Forum: C4 ZR-1 General Postings
5 Days Ago
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Replies: 183
Views: 59,056
Re: Best Sounding Exhaust for the ZR-1
I don?t recall exactly. Its either the 12288 or the 12198. Both are SS dual 2.5?outlet/3? center inlet. The 288 is 14in. length and the 198 is 18in. I believe I may have used the 288s.
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Forum: C4 ZR-1 Technical Postings
1 Week Ago
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Replies: 17
Views: 474
Re: Solution for B&B Exhaust Drone?
What Karl is describing is what was done w the C6Z. In order to reduce weight, Corvette went w an Xpipe rather than a resonator, and to duplicate the effect of the resonator, they adopted a muffler...
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Forum: C4 ZR-1 Technical Postings
1 Week Ago
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Replies: 17
Views: 474
Re: Solution for B&B Exhaust Drone?
Just a long term update. Last year the DynoMax muffs had pretty much become a boom chamber. We opened one up and the insulation was totally carbonized. This time I decided to go w MagnaFlow muff w...
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Forum: C4 ZR-1 Technical Postings
1 Week Ago
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Replies: 22
Views: 1,493
Re: Continuing angst... headers today...
I realized that my P/S motor mount was broken after I kept seeing that the D/S exhaust tips would always end up slightly crooked after a ride. And it was no matter how tight I would make the exhaust...
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Forum: C4 ZR-1 General Postings
2 Weeks Ago
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Replies: 183
Views: 59,056
Re: Best Sounding Exhaust for the ZR-1
I recently replaced my DynaMax Ultraflows w MagnaFlow mufflers. Both have the Z06 NPP valves installed on them similar to the B+B Fusion system. The Maggies produce a more mellow exhaust note at...
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 10
Views: 242
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 10
Views: 242
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 10
Views: 799
Re: Looking for BMCB Bin File
I think u could essentially disregard the BMCB and just load the BKKR. The diff between the FOA and FO is pretty insignificant at this point.
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Forum: C4 ZR-1 General Postings
4 Weeks Ago
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Replies: 26
Views: 1,175
Re: A question for the longtime owners.
Marty,
If I bought a C8 I know I would?t be wrenching on it. The ZR is one of the last generations that a ?shade tree? guy like me can play w and modify. That is certainly a big part of the fun.
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Forum: C4 ZR-1 General Postings
03-08-2024
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Replies: 26
Views: 1,175
Re: A question for the longtime owners.
This is my second ZR since 2007 having owned this one now since 2010. The chassis has 165k on the ODO but literally everything underneath and engine has about 55k or less on it. It pretty much has...
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Forum: C4 ZR-1 Technical Postings
02-26-2024
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Replies: 6
Views: 241
Re: Knock Sensor 1995 ZR1
U sure u bought the correct sensor? There?s a difference between ZR and regular C4. I forget the value, think its 3.2K ohms, but u can check resistance on sensor to make sure. Check w Jerry at...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
01-26-2024
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Replies: 15
Views: 1,300
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Forum: C4 ZR-1 Technical Postings
12-19-2023
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Replies: 19
Views: 3,349
Re: Best Place to Buy Injectors?
RC Engineering has an easy BSFC CALCULATOR to help determine injector flow required to support a desired CHP. The stock injector flow is good enough for ~ 540chp w an 80% headroom from static.
I...
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Forum: C4 ZR-1 Technical Postings
12-06-2023
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Replies: 13
Views: 4,339
Re: Stalling sometimes at stops?
Had that issue w mine a number of years ago. I have a 63mm TB so no dag. Throttle return springs get weak after 30 years and I gotnone of Marc?s helper springs. Throttle closes correctly ever since.
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Forum: C4 ZR-1 Technical Postings
12-05-2023
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Replies: 13
Views: 4,339
Re: Stalling sometimes at stop
Well I guess we can ask Marc next week. Closing the throttle plates causes the ECM to increase IAC steps in order to maintain commanded idle speed. This gives the ECM more ?headroom? to control idle...
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Forum: C4 ZR-1 Technical Postings
12-04-2023
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Replies: 13
Views: 4,339
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Forum: C6 ZR1 General Postings
11-26-2023
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Replies: 12
Views: 6,913
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Forum: C4 ZR-1 General Postings
11-22-2023
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Replies: 2
Views: 927
Re: Quick Jacks on Sale
I?ve had QJ 5000 for 4 years and love them. They make oil change, swapping O2 sensors, knock sensor, even working on top end much easier. With no room for a lift, these are the best alternative.
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Forum: C4 ZR-1 Technical Postings
11-16-2023
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Replies: 4
Views: 1,461
Re: 02 Sensors
AC Delco are the only ones I use. Possibly Denso. Bosch is prone to drop outs.
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 6
Views: 981
Re: Engine knock
How has the motor been modded if at all? If its stock and has the stock calibration, knock shouldn?t be much of an issue.
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Forum: C4 ZR-1 Technical Postings
10-07-2023
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Replies: 4
Views: 1,214
Re: ADS Super Chip Tune
Most of the pre-done ?tuner? calibrations done in the 90?s were not worth the $ IMO. Certainly, Marc H?s tuning brings years of experience w the LT5 and is a favorite on this forum. Tuning the LT5...
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Forum: C4 Members' Rides
09-28-2023
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Replies: 20
Views: 3,731
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Forum: C4 ZR-1 Technical Postings
09-22-2023
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Replies: 7
Views: 1,512
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Forum: C4 ZR-1 Technical Postings
09-08-2023
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Replies: 12
Views: 2,890
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Forum: C4 ZR-1 General Postings
08-09-2023
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Replies: 9
Views: 1,276
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