Messages

16

Maintenance / Re: ideal 4053 jetting for stock 302/30-30/manifolds

« on: August 19, 2018, 09:40:40 PM »

Hi bob,  yes i had been playing with that too.  I get it to rev clean, just very lazy.  Its just ho-hum on the way up from 2500 rpm to 7k.  I have 2-3 things to sort out tomorrow - and will do a compression test.  I think its more than my carb adjustment.

I noted that while the motor hasnt overheated,  it seems to continually get warmer with prolonged cruises at a constant rpm - and no pressure in the coolant system afger cool down - which is odd.  I have a feeling there might be a head gasket leak or something causing low
Compression somewhere - or a crack in the carb body that is making it go lean at constant rpm once t heats up.

I know stock 302s are very lazy unless you put headers on, but this thing is a dog at the moment.

Will report more when i get some results tomorrow

17

Maintenance / Re: ideal 4053 jetting for stock 302/30-30/manifolds

« on: August 19, 2018, 03:38:00 PM »

Guys, ive tried the 26/26 setting

Just more overlap, and less bottom end for an already wimpy 302

The 30/30 setting is not noisy by any means.

18

Maintenance / Re: ideal 4053 jetting for stock 302/30-30/manifolds

« on: August 18, 2018, 08:44:26 PM »

Im at sealevel. 

Will try staggering some

19

Maintenance / ideal 4053 jetting for stock 302/30-30/manifolds

« on: August 18, 2018, 08:05:42 PM »

getting my stock DZ302 back on the road this week -  and have a few questions.

i'm getting a high rpm break up - but i think i know where/what that is - as for the carb...
i know 68-72 was stock jetting - but i also know that is WAY lean.

the motor is true 11:1, installed a NOS 3849346 cam with factory - 0-stamped rockers. - lash is set and checked at 30/30 -
ignition is 38wot, with initial around 18 -  car fires up beautifully, and I have no issues with idle at 950.
its got 70-76, with a 6.5 and 8.5 and a yellow spring - and its pretty doggy - even for a gutless 302 with manifolds lol.

one thing that seems odd - idle mixtures are only 1/4 to 1/2 turn from bottomed out with about 10"Hg at idle... so i'm slightly concerned about the mixmatch of new/old Holley parts.

the carb is an old 4053 with original metering blocks, on newer 4053 baseplate -   i still have the rest of the repop 4053 which might get put back together tonight if I can't sort this original out.

something just doesn't seem right about the way it runs - its rather sluggish to get off the line, seems ok mid-range wise - but never really pulls hard.

Years ago, I borrowed a buddy's o2 -A/F tailpipe rig and I got the best readings with 72-76 with the stock manifolds... does that sound right to you tinkerers?

Thanks

20

Decoding/Numbers / date code for 09D 1111480 dist

« on: August 09, 2018, 03:40:11 PM »

need to find a correct dated distributor for a late 69 Z (09D)

may is as late as i've found for the stamps - anyone know of or have a later batch date for a 480?

i'd rather not buy a restamp, but until i can find an original - it might be my only option

21

General Discussion / Re: repop headers for 67-9 Z28

« on: February 04, 2017, 12:45:39 AM »

Thanks!

22

General Discussion / Re: repop headers for 67-9 Z28

« on: February 04, 2017, 12:15:58 AM »

yes I"m aware of this - but they were available as an over the counter option in 69 for the Z28
thanks

23

General Discussion / repop headers for 67-9 Z28

« on: February 03, 2017, 09:54:44 PM »

Anyone know of a reasonable source for these Kustom or Bill Stewart Headers?

HBC has em for about 2k   that seems ridiculous  -

I seem to recall someone saying Larry Christiansen was having them done - but i don't know how to get ahold of him or what the price was.

Thanks

24

Originality / Re: 69 Z28 Exhaust

« on: August 27, 2016, 07:33:47 PM »

too bad gardner doesn't make an Empty resonator shell - just so it looks correct but doesn't cork the exhaust down even more

25

Originality / Re: 69 Z28 Exhaust

« on: August 27, 2016, 07:24:35 PM »

nevermind - this moron doesn't know ow to use the search function

26

Originality / Re: 69 Z28 Exhaust

« on: August 27, 2016, 07:23:31 PM »

Bryan, just did a search  and it comes up with nothing

27

Originality / 69 Z28 Exhaust

« on: August 27, 2016, 06:30:04 PM »

According to Gardner and late Z (09D) would have the resonators and transverse muffler.
Waldron exhaust claims that Z28s did not get the resonators. 
I've seen a magazine image of a ZL1 test car with resonators and transverse muffler so i don't think "hi-perf" cars were "resonator exempt"

can anyone answer with certainty?

Thanks

Aaron

28

General Discussion / tire/wheel combo question

« on: May 03, 2016, 12:12:33 PM »

Looking to put larger OE style rubber on my 69 z

Kelsey TIre makes a G60x15 in Polyglass GT -  anyone know if/how well these fit with stock rally wheels and suspenion?

2nd -  the other option would be to put a set of MiniLites on... anyone know where I could get a set?  15x7 or 15x8

Thanks

29

Decoding/Numbers / Re: location of 12bolt axle stamps

« on: February 06, 2016, 12:01:42 AM »

I'm specifically looking for a 12bolt Camaro housing with 3.73, 4.10, or 4.56
last week of august, or 1st week of sept.

thanks

30

Decoding/Numbers / location of 12bolt axle stamps

« on: February 04, 2016, 01:32:46 PM »

quick question -  i've seen 3-4 Camaro/Nova 12bolts in my day and the stamps always seemed to be on the pass side tube facing forward.... (at least that is my memory at the moment)

were the axle stamps ALWAYS in the same place? I suspect because its probably more accessible when the transverse muffler is hanging in place - - or was it stamped prior to assembly, and just the way it was - or is just odds that the ones I've looked at all are in the same place?