Hummer Forums by Elcova  
Forums - Home
Source Decals

Source Motors
Custom. Accessories.

H2 Accessories
H3 Accessories
Other Vehicles

H2 Source

H2 Member Photos
H2 Owners Map
H2 Classifieds
H2 Photo Gallery
SUT Photo Gallery
H2 Details

H2 Club

Chapters
Application

H3 Source

H3 Member Photos
H3 Classifieds
H3 Photo Gallery
H3 Owners Map
H3 Details
H3T Concept

H1 Source

H1 Member Photos
H1 Classifieds
H1 Photo Gallery
H1 Details

General Info

Hummer Dealers
Contact
Advertise

Sponsored Ads










 


Source Motors - custom. accessories.


Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 06-25-2007, 02:13 AM
OrangeCrush OrangeCrush is offline
Hummer Guru
 
Join Date: Oct 2005
Location: Charlotte, NC
Posts: 2,767
OrangeCrush is an unknown quantity at this point
Default Cooling issues...

Okay, where to start....

When I put the supercharger on (Maggie) I installed a two core aluminum radiator. I installed twin electric fans (4600 cfm) but they did not come with a shroud. I thought I was ordering the set and they had shrouds but apparently not.

The recommended place to put an intercooler is immediately behind the grille.

Instead I bought a larger intercooler and mounted it in front of the condensor. (thus making me mount the oil cooler between the radiator and engine)

I then put the transmission cooler where the intercooler should go.

Anyway, the truck runs a hair over 210 (still have the 190-195 thermostat in it, when I put the 160, it overheats)

Today was in the high 90's and the truck ran into the 240-250 range in stop and go traffic.

I guess my question is, Summit racing sells a dual fan (6000 cfm) setup with shrouds.

Do you think shrouds make that much difference?

Thanks,

Mark
Reply With Quote
  #2  
Old 06-25-2007, 02:39 AM
ttkresurfacing's Avatar
ttkresurfacing ttkresurfacing is offline
Hummer Veteran
 
Join Date: Feb 2006
Location: Charlotte, NC
Posts: 181
ttkresurfacing is off the scale
Default Re: Cooling issues...

I take it that thermostat didn't work right?
Reply With Quote
  #3  
Old 06-25-2007, 03:16 AM
HUMTECH's Avatar
HUMTECH HUMTECH is offline
Hummer Authority
 
Join Date: Sep 2003
Location: Canada
Posts: 1,251
HUMTECH is an unknown quantity at this point
Default Re: Cooling issues...

When I did my small block conversion in my Jeep, initially I had no shroud and engine temp would peak at about 250. Once I installed the shroud it only peaked at 215. That is using A fan clutch, no electric fans.
Reply With Quote
  #4  
Old 06-25-2007, 08:35 PM
H2 Bill H2 Bill is offline
Hummer Professional
 
Join Date: Feb 2003
Location: Palm Desert, CA
Posts: 470
H2 Bill is an unknown quantity at this point
Default Re: Cooling issues...

Yes, you need the shroud. It will make a huge difference.
__________________
2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Dynatech long tube headers, catback,18\" Ambush w/Toyo MT\'s,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo\'s, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev Suburban Blown
1970 Trans Am balanced, blueprinted, ceramic headers, etc.
Reply With Quote
  #5  
Old 06-25-2007, 10:04 PM
KenP's Avatar
KenP KenP is offline
Hummer Messiah
 
Join Date: Apr 2003
Location: Virginia Beach
Posts: 37,474
KenP is an unknown quantity at this point
Default Re: Cooling issues...

I never had a problem with that, but Fubar did. He went through all kinds of crap.

I don't know if it was ever corrected.

Get the one with the shrouds and be sure to install a cutoff switch in the cabin. This way you can turn it off when you charge through a deep water hole. I shredded a pair of fans deep on the trails doing that. We went back to the original fan clutch after that.

Good luck.
__________________
"My reading of history convinces me that most bad government results from too much government."---Thomas Jefferson
Reply With Quote
  #6  
Old 06-26-2007, 03:24 AM
ttkresurfacing's Avatar
ttkresurfacing ttkresurfacing is offline
Hummer Veteran
 
Join Date: Feb 2006
Location: Charlotte, NC
Posts: 181
ttkresurfacing is off the scale
Default Re: Cooling issues...

Mark,
I just bought that other set of dual fans that you didn't like the shroud on. I got them for a REALLY good price of course. Why don't you try them out when I get them and see if they help. Ifo so you take them, if not I'll put them on the back hatch of mine like a jet car.

Tim
Reply With Quote
  #7  
Old 06-26-2007, 04:27 AM
OrangeCrush OrangeCrush is offline
Hummer Guru
 
Join Date: Oct 2005
Location: Charlotte, NC
Posts: 2,767
OrangeCrush is an unknown quantity at this point
Default Re: Cooling issues...

Tim,

I'm sitting on my couch right now double checking dimensions. I just went out to the truck to measure the the size of of the radiator.

I'm getting ready to order this.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=FLX%2D284&N=700+4 00226+115&autoview=sku

Didn't we measure the width to be 32"? If so, this will make a tight fit.

I'm going to have to spend almost 600 bucks on these fans and then I want to get a new transmission cooler with a fan and mount it under the truck.


The ones you just bought I don't seeing as being very helpful. They're more cfm but still without a shroud and I honestly think that's my biggest problem.

Mark
Reply With Quote
  #8  
Old 06-26-2007, 05:14 AM
ttkresurfacing's Avatar
ttkresurfacing ttkresurfacing is offline
Hummer Veteran
 
Join Date: Feb 2006
Location: Charlotte, NC
Posts: 181
ttkresurfacing is off the scale
Default Re: Cooling issues...

Mark,
I think it was just over 31. Well you are more than welcome to try the new ones out first if you don't buy others before hand. **** for the price they cost you could have a custom shroud made and still probably half the others price. Just a thought.

Tim
Reply With Quote
  #9  
Old 06-26-2007, 07:50 AM
HUMMERcustoms.com/TAZ's Avatar
HUMMERcustoms.com/TAZ HUMMERcustoms.com/TAZ is offline
Hummer Authority
 
Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
HUMMERcustoms.com/TAZ is off the scale
Default Re: Cooling issues...

Mark

Shrouds are needed for sure. It is strange the cooler stat did not help so i would ask for a trade and still go with 160 stat. You can of course test it in a pan of water on the stove but, that would not mean it will not malfunction the next time.

The best fan setup yet is getting the electric fan setup of the GM HD pickup trucks. They even match the place to hang on crossbar but, you just have to drill holes in shroud on top to match factory holes. They will also allow you with a tune tap into rigs computer to turn the fans off and on. I have been able to hot lap my H2 during tuning and other tests without the rig heating up in any runs.

Shroud is needed though. Good luck!! You may be able to use fans you have and just buy the HD shroud to mount over fans you have. The HD shrouds actualy hold the motors etc. but, You may find a shroud that will still mount in the same way and maybe probem solved. Worth a look anyway.

TAZ
__________________
05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
Reply With Quote
  #10  
Old 06-26-2007, 11:40 PM
OrangeCrush OrangeCrush is offline
Hummer Guru
 
Join Date: Oct 2005
Location: Charlotte, NC
Posts: 2,767
OrangeCrush is an unknown quantity at this point
Default Re: Cooling issues...

thanks guys, before I order the electric fans with shrouds, I threw the clutch fan back on. I realize there is a HP loss and I still don't have a shroud but hopefully it'll help... we'll see.

I'll let ya'll know when I get stuck in traffic.

Mark
Reply With Quote
  #11  
Old 06-27-2007, 12:20 AM
H2 Bill H2 Bill is offline
Hummer Professional
 
Join Date: Feb 2003
Location: Palm Desert, CA
Posts: 470
H2 Bill is an unknown quantity at this point
Default Re: Cooling issues...

You are still going to have the same problem without the shroud..
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 08:48 PM.


Powered by vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.