Fans Installed on Stock Whipple LTR
07-28-2018, 08:24 AM
#11
Senile member
Typically SPALs are quieter and move a bit more air than generic fans.
Would you be able to utilize a temp-based system to turn the fans on according to charge air temps?
Would you be able to utilize a temp-based system to turn the fans on according to charge air temps?
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chimmike (07-30-2018)
07-30-2018, 03:56 PM
#14
Blown Member
Thread Starter
After running the fans for a few days on the smaller Whipple LTR here are my observations.
When idling for a few minutes the temps will rise but at a much slower rate. When I start moving again the temps drop at a rapid rate. After giving it a little thought I know why it reacts this way. When idling the air is recirculated a lot through the bypass valve and very little fresh outside air is pulled in to the system. The turkey pan (what we called the bottom of the intake manifold where the intercooler resides) is heated by the engine. With no air moving around the pan and very little coming in the throttle body the temps rise. In the meantime the fans and intercooler water pump are still cooling the liquid way more than if you had no fans. As soon as I start moving, the throttle is opened flushing out the hot air. As the fresh air is coming in through the intercooler (which the coolant has kept cooler) the temps measured by the MAP sensor drop rapidly.
The fans are no magic bullet but at the track and stop/start traffic they should be worth the trouble.
When idling for a few minutes the temps will rise but at a much slower rate. When I start moving again the temps drop at a rapid rate. After giving it a little thought I know why it reacts this way. When idling the air is recirculated a lot through the bypass valve and very little fresh outside air is pulled in to the system. The turkey pan (what we called the bottom of the intake manifold where the intercooler resides) is heated by the engine. With no air moving around the pan and very little coming in the throttle body the temps rise. In the meantime the fans and intercooler water pump are still cooling the liquid way more than if you had no fans. As soon as I start moving, the throttle is opened flushing out the hot air. As the fresh air is coming in through the intercooler (which the coolant has kept cooler) the temps measured by the MAP sensor drop rapidly.
The fans are no magic bullet but at the track and stop/start traffic they should be worth the trouble.
Last edited by LTNBOLT; 07-30-2018 at 04:01 PM.
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OCMike (07-30-2018)
10-19-2018, 09:07 AM
#15
Senior Member
For the guys thinking they are going to run fast times with the whipple.
This mod is a must.
This mod is a must.
10-19-2018, 09:34 PM
#17
I'm of the opinion that there is never enough heat exchanger with positive displacement superchargers. Have any of you Whipple guys thought about installing a secondary heat exchanger, or a larger aftermarket one? When I was looking at upgrades for my Roush truck I found a few rather large heat exchangers for not a whole lot of money that fit other platforms. When I added my secondary heat exchanger, heatsoak became pretty much impossible.
10-19-2018, 09:41 PM
#18
TOTM Sept. '18
iTrader: (1)
I'm of the opinion that there is never enough heat exchanger with positive displacement superchargers. Have any of you Whipple guys thought about installing a secondary heat exchanger, or a larger aftermarket one? When I was looking at upgrades for my Roush truck I found a few rather large heat exchangers for not a whole lot of money that fit other platforms. When I added my secondary heat exchanger, heatsoak became pretty much impossible.
Mike
10-20-2018, 12:06 AM
#19
Blown Member
Thread Starter
If you have the larger Whipple heat exchanger you can use 12” fans which have more blades.
I have the original size heat exchange so I had to go with 10” fans.
I have the original size heat exchange so I had to go with 10” fans.
10-20-2018, 01:10 AM
#20
The best dollar to surface area ratio I found was a quad pass unit from MercRacing for $399, measuring 22x17x2.5 (core size). That's bigger then the units from Afco and VMP which are 22x13, and it appeared to be of similar quality. Edelbrock as makes various universal heat exchangers, some of which are HUGE, but also pricey. Their biggest is 34"x14"x2" for about $750. I personally added a 34"x7"x2" heat exchanger from the old Saleen Extreme S197 mustangs, and it works great in addition to my stock Roush heat exchanger whis is mounted with a shroud in the bumper.
My next step is the GT500 pump, though its not really needed based on my IAT's.
My next step is the GT500 pump, though its not really needed based on my IAT's.