Im looking to buy a new H/E, I know of only 2 that are out right now,(cobalt addiction and LFP's). I was woundering if anybody knows if there are any difference in these two or any other one's that are out.

 

Nobody has any opinions!!

 

All I can say is I love my LFP HE...

 

From my seat the jury is still out on which one is the best. The only one that has been tested even close to what I would like to see is ENUFPWR with his stock HE + stock HE setup. He has seen close to a 30 degree improvement in AIT2 temps with an HPT data log. The other advantage is the fan can cool both HE's in this configuration.

What do I like to see....I want to see a 0-10 MPH start then WOT to the top of 3rd gear measurement being taken at the top. A 1/4 mile drag run is nice. The ability to keep AIT2 low in the staging area is a plus. I also like to comare AIT1 with AIT2 at say a 40-60mph cruise. The closer the two are the better.

The stock cobra (addiction) seems to be in the same ballpark as the Stock + Stock although some people have reported in increase in AIT1. It's not much and the intercooler efficiancy shoud minimize the difference. Id like to see more data though.

The LFP core is much thicker than the Cobra core but 2 X thickness does not have 2 X the efficiancy. There should be a lot of fluid holdup so it can store a fair amount of BTU's. There is not much data on this one but it looks like it will work well and certainly should be a bit better than the other 2.

Stock and stock cobra should be very inexpensive to install and good bang for the buck. The LFP is $325 ballpark. MAF based methanol/water injection is just a few bucks more and something to consider as an alternative to the LFP exchanger.


Pierre

 

Pierre,

Have had a chance to check out a drag run with WI?

I've heard there is still a 30-40 degree ramp from 1st to top of 3rd but the temps are cooler. Have to ask Rob if he can send one of his logs to check out how well that WI works. Combined the two might help keep the heat down of these 2.5 pulleys. They really heat things up.

 

Not a drag run but some obsevations of a dyno run which I got second hand. Not shure I trust it completely but it's a trend. Yes I think it would work better than the LFP for a similar cost.

From what I've read the issues are pre or post blower. It appears that post blower will give you bigger temperature drops. You are not spending energy cooling the blower. Down side is how well is the mixture distributed by the spray nozzle to all 4 cylinders. I don't know what the answer is but it is worth asking. Spraying pre blower would make the mixture more homogenous you would think but if there are any turms the air has to make from the blower to the plenum the atomized WI fluid can't change direction as easily as air causing mixture distribution differences. This is a classic problem with carburators and intake manifolds. The othere issue I have spraying pre blower is what happems thermally. all materials have a coefficiant of expansion. If the WI cools the roters down more than the case the clearence will get larger. If the case cools quicker the the clearance can get tighter causing wear problems. I have not heard of any wear problems BTW. Spraying pre blower could also lubricate the rotor tips. cutting down on wear at high speeds. It might not seem so but a water/methanol mixture could be a fair lubricant. As far as coating wear it does not seem to be an issue but time will tell. Maybe the answer would be to spray pre and post blower :-)

Pierre

 

I'm going with enufpwr's set up...as if thats a suprise(well it might be if you dont know us) sence i've seen the evidence agenst the cobra style units.

and as Pierre put it...enufpwr is the only person to log the AIT's to the full exstent.

now the hard part becomes geting the stock unit at a decent price.

not the $390 that the dealers want for it.

 

I think for the money you can't go wrong with a Cobra H/E. That said, I haven't installed mine yet, just read what is to come. I don't think it is worth paying $300+ for the CA or LFP one..put your money elsewhere

 

How much does another stock HE cost?

 

dealer wants 390.

trying to find it else where.

 

Intense has them for sell if I recall, check there site.

 

I"ll have some new numbers to post up tomorrow night of the C/A h/e I've seen better numbers than whats on the site now... as I said in another post we did the run after having my car idling parked for a 1/2 hr to bleed the system, but from new measurements with the H/E and meth I've dropped about 80 deg of my iat2 if not more... temps havent been too stable around here lately so I'll do some runs tomorrow night on the highway and post them on the site.

 

If you can get something like a drag run test done. A short 10 sec burnout....then a 1-3rd gear pass to compare numbers on how the IAT2 heat up and cool down. Comparing numbers from start to finish in top of third is a good way to see the effectiveness of the heat exchanger. I've also seen my IAT1 and IAT2 drop significantly during idle for log periods,cruising around town, and on the highway. Big drops of 50-80 degree in temps too, but at the track after back to back passes 10 in a row to verify the HE was doing it's job I still see a 30 degree rise in temps during a drag run. I also think Rob was seeing a 10-30 degree rise in temps during a full pass also, but the temps were lower then before with the Water/meth injection.

 

No problem/// I'll try to have em posted up tomorrow night depending on how long the exhaust takes... and since my meth is non-functional for the time being (waiting on a solonoid) you will get to see the true numbers.

 

Wich H/E are you using?

 

Cool, but we also want the meth numbers to compare. I think that's where the biggest gain will be.

See how much of a difference that kit does to help out temps. We all know it works, but want to know how much of a temp drop does the meth injection give us.

Thanks

 

meth should be up and runnin tomorrow night... ... I"m using the www.cobalt-addiction.com front mount... if you check the site there;s a log run on there (screen shot) that was runnin the meth and h/e (car was sitting idling for about 30 min to bleed the system, so the temps started out pretty high), before both my iat2 was up around 245-250... now its down around 120 .

 

I only saw the HE log files. No WI. Did I miss something?

Pierre

 

oh I'm sorry I forgot he didn't put them up yet.... hopefully we'll get some runs in tomorrow night to post up.. we're trying a new setup for the w/i so I'll have to get back to you on it... I actually have them at my house... pm me your email and I'll send you some screen shots.

 

I seem to remember you were seeing 45-50 degree rise with just the stock HE. Like you say there are 2 components to look at. The actual rise during the run and how close to ambiant you start at. That will give the total improvement of the system. If IIRC your stock HE drag run AIT2 hit 173 degrees at 80 ambiant. HOT,hot, hot.

Pierre

 

yeah it used to gett pretty warm in there.... (21 psi) but now its fine car runs perfect... also I have my stock H/E for sale.... check it out under the for sale section

 

I Want It!

The Stock Unit Is Mine!

Pm Sent!

 

got back to you

 

Rats...I missed that one. Didn't look far enough down.

Pierre

 

there's been a f/s post up for about 2 weeks now on it.... guys gotta stay up on that stuff.