Forum: C4 ZR-1 Technical Postings
07-30-2024
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Replies: 2
Views: 1,103
Re: AC Clutch Replacement 1991
I have a clutch kit in the parts bin for a future replacement. It is GPD brand part number 4321248. I believe the description for this one was that is fits the 1990 ZR-1, but as far as I know, there...
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Forum: C4 ZR-1 Technical Postings
07-28-2024
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Replies: 3
Views: 1,308
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Forum: C4 ZR-1 Technical Postings
07-11-2024
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Replies: 4
Views: 3,326
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Forum: C4 ZR-1 Technical Postings
06-20-2024
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Replies: 5
Views: 3,286
Re: Stalling at quick stops
The MAP sensor line or perhaps the sensor itself? It is happening when you get on the brakes, which are assisted by vacuum and to me it sounds like a hiccup in the engine management when vacuum...
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Forum: C4 ZR-1 Technical Postings
06-18-2024
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Replies: 19
Views: 6,775
Re: Best sounding cams
I have been thinking about this lately as well. Although in most cases, I believe heads are ported along with the cams. I have everything opened up, but the heads. The idea of the changed idle with...
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Forum: C4 ZR-1 Technical Postings
06-18-2024
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Replies: 9
Views: 3,902
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Forum: C4 ZR-1 Technical Postings
06-14-2024
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Replies: 2
Views: 2,632
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Forum: C4 ZR-1 Technical Postings
06-01-2024
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Replies: 43
Views: 13,484
Re: Engine noise- stuck lifter?
Just armchair quarterbacking the issue, but the rev to 3K rpm seemingly resolving the issue, to me, indicates an oil pressure or quality issue. The result is a ticking lifter or lifters. Does the...
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Forum: C4 ZR-1 Technical Postings
05-27-2024
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Replies: 15
Views: 6,723
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Forum: C4 ZR-1 Technical Postings
05-15-2024
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Replies: 4
Views: 3,326
Swapping in a quicker ratio rack: who has done it?
Hey guys, I was curious who has done a quick steer conversion on these cars and how they like it. I have a fresh rack with 0 miles on it from Turn One that was rebuilt for an 85. While it was with...
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Forum: C4 ZR-1 Technical Postings
03-19-2024
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Replies: 30
Views: 7,456
Re: Headers
That?s a really good price on those. Years ago when I bought them they were 450. Then not long ago I only saw them over 600. Did the OBX business go belly up and they are liquidating?
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Forum: C4 ZR-1 Technical Postings
03-11-2024
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Replies: 15
Views: 5,358
Long read but some decent info
Alright, Team I got this finally resolved and she is back on the road. The fan shroud does rest against the end tanks of the DeWitts radiator. The spacers worked as intended when the upper shroud was...
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Forum: C4 ZR-1 Technical Postings
03-05-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Well, team I have resolved the heater hose fitting issue. A 1/2-14 NPT tap finished off the material left stuck on the threads. So that problem is out of the way. One more problem has cropped up now...
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Forum: C4 ZR-1 Technical Postings
02-28-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Thanks, Craig. Some patience and the use of a large EZ out, along with a 7/8 reamer bit has yielded some results. But not optimal, I do not advocate the method I used. I can now get about three full...
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Forum: C4 ZR-1 Technical Postings
02-28-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Well not great news on removing what was left of the heater hose fitting. It has pretty much fused with the threads of the housing itself. At this point, I am considering drilling out the material...
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Forum: C4 ZR-1 Technical Postings
02-26-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Hi, Craig! Oh yes, I already have the new and improved part on standby. Sure enough in Jerry?s description he mentions the factory nipple pot metal makeup and I just found that out. This stuff looks...
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Forum: C4 ZR-1 Technical Postings
02-26-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Alrighty, I am open for to some suggestions? Appropriately sized EZ out? This happened while trying to remove the plastic retainer from the heater hose. What is left of the aluminum gave up before...
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Forum: C4 ZR-1 Technical Postings
02-24-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Good to know and I also have a 200 amp alternator fitted, so the electrical demands should be covered. Do you recall the connector route you went with the spals? Figured I would ask before I start...
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Forum: C4 ZR-1 Technical Postings
02-23-2024
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Replies: 15
Views: 5,358
Re: Heater hose return fitting replacement
Well the assembly looks fairly sturdy so it should be able to remain in place. Does anyone recall how many amps the fan relays are rated for? I picked up some spal fans to replace the factory fans...
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Forum: C4 ZR-1 Technical Postings
02-21-2024
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Replies: 15
Views: 5,358
Heater hose return fitting replacement
Hello all,
For those who have replaced the heater hose return fitting on the remote thermostat housing, did you leave the housing assembly bolted in place during replacement?
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Forum: C4 ZR-1 Technical Postings
02-19-2024
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Replies: 13
Views: 5,778
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
01-28-2024
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Replies: 15
Views: 4,081
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Forum: C4 ZR-1 Technical Postings
12-28-2023
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Replies: 19
Views: 6,288
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Forum: C4 ZR-1 Technical Postings
12-27-2023
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Replies: 19
Views: 6,288
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Forum: C4 ZR-1 Technical Postings
12-22-2023
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Replies: 7
Views: 3,819
Re: Fuel leak somewhere
Good catch, Jerry. That?s right, the canister is also under the driver side headlight, just like the old L98 cars. No plenum dive needed for the 90 ZR guys.
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