Forum: C4 ZR-1 General Postings
02-20-2011
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Replies: 30
Views: 4,528
Re: Stage 1 Porting
Has anyone done any before/after dyno tests from just porting the Plenum and Injector Housings ?
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Forum: C4 ZR-1 General Postings
02-20-2011
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Replies: 102
Views: 39,199
Re: Which battery do you have?
Here's some interesting information. I couldn't find my receipt for the WalMart "Maxx" battery I bought 6 months ago that died but I called up and asked if I could bring it back since it had a 03/10...
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Forum: C4 ZR-1 General Postings
02-18-2011
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Replies: 102
Views: 39,199
Re: Which battery do you have?
I'll give that one a try. I've never had a battery last 3 years on any Corvette I own(lack of use). I'll pick one up tomorrow and swap 'em out for free every couple years.
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Forum: C4 ZR-1 General Postings
02-18-2011
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Replies: 102
Views: 39,199
Re: Which battery do you have?
I've had horrible luck with batteries. My Z doesn't get driven much so the "sitting in the garage" does a number on batteries. It's common knowledge among anyone and everyone who has worked within...
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Forum: Past Events & Event Pictures
09-19-2009
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Replies: 7
Views: 1,870
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Forum: Past Events & Event Pictures
09-18-2009
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Replies: 7
Views: 1,870
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Forum: Past Events & Event Pictures
09-15-2009
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Replies: 7
Views: 1,870
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Forum: C4 ZR-1 Technical Postings
08-02-2009
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Replies: 34
Views: 7,433
Re: ZR-1 Ten Commandments
Thou shalt not spend a ton of money replacing injectors without ohming out the coils first :P
I keep seeing more threads with people continuing to recommend injector replacement and it turns out...
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Forum: C4 ZR-1 Technical Postings
08-02-2009
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Replies: 82
Views: 18,754
Re: Rough Idle/Hesitation/Backfire
Start on this page and keep reading:
http://zr1netregistry.com/forum/showthread.php?t=1777&page=16
Those Accell coils are garbage. They made my car run like complete crap, backfire, etc.
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Forum: C4 ZR-1 Technical Postings
07-04-2009
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Replies: 17
Views: 3,941
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Forum: C4 ZR-1 Technical Postings
06-30-2009
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Replies: 17
Views: 3,941
Re: Got it running -- hesitates when cold
Mine has a slight hesitation at first startup and goes away as the car warms up. I'm almost positive it's from pulling the plenum so damn many times over my 4 year ordeal that ended up being the...
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Forum: C4 ZR-1 General Postings
06-10-2009
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Replies: 12
Views: 3,435
Re: 1996 ZR1 ???
Yep, bingo!
It was showing up on the dealer sale tomorrow as a DOHC 5.7L V8. I did a VIN decoder on it and it also showed a DOHC 5.7L V8. I looked up a few LT4's and found similar VIN's..........
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Forum: C4 ZR-1 General Postings
06-10-2009
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Replies: 12
Views: 3,435
Re: 1996 ZR1 ???
Now that I think about this. I'll bet it's an LT4 and the VIN decoders are just pulling it up as and LT5. We'll see for sure tomorrow but I'll bet that's the story.
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Forum: C4 ZR-1 General Postings
06-10-2009
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Replies: 12
Views: 3,435
1996 ZR1 ???
Supposed to look at a 96 ZR1 tomorrow. VIN number actually even pulls up as a 96 DOHC 5.7L ZR1.
Is there such a thing ?
DECODED 1996 Chevrolet Corvette
Country UNITED STATES
Make ...
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Forum: C4 ZR-1 Technical Postings
05-24-2009
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Replies: 28
Views: 3,248
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Forum: C4 ZR-1 Technical Postings
04-17-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
Yes, I found out this guy up East is misrepresenting these coils as new. They are just take-offs from who knows what. I bought a set from him and promptly sent them back when I found out what he...
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Forum: C4 ZR-1 Technical Postings
04-03-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
Yes, Summit took them back. I'm using new GM plug wires, think they're 8mm. I think the problem with the Summit/Accel coils was the 2 connection slots. They were too lose, didn't squeeze the...
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Forum: C4 ZR-1 Technical Postings
03-24-2009
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Replies: 193
Views: 54,213
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Forum: C4 ZR-1 Technical Postings
03-22-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
I may have figured out the difference between the GM D545 vs the GM D555 coil. The D545 lists for 70 cents more than the D555. It looks like the D545 comes with a little rubber gasket a hair over...
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Forum: C4 ZR-1 Technical Postings
03-22-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
Very common. GM D555 or D545. I have no idea what the difference is between the 2 part numbers. It's the same coil as used on almost every GM V6. 3 coils on the V6, 4 on the ZR-1 V8.
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Forum: C4 ZR-1 Technical Postings
03-22-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
IT'S FIXED !!!!!!!!!!
Yes folks, my ZR-1 is running like a champ again. New GM D545 coils fixed the problem. The high rpm power is awesome. No cutting out, no miss, no falling on it's face.
...
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Forum: C4 ZR-1 Technical Postings
03-21-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
I bought a set of brand new GM ZR-1 D545 coils.
So.........More coils, more tests:
Summit/Accels :
Primary / Secondary
1. .7 ohms / 7.02 k-ohms
2. .6 ohms / 7.06 k-ohms
3. .6...
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Forum: C4 ZR-1 Technical Postings
03-18-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
Spades wouldn't even fit up in those tiny slots. I did however use some wires.
Testing of the original GM coils got me:
Primary / Secondary
1. .6 ohms / 5.63 k-ohms
2. .6 ohms /...
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Forum: C4 ZR-1 Technical Postings
03-17-2009
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Replies: 193
Views: 54,213
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Forum: C4 ZR-1 Technical Postings
03-17-2009
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Replies: 193
Views: 54,213
Re: 91 ZR-1 Cutting Out Under Load
I tried but couldn't get my volt meter terminals to fit up in the slots and get any kind of a reading. I might try sticking some wires up there tomorrow and read off the wires.
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