Induction - JE or ACT Plenums
Discussion
Hey, does anyone here have any experience of running these two? JE has a old school looking triple and then there ACT twin and triple carbon fibre plenums. JE are dearer, so wondering if the ACT are n equal option as regards performance?
On the other end of the system - if you were to only have one of the above plenums OR a Clive F equal length manifold, which one would offer the best bang for buck??
On the other end of the system - if you were to only have one of the above plenums OR a Clive F equal length manifold, which one would offer the best bang for buck??
NA tuning is never best bang for the buck 
if you want to have that leave it as it is and put either a blower or turbo on it.
As for the JE you need to measure if it fits under the bonnet. As for the ACT as there
are running several it should. Headers ? hmmm If you have already the biggest
heads available on your engine and anything properly done headers are the
last step to finalize the built.............
if you want to have that leave it as it is and put either a blower or turbo on it.
As for the JE you need to measure if it fits under the bonnet. As for the ACT as there
are running several it should. Headers ? hmmm If you have already the biggest
heads available on your engine and anything properly done headers are the
last step to finalize the built.............
Yeah, I appreciate N/A isn't the way to go for ultimate power, I'm only looking for the best drivability and character I can. Noise, response...that sort of thing! 
Heads will be V8D Ultra, so just wondering would a plenum be a better upgrade or would it be the equal length manifolds with a 72mm plenum??.
Heads will be V8D Ultra, so just wondering would a plenum be a better upgrade or would it be the equal length manifolds with a 72mm plenum??.
What size engine is it.
If my reading is correct on the 5.0 the plenum is supposed to require 5% or something like that more air than the standard plenum can provide. If in the real world it makes much difference I doubt and 72mm might draw that extra 5% ok anyway.
If it's drivability and extra power and much more, go after market Ecu as that will do wonders for the car in my experience. Faster and far more controllable power, linear rather than lumps of fuel going in, it's easier to stabilise the power with your foot. It's a joy. Like a motorbike throttle, finite settings and in Mbe's case mapped at 100 Rev intervals I think it is.
Induction mods can add upto a big sum of money, I've gone the other way leaving all the induction alone other than removal of AFM from intake line which alone seems to add loads more air. 38 mm trumpets ( inlet is matched to head I believe as part of engine rebuild as I asked for gas flowing etc. It's a 4.6 and probably has around 290-295 Bhp so no slouch but it's actually quite restricted then on long thin trumpets for hp figures but it does help push torque figures quite high, 340-345 ft lb torque so in any gear it's a beast and really fast.
This big torque figure coupled with lovely fuelling allows for effortless acceleration of roundabouts in third gear as low as 1000 revs effortlessly. This is huge as I can stay off the clutch and make less gear changes, it's really nice to drive. That's why i did all this work for the smooth drive. Advance and retarding if the ignition is also something the RV seems to respond to very well. Feels modern.
It can cost a lot of money for induction mods only for it to be let down by other more important factors in my opinion.
It's worth thinking about as there are some good Ecu options available
If my reading is correct on the 5.0 the plenum is supposed to require 5% or something like that more air than the standard plenum can provide. If in the real world it makes much difference I doubt and 72mm might draw that extra 5% ok anyway.
If it's drivability and extra power and much more, go after market Ecu as that will do wonders for the car in my experience. Faster and far more controllable power, linear rather than lumps of fuel going in, it's easier to stabilise the power with your foot. It's a joy. Like a motorbike throttle, finite settings and in Mbe's case mapped at 100 Rev intervals I think it is.
Induction mods can add upto a big sum of money, I've gone the other way leaving all the induction alone other than removal of AFM from intake line which alone seems to add loads more air. 38 mm trumpets ( inlet is matched to head I believe as part of engine rebuild as I asked for gas flowing etc. It's a 4.6 and probably has around 290-295 Bhp so no slouch but it's actually quite restricted then on long thin trumpets for hp figures but it does help push torque figures quite high, 340-345 ft lb torque so in any gear it's a beast and really fast.
This big torque figure coupled with lovely fuelling allows for effortless acceleration of roundabouts in third gear as low as 1000 revs effortlessly. This is huge as I can stay off the clutch and make less gear changes, it's really nice to drive. That's why i did all this work for the smooth drive. Advance and retarding if the ignition is also something the RV seems to respond to very well. Feels modern.
It can cost a lot of money for induction mods only for it to be let down by other more important factors in my opinion.
It's worth thinking about as there are some good Ecu options available
Ecu will be taken care of as i collected a GEMS off mark adams last week. Heads and inlet will flowed and if their not already BV that'll get done the same time as the block gets Top Hatted, bits balanced with lighter flywheel and stealth cam.
Was probably going 72mm plenum same time, but I've read a few good things about ACT carbon plenums and JED ones. One or two reports suggesting not needed or effective...but then there's Matthew Poxon saying how great they are. .. and that's the effect I'd like!
Was probably going 72mm plenum same time, but I've read a few good things about ACT carbon plenums and JED ones. One or two reports suggesting not needed or effective...but then there's Matthew Poxon saying how great they are. .. and that's the effect I'd like!
I run an ACT triple but that is only part of it.
It really works well as part of a kit of matched parts, Big valve heads, porting, camshaft et cetera et cetera.
Personally I am very happy with my NA route as the power is seamless from idle all the way to the red line.
If you want to chat, PM me your number or if you are ever in the area or want a feel of what decent NA power feels like, let me know.
It really works well as part of a kit of matched parts, Big valve heads, porting, camshaft et cetera et cetera.
Personally I am very happy with my NA route as the power is seamless from idle all the way to the red line.
If you want to chat, PM me your number or if you are ever in the area or want a feel of what decent NA power feels like, let me know.
Maybe the triple is an overkill ,they only run on half throttle even on the monster 5.5 s..
If someone offered me one at a decent price I would buy one vut I think the gains are minimal.
I reckon the twin would work well .
My 5l with the standard plenum , larger throttle made it to 60mph in 3.2 seconds and the quarter mile in 12.08 .
Running the triple would make little or no difference .
If someone offered me one at a decent price I would buy one vut I think the gains are minimal.
I reckon the twin would work well .
My 5l with the standard plenum , larger throttle made it to 60mph in 3.2 seconds and the quarter mile in 12.08 .
Running the triple would make little or no difference .
I am running the ACT twin on mine. My thoughts are below:
https://matthewpoxon.wordpress.com/2014/05/01/act-...
https://matthewpoxon.wordpress.com/2014/05/01/act-...
Matthew Poxon said:
I am running the ACT twin on mine. My thoughts are below:
https://matthewpoxon.wordpress.com/2014/05/01/act-...
Will my OE original trumpet base fit ?https://matthewpoxon.wordpress.com/2014/05/01/act-...
Do you know the size of the trottle bodies ?
Hi Phased, that's great and thanks for the offer. I'll drop you a pm.
MR Haribo..so other than the 15bhp you achieved, did you feel any other improvements? And so your JED triple came complete with a base?
Matthew Poxon - thanks for that. I'd read your thoughts on the twin before, and it's that kinda improvement is he after. Actual horse power is less relevant than the extra feel and deiveability it appears to give you.
Adrian
MR Haribo..so other than the 15bhp you achieved, did you feel any other improvements? And so your JED triple came complete with a base?
Matthew Poxon - thanks for that. I'd read your thoughts on the twin before, and it's that kinda improvement is he after. Actual horse power is less relevant than the extra feel and deiveability it appears to give you.
Adrian
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