44idfs on 48mm manifolds

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 · 4 Mar 2010, 11:30 pm

#765844

i have just realised i have 44'idf's on 48mm manifolds,. so will this effect flow and HP. im guessing its not good for performance but some tech info on this would be great...

thanks...

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 · 6 Mar 2010, 11:06 am

#766111

hhmmm, NO ONE??

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 6 Mar 2010, 11:18 am

#766113

I have been told they will fit
It is a one size manifold

Futue te ipsum!!!

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 6 Mar 2010, 12:03 pm

#766120

99% of the IDF manifolds that you buy today are suited for the 48 size.........It will make bugger all difference.

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 6 Mar 2010, 12:23 pm

#766125

What about the bottom end??
Mine are "small bore" manifolds and suit my stock heads

if yours are "48" manifolds are they some H-U-G-E mother manifold port

That may effect stuff if you have stock inlets on your heads

Futue te ipsum!!!

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 · 6 Mar 2010, 2:41 pm

#766134

Most manifolds are this way. It's the way it is and although I like to see back to back tests, I don't think you have a lot of options. It's not a big deal but I agree it doesn't look the best for low speed response.
Just means you should build a bigger motor and run 48's. 😀

Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 · 6 Mar 2010, 5:08 pm

#766156

they are match ported to the heads and are not stock ports. i thought i had a miss match and that 44 idf manifolds would come to 44mm at top of manifold. but cool, if thats the case then there staying on... thanks boys....