 degrees! these results threw me for a loop for 24 hours. Here I was about to test 9 intercoolers and the one I am trying to improve on is working damn good. I am thinking something is wrong, no way should the IC be working that good. I first considered if maybe the meth jet might be spraying a little backwards. Though that doesnt seem possible to go backwards against airflow 16 inches.

It took going to the track to find out what was happening. Car runs fantastic on the streets where it is tuned. At the track the tune goes south and runs horrible.

Reason this happens is my meth jet is placed before my BOV and my BOV is rerouted to intake of turbo. This means between every shift the BOV sends the IC a nice little shot of meth to greatly improve the efficiency of the cooler. The problems with this setup are many. One of which is the A/F is largely inconsistant. There are a few posts on here of people complaining about running meth injection and getting gear based A/F. I get 11.4 in first and slowly richens to 10.5 in 5th. I am quite sure this is due to the increased wetting of the inner core with meth. Interesting to note is I saw this same A/F gear based progression on my AEM powered mirage. That car was setup with meth jets after the IC but before the BOV. Car blows meth into engine compartment in between shifts. I now believe that some of the meth is being sucked right back into the turbo causing the same effect. Track performance suffers as the intercooler starts off bone dry after a long wait in line.

As far as intercooler testing goes. Obviously at minimum I have to stop recirculating meth to get any kind reliable results from the IC testing. Ideally I want to switch my meth setup to one that does not overrun meth. Thats it for now. Hope you have gained some knowledge. I shure have.

 

Very cool testing. I can't wait for the results. Thanks for taking the time and expense for the data.

 

Why not test without the meth for now? Run a 93 map.

 

1.5 bar external wastegate. Runs about 22.5psi with no boost controller. 560cc injectors max out around 17psi.

 

God damn. What turbo is this?

 

Uh..............I am glad you had the guts to post what you did but I am very surprised that you didn't know you cannot possibly place the alky jet before the BOV. It needs to be directly in front of the throttle body...........little late to tell you that now as now you know.

Are you testing the AMS intercooler that Ebay knocked off or their large race version?

 

Dave when you are driving your car hard on the road at high'ish boost, what type of temperature rise above ambient do you normally see? I know in your test you report 7 degrees F above ambient. But I'm just curious what type of expectations customers should have from your race intercooler. Do you have any AEM logs from driving on the road where you might recall what the ambient temp was?

 

yeah 94AWD thanks for the honest feedback. it is good to have someone who opens up about thier real results! preciate cha! looking forward to the results

 

There are lots of threads debating where the alky jet should be placed. And there where plenty of people saying they liked it right after the cooler to get maximum cooling affect. The debate was always whether it was safe or not to BOV to atmosphere and blow meth into the engine compartment. My thoughts where the meth evaporates too quickly and there is too much airflow in the engine compartment to be a problem. I have never seen a post about the meth being recirculated through the cooler. If you can pull one up then I will be embarressed. Yellow car was run like that for 1.5 years with seemingly no ill affect. Blue car has been like this for months and halls but at 22.5 psi. Will be out tonight racing as usual.

I will be testing the AMS street against the ebay 15row cast endtank copy. And thanks for the tip on swapping probes and sensors.

 

I did another quick test yesterday. Plugged return for BOV and let blow off in engine bay. Got a 22 degree temp rise with ambient 82 and TOT at 297. Car felt a little slower even though a/f looked about the same. I am thinking the meth cooling the cooler does a good bit to make the air more dense. But just a theory at this point. Hard to tell without a g-tech to confirm hp . I have probe extensions on the way. no way can I stop and pop the hood to see temps after every pull. I just need a g-tech to start testing. If anyone has one they can sell let me know.

g-tech pro RR wanted.

 

How is everything going?