Lotus Europa Community
Lotus Europa Forums => Garage => Topic started by: jpane on Tuesday,January 19, 2021, 12:37:38 PM
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I am finally getting around to installing the high balance tube manifold that was made for the Yahoo Group long ago. I think it came with a bracket for the throttle cable end, but I cannot find that. Does anyone have one (unlikely) or can you send a picture with dimensions?
Thanks very much, John
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Have you looked at the files that EuropaTC collected before the yahoo group was shut down? You may find something useful there: https://drive.google.com/drive/folders/1uOmTsXhIF3qlutvCvmY8sAaliwc8Rwbj
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BDA, thanks for the reminder of the new name and host for the Yahoo Group. I checked the link you sent and did not find what I needed. But now that I have been reminded to go to the new address, I will search the entire site.
I had a major computer glitch, mug of tea on the keyboard, lost "bookmarks".
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I bought the same Peter Baxter manifold also about to be finally installed on my TCS this year. I hope these pictures gives you an idea of the throttle bracket dimensions. If you need the exact dimensions let me know, I'll have to dig it out of its hiding place.
Joji Tokumoto
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It isn't as nice as Joji's piece but I took a plain aluminum right angle bracket and drilled holes to attach it to the manifold and a hole in the middle for the throttle cable. I didn't want to drill holes in my valve cover. My manifold is from an S4 Elan.
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Gumblebuns: Thanks, that's what I remember. I will keep looking, but the following post showed it easily replaced.
literarymadness: good, simple solution, thanks
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Literarymadness: Do you have the width and thickness of the angle aluminum that you used?
Thanks, John
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@jpane: My TCS is in the shop; I am having my rear brakes converted to disc brakes and my front brakes swapped out for vented discs. Should have it home by Tuesday and will measure those dimensions for you.
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on our dyno tests the larger the balance pipe (without going overboard) the more power & a smoother engine will be made on SUs & Strombergs, this is in line with David Vizards findings, it also pays to flow / blend the balance pipe entry from the manifold.
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literarymadness: thanks for offering to measure, but we've make one to fit out of angle aluminum
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on our dyno tests the larger the balance pipe (without going overboard) the more power & a smoother engine will be made on SUs & Strombergs, this is in line with David Vizards findings, it also pays to flow / blend the balance pipe entry from the manifold.
Do you know if there have been any dyno runs to determine if air trumpets on Strombergs or SUs make any difference in power. I don't think, just eyeballing the stock airbox, that there is enough room to fit trumpets inside the airbox. Also, I'm assuming trumpet length makes a difference on power.
On balance tubes, any idea if the location of the balance tube make any difference? One of my TCs have a balance tube moved to the cast portion of the head where the inlets are siamesed to the intake flange.
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The stock air box can accommodate intake "trumpets".
Yes, it does make a difference.
K&N developed a replacement air filter for the MGB and lost 2 to 3 hp when it was fitted! The stock MGB air filters have small "trumpets" as part of the air filter base plate. K&N had to make up their own version, which they sell separately, to get the power back up to stock.
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Who sells "trumpets" for the Strombergs?
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I think RD has trumpets for the Strombergs. They are quite short. It looks like he also sell an air filter that fits the two trumpets inside. I was just looking at that arrangement.
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@Turbo: R.D. sells them for $66 a pair and then you have the ones below.
https://www.pegasusautoracing.com/productdetails.asp?RecID=5142
@JBCollier: I'm curious on how you get the Trumpets inside the factory airbox and secure them (unless you meant the aftermarket replacement type). The bolts go from the outside of the airbox through to the other side onto the carburetor. How would you bolt the trumpets inside the airbox to the carburetor? I already have some trumpets but couldn't figure out a way around the mounting them inside the factory airbox issue. Any suggestions would be appreciated.
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My apologies. The stock air box has "room" for trumpets but you will have to modify them to fit. One way would be to cut out the trumpets for the mounting bolts. Myself, I would use short bolts to secure the backing plate and trumpets and then use an airbox cover from a Weber/Dell set-up for which you would have to make up custom mounts.
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on our dyno tests the larger the balance pipe (without going overboard) the more power & a smoother engine will be made on SUs & Strombergs, this is in line with David Vizards findings, it also pays to flow / blend the balance pipe entry from the manifold.
Do you know if there have been any dyno runs to determine if air trumpets on Strombergs or SUs make any difference in power. I don't think, just eyeballing the stock airbox, that there is enough room to fit trumpets inside the airbox. Also, I'm assuming trumpet length makes a difference on power.
On balance tubes, any idea if the location of the balance tube make any difference? One of my TCs have a balance tube moved to the cast portion of the head where the inlets are siamesed to the intake flange.
I answered this question in June of 2020. I don't know how to reproduce that post here. Search under balance tube.
Anyway, the engine runs great and was dynoed at 130 HP at the rear wheels. I have trumpets but they would never fit in the stock air box. Photo attached. I do not have a back to back dyno test however. Bell mouth inlets are much better for airflow than a sharp edge, which the carb has without the trumpet.
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@jpane: I would love to see what you did. Please post a photo if you can.
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I will get one tomorrow, and post. My mechanic made a bracket for the throttle cable out of angle aluminum.
Right now we've got a fitting in the breather opening, and will put a hose on that and maybe look at the filters for crankcase venting. When I got the car it just had a rubber tube fitted that curved down and just venting to atmosphere.
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I just bought two of those trumpets from RD. I still haven't figured out how to bolt them into the stock air box, since it has those molded in mounting tubes. Any ideas?
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Quick and simple. cut reliefs in your new bell mouths to clear the mounting bolts and spacers. You will still have way better flow than stock.
Better, mount the bell mouths and backing plate using short bolts. Adapt the air box cover from a Dell air box.