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Search: Posts Made By: Paul Workman
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Forum: C4 ZR-1 Discussion
12-12-2022, 04:23 PM
Replies: 20
Views: 1,167
Posted By Paul Workman

The vacuum pump periodically cycling is not...

The vacuum pump periodically cycling is not usually a concern, if it recycles every half minute or so. But, recycling does indicate some leakage in the system. But, as long as the pump stops, enough...
Forum: C4 General Discussion
11-16-2022, 04:23 PM
Replies: 17
Views: 1,241
Posted By Paul Workman

I've had good luck with the slaves fm Rock Auto -...

I've had good luck with the slaves fm Rock Auto - cast iron version. I opted for the '93+ verson (for my 90 ZR-1) as the bleeder is on the bottom side. Coupled with a Russel 639630 check valve...
Forum: C4 ZR-1 Discussion
10-24-2022, 01:31 PM
Replies: 27
Views: 1,400
Posted By Paul Workman

I realize I'm late to the party, but thought I'd...

I realize I'm late to the party, but thought I'd share a trick to lettering the plenum and cam covers, FWIW:D.

Of course you apply the paint with an artists brush, but you don't have to sweat...
Forum: C4 ZR-1 Discussion
10-23-2022, 05:00 PM
Replies: 5
Views: 752
Posted By Paul Workman

I would suggest Jerry's Gaskets. Ask him for the...

I would suggest Jerry's Gaskets. Ask him for the kit including gaskets. Jerry will be sure to get you the correct injectors for the '90 ZR-1s (vary some by year).
Forum: C4 General Discussion
09-15-2022, 01:33 PM
Replies: 3
Views: 182
Posted By Paul Workman

I agree with Slo Jo. I had the same problem on...

I agree with Slo Jo. I had the same problem on my 95 Vette - ended up having the AC compressor/system purged and re-charged. Problem solved!
Forum: C4 ZR-1 Discussion
08-30-2022, 12:14 PM
Replies: 12
Views: 2,907
Posted By Paul Workman

IIRC (as a founding member of the "FBI"), Marc...

IIRC (as a founding member of the "FBI"), Marc Haibeck did the only (FBI) monoblock liner(s), but for a single car - a 441 cid conversion. However, Pete Polatsidis has done several closed deck...
Forum: C4 ZR-1 Discussion
06-29-2022, 07:44 PM
Replies: 5
Views: 782
Posted By Paul Workman

I wrote a paper for the HOTB magazine, a decade...

I wrote a paper for the HOTB magazine, a decade ago detailing two of the most common DNS (does not start) issues, specifically in the 90-92 MYs.

The problem that seems to be the most prevalent in...
Forum: C4 ZR-1 Discussion
05-27-2022, 01:55 PM
Replies: 28
Views: 2,685
Posted By Paul Workman

Well, you could send it off to have the injectors...

Well, you could send it off to have the injectors replaced, but doing the injectors yourself is a "RIGHT OF PASSAGE" kind of thing. You will become familiar with several of the systems hidden under...
Forum: C4 ZR-1 Discussion
05-24-2022, 02:49 PM
Replies: 38
Views: 3,100
Posted By Paul Workman

Good point on the "coking" of the valves, etc. on...

Good point on the "coking" of the valves, etc. on the secondary valves. I've been running w/o the secondary valves/hardware for about 10 years now w/ no problems/no coking. :thumbs:
Forum: C4 General Discussion
05-24-2022, 02:34 PM
Replies: 7
Views: 870
Posted By Paul Workman

While in the car, the 14.6 charging voltage is...

While in the car, the 14.6 charging voltage is typical when cold under hood and with minimal load. When hot under the hood, charging voltage typically drops to 13.8, down from ~ 14.6.

Far as...
Forum: C4 General Discussion
05-15-2022, 04:23 PM
Replies: 8
Views: 1,745
Posted By Paul Workman

Equally important is battery maintenance,...

Equally important is battery maintenance, especially in summer weather. I have been using the series 75 (lead-acid) batteries since 2007 in the 600 CCA range. And, with the use of a Battery Tender,...
Forum: C4 ZR-1 Discussion
05-13-2022, 03:21 PM
Replies: 6
Views: 488
Posted By Paul Workman

:iagree: with afot. If the secondaries are truly...

:iagree: with afot. If the secondaries are truly deleted, there is no need for the vacuum pump as the secondaries are either pinned open OR removed entirely. No vacuum actuator (or their pump) are...
Forum: C4 ZR-1 Discussion
05-13-2022, 02:53 PM
Replies: 10
Views: 1,067
Posted By Paul Workman

In the first place, the LT5 ain't no L98.That is...

In the first place, the LT5 ain't no L98.That is not "high mileage" for an LT5 that has been properly maintained up to then. The thing is, the ZDDP levels recommended @ the time of the LT5's intro...
Forum: C4 ZR-1 Discussion
05-13-2022, 02:10 PM
Replies: 28
Views: 2,685
Posted By Paul Workman

Yup! A group of us shared in the replacement of a...

Yup! A group of us shared in the replacement of a couple bad injectors at the Gathering, as the car sat on the drive outside the front door of the Holiday Inn! Ironically, Dan said he had a new set @...
Forum: C4 General Discussion
04-24-2022, 02:31 PM
Replies: 73
Views: 5,490
Posted By Paul Workman

'73. Bought my first C4 in '02. Traded for my...

'73. Bought my first C4 in '02. Traded for my current ZR-1 in '07... and she still can scare the sh*t outta me! :rofl:

...
Forum: C4 General Discussion
04-24-2022, 02:20 PM
Replies: 14
Views: 834
Posted By Paul Workman

Corvette dismanteler

I've had good luck over the years on our 2 C4s for sundry parts (hood, knobs, bumper, seats, etc.) with Jason at Vette2Vette (https://www.vette2vette.com/). Corvette Rubber (as mentioned) gets my...
Forum: C4 General Discussion
04-13-2022, 02:40 PM
Replies: 9
Views: 801
Posted By Paul Workman

:iagree: with what is said. However, if you...

:iagree: with what is said. However, if you intend to go "topless' regularly, one solution to frame flex w/ the top off is a set of the frame stiffening flex bars, ICO Vette2Vette...
Forum: C4 General Discussion
04-08-2022, 06:13 PM
Replies: 4
Views: 466
Posted By Paul Workman

Without flow test data, it would be impossible to...

Without flow test data, it would be impossible to determine exactly what effect that foil may have. However, take a look at the intake of a few jet engines, next time you're at an airport. In a...
Forum: C4 ZR-1 Discussion
03-24-2022, 01:29 PM
Replies: 18
Views: 1,960
Posted By Paul Workman

Yeah.:iagree: Who knows. But, it doesn't sound...

Yeah.:iagree: Who knows. But, it doesn't sound serious, I guess is the point. It would need to be taken out to get a chance to stretch its legs and take some curves and run through the gears!. ...
Forum: C4 General Discussion
03-24-2022, 01:04 PM
Replies: 10
Views: 720
Posted By Paul Workman

:iagree:Yes. I can vouch for that!! Most of the...

:iagree:Yes. I can vouch for that!! Most of the popular summer walking/running/sport shoes these dayz have flared soles which exaggerate the foot contact area. They are near useless for...
Forum: C4 General Discussion
03-24-2022, 12:54 PM
Replies: 38
Views: 1,934
Posted By Paul Workman

Well, head gaskets are quite a rare event on the...

Well, head gaskets are quite a rare event on the LT5 UNLESS you stray away from the old GREEN silicon base antifreeze. Marc Haibeck would have some data on that aspect. The only time the heads on...
Forum: C4 General Discussion
03-22-2022, 02:25 PM
Replies: 38
Views: 1,934
Posted By Paul Workman

Well...when it comes to head gaskets, it could be...

Well...when it comes to head gaskets, it could be MUCH worse...if it were on a ZR-1. (For those not knowing) to replace a head gasket on the LT5 requires the engine be pulled, the timing chain/cams...
Forum: C4 General Discussion
03-22-2022, 02:06 PM
Replies: 17
Views: 1,137
Posted By Paul Workman

Dittos on the parking brake operation. When/if...

Dittos on the parking brake operation. When/if you have to have emissions checked, it is surprising how many idiots (at the testing facilities) can't figure out how to release the brake and leave it...
Forum: C4 ZR-1 Discussion
03-10-2022, 02:34 PM
Replies: 18
Views: 1,960
Posted By Paul Workman

Engine sounds pretty normal. The squeak my be...

Engine sounds pretty normal. The squeak my be just the belt or the idler pulley. The idle varies a little, but my 90 ZR-1 does that too on cold days until it is warmed up.
The thing to do is get it...
Forum: C4 General Discussion
03-10-2022, 02:07 PM
Replies: 4
Views: 431
Posted By Paul Workman

I got mine from MidAmerica Motorworks (MAM). The...

I got mine from MidAmerica Motorworks (MAM). The kit came with speaker covers that matched the rest of the carpet, which was good.

However, the edges of the carpet were not all sewn correctly - a...
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