Looking for 20+ More HP - Page 5 - Vintage Mustang Forums
 29Likes
Reply
 
Thread Tools
post #61 of 91 (permalink) Old 05-10-2019, 09:29 PM
Senior Member
 
MrFlash's Avatar
 
Join Date: Apr 2018
Location: JAX
Posts: 572
I think 20 hp can be gained just by tuning.
Start with the carb.
I know it seems too big but maybe the secondaries can be adjusted to open later. Finding the optimal fuel air ratio will help. So a good AFR gauge will be a big help.
Get the distributor tuned.
Try different carb spacers.
Try a set of 1.7 rocker arms.

You can also try changing the camshaft timing with an adjustable timing set. I think it would respond well to being a few degrees retarded. But might also hurt the overall peak rpm.

I don’t think the cam is a horrible choice. Very similar profile to what I’m using although mine has more duration and lift on the exhaust side. Which is generally preferred for a SBF.
The OP could try only getting 1.7 rockers for the exhaust only. This would also increase the duration and lift of the exhaust valves.
BlakeTX likes this.

1970 Mustang coupe
MrFlash is offline  
Sponsored Links
Advertisement
 
post #62 of 91 (permalink) Old 05-10-2019, 10:44 PM
Dimples
 
BlakeTX's Avatar
 
Join Date: Sep 2016
Location: Fort Worth, TX
Posts: 3,080
Garage
Quote:
Originally Posted by MrFlash View Post
I think 20 hp can be gained just by tuning.
Agreed. Cam discussion aside, I think this is the key to satisfaction for the original poster.

The anvil of reality.
BlakeTX is online now  
post #63 of 91 (permalink) Old 05-10-2019, 11:25 PM Thread Starter
Member
 
John_in_SC's Avatar
 
Join Date: Apr 2019
Location: Upstate
Posts: 54
Hey VMF -

Getting the bung installed and an AFR meter. Getting it on the calendar for next week. Before spending anymore excess funds - going to see what is going on w/AFR. Seems like a logical to me and then a tune.

I decided to use the google machine and ask it how to build a 300+HP 302. Many recipes for this build. Looking at some them - it appears I've checked off several boxes.but I'm def CARB heavy. Will try and make it work (hate to loose the spend). Suppose I can roll back to my EDEL 600. Sitting in box in my garage.

And I'm checking out manufacturer websites for CAM/Lifter kits just in case.

### Quick Edit ###

Looking at Edelbrock page (since my top end is EDEL) and their CAM spec sheets and performance tests - I think I'm off of my CAM selection. My COMP specs don't match up to their "recommend" specs to achieve certain performance levels.

Also shot off an inquiry to COMP giving them my build specs.

----------------------------------------------------------------
John in SC
Formerly Studiopet_2005
1966 Coupe - 302 with some stuff on it

Last edited by John_in_SC; 05-10-2019 at 11:40 PM.
John_in_SC is offline  
 
post #64 of 91 (permalink) Old 05-10-2019, 11:46 PM
Dimples
 
BlakeTX's Avatar
 
Join Date: Sep 2016
Location: Fort Worth, TX
Posts: 3,080
Garage
Quote:
Originally Posted by John_in_SC View Post
Suppose I can roll back to my EDEL 600. Sitting in box in my garage.
May I interest you in a nice 41XX series Holley carburetor (that was never broken so why have so many worked so hard to fix it)?

The anvil of reality.
BlakeTX is online now  
post #65 of 91 (permalink) Old 05-11-2019, 09:35 AM Thread Starter
Member
 
John_in_SC's Avatar
 
Join Date: Apr 2019
Location: Upstate
Posts: 54
Doing some contingency planning here..

If I must go the Carb route, I spent a few minutes pulling Carb inventory from my garage. I have on hand

EDEL 1405 (600CFM) - This just came off my car. Never was pleased with it. Probably because it was tuned properly.

Holley 1850-3 (600CFM). This was on my car in 2003 when I bought it. Came off in 2004 and has been sitting in a box.

Or I can step down to the QF650 and sell the 750. Wonder what the market is for the 750.

Thanks
J

----------------------------------------------------------------
John in SC
Formerly Studiopet_2005
1966 Coupe - 302 with some stuff on it
John_in_SC is offline  
post #66 of 91 (permalink) Old 05-11-2019, 09:53 AM
Senior Member
 
j persons's Avatar
 
Join Date: Aug 2010
Location: Natchitoches, LA. at the edge of the swamp
Posts: 3,770
The 1850 is a good basic carb, or it used to be. They've been around a long time, I bought one in 1968 to go on a '67 289 and it was great right out of the box. Holley may have cheapened them a little since I bought mine. I used a Holley 650 DP on a 331 with a Vic jr and it worked well after leaning it out a little during dyno tuning.

John

The Fauxstang. Dynacorn 67 fastback. Dart SHP 363, Close ratio Magnum 6 speed, 3.70 Eaton Truetrac in a fabricated full floater 9", SorT coil over suspension. Still in pieces.
'14 SHO with most all the bells and whistles. Stock for now.
F-150 SCab daily driver
j persons is offline  
post #67 of 91 (permalink) Old 05-11-2019, 12:35 PM
Senior Member
 
jdub's Avatar
 
Join Date: Dec 2011
Location: Colorado
Posts: 4,447
You should get a regular gold-colored Holley 650 Double Pumper if you're actually going to change carbs. Do it once, do it right.

As far as having 20hp in tuning, I got 16. But there is also margin for error between pulls due to differences in temp and so on. The AF was pretty good and totally flat even with an out of the box carb on the initial pull, the changes were very, very minor.

Quote:
Originally Posted by John_in_SC View Post
Wonder what the market is for the 750.
Probably good, it came off a good running car. That's usually what people want to know.

1965 Mustang
jdub is offline  
post #68 of 91 (permalink) Old 05-11-2019, 02:04 PM Thread Starter
Member
 
John_in_SC's Avatar
 
Join Date: Apr 2019
Location: Upstate
Posts: 54
Thanks jdub.

So here are some pics of the current quick fuel. I really like the look of it and the fact its chokeless. I an deal without a choke here in SC. Also wanted to show off that cool throttle linkage.

I've done a quick look and couldn't find the Holley 650 without a choke. Below is what I found:


QuickFuel

and

Holley

I imagine my fuel line setup should work in either or. I suspect it won't make much of a diff and I hear really good things about the QF

thoughts?
Attached Images
File Type: jpg IMG_0527.jpg (383.3 KB, 7 views)
File Type: jpg IMG_0528.jpg (361.6 KB, 7 views)

----------------------------------------------------------------
John in SC
Formerly Studiopet_2005
1966 Coupe - 302 with some stuff on it
John_in_SC is offline  
post #69 of 91 (permalink) Old 05-11-2019, 02:33 PM
Senior Member
 
j persons's Avatar
 
Join Date: Aug 2010
Location: Natchitoches, LA. at the edge of the swamp
Posts: 3,770
Quote:
Originally Posted by John_in_SC View Post
Thanks jdub.

So here are some pics of the current quick fuel. I really like the look of it and the fact its chokeless. I an deal without a choke here in SC. Also wanted to show off that cool throttle linkage.

I've done a quick look and couldn't find the Holley 650 without a choke. Below is what I found:


QuickFuel

and

Holley

I imagine my fuel line setup should work in either or. I suspect it won't make much of a diff and I hear really good things about the QF

thoughts?
https://www.summitracing.com/parts/h...41-1/overview/

John

The Fauxstang. Dynacorn 67 fastback. Dart SHP 363, Close ratio Magnum 6 speed, 3.70 Eaton Truetrac in a fabricated full floater 9", SorT coil over suspension. Still in pieces.
'14 SHO with most all the bells and whistles. Stock for now.
F-150 SCab daily driver
j persons is offline  
post #70 of 91 (permalink) Old 05-11-2019, 02:35 PM
Moderator
Supporting Member
 
Join Date: Dec 2012
Location: Huntsville, AL
Posts: 8,133
Garage
And if your looking for something not off the shelf and fully tuned ready to go for less money...https://www.smicarburetor.com/produc...0/productID/34


Regards,
Patrick
patrickstapler is offline  
post #71 of 91 (permalink) Old 05-11-2019, 02:37 PM Thread Starter
Member
 
John_in_SC's Avatar
 
Join Date: Apr 2019
Location: Upstate
Posts: 54
Holy crud - $672 versus 500$

LOL

----------------------------------------------------------------
John in SC
Formerly Studiopet_2005
1966 Coupe - 302 with some stuff on it
John_in_SC is offline  
post #72 of 91 (permalink) Old 05-11-2019, 09:08 PM Thread Starter
Member
 
John_in_SC's Avatar
 
Join Date: Apr 2019
Location: Upstate
Posts: 54
Just put the Holley 1850, Edelbrock 1405 and two sets of cylinder heads (cores) - C5AE (non-HiPO) and D80E up for sale on my local Craigs List. I also listed the QF-750 as well to see what happens. HMU on PM if interested.


Trying to post on the for sale forum here however I don't seem to have access to do that. Can any admins help me out with that?

----------------------------------------------------------------
John in SC
Formerly Studiopet_2005
1966 Coupe - 302 with some stuff on it
John_in_SC is offline  
post #73 of 91 (permalink) Old 05-11-2019, 09:27 PM
Moderator
Supporting Member
 
Join Date: Dec 2012
Location: Huntsville, AL
Posts: 8,133
Garage
Quote:
Originally Posted by John_in_SC View Post
Just put the Holley 1850, Edelbrock 1405 and two sets of cylinder heads (cores) - C5AE (non-HiPO) and D80E up for sale on my local Craigs List. I also listed the QF-750 as well to see what happens. HMU on PM if interested.


Trying to post on the for sale forum here however I don't seem to have access to do that. Can any admins help me out with that?
Because you havenít reached the minimum number of posts.

Regards,
Patrick
patrickstapler is offline  
post #74 of 91 (permalink) Old 05-11-2019, 09:44 PM
Just some guy
Supporting Member
 
GypsyR's Avatar
 
Join Date: Jun 2001
Location: SC foothills, USA
Posts: 18,788
Garage
Quote:
Originally Posted by John_in_SC View Post
JCan any admins help me out with that?
Sometimes a rule or two might be bent around here. Try it now.
bbmach likes this.
GypsyR is online now  
post #75 of 91 (permalink) Old 05-11-2019, 10:19 PM Thread Starter
Member
 
John_in_SC's Avatar
 
Join Date: Apr 2019
Location: Upstate
Posts: 54
Quote:
Originally Posted by GypsyR View Post
Sometimes a rule or two might be bent around here. Try it now.
Gold star for you.

----------------------------------------------------------------
John in SC
Formerly Studiopet_2005
1966 Coupe - 302 with some stuff on it
John_in_SC is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Vintage Mustang Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome