The Forward Look Network
The Forward Look Network
Search | Statistics | User Listing Forums | Chat | eBay | Calendars | Albums | Skins | Language
You are logged in as a guest. ( logon | register )

Poly 2x4
Jump to page : 1
Now viewing page 1 [50 messages per page]
View previous thread :: View next thread
   Forward Look Technical Discussions -> The Exhaust Pipe - Modification & PerformanceMessage format
 
ttotired
Posted 2019-05-21 6:04 PM (#582388)
Subject: Poly 2x4



Expert 5K+

Posts: 8307
500020001000100100100
Location: Perth Australia
I don't remember seeing one hogged out like this before

Whats the thoughts?

https://www.ebay.com/itm/Mopar-Dodge-Plymouth-318-Poly-Block-Dual-Qu...





(2x4 hogged outs.jpg)



Attachments
----------------
Attachments 2x4 hogged outs.jpg (108KB - 11 downloads)
Top of the page Bottom of the page
Powerflite
Posted 2019-05-21 8:01 PM (#582395 - in reply to #582388)
Subject: Re: Poly 2x4



Expert 5K+

Posts: 5434
500010010010010025
Location: So. California
Someone butchered it.
Top of the page Bottom of the page
ttotired
Posted 2019-05-21 8:48 PM (#582397 - in reply to #582388)
Subject: Re: Poly 2x4



Expert 5K+

Posts: 8307
500020001000100100100
Location: Perth Australia
I read that the 4 barrel nailhead manifold really benefits from having the individual holes
opened up to make left and right openings into slots. Not sure about how far this one has been done though.
It seems to have a big plenum area, so I would assume better for high rpm

Top of the page Bottom of the page
wayfarer
Posted 2019-05-22 12:18 PM (#582406 - in reply to #582388)
Subject: Re: Poly 2x4



Elite Veteran

Posts: 781
500100100252525
Location: Central Ory-Gun
Really has no effect on performance of the manifold itself...just allows for bigger carbs without a 'funnel'
Like Powerflite says..butchered...
Top of the page Bottom of the page
ttotired
Posted 2019-05-22 5:16 PM (#582423 - in reply to #582388)
Subject: Re: Poly 2x4



Expert 5K+

Posts: 8307
500020001000100100100
Location: Perth Australia
OK. I wont go as far as that with mine, but I will be either using 2 500cfm edelbrocks
like I did on the dodge or having a go with twin throttle body injection once the Plymouth is on the road (Be done with the 2 barrel first)

With the dodge, to fit the eddies, I had 2 alloy spread bore to square bore adaptor plates
(carbs were advertised as square, but the secondaries were bigger that the primaries) and I
was also having hot starting issues that then required phenolic plates between them and the carbs as well.

I ended up having to modify my air cleaner to fit under the bonnet

Hogging out the manifold to clear the butterflies or at least improve the airflow through the top of the manifold when you need to adapt
to different mountings must improve it somewhat.

If you were able to find and use factory carburettors, then opened up manifolds like that one wouldn't be any good (I guess)

Top of the page Bottom of the page
Jump to page : 1
Now viewing page 1 [50 messages per page]
Jump to forum :
Search this forum
Printer friendly version
E-mail a link to this thread



(Delete all cookies set by this site)