Holley whine/whistle

[Timothy B.]

Re: Holley whine/whistle

Brad,

In addition to what others have suggested, there is a post in the archives that describes a method using a small piece of plate glass with sandpaper to plain the surfaces of the main body (sides and bottom) and throttle body.

Working on the throttle body will require removing the throttle blades and throttle shafts so you will probably need a dremmel tool to gently grind off the peened bottom of the throttle blade screws first before removing them. It's sometimes a necessary step as the screws are brass and can snap off causing hours of work drilling so not to damage the threads.

Once you get these internal leaks sealed up the Holley will perform great.

[Bradley D.]

Re: Holley whine/whistle

Brad -

Photo below shows the stampings on the front side of the choke air horn on a 3810 - yours should look the same, except the date code on the bottom line will be different.


[ATTACH=CONFIG]41577[/ATTACH]

Great, thanks. A picture is worth,.....
Found it and it is a 3810, do you know how do decode the date out of that string of digits.

[Bradley D.]

Re: Holley whine/whistle

Brad,

In addition to what others have suggested, there is a post in the archives that describes a method using a small piece of plate glass with sandpaper to plain the surfaces of the main body (sides and bottom) and throttle body.

Working on the throttle body will require removing the throttle blades and throttle shafts so you will probably need a dremmel tool to gently grind off the peened bottom of the throttle blade screws first before removing them. It's sometimes a necessary step as the screws are brass and can snap off causing hours of work drilling so not to damage the threads.

Once you get these internal leaks sealed up the Holley will perform great.

Thanks for your input. Not sure I want to tackle the 'dremel' stuff though.

[Clem Z.]

Re: Holley whine/whistle

here you go.http://www.junkyardgenius.com/holley/datecode.html

[Terry M.]

Re: Holley whine/whistle

Great, thanks. A picture is worth,.....
Found it and it is a 3810, do you know how do decode the date out of that string of digits.

Brad,

Many of us know, and the answer is in the TIM&JG (Technical Information Manual & Judging Guide) for your car available from the NCRS store. Click the button at the top of the page. In the mean time.

First digit is the last digit of the year of assembly. 6=1966, 7=1967 and so on.

Second character is the month of the year:
1= January
2=February
3= March
4= April
5= May
6= June
7 = July
8= August
9= September
0= October and here is where they get cleaver
A= November
B= December

The last number is the week of the month.

If you fins a Holley with four numbers in the date location it was made after 1972, when Holley was no longer an OEM producer for Chevrolet.

[Terry M.]

Re: Holley whine/whistle

here you go.http://www.junkyardgenius.com/holley/datecode.html

I wish I could have found that site first. Would have saved me a lot of keyboarding.

[Clem Z.]

Re: Holley whine/whistle

I wish I could have found that site first. Would have saved me a lot of keyboarding.

it keeps your fingers nimble.

[Terry M.]

Re: Holley whine/whistle

it keeps your fingers nimble.

That is about all that is nimble now days. But I probably shouldn't go there or this thread will designate to the level of Dr Mike's thread.

[Bradley D.]

Re: Holley whine/whistle

Brad,

Many of us know, and the answer is in the TIM&JG (Technical Information Manual & Judging Guide) for your car available from the NCRS store. Click the button at the top of the page. In the mean time.

First digit is the last digit of the year of assembly. 6=1966, 7=1967 and so on.

Second character is the month of the year:
1= January
2=February
3= March
4= April
5= May
6= June
7 = July
8= August
9= September
0= October and here is where they get cleaver
A= November
B= December

The last number is the week of the month.

If you fins a Holley with four numbers in the date location it was made after 1972, when Holley was no longer an OEM producer for Chevrolet.

Thanks, I have a post '72 (2676)