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Forum: C4 ZR-1 Technical Postings 10-25-2023
Replies: 12
Views: 3,310
Posted By Neat
Re: Limits of stock LT5 with boost?

Does a closed deck LT5 exist?
Forum: C4 ZR-1 Technical Postings 10-23-2023
Replies: 12
Views: 2,414
Posted By Neat
Re: Mediocre A/C

I didn't read the entire thread, apologies if I'm regurgitating something that's been said already:

I've noticed the AC on mine works great at first, but the blower motor slowly loses oomph over...
Forum: C4 ZR-1 Technical Postings 10-23-2023
Replies: 12
Views: 3,310
Posted By Neat
Re: Limits of stock LT5 with boost?

Is that an issue with ethanol based fuels; IE pump E85?


I've tuned a couple hundred turbo charged V8 applications on my dyno and have never been able to push an ethanol based fuel into knock...
Forum: C4 ZR-1 Technical Postings 09-07-2023
Replies: 12
Views: 3,310
Posted By Neat
Re: Limits of stock LT5 with boost?

I appreciate it guys, thanks! If the head gaskets were resolved, anyone have an idea of what the next failure might be?

I'd like to talk to Grahm if possible, is he a member here? I met him...
Forum: C4 ZR-1 Technical Postings 09-06-2023
Replies: 12
Views: 3,310
Posted By Neat
Limits of stock LT5 with boost?

Is there a known failure mode when pushing a stock LT5 engine?

In a turbocharged application, if you kept turning up the boost / power until something broke, what do you think would fail?

What...
Forum: C4 ZR-1 General Postings 11-21-2022
Replies: 8
Views: 1,012
Posted By Neat
Re: 4 days, 900 miles, two drag strips, and no issues

It ran 8.20 - 8.50 at 90-92 MPH depending on what sort of mood it was in. 1/8 mile tracks.
Forum: C4 ZR-1 General Postings 11-20-2022
Replies: 8
Views: 1,012
Posted By Neat
4 days, 900 miles, two drag strips, and no issues

Took my 91 on a 900 mile drive last weekend. Did a drag and drive event; finished 4th in the stick shift class (out of 5 cars, lol).

The car was flawless. I?m still amazed at the reliability,...
Forum: C4 ZR-1 General Postings 08-12-2021
Replies: 8
Views: 600
Posted By Neat
Re: All members can use my Dynojet 224xLC chassis dyno - near Raleigh, NC

Absolutely. You can hold the engine at 2000 RPM and work the accelerator pedal from light pressure to heavy pressure. That?ll let you hit all the KPA cells in the 2000 RPM column. Then move onto...
Forum: C4 ZR-1 General Postings 08-12-2021
Replies: 8
Views: 600
Posted By Neat
Re: All members can use my Dynojet 224xLC chassis dyno - near Raleigh, NC

Bring em on! 30+ corvettes would be amazing!
Forum: C4 ZR-1 General Postings 08-11-2021
Replies: 8
Views: 600
Posted By Neat
Re: All members can use my Dynojet 224xLC chassis dyno - near Raleigh, NC

No sweat gang. It's a fun thing to dink around with, lol.
Forum: C4 ZR-1 General Postings 08-11-2021
Replies: 8
Views: 600
Posted By Neat
All members can use my Dynojet 224xLC chassis dyno - near Raleigh, NC

I recently bought a Dynojet 224XLC in ground chassis dyno and installed it in my garage at home. It's not a business thing for me, just something for my friends and I to use / goof around on. ...
Forum: C4 ZR-1 Technical Postings 08-11-2021
Replies: 3
Views: 480
Posted By Neat
All members can use my Dynojet 224xLC chassis dyno - near Raleigh, NC

I recently bought a Dynojet 224XLC in ground chassis dyno and installed it in my garage at home. It's not a business thing for me, just something for my friends and I to use / goof around on. In...
Forum: C4 ZR-1 General Postings 08-11-2021
Replies: 112
Views: 11,488
Posted By Neat
Re: Dyno Sheet Petition

I?m interested in a skunkworks style recovery mission of the data. Someone shoot me a message if clandestine skulduggery becomes an option.
Forum: C4 ZR-1 Technical Postings 06-15-2020
Replies: 38
Views: 4,453
Posted By Neat
Re: Return of a Tuning Tale. Chasing classic knock

The lean condition you are seeing may be cylinder misfire. I'm not sure about the narrowband O2 sensors, but I have seen the wideband on my car show lean when a cylinder drops out.

It was...
Forum: C4 ZR-1 Technical Postings 06-15-2020
Replies: 38
Views: 4,453
Posted By Neat
Re: Return of a Tuning Tale. Chasing classic knock

I'll cover him for a year, who do I PayPal?
Forum: C4 ZR-1 Technical Postings 06-14-2020
Replies: 38
Views: 4,453
Posted By Neat
Re: Return of a Tuning Tale. Chasing classic knock

I know it's late, but cutting off the threaded portion of the spark plug would help you read them. You can chuck the porcelain in a drill, turn the drill on, and lay a hacksaw at the base of the...
Forum: C4 ZR-1 Technical Postings 06-14-2020
Replies: 20
Views: 2,134
Posted By Neat
Re: Rear main puking oil?

Around those years, the rear covers on LS engines had a casting porosity issue, the oil would ocassionally wick through the aluminum rear cover. I have only encountered the issue on 2010 and 2011...
Forum: C4 ZR-1 Technical Postings 06-14-2020
Replies: 6
Views: 1,235
Posted By Neat
Re: Clutch fluid a little low

For your third gear issues, this is from Bill at zfdoc.com:

Q) On my car I can power shift 2nd and 4th, but I'm having problems with 3rd. During normal driving going to 3rd does not feel as smooth...
Forum: C4 ZR-1 Technical Postings 06-14-2020
Replies: 6
Views: 1,235
Posted By Neat
Re: Clutch fluid a little low

Depending on the style of rubber gasket beneath your clutch fluid reservoir cap, that level may be alright. One style of rubber seal has a large cup that sits down into the reservoir; if that's what...
Forum: C4 ZR-1 Technical Postings 06-08-2019
Replies: 7
Views: 1,860
Posted By Neat
Re: Freon capacity for 91 ZR-1?

My FSM is tucked away in the attic with the other top to the car. I need to just go get the ladder and bring the FSM down - it doesn't do any good to anyone up in the rafters.
Forum: C4 ZR-1 Technical Postings 06-08-2019
Replies: 7
Views: 1,860
Posted By Neat
Freon capacity for 91 ZR-1?

I've been all over the web, and for whatever reason I can't seem to get an answer as to how much refrigerant (R12) my 91 ZR-1 will hold. I've checked the various stickers under the hood, none of...
Forum: C4 ZR-1 General Postings 04-06-2019
Replies: 31
Views: 2,237
Posted By Neat
Re: C4 Gathering Registration

Registered. See you guys there!
Forum: C4 ZR-1 General Postings 09-06-2018
Replies: 14
Views: 1,390
Posted By Neat
Re: Took my 91 ZR-1 to the dyno today

It is a DRM 475 car. However, it's missing the headers that normally come with that package. I'm not sure how much power is being left on the table by continuing to use the stock exhaust manifolds....
Forum: C4 ZR-1 General Postings 09-05-2018
Replies: 14
Views: 1,390
Posted By Neat
Re: Took my 91 ZR-1 to the dyno today

I’ll do that, thanks Mike!
Forum: C4 ZR-1 General Postings 09-04-2018
Replies: 14
Views: 1,390
Posted By Neat
Re: Took my 91 ZR-1 to the dyno today

I’ve read the Haibeck articles on porting, it was something I have always intended to do... For whatever reason though, your comments have moved that particular project a little closer to the top...
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