Turbo Plenum Spacer Group Buy - Page 8 - LotusTalk - The Lotus Cars Community
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post #141 of 208 (permalink) Old 07-05-2016, 02:14 PM
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From prior notes, the original bolts are (2) @ 55mm (replace with 80mm) and (8) at 80mm (replace with 105 or 110mm). Any reason that two of the eight original 80mm bolts would not serve just fine as the shorter 80mm replacements? Not worried about $4 but since they are sitting there.. After all they are genuine Lotus Bolts!

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post #142 of 208 (permalink) Old 07-05-2016, 07:37 PM
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Quote:
Originally Posted by flowersrj View Post
Hi,

If I wanted to use the full "fat lip" velocity stacks that MrDangerous mentions in the "X180 IMPROVEMENTS" topic (post 65) in my S4s along with this 1" spacer, how high should they project above the surface?

Thanks,
Rich
Rich,

Go for 40mm, even 44mm-that will give you 355mm runners. (1.3" dimension on the picture should be 55mm)
The plenum plate holes (ID) were precision ground and stack OD was slightly reduced for tight press-fit. I have used Rocksett engineering adhesive (Cotronics Resbond 907GF adhesive can also be used) to secure parts (hopefully forever, LOL)
Cotronics Resbond 907GF 2300°F Adhesive and Sealant - 11 oz Tube at SkyGeek.com

For more info, see "X-180 Improvements" thread, Post No.65,66 and 374.
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post #143 of 208 (permalink) Old 07-06-2016, 08:44 AM
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MrDangerous,

Thanks for reply. Exactly where is that dimension taken? Is it from the mating surface of the plenum where the intake runners attach?

Rich



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Originally Posted by MRDANGERUS View Post
Rich,

Go for 40mm, even 44mm-that will give you 355mm runners. (1.3" dimension on the picture should be 55mm)
The plenum plate holes (ID) were precision ground and stack OD was slightly reduced for tight press-fit...
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post #144 of 208 (permalink) Old 07-06-2016, 05:07 PM
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MrDangerous,

Thanks for reply. Exactly where is that dimension taken? Is it from the mating surface of the plenum where the intake runners attach?

Rich
Measured from the inner wall to the top of the funnel,
30-40mm it may be as tall as 44mm. Some say taller is better. Initially, I made them 30-35mm.
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Last edited by MRDANGERUS; 07-09-2016 at 01:21 PM.
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post #145 of 208 (permalink) Old 07-07-2016, 05:15 AM
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Went to drive to office today, putting engine cover back on and erk.. with intake moved to the right 2" (would be 1" if use one spacer) it of course will not lay flat. Going to have to do some trimming this weekend.. :P

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==============================
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post #146 of 208 (permalink) Old 07-07-2016, 07:21 AM
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MrD,

Do you mean from the surface where the "4 3 2 1" show up in red marker?

Plus, I am assuming you went for the ones on the left in the picture at bottom based on your picture where the bell does not flare much, if at all.

Thanks, Rich


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Rich,

Go for 40mm, even 44mm-that will give you 355mm runners. (1.3" dimension on the picture should be 55mm)
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post #147 of 208 (permalink) Old 07-08-2016, 06:41 AM
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post #148 of 208 (permalink) Old 07-09-2016, 08:43 AM
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Quote:
Originally Posted by MRDANGERUS View Post
YES,and yes.
The left one.
89mm mouth is too big!
If swapped to those what improvements would feel SOP?

Kenny; Dallas Tx
==============================
1995 Lexus SC300 - SOLD
1990 Nissan 300ZX - SOLD
1990 Nissan 300ZX Twin Turbo - SOLD
1996 Porsche 911 Cab - SOLD
1989 Porsche 928 S4 - SOLD
1994 Lotus Esprit S4
Test pipe, Ramspott & Brandt center exit exhaust, 2002 center exhaust valance, Alunox performance exhaust manifold, Spax coilovers with Eibach front springs, Elise steering wheel
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post #149 of 208 (permalink) Old 07-09-2016, 08:46 AM
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Quote:
Originally Posted by MidLifeZ View Post
Went to drive to office today, putting engine cover back on and erk.. with intake moved to the right 2" (would be 1" if use one spacer) it of course will not lay flat. Going to have to do some trimming this weekend.. :P
Trimmed cover to fit! Only had to trim 1 1/4" even though I installed two spacers (2" thick) so those who only install one may not have to do any at all.

Dremel, plastic bit and 20 minutes or so... the angle at the rear I cut matches much more closely the angle on the intake than it looks like in the photos. Except for there and a small spot at rear the only cuts were to horizontal portion.

EDIT 07/11/2016
since do not have a way to bend the original brace I made one out of 1" slotted angle steel. Mounted to front most bottom bolt on intake cover and empty hole on the AC compressor. Super easy and quick.
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mieczkow, lotus4s and MRDANGERUS like this.

Kenny; Dallas Tx
==============================
1995 Lexus SC300 - SOLD
1990 Nissan 300ZX - SOLD
1990 Nissan 300ZX Twin Turbo - SOLD
1996 Porsche 911 Cab - SOLD
1989 Porsche 928 S4 - SOLD
1994 Lotus Esprit S4
Test pipe, Ramspott & Brandt center exit exhaust, 2002 center exhaust valance, Alunox performance exhaust manifold, Spax coilovers with Eibach front springs, Elise steering wheel

Last edited by MidLifeZ; 07-11-2016 at 07:13 AM.
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post #150 of 208 (permalink) Old 07-24-2016, 06:27 PM
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Jon,

Check your Lotustalk PM. I sent a message to you regarding the spacer.

Tom

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1989 Esprit Turbo

Last edited by mieczkow; 07-24-2016 at 07:55 PM.
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post #151 of 208 (permalink) Old 08-10-2016, 04:08 AM
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Quote:
Originally Posted by MRDANGERUS View Post
YES,and yes.
The left one.
89mm mouth is too big!
I remember seeing a mod done to the plenum with aluminum pipe sections welded in. Do you have the spec sheet still. I want to do that when I put the spacer on

Thanx, Jenna
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post #152 of 208 (permalink) Old 08-10-2016, 05:01 AM Thread Starter
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The "snowplow" mod :-)

https://www.lotustalk.com/forums/4733777-post10.html

What color is your plenum???

Jonboy

1984 Esprit Turbo "Vivian"
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post #153 of 208 (permalink) Old 08-11-2016, 05:02 PM
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Installed today

Installed the spacer this morning. Had to do some fettling with the new support bracket but other than that it was pretty straightforward.
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post #154 of 208 (permalink) Old 08-11-2016, 06:31 PM
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Originally Posted by Jenna'sEspritTurbo View Post
I remember seeing a mod done to the plenum with aluminum pipe sections welded in. Do you have the spec sheet still. I want to do that when I put the spacer on

Thanx, Jenna
Here is a picture of my "napkin" sketch. Some dimensions are in mm and some of them can be ignored.
3.5-4" ID thin wall tubing may be used. ID is not critical, just keep it symmetric.

Happy fabricating
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Last edited by MRDANGERUS; 08-11-2016 at 06:40 PM.
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post #155 of 208 (permalink) Old 08-12-2016, 07:38 AM Thread Starter
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2 EXTRA Spacers Available

I have 2 extra spacers available from the spacer group buy. These were made at the same time and they fit perfectly as can be seen on other members cars. The cost from the group buy was $157.65 all in including shipping and Paypal fees.



First come, first served.

Jonboy

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post #156 of 208 (permalink) Old 08-19-2016, 01:52 PM
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Ran into a problem with my install. The forward end of the spacer is touching a screw on the alternator, and almost touches the alternator heat sink.

The the original plenum cover has a flange a bit larger at the mating surface. The spacer is designed to match the flange. The original plenum has an area milled to clear the alternator. When you insert the spacer that moves the larger area outward to the right, so the original area cleared for the alternator is now in the wrong place.

I am having a local machine shop mill off a little material off both the spacer and the original flange. About 1/8" to 3/16" should be sufficient and there is plenty of material remaining.

No one else has mentioned this so it might be a variance from car to car. I don't think my alternator has ever been off the car. Not hard to correct but definitely inspect during your install, you would not want the plenum to actually touch the alternator.

Don
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post #157 of 208 (permalink) Old 08-19-2016, 03:23 PM
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^^^ Perhaps the variation is with the brand of alternator fitted.



I know that the alternator that Lotus fitted for many years was made by Valeo.

Many of us have replaced the Valeo alternators with Bosch units.

I've seen Motorola alternators as factory fitment on other S4s's.

Finally, the '83 belonging to JennasEspritTurbo has a non-Valeo alternator (couldn't read the brand).

Atwell Haines
'88 Esprit
Succasunna, NJ USA


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post #158 of 208 (permalink) Old 08-24-2016, 04:14 AM
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Quote:
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^^^ Perhaps the variation is with the brand of alternator fitted.


Finally, the '83 belonging to JennasEspritTurbo has a non-Valeo alternator (couldn't read the brand).
Its top secret very very hush hush national security stuff. Its under the If I tell you clause.
I will try to get a id tag off it.

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post #159 of 208 (permalink) Old 02-10-2017, 09:13 AM
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Hi,

Just getting around to installing mine but was going to get it powder coated first.

Anyone in the states know a paint number to match the intake or a spray can that does?

Thanks,
Rich
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post #160 of 208 (permalink) Old 02-10-2017, 09:21 AM
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Question

Quote:
Originally Posted by MRDANGERUS View Post
Rich,

Go for 40mm, even 44mm-that will give you 355mm runners. (1.3" dimension on the picture should be 55mm)
The plenum plate holes (ID) were precision ground and stack OD was slightly reduced for tight press-fit. I have used Rocksett engineering adhesive (Cotronics Resbond 907GF adhesive can also be used) to secure parts (hopefully forever, LOL)
Cotronics Resbond 907GF 2300°F Adhesive and Sealant - 11 oz Tube at SkyGeek.com
Mr Dangerous,

If I remember correctly, steel and aluminum corrode when touching each other over time. Do you know if this adhesive would prevent that?

Thanks,
Rich
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