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| 4LEDboy |
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Utter madness!
_________________ Adelaide Motorplex < Click on it! You know you want too! Quote: Thats not the point *a**hole
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| dsyfer |
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Only had a bit of time to work on the plenum today, so just finished up the polish, will give it the final go over once the runners are on
   Sitting on top of mkI, gonna need to polish everything now to match.. 
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| dsyfer |
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All finished
     Now to move the Air con relays, so I can cut a hole for the pipe to go through. |
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| MadMatt |
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Will it have any supports going up to it from below?
_________________ Member Number 8804 |
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| FAST-XR |
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it cant be supported as the whole assembly moves with the motor
_________________ 07 BF MKII XR6T |
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| MadMatt |
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As in from the engine mount bolts on the block.......
_________________ Member Number 8804 |
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| dsyfer |
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I'm not sure that it will need it, once the pod is gone there is practically stuff all weight, maybe if it had a throttle body on the end, it could do with something.
Been looking at where I could put a WTA intercooler, there are two choices that I can find: Log style in behind the front bumper, or Box style where the air con fuses are, will try and find some info about the differences between the log and box styles |
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| ebs_4l |
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Looks pretty nice, but after putting a plenum over the trumpets, I cant see the gain by using the ITB's..
You going turbo I take it? If you were start over again, would you not just use trumpets into a plenum fronted by a single large throttle? What thickness ally was used to make your plenum? I see all the welds are ground smooth, did you end up welding inside and out? Cracking is a big problem in boosted sheet metal plenums of less than 4mm thickness, especially if you grind welds smooth for appearance. Yours may not be so bad, as it wont go from - to + pressure, just 0 to + pressure... Could do something like I did for a WTA cooler, garrett core... ford-turbo-supercharger-f22/time-for-a-revamp-eb6t-t59710.html?hilit=time%20for%20a%20revamp&start=20
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
ebs_4l wrote: Looks pretty nice, but after putting a plenum over the trumpets, I cant see the gain by using the ITB's.. It will make more power with the plenum. It already been proven with the first plenum that went on. it's drawing enough extra air over open trumpets that the AFR goes leaner then 14.7:1, with the same tune with no plenum was running at 12.5:1 And even that lean it accelerated quicker. |
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| ebs_4l |
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tickford_6 wrote: ebs_4l wrote: Looks pretty nice, but after putting a plenum over the trumpets, I cant see the gain by using the ITB's.. It will make more power with the plenum. It already been proven with the first plenum that went on. it's drawing enough extra air over open trumpets that the AFR goes leaner then 14.7:1, with the same tune with no plenum was running at 12.5:1 And even that lean it accelerated quicker. But hang on a second, I never said it wont/doesnt make more power... What I said, was once a plenum is involved, which covers the end of the trumpets, then what is the point of the ITB's?? SO, consider how he has it currently setup... now, remove the ITB's, and replace with a single throttle mounted in the 3in intake pipe, will this not give the same result??? leaving the trumpeted intake tubes in place, same length, but no throttles, just put the throttle after the filter To add to my opinion on this, if it makes more power/breathes better through that plenum... then clearly there was a design fault in his original ITB setup (breathing hot engine bay air), which could have been fixed with proper heat shielding, of a large box area.. A plenum over the ITB should never make more power than open ended trumpet setup.. ESPECIALLY a plenum THAT small, the plenum in any open trumpet system should be massive, to reduce the plenums effect... The only benefit the plenum serves, in any racing application, is the directing of fresh cold air to the trumpets... i.e V8 supercar, the plenum is just an air supply from the front of the car, and can generate positive pressures at high speed... on the engine dyno, it will always make more power with no plenum..
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| cuppas |
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with this, wouldnt you get the same thing like with RB-series engines where cyl 6 gets starved?
heard it somewhere a while back, not sure if i was being fed bs or not |
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| ebs_4l |
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your exactly right, hence the infinately big plenum for better air distribution... cyl 6 in this example will suffer big time..
put this thing on a dyno, make a power run, and then remove the 6 plugs, and post a pic of them all... #6 will be black
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| dsyfer |
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Guys, you need to remember, I'm not working for Ferrari trying to extract every 10th out of every lap, I'm just having fun pissing around in the shed
I don't have access to a track, so it is being built to have fun in and around the hills, the ITB's still give me better driving response, and now with the plenum, much more usable torque, and it smoothes the cam out down low. I did mention in an earlier post the 50mm tb's are too large for the current head/cam combo, so the plenum has help sort that problem. |
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| ebs_4l |
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I understand, kudos for such a sweet job!!
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| FAST-XR |
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even though the overall AFR might be fine, cyl 5 and 6 being starved could be masked by cyl 1 and 2 being overfueled... maybe its worth while adding a couple of extra 02 bungs to the extractors to check individual cylinders while its being tuned...
maybe not so critical whilst running a mild NA setup, but once boost comes along, you want to make sure its working as it should... but still i think the plenum volume needs to be increased (by shortening the runners and extending the body of the plenum towards the head) so air can be distributed better
_________________ 07 BF MKII XR6T |
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