Update on my Post # 39 dated 08-01-2011
This is update on the following works that I just completed (as advised earlier in my Post # 39), together with some photos, comments & feedback; as best I could've collected & observed:
1) Installation of Dual 13 In. Elect. Cooling Fans (2 speeds): The workshop advised these “hi-perf. Dual elect. Fans” are donated from Jaguar XJ Supercharged engine. We fixed them into a custom-made shroud. I estimate each of the dual-fans to be of 13 inch, and I guess they together pull a total air volume in the range of 4,000 to 4,500 CFM! You really feels the massive amount of air being pulled while the fans operate at the 2nd higher speed (manually switched), and I keep it at the 2nd most of the time.
My FEEBACK:
Great while idle & it reaches @ 195F+/-; especially with the A/C on. But while driving, I noted the “elect.temp guage” (fitted & located right on top of the water-pump) goes upward & points @ 215~220F (at night) & it remain there even after I stop!! In our summer day-time, the ambient-temp gets much higher than the night & I suspect that the engine-temp will climb further!
Important to note that currently; my engine has no Thermostat, and I recall that with the same setup with the previous OEM mechanical-fan of the 8.1, the temp was reading around 195~200F while driving (was a bit less at idle)!
With this “discouraging performance”; am seriously thinking to switch back to the OEM Fan (sound but performance), but with the addition of “extra elect. fan” either: AA) in front of the A/C Condenser, or BB) inside the shroud to pull some cooling-air while in traffic, to cool down the A/C.
The Workshop advised me to hold on this decision; pending one more try (on his cost); to replace this Jaguar’s setup with that of 2008 or 2009 Denali, as he expects the latter will outperform both (the Jaguar’s as well as the 8.1’s), but am yet to determine!
I remind that, the current Radiator is new from the dealer, OEM Big-Bore Alum-core, suitable for 1995 454 (7.4L) engine for gulf Spec’s (i.e. high-temp conditions).
2) Installation of “4 inch Cool-Air Intake”: This was locally fabricated in a “perf. workshop”, but am still thinking to contain it within a sealed box; having the ‘air-inlet’ to be sourced from the factory existing side-opening in the passenger-side fender.
My FEEBACK:
It functions better than the OEM noticeably. However, I view that there is a high-need to insulate the ‘air duct/pipe’ from the excessive-heat generated by the engine. I may warp it (using a “headers-pipe wrap” or “warping it with a size-fit sliced rubber hose then holder it with a tie-wrap”).
3) Installation of A/C: The workshop custom-made a setup/blend of locally available parts (the compressor donated from a Toyota Camry, Condenser from Chevy Caprice, OEM Evaporator, custom-made A/C engine-bracket, custom-made “Alum air-distribution duct” & “Switch Panel with 3-speed fan” plus other parts).
My FEEBACK:
So far, the cooling is great and the A/C fan blows great deal of cooler-air compared to the OEM, the performance of which am pretty familiar with.
This setup is reliable as far as performance, operation & maintenance are the concern. More insulation-work is definitely required for A/C accumulator, the air-ducts, the floor-pans & engine’s firewall.
Hope the above provides some useful information & feedback to those having similar interest.
While on the Thread; am still looking for the feedback; primarily on Point-1; as am yet to decide and take action, pending hearing your views & sharing similar experiences; if any. Upon receiving which; I’ll risk-assess the situation & act accordingly.
This is update on the following works that I just completed (as advised earlier in my Post # 39), together with some photos, comments & feedback; as best I could've collected & observed:
1) Installation of Dual 13 In. Elect. Cooling Fans (2 speeds): The workshop advised these “hi-perf. Dual elect. Fans” are donated from Jaguar XJ Supercharged engine. We fixed them into a custom-made shroud. I estimate each of the dual-fans to be of 13 inch, and I guess they together pull a total air volume in the range of 4,000 to 4,500 CFM! You really feels the massive amount of air being pulled while the fans operate at the 2nd higher speed (manually switched), and I keep it at the 2nd most of the time.
My FEEBACK:
Great while idle & it reaches @ 195F+/-; especially with the A/C on. But while driving, I noted the “elect.temp guage” (fitted & located right on top of the water-pump) goes upward & points @ 215~220F (at night) & it remain there even after I stop!! In our summer day-time, the ambient-temp gets much higher than the night & I suspect that the engine-temp will climb further!
Important to note that currently; my engine has no Thermostat, and I recall that with the same setup with the previous OEM mechanical-fan of the 8.1, the temp was reading around 195~200F while driving (was a bit less at idle)!
With this “discouraging performance”; am seriously thinking to switch back to the OEM Fan (sound but performance), but with the addition of “extra elect. fan” either: AA) in front of the A/C Condenser, or BB) inside the shroud to pull some cooling-air while in traffic, to cool down the A/C.
The Workshop advised me to hold on this decision; pending one more try (on his cost); to replace this Jaguar’s setup with that of 2008 or 2009 Denali, as he expects the latter will outperform both (the Jaguar’s as well as the 8.1’s), but am yet to determine!
I remind that, the current Radiator is new from the dealer, OEM Big-Bore Alum-core, suitable for 1995 454 (7.4L) engine for gulf Spec’s (i.e. high-temp conditions).
2) Installation of “4 inch Cool-Air Intake”: This was locally fabricated in a “perf. workshop”, but am still thinking to contain it within a sealed box; having the ‘air-inlet’ to be sourced from the factory existing side-opening in the passenger-side fender.
My FEEBACK:
It functions better than the OEM noticeably. However, I view that there is a high-need to insulate the ‘air duct/pipe’ from the excessive-heat generated by the engine. I may warp it (using a “headers-pipe wrap” or “warping it with a size-fit sliced rubber hose then holder it with a tie-wrap”).
3) Installation of A/C: The workshop custom-made a setup/blend of locally available parts (the compressor donated from a Toyota Camry, Condenser from Chevy Caprice, OEM Evaporator, custom-made A/C engine-bracket, custom-made “Alum air-distribution duct” & “Switch Panel with 3-speed fan” plus other parts).
My FEEBACK:
So far, the cooling is great and the A/C fan blows great deal of cooler-air compared to the OEM, the performance of which am pretty familiar with.
This setup is reliable as far as performance, operation & maintenance are the concern. More insulation-work is definitely required for A/C accumulator, the air-ducts, the floor-pans & engine’s firewall.
Hope the above provides some useful information & feedback to those having similar interest.
While on the Thread; am still looking for the feedback; primarily on Point-1; as am yet to decide and take action, pending hearing your views & sharing similar experiences; if any. Upon receiving which; I’ll risk-assess the situation & act accordingly.
