Paxton

toffe_old · May 11, 2010 at 5:23 PM

Hi,

I have read a couple of the Paxton posts in this forum and it looks like this is the way I want go to get some more power out of my engine.

Where can I buy a classic Paxton?

Are there any modifications I need to do to the engine? It’s a standard Hipo engine with arvinode exhaust.

Edited by - toffe on 05/11/2010 17:26:52

zray · May 11, 2010 at 6:31 PM

there are several ebay sellers that sell vintage Paxtons. But the only source I would recommend is Craig Conley of Paradise Wheels in CA.

conleyr107@sbcglobal.net

He bought all the tooling & parts for the ball drive Paxton's from the Paxton Company. They only sells the gear drive style now.

I think he is charging $3000 for the complete GT-350 type Paxton kit. That doesn't include a carb. I would advise buying a carb from him, as it will be correctly set up.

I am currently running a vintage Paxton in my GT-350. The motor has stock Hi-Po cam & high compression pistons. It all works fine, the only adjustment necessary was to change the total timing from 40 degrees to 33 degrees. You have to do a little expermenting with the timing to avoid detonation.

I love the Paxton, and in my case, it was a necessity, as I had lost some acceleration with my 3.00:1 rear end gearing.

I'd be happy to offer any advice, on or off the forum.

Z. Ray

Edited by - zrayrichter on 05/11/2010 18:32:25

63Kcode_old · May 12, 2010 at 11:58 AM

I agree with buying one fro Craig, with the carb. That is what I did on my 66 and I love it!!!!!!!!!

Larry

6hypo5conv_old · May 12, 2010 at 5:55 PM

Did any K code Mustangs-(Non-Shelbys) come with Paxtons? may be dealer installed?

mcfly_old · May 12, 2010 at 6:55 PM

I have also been toying with this idea.

Even though my kar did not come with one they are period correct and I believe acceptable.

What kind of HP gains are we talking about ?

-mike-

s2ms · May 13, 2010 at 11:01 AM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

Did any K code Mustangs-(Non-Shelbys) come with Paxtons? may be dealer installed?

There was a bronze 66 fastback (HiPo I think) I saw for many years at the Mustang Roundup in Bellevue, WA that had a Paxton and 66 GT350 quarter windows. I haven't seen the car there for at least 5 years but IIRC the owner had original dealer documentation for the installation. Unfortunately I didn't take any pictures so this is entirely anecdotal but I remember being very impressed with the car. Hopefully it shows up again.

Dave

zray · May 14, 2010 at 12:03 AM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

I have also been toying with this idea.

Even though my kar did not come with one they are period correct and I believe acceptable.

What kind of HP gains are we talking about ?

-mike-

I am going to get around to the dyno one of these days as I'd like to know as well.

However, my goal is to mothball the original engine & install a 331 w/ AFR heads & the vintage Paxton. That might be fun.

Z

oscart_old · May 14, 2010 at 8:39 AM

Why settle for just one?

http://cgi.ebay.com/ebaymotors/PAX…=item3a44151d16

toffe_old · May 18, 2010 at 2:19 PM

Just talked to Craig and he had the vintage Paxtons at the price mentioned here.

He also recommended me a Holley 650 DP to further improve the performance.

Can anyone give me an advice wherever I should buy the 650 or do the required mods to the original carb?

zray · May 18, 2010 at 7:03 PM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

Just talked to Craig and he had the vintage Paxtons at the price mentioned here.

He also recommended me a Holley 650 DP to further improve the performance.

Can anyone give me an advice wherever I should buy the 650 or do the required mods to the original carb?

it saves a lot of grief to buy a carb from C. Conley already tested and ready to go. Another thing, if you have an original carb, it's worth over a grand as is. If you modify it to work well with a Paxton, just for starters that will require you to mill off the choke tower & there goes all the date codes, etc & the value will plummet to that of 10 lb door stop.

Carbs with choke towers intact will fit under the Paxton enclosure, but they don't work nearly as well as a no-tower carb.

I've tried it both ways, and am now using a Holley 650 DP that has no choke tower.

http://www.summitracing.com/parts/HLY-0-82651/

It works fine, I also am using a (self-modified) marine spark arrester which serves as a air diffuser. It makes a big difference, and let me take out a lot of jetting & it improved responsiveness.

http://www.cpperformance.com/p-14175-5-34-x…r-aluminum.aspx

Z. Ray

k code 65_old · May 19, 2010 at 4:29 AM

Z Ray , are you running the HiPo Fuel Pump still , was wondering if the HiPo Pump ( Rebuilt ) would be sufficient too run with the 650 dble pumper, i too am thinking of Buying a Paxton Package from Craig , craig did tell me you can run with the Std HiPo carb , didnt however mention anything about Choke Clearance Problems.

Is that Link too The spark Arrestor correct , i couldnt open it up

Some pics of the Paxton Set Up would be real nice too view .

Thanks , Shane

toffe_old · May 19, 2010 at 9:53 AM

Z Ray, did you buy your carb from Craig?

From the quote I got from him it seems a bit pricy compared to summit.

If you have any pictures of your setup that would be great.

Either by mail or in this forum.

zray · May 19, 2010 at 2:38 PM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

Z Ray , are you running the HiPo Fuel Pump still , was wondering if the HiPo Pump ( Rebuilt ) would be sufficient too run with the 650 dble pumper, i too am thinking of Buying a Paxton Package from Craig , craig did tell me you can run with the Std HiPo carb , didnt however mention anything about Choke Clearance Problems.

Is that Link too The spark Arrestor correct , i couldnt open it up

Some pics of the Paxton Set Up would be real nice too view .

Thanks , Shane

I'm using a Carter fuel pump that C. Conley modified so it is "boost referenced", which is just pressing or threading a brass tube into the vent orifice so it can be connected by hose to Paxton outlet.

If you have a legit Hi-Po fuel pump I wouldn't use it even if the capacity was sufficient. Any drilling or tapping into it is bound to diminish it's value.

The choke towers clear OK, but carbs with them don't have as good of air flow as carbs not having the choke towers.

Try this link: http://www.cpperformance.com/c-479-flame-ar….aspx?pagenum=1

the one I used is half way down the page: 5-3/4" x 1-5/8" Tall Flame Arrestor, Aluminum

I'll take some photos today and post them.

Z.

zray · May 19, 2010 at 2:48 PM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

Z Ray, did you buy your carb from Craig?

From the quote I got from him it seems a bit pricy compared to summit.

If you have any pictures of your setup that would be great.

Either by mail or in this forum.

I didn't get the carb from C. Conley, I bought a refurbished carb from Holley. They sell them on ebay. They are warranty returned carbs that are basically new. The price is usually a $100 dollars under Summit's price for a new one. I can't remember if it came with the Nitrophyl floats, or if I had to change them. But anyway, you can save a few dollars if you don't mind tearing into your carb to modify it for the Paxton application, and having to work on the jetting for a while. A cab from C. Conley will save you some time and aggrevation, that;s all.

Will post somephotos soon.

Z.

zray · May 19, 2010 at 10:06 PM

Photos:

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as you can see I removed most of the wire mesh from the spark arrestor as I wasn't getting sufficient airflow, leaving only one layer. Without the arrestor I was having intermittent flooding problems & erratic performance ( a/f ratios were erratic).

I can't really say how this was caused, all I know is a guy over on the SAAC forum swore by the use of a diffuser, and Paxton is recommending one be use with their new kits for carbed engines

From a reseller's ad: "...... Miscellaneous Components: 8M011-001: Air diffuser. 5.75" diameter x 2.5" tall. Mounts on top of 4150 carburetor when installed in Vortech carburetor enclosure. This diffuser stabilizes the airflow entering the carburetor in "blow-through" applications which allows for smoother operation and improved idle when supercharged ....." and from Paxton's web site ".. if the Holley carburetor is used, an air diffuser (#8M011-001) is recommended.."

I don't know how my diffuser compares to the one Holly/Vortech sells.

Z.

Edited by - zrayrichter on 05/20/2010 08:26:07

toffe_old · May 20, 2010 at 9:06 AM

Thanks for the pictures Z Ray.

What extra instruments do you have?

EGT and Fuelpressure?

What brand are they?

Where are you routing the hose that comes from the valve covers?

zray · May 20, 2010 at 10:11 AM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

Z Ray, did you buy your carb from Craig?

From the quote I got from him it seems a bit pricy compared to summit.

If you have any pictures of your setup that would be great.

Either by mail or in this forum.

I didn't get the carb from C. Conley, I bought a refurbished carb from Holley. They sell them on ebay. They are warranty returned carbs that are basically new. The price is usually a $100 dollars under Summit's price for a new one. I can't remember if it came with the Nitrophyl floats, or if I had to change them. But anyway, you can save a few dollars if you don't mind tearing into your carb to modify it for the Paxton application, and having to work on the jetting for a while. A carb from C. Conley will save you some time and aggrevation, that;s all.

Will post somephotos soon.

Z.

here is one of those ebay auctions for the carb. They usually apear every week or so, so bidding is low or none:

http://cgi.ebay.com/ebaymotors/ws/…ASS%3AUS%3A1123

Z.

Edited by - zrayrichter on 07/19/2010 21:23:55

zray · May 20, 2010 at 12:58 PM

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>

Thanks for the pictures Z Ray.

What extra instruments do you have?

EGT and Fuelpressure?

What brand are they?

Where are you routing the hose that comes from the valve covers?

from left to right (at idle): Boost Pressure (none w/o a load), Fuel Pressure, A/F ratio, engine vacuum, oil pressure. first two gauges are vintage Paxton gauges, a/f gauge is AEM I think, last two are Auto Meter.

the gizmo in the pcv plumbing is a device for catching & filtering out the breather oil before it gets sucked into the intake.

http://conceptualpolymer.com/new_page_1.htm

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Z.

Edited by - zrayrichter on 05/20/2010 14:46:42