Plenum Options for a Montecarlo installation
Posted: September 7th, 2011, 11:55 am
Dear All,
Having added my long standing project details to the reader's car section of this forum recently, I thought I'd post up for advice on the next step I am considering. I did read Tricky's thread with a great deal of interest on designing and manufacturing an inlet manifold for a 16 valve, forced induction engine in a Delta.
This thread concerns the application of a plenum to a mid engine car, which is currently normally aspirated. The engine is an 8 valve unit with a non-reversed head, ie inlet is facing towards the front of the car, exhaust to the rear. This presents a problem in that all injection applications I have come across to date are based no the reverse port design, the practicalities of which will be highlighted on the pictures.
Please ignore the Monte inlet cam box with the distributor drive pocket, it's a spare head used for mocking this up. I have a Delta HF turbo ie inlet plenum (1.6) which I am using for the purpose of this post and will use if it proves to be servicable.
I have a number of options available to me and I welcome your comments
1. Leave the installation as is on throttle bodies and fabricate an airbox
2. Find an inlet plenum that does not foul on the cam wheel - possibly Croma?
3. Find an inlet plenum that has the throttle body at the other end
4. Alter the HF turbo ie plenum to suit
5. Fabricate a new plenum from scratch
Possible answers to problems above
1. Easiest and quickest solution as far as work involved, but would require a complete rethink if forced induction was
added at a later date.
2. Is there an inlet plenum that does not foul on the cam wheels and will not fould the bulkhead?
3. I have not seen any to date
4. As you can see from the pictures below, which I have added comment to, I can see a number of options but at this stage I have no idea of their merit or possibilty.
Of all options above, I think that the best would be to cut each end off the plenum and reweld so that the inlet is on the other side and the end of the plenum os then nowhere near the cam wheel. The other advantage is that by changing the throttle body to the other end, the pipework for the airfilter will have a less convoluted route.
5. I have no tooling to make a plenum from scratch, or material (although that would not present a problem sourcing), and no TIG welding equipment, even if my welding ability were up to snuff. Having one fabricated from drawings or cardboard template I think would be prohibitively expensive.
Any comments, suggestions or glaring errors you can spot?
Thanks and look forward to hearing from you.
Having added my long standing project details to the reader's car section of this forum recently, I thought I'd post up for advice on the next step I am considering. I did read Tricky's thread with a great deal of interest on designing and manufacturing an inlet manifold for a 16 valve, forced induction engine in a Delta.
This thread concerns the application of a plenum to a mid engine car, which is currently normally aspirated. The engine is an 8 valve unit with a non-reversed head, ie inlet is facing towards the front of the car, exhaust to the rear. This presents a problem in that all injection applications I have come across to date are based no the reverse port design, the practicalities of which will be highlighted on the pictures.
Please ignore the Monte inlet cam box with the distributor drive pocket, it's a spare head used for mocking this up. I have a Delta HF turbo ie inlet plenum (1.6) which I am using for the purpose of this post and will use if it proves to be servicable.
I have a number of options available to me and I welcome your comments
1. Leave the installation as is on throttle bodies and fabricate an airbox
2. Find an inlet plenum that does not foul on the cam wheel - possibly Croma?
3. Find an inlet plenum that has the throttle body at the other end
4. Alter the HF turbo ie plenum to suit
5. Fabricate a new plenum from scratch
Possible answers to problems above
1. Easiest and quickest solution as far as work involved, but would require a complete rethink if forced induction was
added at a later date.
2. Is there an inlet plenum that does not foul on the cam wheels and will not fould the bulkhead?
3. I have not seen any to date
4. As you can see from the pictures below, which I have added comment to, I can see a number of options but at this stage I have no idea of their merit or possibilty.
Of all options above, I think that the best would be to cut each end off the plenum and reweld so that the inlet is on the other side and the end of the plenum os then nowhere near the cam wheel. The other advantage is that by changing the throttle body to the other end, the pipework for the airfilter will have a less convoluted route.
5. I have no tooling to make a plenum from scratch, or material (although that would not present a problem sourcing), and no TIG welding equipment, even if my welding ability were up to snuff. Having one fabricated from drawings or cardboard template I think would be prohibitively expensive.
Any comments, suggestions or glaring errors you can spot?
Thanks and look forward to hearing from you.