Time for a new Carb(advice needed)

[Archangel]

Phayzer, you mean a metering block, you can't put a power valve in a metering plate. And how is it blocked off, do you have a solid plug in it or there's just no hole you could put a power valve in?

[Rojas109]

sounds to me that your uncle wants to suck more money out of your pocket. you probaly his only customer since he started his own garage.

[phayzer5]

Phayzer, you mean a metering block, you can't put a power valve in a metering plate. And how is it blocked off, do you have a solid plug in it or there's just no hole you could put a power valve in?

whatever the fuck you wanna call it

Its a powervalve with no valve, its blank, cast over center section, nothing can get through it

[Archangel]

Well there is a difference, with the plates you can't change jets and such, so probably not too good for high-performance application. But yeah, yer carb goes with what I was saying about new carbs and and primary valves only. Anyhow.

[turbo2256b]

Well there is a difference, with the plates you can't change jets and such, so probably not too good for high-performance application. But yeah, yer carb goes with what I was saying about new carbs and and primary valves only. Anyhow.

There are differant plates just like different jets. The numbers dont corespond to the jet sizes though there kina random so you need a Holley book to find the jet size. I have collected a few over the years. Have lots of jets though as used in metrering blocks. The work as well for performance as the jets do but are not as easy to change. In some situations such as my dual quad setup the metering blocks add too much length to the carb to fit on the manifold so the plates work.

[interceptor1985]

Aaaah Good ol Carb discusion....

[phayzer5]

http://www.pro-system.com/proseries4150.html

[torquelover]

http://www.pro-system.com/proseries4150.html

That's a lot of Mentos you got there!

Seriously Colin, in my life I get subtle hints, from my Guardian Angel, if you will. Do you think that the carb coming in wrong is a sign? AFAIK, this is also your DD/winter car. Maybe best to keep the old carb, with vacuum secondaries and electric choke, and spend the money on tuning and some dyno runs. If you send the carb back, might want to spend the money on a wideband O2 sensor and gauge setup so that you have an idea of what's going on. And I must bring this up again, since I don't think you ever answered it before: besides what your Uncle said about night/day differences, what is wrong with the old carb?

[Lincolnmania]

we dont have these efi conversations, cause they just work right

[Archangel]

we dont have these efi conversations, cause they just work right

Suuure, wanna tell that to my Townie next time she decides to idle at 2k after driving in high-humidity weather? Actually she probably won't do it no more cause I pulled the plug off the IAC, but if tis hooked up that's what happens, all the time every time - hell if I know what's up with it, but disconnecting and readjusting it carb-style is cheaper than fixing/replacing whatever's acting up. [/offtopic]

[Mr. Land Yacht]

mmm....Mentos sounds good.

[Mr. Land Yacht]

Dave, if you really think that a Vac. secondary carb like what I have is going to work better than the mechanical DP I got now...I will ship this one back and get the right one.
from what I understand...it seems like Mechanical DPs are meant mostly for Manual Trans and Vac. secondaries work better for Automatics.

but can we get a vac. secondary carb to open it's secondaries nearly as quick as a Mechanical DP?

if you know that a Vac. secondary carb can get me the numbers I need and work every bit as good as a Mech. secondary, I'll do it.

[turbo2256b]

we dont have these efi conversations, cause they just work right

I have seen somme realy hot FI discussions some led to carb installs some to very expensive fi mods some to simple stuff.

[1987cp]

but can we get a vac. secondary carb to open it's secondaries nearly as quick as a Mechanical DP?

if you know that a Vac. secondary carb can get me the numbers I need and work every bit as good as a Mech. secondary, I'll do it.

Not sure about being as quick to slam all four barrels open instantly, but do you really want that at 2,000 rpm (your converter stall speed)?

Here's a quick-change cap for the secondary springs (I'm assuming it fits your carb):

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HLY%2D20%2D59&N=700+115&autoview=sku

And I expect you'll need one of these spring kits:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HLY%2D20%2D13&N=700+115&autoview=sku

http://store.summitracing.com/partdetail.asp?autofilter=1&part=MOR%2D65425&N=700+115&autoview=sku

Keep in mind that I'm not a Holley guy, but I'm pretty sure that'll provide you with all the adjustment you need in terms of when the secondaries open. The procedure I remember reading in Car Craft was basically, floor the gas and make a run, and if you notice a bog when the secondaries open, change the spring. If the bog gets worse, you went the wrong way (i.e. one step heavier when you needed one step lighter). Holley guys check me on this, though.

[turbo2256b]

Dave, if you really think that a Vac. secondary carb like what I have is going to work better than the mechanical DP I got now...I will ship this one back and get the right one.
from what I understand...it seems like Mechanical DPs are meant mostly for Manual Trans and Vac. secondaries work better for Automatics.

but can we get a vac. secondary carb to open it's secondaries nearly as quick as a Mechanical DP?

if you know that a Vac. secondary carb can get me the numbers I need and work every bit as good as a Mech. secondary, I'll do it.

Yes a vacuum secondary cab can do as well as a mechanical. In cases like yours prob better. They work best in heavy cars with small engines were more low end torq is required. They work better in situations were economy is desired. They work better in top speed situation since a bigger vacuum secondary carb can be used and dialed in for low speed as well.