My Twin Plenum Conversion (taken from old forum 2006)

General Chat About Exhaust, Cylinder Heads, Fuel Systems And Intake

Moderator: phpBB2 - Administrators

Post Reply
Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

My Twin Plenum Conversion (taken from old forum 2006)

Post by Coops »

Session1 1 Jan 2006,

Well today i bit the bullet and decided to get my arse into gear and get on with the car,
Started by porting out the original hotwire manifold base to match the Twin plenum trumpet base,
as you can see the hotwire manifold needs opening out to match,
Image
Image

The start of the port opening,
Image

4hrs later we get this,
Image
Image

The trumpet outlet on the TP is 42mm and the hotwire trumpet outlet is 38mm,

and the Twin plenum base left and standard hotwire trumpet base on the right,
Image

Only bad news is on sorting out a stuck throttle (thread on shaft fooked under lock nut),
upon removal the shaft broke,

Image

any one got a spare one??? its the one for the TPS,

It comes from one of theses:
Image

Session 2 Jan 2006,

Spent today sorting out converting the twin plenum from running an over run valve to the hotwire stepper motor set up,
making up the water hoses,
sorting out the throttle linkage,
and fitting the hot wire breathers to the TP trumpet base,

Over run valve-stepper conversion.
First remove the over run valve,
Image
Image

Then remove the fuel reg vacuum pipe stub so the stepper housing can be fitted (the stepper housing has an air way that lines up where the stub would of been),
Image

I offered up the stepper housing and had to file the 3 holes in the housing a fraction so every thing lined up with the vacuum hole
Image

while sorting the stepper out i made a blanking plate for the old cold start injector mounting,
Image

Breathers:
On the side of the TP trumpet base i noticed a blanking plug that looked like the same as the hotwire base,
I removed the plug from the TP manifold, and then gently removed the breather stub from the hotwire one,
applied a drop of bearing-stud fix fluid and tapped it into the hole on the TP base,
Image

just need to blank off one of the larger outlets which would go to the original extra air valve, any one know of any rubber blanking stubs to block of pipes? (if you look in the picture for the cold start blanking plate it's the breather stub to the right at bottom of the pic))

Water pipes:
Water pipes were straight forward, just conected up to the O/E water lines,

Throttle Linkage:
I used the original Twin plenum linkage set up and Sd1 efi cable,
Image

Finnished Plenum:
When finnished it looks like this with hoses etc connected,
The breather hose to stepper can do with being shortened,
you can see the water pipe coming from plenum and going back under,
Image
Image
Image


Side view of trumpets,
Image

Session 3 Feb 2006,

Vems Ecu:

Thanks to Richard and Rob (phat transmissions)[:D], for getting the VEM's ecu to me today, now comes the fun of the install and tunning,
Image

The new silicone vacuum hose arrived at last,
had to do a few mods to the securing nut to suit the larger diameter hose,
(it's only 4mm id BUT has a 3mm wall thickness)
Image

Top view of ecu and hose,
Image

Ally mounting bracket which was made at work [;)]
Image

Inside view of ecu mounting bracket, with foam insert strips,
Image


Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

Duke_Thrust
Newbie
Newbie
Posts: 13
Joined: Wed May 28, 2008 12:57 pm

Post by Duke_Thrust »

Are you using the Hotwire fuel rail?

Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

yes mate that was the whole idea of using the hotwire manifold base, :wink:
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

Duke_Thrust
Newbie
Newbie
Posts: 13
Joined: Wed May 28, 2008 12:57 pm

Post by Duke_Thrust »

Ah sorry, larger capacity?

What are the differences between the hotwire manifold and the flapper?

(Mine has been ported and matches my 45mm trumpets so I'd like to contiune using it and not the hotwire one ported and matched)

Really useful thread though, cheers!!

v8man
Helpful or Confused
Helpful or Confused
Posts: 99
Joined: Sat Nov 18, 2006 8:03 am

Post by v8man »

:D hi tony

is this the best FI for the rover v8 ??

cheers

Gil

katanaman
Site Admin
Site Admin
Posts: 3081
Joined: Fri Nov 17, 2006 7:29 pm
Location: Edinburgh
Contact:

Post by katanaman »

Duke_Thrust wrote:Ah sorry, larger capacity?

What are the differences between the hotwire manifold and the flapper?

(Mine has been ported and matches my 45mm trumpets so I'd like to contiune using it and not the hotwire one ported and matched)

Really useful thread though, cheers!!
Modern standard sized injectors dont fit the flapper manifold. This can make getting new injectors difficult and expensive.

Duke_Thrust
Newbie
Newbie
Posts: 13
Joined: Wed May 28, 2008 12:57 pm

Post by Duke_Thrust »

Ah, interesting.

I have a set of Jag jobs that I had reconditioned - I'll use them for now and keep the hotwire manifold if I need to have it ported for the 45's at a later date.

User avatar
demo2
Moderator Gold
Moderator Gold
Posts: 307
Joined: Sun Nov 19, 2006 6:23 pm
Location: Australia (Perth)

Post by demo2 »

Tony, where did you get the brass fitting to go in the end of the fuel rail where the regulator used to go?

Coops
Site Admin
Site Admin
Posts: 6317
Joined: Fri Nov 17, 2006 7:43 pm
Location: Newbury, Berks
Contact:

Post by Coops »

that came with the adjustable fuel reg mate.

i may have another here somewhere will have a look around for you.
Regards Tony C (COOPS)
Image
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts. :D
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk

User avatar
demo2
Moderator Gold
Moderator Gold
Posts: 307
Joined: Sun Nov 19, 2006 6:23 pm
Location: Australia (Perth)

Post by demo2 »

Arh, i allready have an adjustable fuel reg on the flapper, will use that on hotwire. Wonder if i could tig a fitting into the end of the rail, gotta cut n shut the passenger rail so it comes closer to the manifold as it fowls my bulkhead, so if i gotta tig that may as well tigg something onto the end of the other rail.

Post Reply

Return to “Exhaust, Cylinder Heads, Fuel And Intake Area”