JBP 4-Pass Intercooler
10-17-2006, 03:28 PM
#27
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Originally Posted by pierre
You will not see 5 PSI from any automotive intercooler pump in a working system. It's mostly thermal expansion that causes the pressure rise.
If you assume a perfect pump the time for the coolant to go all the way through 4 cores in series is the same as 4 cores in parallel.
Frankly I'd be more worried about balancing the coolant flow through 4 cores in parallel.
Pierre
If you assume a perfect pump the time for the coolant to go all the way through 4 cores in series is the same as 4 cores in parallel.
Frankly I'd be more worried about balancing the coolant flow through 4 cores in parallel.
Pierre
10-17-2006, 03:32 PM
#28
Senior Member
And noremorse and pierre are right, stock it is a 4 pass. You stated that it looks stock EXCEPT for 1 addt'l fitting which means it is a 2 pass or dual pass. Two inlets (stock inlet and outlet) and a fitting tapping where the second and third intercooler cores transfer makes it a dual pass and that is the outlet. Or vice versa really with one inlet (new fitting) and stock inlet/outlet as new outlets.
There was a shop that did a build of the LSJ and did a dual pass, then a 3 pass but there weren't noticeable gains for the 3 pass to be worth it.
Reference to page 8 of link: http://manual.lsjowners.com/ecotec300hpbuild4.pdf
On the left is the dual pass, the right is the 3 pass.
There was a shop that did a build of the LSJ and did a dual pass, then a 3 pass but there weren't noticeable gains for the 3 pass to be worth it.
Reference to page 8 of link: http://manual.lsjowners.com/ecotec300hpbuild4.pdf
On the left is the dual pass, the right is the 3 pass.
10-17-2006, 03:33 PM
#29
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Originally Posted by vandy0419
Why won't we see 5psi from out intercooler pump? Some are rated at 5 and some at 3, but the Bosch are rated at 7psi...GM doc 1471156 states under the intercooler system that it is rated at 7psi...
Because If you ever see 5-7 psi in your system, then you have a major bottleneck/restriction somewhere. If you plug somewhere in the line it may get up to 7psi, but that doesn't mean that is ideally efficient. Thermal expansion may get it up to 7, but that has nothing to do with the pumps rating. That is just the hot air/hot water pushing on the cap wanting to escape. I keep my cap on loose just to not let the thermal pressure build up.
10-17-2006, 03:34 PM
#30
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Originally Posted by 06blackg85ss
so two inlets (on what used to be the stock inlet and outlet) and one outlet ... in the middle of course... than that would be the dual pass setup... unless you got something else going on here... clue me in... I just did a dual pass on my car.. and saw a decent decrease in my iat2... is your setup different/more efficient... got any logs to show difference... not being a P.I.T.A. ... but I"m a glutton for info.
10-17-2006, 03:36 PM
#31
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Originally Posted by srt-killer
The dual pass setup you are talking about is that the C/A H/E? How much did your IAT2 drop? It would be interesting to compare these two setups.
10-17-2006, 03:38 PM
#32
I think I put a post about it up... but if not... I use it in conjuction with the c/a front mount... and I see during cruising an average IAT2 of 25-30 deg higher than ambient... I"m running a 2.5 pulley and with the meth my peak temps are around 130ish deg and the temp drops pretty much immediatly after a WOT run... maybe 2-5 min of reg driving and its back down to where it started... no more heat soak haha.... but I also have the meth injection which helps substantially. .
I think they'll have my logs posted on the site soon ....
sorry to hijack the thread JBP
I think they'll have my logs posted on the site soon ....
sorry to hijack the thread JBP
10-17-2006, 03:46 PM
#35
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i think this information is a little missleading
4 Specialty Laminova Tubes
- Replacement High Flow/Volume Pump
- Replacement Stainless Braided Steel Coolant Lines
- Modified Coolant Outlet Ports
- Double Inlet Ports
- Instructions for installation
your really not including any additional intercooler tubes only offering some braided hoses and some fittings and some modifications to an oem system
not saying its not worth 430 $ but i was a little confused when i read it and then read the rest of the responces that were made
4 Specialty Laminova Tubes
- Replacement High Flow/Volume Pump
- Replacement Stainless Braided Steel Coolant Lines
- Modified Coolant Outlet Ports
- Double Inlet Ports
- Instructions for installation
your really not including any additional intercooler tubes only offering some braided hoses and some fittings and some modifications to an oem system
not saying its not worth 430 $ but i was a little confused when i read it and then read the rest of the responces that were made
10-17-2006, 04:02 PM
#37
Senior Member
Originally Posted by 06blackg85ss
Well... from my standoint... I do know the end cao (with the inlet/outlet) is pretty damn expensive... over $150 from gm..
10-17-2006, 04:16 PM
#41
not really... but they do look good... lol/... but so far mine hasn't gotten hot enough.. or built up enough pressure to do anything to the plain rubber hoses... I actually have some of the stock rubber hose connecting to the resevoir cause I couldn't get the braided line to make the bend...
10-17-2006, 06:32 PM
#43
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Originally Posted by vandy0419
Why won't we see 5psi from out intercooler pump? Some are rated at 5 and some at 3, but the Bosch are rated at 7psi...GM doc 1471156 states under the intercooler system that it is rated at 7psi...
Do you have a link to the GM document?
Pierre
i just got my cobra heat exchanger so this weill help even more! 
10-17-2006, 09:40 PM
#45
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Quite the number of posts since I last left off.
At any rate, the pricing is very reasonable for what is offered with the system. The replacement pump, lines, fittings are all very expensive as mention by a few members.
There also is a optional surge tank (pending design), that will be available near the end of the year.
We're very excited about this product, we see it as a huge seller.
At any rate, the pricing is very reasonable for what is offered with the system. The replacement pump, lines, fittings are all very expensive as mention by a few members.
There also is a optional surge tank (pending design), that will be available near the end of the year.
We're very excited about this product, we see it as a huge seller.
10-17-2006, 10:37 PM
#46
Senior Member
Originally Posted by pierre
Vandy
Do you have a link to the GM document?
Pierre
Do you have a link to the GM document?
Pierre
10-17-2006, 10:46 PM
#48
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I am looking very foward to seeing these charts/graphs. This would be one of the first mods I do after Stage II, smaller pulley, intake, exhaust. Should see some nice gains, car should run better. Specailly with a tune.
10-18-2006, 10:10 AM
#49
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Originally Posted by vandy0419
What kind of pump is the replacement pump though?
EDIT: Also, what is different about the laminova cores?
EDIT: Also, what is different about the laminova cores?