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Search: Posts Made By: larrywalk
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Forum: C1 & C2 Corvettes
01-05-2024, 12:43 PM
Replies: 8
Views: 413
Posted By larrywalk

The thermal reading on #1 of 120* cooler than the...

The thermal reading on #1 of 120* cooler than the others is cause for concern. I'd do a leak-down check. If that's good, do an intake valve lift check at the tip of the pushrod with the rocker...
Forum: C1 & C2 Corvettes
11-12-2023, 07:33 PM
Replies: 12
Views: 3,219
Posted By larrywalk

It looks like Silver Pearl - a 1965-1967 Corvette...

It looks like Silver Pearl - a 1965-1967 Corvette color.
Forum: C1 & C2 Corvettes
09-17-2023, 01:51 PM
Replies: 59
Views: 2,993
Posted By larrywalk

Hey Sam, would you size the primary idle air...

Hey Sam, would you size the primary idle air bleed holes and also the primary high-speed air bleed holes? Curious minds await the results - Cheers!
Forum: C1 & C2 Corvettes
09-15-2023, 02:37 PM
Replies: 59
Views: 2,993
Posted By larrywalk

Sam, to answer your question... No, I can not...

Sam, to answer your question... No, I can not think of any reason a faulty opening of the vacuum secondaries would make your AFR deviate from its normal schedule unless you had a bad secondary power...
Forum: C1 & C2 Corvettes
09-14-2023, 08:55 PM
Replies: 59
Views: 2,993
Posted By larrywalk

Out of curiosity, I calculated the area of your...

Out of curiosity, I calculated the area of your idle IFR (assuming it is the same size as my Holley 750 DP) and subtracted the cross-sectional area of your .021" wire. Here's how they compare:
Your...
Forum: C1 & C2 Corvettes
09-14-2023, 03:20 PM
Replies: 59
Views: 2,993
Posted By larrywalk

I intentionally did not mention the wire size for...

I intentionally did not mention the wire size for the IFR because its size can vary a lot from model to model. In the case of my old Holley 3310-1 780 vac sec, its IFR size was smaller than that of...
Forum: C1 & C2 Corvettes
09-14-2023, 11:56 AM
Replies: 59
Views: 2,993
Posted By larrywalk

Looking at your post #16, a PVCR restriction is...

Looking at your post #16, a PVCR restriction is warranted.
Forum: C1 & C2 Corvettes
09-14-2023, 11:54 AM
Replies: 59
Views: 2,993
Posted By larrywalk

WHOA!... Let's look at what is really happening....

WHOA!... Let's look at what is really happening. At cruise, especially with high numeric gearing and the light loads on the engine, the intake manifold vacuum will be very high and the throttle...
Forum: Drag Racing
09-14-2023, 08:38 AM
Replies: 12
Views: 990
Posted By larrywalk

Way to go! However removing the spare may be...

Way to go! However removing the spare may be detrimental as it will reduce weight on the rear wheels.
Forum: C1 & C2 Corvettes
04-14-2023, 05:00 PM
Replies: 130
Views: 8,915
Posted By larrywalk

https://cimg8.ibsrv.net/gimg/www.corvetteforum.com...

https://cimg8.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x1370/bkd10_08_24_026a_6fa9ac1096706b98221e93108da7bf8a2c4533ac.jpg
Here's my favorite of my '65 practicing for the NCCC record drags...
Forum: Drag Racing
03-21-2023, 09:01 PM
Replies: 9
Views: 2,345
Posted By larrywalk

This is a great calculator using your 1/4 mile...

This is a great calculator using your 1/4 mile (or 1/8 mile) timeslip to get your 0 - 60 mph time......
Forum: C1 & C2 Corvettes
12-22-2022, 09:49 PM
Replies: 49
Views: 4,434
Posted By larrywalk

Old memories! Not to forget Hib Halvorsen and...

Old memories! Not to forget Hib Halvorsen and the Beacon of Reality Award!
Forum: Drag Racing
09-25-2022, 08:15 PM
Replies: 6
Views: 538
Posted By larrywalk

Dang! There were some flashes of brilliance on...

Dang! There were some flashes of brilliance on your slips - like a .001 RT and running dead-on to your dial! But it sure hurts to lose after killing the tree with a .001 light! Looking forward to...
Forum: Drag Racing
09-25-2022, 07:31 PM
Replies: 6
Views: 538
Posted By larrywalk

What was your car number? Can view your times on...

What was your car number? Can view your times on the Slips app.
Forum: C3 Tech/Performance
09-25-2022, 07:14 PM
Replies: 25
Views: 847
Posted By larrywalk

Looks like a piston or plug in the trans valve...

Looks like a piston or plug in the trans valve body may have fallen out. Many are retained by a steel pin holding which holds it in the VB. Best to get a good description of all the passages in the...
Forum: C3 Tech/Performance
08-22-2022, 09:04 PM
Replies: 41
Views: 6,271
Posted By larrywalk

I can't agree with this recommendation... I too...

I can't agree with this recommendation... I too am using a Summit 1 1/2" diameter fuel pressure gauge just under the hood overhang and out of the driver compartment. Originally I had problems with...
Forum: C3 Tech/Performance
08-22-2022, 08:55 PM
Replies: 2
Views: 281
Posted By larrywalk

I had problems with my liquid-filled fuel...

I had problems with my liquid-filled fuel pressure on a corvette drag race car. Although I typically set the fuel pressure to 7 psi on a cold engine for my Holley carburetor, at the track I found...
Forum: C7 Tech/Performance
04-02-2022, 01:00 PM
Replies: 10
Views: 531
Posted By larrywalk

Jegs, Summit Racing, Discount Tire Direct, etc.

Jegs, Summit Racing, Discount Tire Direct, etc.
Forum: C1 & C2 Corvettes
03-15-2022, 10:31 PM
Replies: 4
Views: 725
Posted By larrywalk

It's the adapter for the early canister-type oil...

It's the adapter for the early canister-type oil filter.
Forum: C4 Tech/Performance
02-24-2022, 12:25 PM
Replies: 90
Views: 5,754
Posted By larrywalk

Cool picture! Back to the original question......

Cool picture!
Back to the original question... To control wheelies with a far forward IC, more front shock extension damping and more weight will help, but moving the IC back to under the CG (-46")...
Forum: C1 & C2 Corvettes
02-23-2022, 05:32 PM
Replies: 21
Views: 1,283
Posted By larrywalk

Check my hardtop hoist - Post #15:...

Check my hardtop hoist - Post #15: https://www.corvetteforum.com/forums/c1-and-c2-corvettes/4393452-best-auxiliary-hardtop-storage-method.html
Forum: C4 Tech/Performance
02-23-2022, 03:44 PM
Replies: 90
Views: 5,754
Posted By larrywalk

Sorry, I don't know the height of your center of...

Sorry, I don't know the height of your center of gravity which is needed to draw an anti-squat line, but I think you are close to 100%. However, comparing our cars, your IC is about 20" forward of...
Forum: C4 Tech/Performance
02-22-2022, 08:39 PM
Replies: 90
Views: 5,754
Posted By larrywalk

Here's the data I used after subtracting out the...

Here's the data I used after subtracting out the raised height:
Lower forward: (17.39, 9)
Upper forward: (12.75, 17.25)
Lower aft: (1, 8)
Upper aft: (1, 18.39)
This makes an instant center at...
Forum: C4 Tech/Performance
02-22-2022, 04:56 PM
Replies: 90
Views: 5,754
Posted By larrywalk

To compute your IC, I also need to know the...

To compute your IC, I also need to know the horizontal distances of all 4 of the 4-link attachment holes that you're using forward of the rear axle centerline. As you have indicated, the two forward...
Forum: C4 Tech/Performance
02-21-2022, 05:30 PM
Replies: 90
Views: 5,754
Posted By larrywalk

Your 4-link pictures appear to show your 4-link...

Your 4-link pictures appear to show your 4-link with no load on the suspension. What is your IC with full car weight on the wheels? I suspect your IC is too short and too low. (Please use inches...
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