04-20-2017 | #1 |
Join Date: Oct 2016
Location: Atlanta GA
Posts: 51
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91 ZR1 Aqua Metallic
The prior owner bypassed the 2 upper front plenum coolant hoses on each side and took a longer hose and wrapped it around and under the air opening of the plenum. He said it helped cooling.
To go back to the original setup, is it possible to just reconnect two shorter hoses on the plenum where the exposed 2 "fitment" openings are? Not sure if I said that correctly but any help is appreciated. Thanks |
04-20-2017 | #2 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: 91 ZR1 Aqua Metallic
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Reverting it back is simply reinstalling the hoses from the right and left IH to the respective ports on the TB. Resons for bypassing the TB in the first place is -to avoid heating induction air to optimize intake air density (horsepower!) -reduce the temperature of the plenum...which serves as the heat sink for the precious DIS module; by FAR the best reason of all (in my mind, anyway!) The reason for reverting back to stock- -to protect against TB freeze-up in near or sub-freezing driving -to score higher in NCRS judging events. For the reason of reducing the DIS module HEAT is really worth considering before reverting the bypass. Just sayin!
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 04-20-2017 at 09:24 PM. |
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04-20-2017 | #3 |
Join Date: Jul 2016
Location: Greater St. Louis
Posts: 487
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Re: 91 ZR1 Aqua Metallic
Paul covered the bases very well. Just wanted to add one more possible consideration for leaving the TB bypassed is to conserve the finish on the throttle body, which is supposed to be adversely affected by the stock setup.
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04-21-2017 | #4 |
Join Date: Oct 2016
Location: Atlanta GA
Posts: 51
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Re: 91 ZR1 Aqua Metallic
Thanks Paul W and Con2. Put it back to the original setup and all is well! Have a great weekend
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04-23-2017 | #5 | |
Join Date: Oct 2016
Location: Atlanta GA
Posts: 51
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Re: 91 ZR1 Aqua Metallic
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04-23-2017 | #6 |
Join Date: Apr 2004
Location: ATL. GA.
Posts: 2,170
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Re: 91 ZR1 Aqua Metallic
Another good reason to by-pass is to eliminate the corrosion that occurs to the top of the throttle body around the plate on top. Your oil leak could be front oil pan bolts, oil cooler hoses or one of the oil sending units on housing the oil cooler hoses connect to.
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Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold |
04-23-2017 | #7 |
Join Date: Oct 2016
Location: Atlanta GA
Posts: 51
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Re: 91 ZR1 Aqua Metallic
Thanks We Gone, after I park the car the puddle of oil, which just started two days ago without even a drip, ends up with about a 1' x 3" puddle. A substantial amount only after a short drive. Which gets me to think it may be more than just tightening bolts or a bad gasket. Possibly more substantial like you were thinking, an oil cooler hose or oil sending unit. Thanks for your help
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