CaliforniaSpecial.com -- Message Boards -- 1968 California Special Limited Edition Ford Mustang GT/CS
D I S C U S S I O N . F O R U M
COMMUNITY
1968 GT/CS & HCS
2007+ GT/CS
1966-1967 HCS

Vote!

Old 10/01/2015, 08:22 AM   #1
daveS
 

Joined: Jun 09
Posts: 49

302 4V exhaust manifolds ??

Hey there experts! I am working on an engine restoration of my '68 GTCS. It's a 302 4V. The process is slow but fun!

We've done some to the heads to improve flow and I would like to get some exhaust manifolds that have less constriction and allow the motor to breathe a bit better. I know that there are the HiPo 289 exhaust manifolds out there (posted a want ad in the classifieds) but they seem to be sort of rare. I've seen the Scott Drake reproductions of these and am considering buying some of those. However, I have heard that the repros have quality/alignment issues.

Do you guys have any recommendations on the HiPo manifolds or the reproductions? Any recommendations on some proper manifolds for this engine (other than the stock ones)?

Thanks!
-Dave

Last edited by daveS; 10/01/2015 at 12:29 PM..
daveS is offline   Reply With Quote
Old 10/01/2015, 09:21 AM   #2
stangfan
 
stangfan's Avatar
 
GT/CS 8R01C150245

Location: Victoria, BC Canada
Joined: Jun 12
Posts: 1,281

My Garage
Have you considered the Tri-Y headers?

Steve Cracknell
stangfan is offline   Reply With Quote
Old 10/01/2015, 10:39 AM   #3
daveS
 

Joined: Jun 09
Posts: 49

Quote:
Originally Posted by stangfan View Post
Have you considered the Tri-Y headers?
Yeah I've heard about those and thought perhaps they might work. My experience with headers is has been that they almost always leak. Is this the case with the Tri-Ys? Who makes these? Any clearance issues with these? Also, I was hoping to get some castings that look stock in order to preserve the "factory look" under the hood.
daveS is offline   Reply With Quote
Old 10/01/2015, 11:05 AM   #4
CougarCJ
My Car Details
 
CougarCJ's Avatar
 
Spaceman Spiff

Location: Beautiful Willamette Valley
Joined: Jul 06
Posts: 1,816

My Garage
1969-70 351W exhaust manifolds, poor mans HiPo exhaust.

Scott Behncke
1968 GT/CS 302-4V Honors flysis income beezis onches nobis inob keesis
West Coast Classic Cougar A good source for Mustang mechanical parts too.
CougarCJ is offline   Reply With Quote
Old 10/01/2015, 11:18 AM   #5
BigJim
 
BigJim's Avatar
 

Joined: Feb 12
Posts: 315

My Garage
We have Tri-Y's on our 68 and have not had any problems with them. They are better then stock but I would imagine regular long tubes might produce a couple more horses but I'm not sure it would be worth the effort for a street car.

BigJim
'68 GT/CS, Presidential Blue, Numbers Matching, J-Code, C-4
BigJim is offline   Reply With Quote
Old 10/01/2015, 03:09 PM   #6
robert campbell
My Car Details
 

Location: Bremerton Washington
Joined: Apr 07
Posts: 3,646

My Garage
Scott is correct about the 351 Windsor manifolds. They are basically identical to the Hipo manifold, but they are also hard to find. The repops I have worked with are just fine. You will need to have a local guy hook them to your stock H-pipe as they are way different than stock manifolds in there exit location.

One other consideration is a shorty header. JBA is top cabin stuff. These work well with power steering and do not interfere with your power steering ram of hose routing. I think they are a definite step better than the Hipo manifolds in performance

http://www.cjponyparts.com/jba-289-3...FUSCfgodAXcD3w

In my opinion the best long tube on the marker is the Ford Powertrain Applications header. It clears the ram without dropping it. Tucks up very tight. It does require a late model small diameter 302 starter. And it forces you to really look at your power steering hose routing. But it will work, just check lock to lock clearance of the hoses. I have the #2 on both my cars

http://www.fordpowertrain.com/FPAindex/Mustang1.htm

Here is a pick of how tight they tuck up. Notice the frame rails in relationship.

robert campbell is offline   Reply With Quote
Old 10/02/2015, 11:56 AM   #7
daveS
 

Joined: Jun 09
Posts: 49

Quote:
Originally Posted by CougarCJ View Post
1969-70 351W exhaust manifolds, poor mans HiPo exhaust.
Thanks Scott. Do you know if these will drop in directly with no fit issues at the head or otherwise? Are these C9OE-9430-B, passenger side and DOOE-9431-B driver side?
-Dave
daveS is offline   Reply With Quote
Old 10/02/2015, 11:57 AM   #8
daveS
 

Joined: Jun 09
Posts: 49

Quote:
Originally Posted by robert campbell View Post
Scott is correct about the 351 Windsor manifolds. They are basically identical to the Hipo manifold, but they are also hard to find. The repops I have worked with are just fine. You will need to have a local guy hook them to your stock H-pipe as they are way different than stock manifolds in there exit location.

One other consideration is a shorty header. JBA is top cabin stuff. These work well with power steering and do not interfere with your power steering ram of hose routing. I think they are a definite step better than the Hipo manifolds in performance

http://www.cjponyparts.com/jba-289-3...FUSCfgodAXcD3w

In my opinion the best long tube on the marker is the Ford Powertrain Applications header. It clears the ram without dropping it. Tucks up very tight. It does require a late model small diameter 302 starter. And it forces you to really look at your power steering hose routing. But it will work, just check lock to lock clearance of the hoses. I have the #2 on both my cars

http://www.fordpowertrain.com/FPAindex/Mustang1.htm

Here is a pick of how tight they tuck up. Notice the frame rails in relationship.

Awesome Rob. You are shedding a lot light for me on perhaps going with headers. Are there any fit/interference issues with either of these other than having the adjust where the exhaust pipes tie in?
-Dave
daveS is offline   Reply With Quote
Old 10/02/2015, 03:03 PM   #9
clubpro
 
clubpro's Avatar
 

Location: Orangevale, California
Joined: Feb 03
Posts: 624

Cool

Dave,

Here are a pair of 69-70 351w manifolds -

http://www.ebay.com/itm/FORD-MUSTANG...ae5e76&vxp=mtr

Cheers,

Ron

"You can't build a reputation on what you're going to do." - Henry Ford
clubpro is offline   Reply With Quote
Old 10/02/2015, 03:46 PM   #10
whodat
 
whodat's Avatar
 

Location: Metairie, La
Joined: Mar 10
eBay: metronash
Posts: 612

I am strongly considering Sanderson FF3GTS-SEC headers. I was considering the JBA Headers as well. 1650SJS
302 p/s aod a/c
whodat is offline   Reply With Quote
Old 10/02/2015, 04:45 PM   #11
robert campbell
My Car Details
 

Location: Bremerton Washington
Joined: Apr 07
Posts: 3,646

My Garage
The JBA shorty's are 1 and 5/8 vice 1 and 1/2 in diameter. Small difference, but the tube must be stretched to cover the exhaust port without anything lapping inside the port. Not a problem on stock heads, but if your exhaust openings on the head are ported it could be a problem. I had this problem with a cheap set of long tubes that were 1 and 1/2 in a diameter.

The JBA's mated well to my Edelbrock performer RPM Aluminum heads.

Rob
robert campbell is offline   Reply With Quote
Old 10/03/2015, 06:01 AM   #12
whodat
 
whodat's Avatar
 

Location: Metairie, La
Joined: Mar 10
eBay: metronash
Posts: 612

Not to hijack this thread but Robert that was the information I was looking for.
whodat is offline   Reply With Quote
Old 10/03/2015, 09:44 AM   #13
robert campbell
My Car Details
 

Location: Bremerton Washington
Joined: Apr 07
Posts: 3,646

My Garage
Whodat,
The Hipo and Windsor manifolds suffer from the same problem. In stock form their inlet passages are to small for heads that have been ported on a bunch. I have a set of iron heads that actually have bigger exhaust ports than the Edelbrock RPM heads.

Although you can port on both the Hipo and Windsor manifolds. They have plenty of meat on them. Just takes time.

Rob
robert campbell is offline   Reply With Quote
Old 10/03/2015, 09:56 AM   #14
robert campbell
My Car Details
 

Location: Bremerton Washington
Joined: Apr 07
Posts: 3,646

My Garage
Quote:
Originally Posted by daveS View Post
Awesome Rob. You are shedding a lot light for me on perhaps going with headers. Are there any fit/interference issues with either of these other than having the adjust where the exhaust pipes tie in?
-Dave
Total bolt in. The only change is to a 302 starter from say 1985 up. They even sell high torque starters in this configuration. They are much smaller in diameter.

On the subject of the "clock-able" high torque starters, I tried two of them. They would not fit these headers.

The ball socket collector connection also saves a lot of ground clearance and does not leak.

But if you have power steering the hose routing is always an adventure. I have manual on both my cars.

Rob
robert campbell is offline   Reply With Quote
Old 10/06/2015, 12:45 PM   #15
daveS
 

Joined: Jun 09
Posts: 49

Quote:
Originally Posted by clubpro View Post
Dave,

Here are a pair of 69-70 351w manifolds -

http://www.ebay.com/itm/FORD-MUSTANG...ae5e76&vxp=mtr

Cheers,

Ron
Cool thanks Ron. I tried the grab these but I was out bid. It turns out that he sold me another set he had, so I got lucky.

My engine is out of the car getting rebuilt right now. Once these manifolds arrive, we're going to assembly a dummy 302 block+heads we have sitting around, and also put these 351W manifolds on...this will be a fit test template. We'll drop this into the car to test the clearances before we put them on the finished motor. If everything fits well, then great! If not, I'll probably look into the headers options that Rob mentioned.
daveS is offline   Reply With Quote
Reply

  CaliforniaSpecial.com Forums > GT/CS and HCS Forums > GT/CS and HCS Discussions

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted - HiPo exhaust manifolds for 302 4V daveS Classified Ads 0 09/11/2015 08:58 AM
1968 - GT/CS Engine rebuild...go stock or mod? daveS GT/CS and HCS Discussions 34 07/28/2015 06:12 PM
1968 - 351 v 302 x-codegtcs GT/CS and HCS Discussions 6 08/10/2013 02:30 PM
HiPo Exhaust Manifolds Mosesatm Engine 9 01/05/2011 07:36 PM
Questions - BRAKES AND EXHAUST manifolds gt bandit GT/CS and HCS Discussions 6 05/27/2006 07:55 PM


All times are GMT -7. The time now is 12:33 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2017, vBulletin Solutions Inc.


This site created, owned and maintained by Jon Hanna - Copyright 1996-2011
All rights reserved. CaliforniaSpecial.com is not affiliated with Ford Motor Company

ShowCase vBulletin Plugins by Drive Thru Online, Inc.