2V holley w/adapter efficiency.

[havoline]

I get pretty good mileage on my car. I drive conservatily and it pays off: getting 24 on the highway and if I drive nice and easy I get 18 in the city and easy 16 mpg if I dont care. Just have autolite 1v and nothing else has happened yet. But if I bolted on headers first what would happen to my mileage? And after that what if I added on the 2V holley with the adapter?? Prefer to go with 350 cfm.

But before doing any of that I am gonna install pertronix ignitor to replace my points because well they have been in the car for 8 years. What can I expect after doing that???? Dont worry I already have 8mm wires and 40000v coil installed and the coil fixed the misfiring from the overheating of the previous coil and the wires cleaned up alot of noise I heard from my radio.

 

[page62]

The Holley is good for peformance, but I sincerely doubt it's good for fuel economy. The Holley/Weber 5200 would be a better choice for economy. That's because it's a "progressive" carb: the two barrels open in sequence. On the other hand, the 2300 barrels open simultaneously.

Another change you should consider (and will NEED to do) is swapping out your distributor. I'm betting you have a Load-o-matic dizzy in there, which only works with carbs that have an SCV (primarily the Autolite 1100). The 2300 or 5200 will NOT work with that distributor. Your best bet is a DSII swap. You'll need to check and see if you have a 1/4" or 5/16" oil shaft. If it's 1/4", do a search here on the forum about what you can do to swap to 5/16".

 

[havoline]

why do I need to switch my distributors? And I just did new wires for my car too. But still what kind of numbers would I expect to get for any of the carburator choices based on the info I stated for miles per gallon because if it only goes down to less than what even a V8 can get I will just forget it.

 

[250mav]

i put a HW 5200 on my mav and it really didnt make my MPGs drop off any, if im easy on it. once i get into the throttle with some agression it does eat more gas.

if economy is such a concern why are you worried about all these performance upgrades?

i only swapped up to a bigger carb because i was willing to sacrifice

 

[havoline]

Its nice to have your cake and eat it do dont you think?? Thats one of the main reasons I still keep my 6 because well do you see the gas pumps going down? Its nice to tell that to people who criticize you for like hey swap out the 6 and get a 302, and I keep saying that isnt gonna help me at the pumps what do you get?? They always say low numbers and I dont want to be one of them. I used to have low mileage on my car when I first got it and I dont want to go back. I was lucky that my mileage was down back in 2000-2002 just before the prices when up towards infinity. They were 11 city/17 highway. Now 18/24.

Again why do I need to upgrade to a DSII? Is a DUI better application? I know it would cost more but still.

 

[bigcatchdaniel555]

Many people and myself included didnt really see a dip in fuel economy with the 2bbl 350cfm maybe 2 mpg but nothing to override the performance gain and driveability. To determine if you need a new dizzy look into your old one if se can see springs you have the load-o matic dizzy if no springs are visible your are fine. The reason you want to get rid of the load o matic is it only works with your autolite 1100 with a scv. This gives a different vac signal than any other car so the car will run like crap if you use any carb. Figure this you will spend about 65 bucks on pertronix but that will be no where as good as DSII which is the fully electronic ignition found on circa 1978 ford 200 i6. A lot of people including me have done this upgrade and it is light years better than pertronix offering better power and driveability and fuel economy increase. If you use this system just get the electronic control box like 20 bucks and the dizzy about 50 its all plug and play then buy the cap for a 1976 car and you can use your existing wire and coil. This by far the easiest bang for the buck upgrade their is.
Danny

 

[havoline]

and where can I get all of these items at because I really prefer not to go to a junk yard to get things???

How are performances different compared from a DSII and DUI?? again I know the cost difference but still.

 

[page62]

In fact, I have a Duraspark dizzy available cheap. You can use the early Duraspark distributor caps (74-76) with your wires. Do the HEI module setup (cheap!) and you're on your way. Did I mention cheap! Less than a Pertronix for everything...

 

[Bort62]

To clarify what Bigcatch said;

The stock distributor you have requires a specifically metered vacuum signal from the spark control valve on your carb.

neither of the carbs you are looking at will have this capability, and as such, are incompatible with the load-o-matic distributor. (or vice versa) Installing a pertronix unit does not change this fact.

If economy is high on your goals list, switching to a DSII is a good idea anyway, regardless of carb choice.

 

[havoline]

I my think about it but will wanna wait til I generate funds again maybe after a few more pay checks and maybe after I get my GI bill back in action. Remember just paid for all new suspension replacement/upgrade as well as aluminum radiator so wanna get my attention on that and if that all works out then I will put more serious consideration towards your invitation to buy the DSII setup.

After the suspension and radiator the ignition I want to improve and after that the header and after that maybe the carb. I want to improve mileage as high as I can and if what you are saying is true doing the ignition upgrade will make that go up alot too because I still have my points and the the resistor keeping my 40000v coil at bay. Just abit nervous messing with the distributor because I have not really even changed the timing myself and last time it was changed was 6 years ago. I have checked it before and its still 12btc. right were it was left last time.

 

[Bort62]

If the timing hasnt been changed in 6 years, the points are probably trash...

 

[page62]

Don't put something off because you don't feel confident about it! In some ways, leaving a set of points in there (not to mention the crappy original distributor itself) negates all the other "big $$$" things you're doing.

Also I would put headers way down the list -- they're vastly overrated and can reduce low-end torque. Until you get everything else in front of the headers flowing freely and working right, they're not going to make much of a difference. In fact, if you're gonna do headers you may want to consider grinding down the manifold for a direct 2-barrel mount instead of using an adaptor. EVERYTHING is affected by that tiny little carb mounting hole in your intake!

 

[CZLN6]

Howdy Havoline and All:

Havoline- I'm curious, you're getting great gas mileage now. Are you interested in improving your mileage? or performance? or both? Properly tuned, and driven the same, your mileage will not change much going to a Holley. If you're looking to maximize mileage, consider a 5200.

Either the 2300 or 5200 will require at least an upgrade to a '68 or later, Non-load-O-Matic distributor. Again your stock carb and distributor are married. Upgrading to a DuraSpark, DuraSpark II or a DUI ignition electronic (No Points to wear out and degrade performance) will improve idle and all-around driveability. Save your money on the Ignitor and upgrade to a later distributor.

If you're sticking with your stock carb and distributor the Petronix Ignitor is a great upgrade.

Hope that helps.

Adios, David

 

[havoline]

I suppose I understand. I liked the dyno runs seeing that DUI has stronger improvement over DSII. I might consider it in the near future, just skeptical and nervous on touching the distributor because I never really did. Along time ago I considered getting the holley 5200 but just lost my direction while doing other things. Will the adaptor that classic inlines work for this carburator or do I need to use the strokebolt or who ever that company is that makes those, dont wanna use cliffords.

 

[CZLN6]

Howdy Back:

I think Classic Inline carries both the wide base (2300 Holley and 2100 Autolite) and small base (Holley/Weber 5200) adapters. Tom Langdon at Stovebolt is a good source for a good, reasonably priced, rebuilt 5200. His adapter is a generic design, created for Chevy sixes, but adaptable to our uses. I would not close the door on Clifford. Their's is a good design and may have some advantages over the others.

We Ford Six guys have few resources for aftermarket parts. I'm anxious to keep them all healthy and in business- but, I'd check with ClassicInline first.

Adios, David

 

[CobraSix]

The DSII can be done with all new parts for about $60 total from an autoparts store.

Just ask for a Distributor, cap and wires for a 79 Granada with a 250 I6. Then ask for the HEI module.
http://www.fordsix.com/tech/engine/dura ... aspark.php

It will work with a 40kV coil.

Really easy to do. I've done both Pertronix and DS2 and DS2 was by far easier to set up. All you have to do afterwards is reset the distributer to TDC on #1 piston. Otherwise it's easy as cake. Maybe 1-2 hours of work, max.

Performance wise, They are about the same, but DS2 has the advantage that parts are available from just about any auto parts store and no waiting around for something when a part fails on Pertronix. (been there, done that).

http://www.kastang.us/pertvds2.html


As far as answering your question about lost efficiency, I doubt you'd notice much difference. I qualify that statement with this.

I was running a warmed over 200 (260H cam) with a 1V carb and got about 28 MPG on the highway at 65 MPH

I replaced the head with an Aussie 250/2V modified for a 4V Holley with long tube headers. Now I"m running a 390 CFM Holley 4V with vacuum secondaries. If I'm not throttle happy I can get 25 MPG at 70 MPH. I'msure if I cruised at 65 again i could pick up 1 MPG.

So I only lost 10-15% and I did a major head upgrade.

I do have a few other fuel savers added, such as T5 transmission, DS2 with an MSD installed. BTW, I had all that installed when I was using the 1V carb and log head set up as well, so the only thing that changed was the head, intake, carb, and exhaust.

Slade