C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Spreader bar clearance

Thread Tools
 
Search this Thread
 
Old Sep 9, 2022 | 04:50 PM
  #1  
Cmurray79's Avatar
Cmurray79
Thread Starter
Racer
 
Joined: Jan 2020
Posts: 388
Likes: 117
From: Tacoma, Wa
Default Spreader bar clearance

How much clearance do I need between the fan and the spreader bar, right now I have a little less than 1/4th inch on each side. This is with the front end lifted in the air. Seems pretty tight to me compared to other threads.



Last edited by Cmurray79; Sep 9, 2022 at 04:57 PM.
Reply
Old Sep 9, 2022 | 07:19 PM
  #2  
kodpkd's Avatar
kodpkd
Le Mans Master
Active Streak: 30 Days
Community Builder
Community Influencer
Top Answer: 1
 
Joined: Jun 2019
Posts: 5,545
Likes: 2,221
From: Loveland
Default

Do you race your car? Is your frame compromised?
Reply
Old Sep 9, 2022 | 07:55 PM
  #3  
Mooser's Avatar
Mooser
Race Director
10 Year Member
 
Joined: Apr 2011
Posts: 11,183
Likes: 3,336
From: North of Toronto - Ontario
Default

In theory the fan should pull away from the bar if anything, that said it looks like you've got some thread left and could add a shim (1/8?) to the fan to help the clearance
M
Reply
Old Sep 9, 2022 | 08:20 PM
  #4  
interpon's Avatar
interpon
Le Mans Master
Supporting Member
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: Jun 2019
Posts: 7,680
Likes: 2,482
From: Indiana
Default

My hats off to you..
I couldn’t do it..in theory it fits but most have electric fans. And with ac and belt guards..my hats off as it is tight.
https://www.corvetteforum.com/forums...t-guard-2.html
Reply
Old Sep 9, 2022 | 11:39 PM
  #5  
PeteZO6's Avatar
PeteZO6
Drifting
15 Year Member
Veteran: Air Force
Liked
Community Favorite
 
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
Default

I think you’re good. My PS pump has two belt groves, which limited how far back I could mount the spreader bar. The fan would occasionally kiss the spreader bar with a little “ting”. I put a 1/8” spacer behind the fan clutch. Problem solved.
http://www.myruffhouse.com/1969_corv...Spreader%20Bar
Reply
Old Sep 10, 2022 | 12:14 AM
  #6  
Bikespace's Avatar
Bikespace
Race Director
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Mar 2017
Posts: 11,978
Likes: 4,528
From: Virginia
Default

Switch to electric fans, and never look back.

In the meantime, solid motor mounts?
Reply
Old Sep 10, 2022 | 08:43 AM
  #7  
7t9l82's Avatar
7t9l82
Le Mans Master
15 Year Member
Conversation Starter
Photogenic
Community Favorite
 
Joined: Oct 2010
Posts: 6,952
Likes: 858
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Default

You should be. Fine check it with the car on the ground
Reply
Old Sep 10, 2022 | 11:12 AM
  #8  
carriljc's Avatar
carriljc
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 6,753
Likes: 1,393
Default

That would a be a little tight for my liking. As mentioned above; check it on the ground, and if then, if still that tight, then space the fan forward a skosh. How close is it to the underside of that pulley?


Originally Posted by Cmurray79
How much clearance do I need between the fan and the spreader bar, right now I have a little less than 1/4th inch on each side. This is with the front end lifted in the air. Seems pretty tight to me compared to other threads.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Corvettes to Drive Before You Die!

 Joe Kucinski
story-1

Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years

 Joe Kucinski
story-2

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-3

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-4

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-5

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-6

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-7

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-8

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-9

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
Old Sep 10, 2022 | 02:31 PM
  #9  
7t9l82's Avatar
7t9l82
Le Mans Master
15 Year Member
Conversation Starter
Photogenic
Community Favorite
 
Joined: Oct 2010
Posts: 6,952
Likes: 858
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Default

Are you sure the bracket isn't backwards?
Reply
Old Sep 10, 2022 | 02:54 PM
  #10  
PeteZO6's Avatar
PeteZO6
Drifting
15 Year Member
Veteran: Air Force
Liked
Community Favorite
 
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
Default

Originally Posted by 7t9l82
Are you sure the bracket isn't backwards?
I’m pretty sure they are on correctly. If you scroll down in the link I provided, you’ll see the brackets are symmetrical. There is no long or short side.
Reply
Old Sep 10, 2022 | 03:05 PM
  #11  
7t9l82's Avatar
7t9l82
Le Mans Master
15 Year Member
Conversation Starter
Photogenic
Community Favorite
 
Joined: Oct 2010
Posts: 6,952
Likes: 858
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Default

I have the same bar I'll. Have to look at mine
Reply
Old Sep 10, 2022 | 03:46 PM
  #12  
augiedoggy's Avatar
augiedoggy
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2007
Posts: 5,047
Likes: 1,125
From: North tonawanda NY
Default

Originally Posted by kodpkd
Do you race your car? Is your frame compromised?
There is a lot of flex in the c3 frame and this bar makes a noticeable improvement even with street driving.

Mine fits fine but I upgraded to electric fans last year.
Reply
Old Sep 10, 2022 | 04:29 PM
  #13  
calwldlife's Avatar
calwldlife
Team Owner
15 Year Member
Loved
Community Favorite
Top Answer: 1
 
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
Default

mine is so close, I can't change a fan belt.
Reply
Old Sep 10, 2022 | 05:01 PM
  #14  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,784
Likes: 2,598
Default

I added a thin spacer because I had contact.
Reply
Old Sep 10, 2022 | 06:07 PM
  #15  
sunflower 1972's Avatar
sunflower 1972
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Sep 2016
Posts: 2,246
Likes: 992
From: Wauconda IL
Default

Here's an old photo of mine. I have maybe 1/8" - 3/16" between the fan and bar. No problems at all and I've had mine on since 2016. No modifications at all.

Reply
Old Sep 10, 2022 | 09:19 PM
  #16  
Kerschmolar's Avatar
Kerschmolar
Pro
Supporting Lifetime
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Nov 2019
Posts: 648
Likes: 353
From: Portland, Oregon
Default

If your spreader bar doesn’t already have slotted mounting holes, you could enlong them a bit to allow for front to back adjustment. Spacers on the fan mount as mentioned above sounds good too. Couldn’t find a picture of the actual mounting holes on mine.


Charlie
Reply
Old Sep 11, 2022 | 12:56 AM
  #17  
4-vettes's Avatar
4-vettes
Race Director
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Nov 2006
Posts: 13,335
Likes: 7,903
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Default

When accelerating, the engine lifts up and to the right. Forward/aft motion is near nothing. 1/4 inch clearance should be fine.
Reply

Get notified of new replies

To Spreader bar clearance

Old Sep 11, 2022 | 11:14 AM
  #18  
Eric P's Avatar
Eric P
Drifting
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2019
Posts: 1,515
Likes: 499
Default

My spreader bar is just like that and never touches
Reply
Old Sep 11, 2022 | 01:35 PM
  #19  
John Vance's Avatar
John Vance
Instructor
 
Joined: Jun 2018
Posts: 108
Likes: 17
From: Blue springs mo.
Default 1979 spreader bar?

Dumb question I geuss. Why are you installing the spreader bar?
Reply
Old Sep 11, 2022 | 04:58 PM
  #20  
4-vettes's Avatar
4-vettes
Race Director
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Nov 2006
Posts: 13,335
Likes: 7,903
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Default

Because Spreader bars really make a difference.
I would have to honestly say that the Spreader bar is the best bang for the buck of all the modifications I have done to my car. Very little money for a difference you can really feel.
Very noticeable in a S turn situation. Takes a huge amount of flex out.
Reply



All times are GMT -4. The time now is 10:36 AM.

story-0
10 Corvettes to Drive Before You Die!

Slideshow: 10 Corvettes to drive before you die.

By Joe Kucinski | 2026-06-23 08:31:12


VIEW MORE
story-1
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years

Slideshow: Corvette and Porsche 911, how two icons conquered the last 25 years.

By Joe Kucinski | 2026-06-23 08:18:33


VIEW MORE
story-2
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-3
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-4
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-5
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-6
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-7
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-8
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-9
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