C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

TPI plenum extension Dist cover hitting hood

Thread Tools
 
Search this Thread
 
Old Apr 27, 2014 | 10:11 PM
  #1  
BOOT77's Avatar
BOOT77
Thread Starter
Melting Slicks
10 Year Member
 
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Default TPI plenum extension Dist cover hitting hood

Figured I'd ask a few questions since I got a night too sleep on a solution. Is it a common problem for the TPI plenum extension/Distributor cover too hit or rub the hood? I haven't had it running since I notice, maybe a sign of bad motor mounts?

Looks like I'm gonna have too cut the hood some or take a chance of dropping the hood and taking out my external coil dust cover. Any metal support bracing round there?

FYI the plenum extension isn't going back on.







Reply
Old Apr 27, 2014 | 10:18 PM
  #2  
cohocarl's Avatar
cohocarl
Burning Brakes
20 Year Member
 
Joined: Jun 2000
Posts: 865
Likes: 6
From: Auburn Michigan
Default

Originally Posted by BOOT77
Is it a common problem for the TPI plenum extension/Distributor cover too hit or rub the hood? I haven't had it running since I notice, maybe a sign of bad motor mounts?
Please disregard the green circles in the pic, but you can see my '85's rubbed...

Reply
Old Apr 27, 2014 | 10:21 PM
  #3  
volkswagens-for-life's Avatar
volkswagens-for-life
Melting Slicks
 
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
Default

WTF is up w/ the plenum extension?
Reply
Old Apr 28, 2014 | 03:01 AM
  #4  
65Z01's Avatar
65Z01
Team Owner
20 Year Member
 
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Default

Looks like that Lt Blue plug atop the dist cap is way too tall???

Show a pic with the plenum extension laying in the proper position, even it it won't bolt down.
Reply
Old Apr 28, 2014 | 03:19 AM
  #5  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

What is that gray thing attached to the top of your distributor cap? It looks like you have a remote coil.

My guess is that the gray thing is sticking up too high and raising the plenum extension up enough to hit the hood. You could cut off the top part from the groove upwards. That appears to be similar to the old spark plug wire retainer (I just threw mine away because I haven't had a spark plug wire set where the boots had that thing on top)
Reply
Old Apr 28, 2014 | 10:45 AM
  #6  
BOOT77's Avatar
BOOT77
Thread Starter
Melting Slicks
10 Year Member
 
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Default

It's an external coil and I have not shut the hood since it's install and do not plan on reinstalling the cover. I was doing a tune-up and deleting some junk on my new car and noticed the marks on the hood. Looks like I'll have too cut the hood.



Reply
Old Apr 28, 2014 | 11:18 AM
  #7  
c4cruiser's Avatar
c4cruiser
Team Owner
20 Year Member
Veteran: Army
 
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Default

My '87 has the same marks from the distributor cover. The plug wires I have (Taylor 8mm) fit easily under the stock cover.

That boot for the external coil wire certainly looks very tall and the OEM cover can't be used with it. Given that the coil wire cover is rubber, it may flatten somewhat with the hood closed. You may have to cut the hood if the back of the hood doesn't touch the hood seal. In the pic, the boots looks like it sits higher than the seal.
Reply
Old Apr 28, 2014 | 11:57 AM
  #8  
LongBeachC4's Avatar
LongBeachC4
Racer
 
Joined: Jun 2012
Posts: 343
Likes: 9
From: Long Beach Ca,
Default

The remote coil set up can't work with the cover, it's way to tall. Either loose the remote coil and go with an internal coil like MSD or Pertronixs or don't use the cover and hope the hood is not hitting the coil boot. I run a MSD extreme cap with a Pertronix coil and ignition module and it works just fine.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Apr 28, 2014 | 12:39 PM
  #9  
corvetteronw's Avatar
corvetteronw
Race Director
Supporting Lifetime
20 Year Member
Veteran: Army
St. Jude 10 Year Donor
Liked
 
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Default

http://www.parts123.com/parts123/yb....5Z50000050F~~~
Reply
Old Apr 28, 2014 | 12:50 PM
  #10  
BOOT77's Avatar
BOOT77
Thread Starter
Melting Slicks
10 Year Member
 
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Default

Originally Posted by corvetteronw
I had no intention of reinstalling the cover, but it is good to know that part is available if I change my mind some day. Also I may attempt too trim mine, but looks are low priority atm. The car needs a lot maintenance and upgrades if I want too race it soon.
Reply
Old Apr 28, 2014 | 02:24 PM
  #11  
volkswagens-for-life's Avatar
volkswagens-for-life
Melting Slicks
 
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
Default

I was wondering whats up w/ the coil as well.

But nobody can explain what this plenum extension is?
Reply
Old Apr 28, 2014 | 02:30 PM
  #12  
cohocarl's Avatar
cohocarl
Burning Brakes
20 Year Member
 
Joined: Jun 2000
Posts: 865
Likes: 6
From: Auburn Michigan
Default

Originally Posted by volkswagens-for-life
But nobody can explain what this plenum extension is?
No use other than cosmetic reasons to cover up the dizzy and make the tpi look perdy.
Reply
Old Apr 28, 2014 | 02:32 PM
  #13  
volkswagens-for-life's Avatar
volkswagens-for-life
Melting Slicks
 
Joined: Nov 2013
Posts: 2,264
Likes: 3
From: Orchard Park NY
Default

I'm an idiot. The way the OP had it in the second pic I thought it was something else. I now realize its just the piece that covers the dizzy lol
Reply
Old Apr 28, 2014 | 05:01 PM
  #14  
MavsAK's Avatar
MavsAK
Melting Slicks
 
Joined: Feb 2014
Posts: 2,409
Likes: 44
From: NC
Default

I'd cut the hood to make the cover fit.
Every little bit like that helps the C4 drop panties.
Reply

Get notified of new replies

To TPI plenum extension Dist cover hitting hood





All times are GMT -4. The time now is 06:19 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE