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Posts Made By:
JLMounce
Forum:
67-69 Firebird TECH
03-27-2024, 06:00 PM
Replies:
10
'67 Firebird 400 Bottoming Out
Views:
250
Posted By
JLMounce
Funny I know, but I've seen it. Cars bottoming...
Funny I know, but I've seen it. Cars bottoming out or vehicle performance isn't what the owner thinks it should be. Meanwhile there's 600 lbs between the husband and wife sitting in the car.
...
Forum:
Pontiac - Street
03-27-2024, 04:34 PM
Replies:
31
67 Firebird Fuel system Upgrade
Views:
699
Posted By
JLMounce
One thing that I think gets over-looked in the...
One thing that I think gets over-looked in the equation is traction. I don't think that most of us posting here are running it out to 120-130mph on the highway and we're probably not running at the...
Forum:
67-69 Firebird TECH
03-27-2024, 03:25 PM
Replies:
10
'67 Firebird 400 Bottoming Out
Views:
250
Posted By
JLMounce
Front coils aren't terrible in these cars, I'd...
Front coils aren't terrible in these cars, I'd much rather replace them than the leaf springs.
Based on your summary I don't necessarily see anything that is really out of whack. Do you have...
Forum:
Suspension TECH
03-26-2024, 05:28 PM
Replies:
2
Global West COF-781 kit
Views:
83
Posted By
JLMounce
Because this kit makes wholesale changes to how...
Because this kit makes wholesale changes to how the upper control arm mounts in the car, you should follow Global West's recommendations for alignment specs. They should be listed with the...
Forum:
Pontiac - Street
03-26-2024, 01:21 PM
Replies:
4
rear sway bar bushing question
Views:
143
Posted By
JLMounce
I would use the 13/16" bushings. You may...
I would use the 13/16" bushings. You may consider adding a bit more grease to help take up the small amount of tolerance that has built up over the years.
Forum:
EFI Tech
03-26-2024, 12:16 PM
Replies:
4
EFI on '67 GTO 400ci
Views:
101
Posted By
JLMounce
Don Johnston at DCI swears by the Go Pro 4 system...
Don Johnston at DCI swears by the Go Pro 4 system and uses it in many of his builds.
The ECU is a nice piece and the system uses quality OE grade harness connectors etc. Considering you get an...
Forum:
67-69 Firebird TECH
03-26-2024, 10:48 AM
Replies:
10
'67 Firebird 400 Bottoming Out
Views:
250
Posted By
JLMounce
Can you give us an idea where you think it's...
Can you give us an idea where you think it's bottoming out? In the rear, or in the front?
If you haven't yet, you can adjust the koni's stiffer, which may help.
Especially in the rear, the...
Forum:
Suspension TECH
03-26-2024, 09:31 AM
Replies:
7
Opinion on wheel color
Views:
129
Posted By
JLMounce
I generally like a color matched wheel hoop to...
I generally like a color matched wheel hoop to the body color, but white doesn't seem to work for me.
I personally love a dark or even black wheel on a white car.
Forum:
Pontiac - Street
03-26-2024, 09:29 AM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
I can read vacuum through the FiTech handheld. ...
I can read vacuum through the FiTech handheld. That reading hasn't changed. I typically see about 14.5" when the engine is warm. I do have a mechanical vacuum gauge that I can test that against as...
Forum:
Pontiac - Street
03-25-2024, 10:13 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Yes, I've verified all injectors are functioning....
Yes, I've verified all injectors are functioning. No injector fault codes either.
Forum:
Pontiac - Street
03-25-2024, 05:39 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Had some time this afternoon to at least plug in...
Had some time this afternoon to at least plug in the laptop.
The long term learn values for WOT are all very close to what the VE table is commanding. They are ranging from -5% at 5500rpm to +7%...
Forum:
Pontiac - Street
03-25-2024, 02:41 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
I don't believe I should need to really get in to...
I don't believe I should need to really get in to any RPM to determine if I have a fuel pressure issue. A quick tip-in and free rev should tell me if there's something going on with fuel delivery. ...
Forum:
Pontiac - Street
03-25-2024, 11:59 AM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Yup, I'm pulling the plugs this week to inspect...
Yup, I'm pulling the plugs this week to inspect as well.
The system uses a Summit Racing billet distributor which is a copy of the MSD Pro Billet. It wouldn't surprise me if they were exactly the...
Forum:
Pontiac - Street
03-25-2024, 11:50 AM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Yes, that's why I'm getting a gauge on it. I...
Yes, that's why I'm getting a gauge on it. I also need to run a datalog, but I'm a bit fearful of doing so incase something more major is occurring. I did notice last week that the system was...
Forum:
Pontiac - Street
03-25-2024, 10:49 AM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
I have a fuel pressure gauge and AN to NPT...
I have a fuel pressure gauge and AN to NPT adapter that I'm going to plumb into the throttle body. I'll be able to see what the fuel pressure is doing and that will be a big tell to the whole...
Forum:
Pontiac - Street
03-25-2024, 10:01 AM
Replies:
31
67 Firebird Fuel system Upgrade
Views:
699
Posted By
JLMounce
A -6 line in higher pressure EFI situations will...
A -6 line in higher pressure EFI situations will support over 600 hp. -6 line should still be enough when using a carburetor for most people, but at the lower pressures you work with, the flow...
Forum:
Pontiac - Street
03-24-2024, 03:28 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
It’s in the back of my head. I have the older...
It’s in the back of my head. I have the older Lunati lifters prior to the updates Morel did in 2021. I inspected them last in 2021.
This is certainly possible. These components are a decade...
Forum:
Pontiac - Street
03-24-2024, 02:14 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Anything is possible, the system is 10 years old....
Anything is possible, the system is 10 years old.
Fuel delivery is a tanks inc fuel tank with their GPA 4 (walbro 255) in-tank pump. -8 supply and return lines.
Forum:
Pontiac - Street
03-24-2024, 01:30 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
How long do valve springs typically last? ...
How long do valve springs typically last? Obviously this isn't anywhere near an OEM spec cam, so I wouldn't believe that I could get 100K out of them. But what kind of life expectancy should I be...
Forum:
Pontiac - Street
03-24-2024, 01:13 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Fuel in the tank is 2 weeks old. I'm going to...
Fuel in the tank is 2 weeks old. I'm going to check that the adjustable rotor has not moved when I check the timing system in general.
I do want to reiterate, this engine has functioned without...
Forum:
Pontiac - Street
03-24-2024, 01:00 PM
Replies:
31
67 Firebird Fuel system Upgrade
Views:
699
Posted By
JLMounce
That may be due to different type of regulators...
That may be due to different type of regulators being used. If you're regulating something without a return line, you're dialing down fuel delivery to the carburetor. With a return system common...
Forum:
Pontiac - Street
03-24-2024, 12:47 PM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Timing was recently checked late last year after...
Timing was recently checked late last year after I replaced the harmonic balancer. It's computer controlled with a locked out distributor. It uses an adjustable rotor that was also locked down and...
Forum:
Pontiac - Street
03-24-2024, 11:37 AM
Replies:
31
67 Firebird Fuel system Upgrade
Views:
699
Posted By
JLMounce
Theoretically, having the regulator near the tank...
Theoretically, having the regulator near the tank vs the carb should not matter. Fluid pressure in a line increases simultaneously across the entire length of the line or tube. I will say having...
Forum:
Pontiac - Street
03-24-2024, 11:26 AM
Replies:
32
Diagnosing Loss in Performance and WOT Backfires
Views:
825
Posted By
JLMounce
Diagnosing Loss in Performance and WOT Backfires
For a couple of weeks now I've been noticing that the engine in my 69 bird has not been running the same. I wouldn't say it was running poorly, just not the same.
The idle quality has become...
Forum:
Pontiac - Street
03-22-2024, 04:44 PM
Replies:
31
67 Firebird Fuel system Upgrade
Views:
699
Posted By
JLMounce
Agreed with OCM and Formula that the way to do...
Agreed with OCM and Formula that the way to do this right and once is to go with the Tanks Inc setup.
The first gen F-body tank is a nice piece that looks factory. Don't skim on the fuel sending...
Showing results 1 to 25 of 500
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