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

Throttle body clearance issue....HELP!!!!

Thread Tools
 
Search this Thread
 
Old Jan 10, 2006 | 12:46 AM
  #1  
Billdavis83's Avatar
Billdavis83
Thread Starter
Advanced
20 Year Member
 
Joined: Oct 2004
Posts: 82
Likes: 0
Default Throttle body clearance issue....HELP!!!!

I got an intake made from a fellow forum member. I was installing it on my car this weekend to test fit everything. I bolted the plenum to the top of the carb mounting, then tried to bolt on the throttle body. The throttle body interferes with the thermostat housing and the bolts are about a quarter to a half inch from lining up. Is there anything I can do about this???
Reply
Old Jan 10, 2006 | 12:51 AM
  #2  
Aggravated4life's Avatar
Aggravated4life
Race Director
10 Year Member
 
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Default

Originally Posted by Billdavis83
I got an intake made from a fellow forum member. I was installing it on my car this weekend to test fit everything. I bolted the plenum to the top of the carb mounting, then tried to bolt on the throttle body. The throttle body interferes with the thermostat housing and the bolts are about a quarter to a half inch from lining up. Is there anything I can do about this???
Have NO idea what your explaining..you got pics?
Reply
Old Jan 10, 2006 | 12:57 AM
  #3  
Billdavis83's Avatar
Billdavis83
Thread Starter
Advanced
20 Year Member
 
Joined: Oct 2004
Posts: 82
Likes: 0
Default

Unfortunately no, the car is back home and I am at school. The bottom of the IAC housing hits the top of the thermostat housing, so the holes that bolt it to the plenum don't line up.
Reply
Old Jan 10, 2006 | 01:17 AM
  #4  
rodj's Avatar
rodj
Le Mans Master
25 Year Member
 
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Default

"I got an intake made from a fellow forum member"

More info?
What manifold?

"I bolted the plenum to the top of the carb mounting"/
Is this a carb manifold adated to EFI?
If the TB is too low then maybe someone screwed up when they made it.
Could possibly use a carb spacer to raise plenum if this is the case.
Reply
Old Jan 10, 2006 | 08:03 AM
  #5  
mseven's Avatar
mseven
Le Mans Master
 
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Default

What manifold ? It sounds almost like you are descibing a single plane set-up. If it is, I seem to remember jburnett using a spacer in there.
So I am not sure what you mean, are you sure it is the IAC ? but if you are talking about the part of the TB that is touching, is the coolant line area to the side of the IAC. then it may have been set-up fot that to be deleted. On a mini ram there is not enough room so I have those cut-off entirely and the only thing left down there on the TB is the iac and the part of the casting that encapsulates the IAC. That's what was necessary to clear thermostat housing.

Last edited by mseven; Jan 10, 2006 at 08:09 AM.
Reply
Old Jan 10, 2006 | 08:26 AM
  #6  
AGENT 86's Avatar
AGENT 86
Team Owner
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Jan 2003
Posts: 20,315
Likes: 245
From: Summerland B.C. Canada
Default

Like this Mick
Reply
Old Jan 10, 2006 | 08:43 AM
  #7  
mseven's Avatar
mseven
Le Mans Master
 
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Default

Yeah that's it... I finally have a digi cam now , (gift) but part is on and a bit hard to see.
Dan, you as always have some great shots to go along w/description! How's your part hunting/p.coating and project going?
Reply
Old Jan 10, 2006 | 09:01 AM
  #8  
AGENT 86's Avatar
AGENT 86
Team Owner
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Jan 2003
Posts: 20,315
Likes: 245
From: Summerland B.C. Canada
Default

Originally Posted by mseven
Yeah that's it... I finally have a digi cam now , (gift) but part is on and a bit hard to see.
Dan, you as always have some great shots to go along w/description! How's your part hunting/p.coating and project going?
Too f'n slow. I'm still working on the "honey do list"
This list has grown over the last 3 years due to some yellow thing in the driveway
I'm hoping to get going full tilt in feb.
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 Jan 10, 2006 | 09:05 AM
  #9  
Billdavis83's Avatar
Billdavis83
Thread Starter
Advanced
20 Year Member
 
Joined: Oct 2004
Posts: 82
Likes: 0
Default

Yeah, Burnett made my intake, from a super victor. I am not sure there is enough hood clearance to run a carb spacer under the plenum. I thought it was the bottom bulge on the IAC housing that was touching, but I could be wrong. What all do you have to do to eliminate the coolant line area?
Reply
Old Jan 10, 2006 | 09:21 AM
  #10  
mseven's Avatar
mseven
Le Mans Master
 
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Default

First of I would contact him about the spacer I am sure he knows hood clearances to a TEE ! I thought he was using about a 3/8' spacer or so.
To answer your question the mod. is easy, I cut it w/a grinding wheel, a dremel, w/some cut off discs (roughed it in) and them finished the edge w/ a sanding drum (dremel part). tape up the IAC as to not get crud in there and still flush it out when you are done w/TB cleaner.
Agent 86 posted a nice clear shot of what it will look like when finished. Take a felt tip and mark were you are cutting (to make sure you leave that ridge for gasket sealing cutting some of it from the bottom helps) You will be only leaving the area underneath for gasket sealing (embossed line that you will see) when you have it cut and finished to your liking, then trace part on new gasket. trimming away the extra part of gasket not being used any more. Of course Now you will have to run the coolant line direct to the intake now (simple mod), so intake will only have one heater hose and one upper rad .hose.
Reply
Old Jan 14, 2006 | 06:09 PM
  #11  
Billdavis83's Avatar
Billdavis83
Thread Starter
Advanced
20 Year Member
 
Joined: Oct 2004
Posts: 82
Likes: 0
Default

Ok, trimmed down the IAC housing. Still hits. Where can I buy a 3/8" spacer? All I can seem to find are inch and bigger.
Reply
Old Jan 14, 2006 | 06:26 PM
  #12  
JrRifleCoach's Avatar
JrRifleCoach
Team Owner
20 Year Member
Veteran: Navy
St. Jude 20 Year Donor
Liked
 
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Default

Originally Posted by AGENT 86
Like this Mick
Dude, your pics are prettier than your car!
Reply
Old Jan 14, 2006 | 06:28 PM
  #13  
mseven's Avatar
mseven
Le Mans Master
 
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Default

I would contact jburnett, aside from making your intake I am sure (judging from the work I have seen him post) he can make you one that will work on your intake, including hood clearance.
Reply
Old Jan 14, 2006 | 08:13 PM
  #14  
Billdavis83's Avatar
Billdavis83
Thread Starter
Advanced
20 Year Member
 
Joined: Oct 2004
Posts: 82
Likes: 0
Default

Originally Posted by mseven
I would contact jburnett, aside from making your intake I am sure (judging from the work I have seen him post) he can make you one that will work on your intake, including hood clearance.

Yeah, I don't think Jeb would be too excited to hear from me. This is the third time I've put on one of his intakes, because the last 2 times they leaked coolant pretty badly. Been about 4 months since we've spoken and he seemed a little annoyed, as I recall.
Reply
Old Jan 14, 2006 | 08:21 PM
  #15  
mseven's Avatar
mseven
Le Mans Master
 
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Default

In that case maybe a standard 4bbl. spacer can be used as a starting point (provided he did not modify the carb mounting area for the plenum), and some whittleling or some from a machine shop.
If not only choice would be getting a machine shop to fab you one up base on the plenum for fit (I am guessing intake is on the car)
Reply
Old Jan 14, 2006 | 11:41 PM
  #16  
85vet's Avatar
85vet
Melting Slicks
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Default

I went with a carberator wedge plate.
http://store.summitracing.com/defaul...=egnsearch.asp

We have plenty of clarence in the back of the intake and it gave me extra clarence in front. You can check hood clarence issue with bolting it on and useing good old fashon playdoh on top of the intake - close hood and it will give you how much clarence you have when it flattens out.

I did have the wedge welded to my plenum.

PS - I had a few leaks and had a local welder take care of them. The welder said that it was not uncommon with aluminum welds and was impressed with the amount of modification.

Last edited by 85vet; Jan 14, 2006 at 11:43 PM.
Reply
Old Jan 16, 2006 | 07:58 PM
  #17  
Billdavis83's Avatar
Billdavis83
Thread Starter
Advanced
20 Year Member
 
Joined: Oct 2004
Posts: 82
Likes: 0
Default

Originally Posted by 85vet
I went with a carberator wedge plate.
http://store.summitracing.com/defaul...=egnsearch.asp

We have plenty of clarence in the back of the intake and it gave me extra clarence in front. You can check hood clarence issue with bolting it on and useing good old fashon playdoh on top of the intake - close hood and it will give you how much clarence you have when it flattens out.

I did have the wedge welded to my plenum.

Do you know what degree wedge spacer you used?
Reply

Get notified of new replies

To Throttle body clearance issue....HELP!!!!

Old Jan 16, 2006 | 10:59 PM
  #18  
85vet's Avatar
85vet
Melting Slicks
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Default

Originally Posted by Billdavis83
Do you know what degree wedge spacer you used?
http://www.jegs.com/webapp/wcs/store...tegoryId=21843

part # 710-65030 (jegs)
5 degree, but we tried quite a few to find the correct one. You might need a flat one and the wedge to lift the front up.

Another item #350-9265 might help.

Last edited by 85vet; Jan 16, 2006 at 11:02 PM.
Reply
Old Jan 16, 2006 | 11:36 PM
  #19  
CentralCoaster's Avatar
CentralCoaster
Team Owner
 
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Default

I would just smash the tstat housing down a bit, and if it cracks, tig weld it.
Reply
Old Jan 17, 2006 | 12:23 AM
  #20  
REDC4CORVETTE's Avatar
REDC4CORVETTE
Safety Car
10 Year Member
 
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Default

I don't know what year or anything on your car ,you didn't include that info.
I know eather mid america or Elkerts or one of those companys have a plate about 1/2 inch in width and that might help to clear the stat.
I know the early style throttle body like and 86 may clear?
Reply



All times are GMT -4. The time now is 05:52 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