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

Raise car, lower car...? Header clearance.

Old 10-08-2003, 12:00 PM
  #1  
Shark Racer
Race Director
Support Corvetteforum!
Thread Starter
 
Shark Racer's Avatar
 
Member Since: Jan 2000
Location: San Jose CA
Posts: 12,399
Received 241 Likes on 200 Posts

Default Raise car, lower car...? Header clearance.

I've had an issue with header clearance since I installed my headers. I decided to order coil spring spacers from VBP. They were supposed to lift the car 1". tsw71 trimmed them down on the bandsaw to 5/8" and that should have been about the lift I got from them. However, when the car came down the lift was actually more like 1.25". IE Sickly stock appearing.

Now I'm trying to decide should I fight with it and get it to the actual raise I wanted, keep it at its current height(28.75" wheel lip), or just slam it back down like it was? I'm tempted to go with the slam and just deal with speed bumps as best I can... maybe someone on the forum can teach me how to make skid plates.

Of course, in the future I'll be going with AFR heads, which apparently have a higher exhaust port. Coupled with less weight on the nose(I lose about 1/8" clearance for every extra hundred pounds in the car, maybe more clearance on the nose), I'm thinking that it'd be fine slammed completely.

What do you guys think I should do?

-Steve
Old 10-08-2003, 12:08 PM
  #2  
VegasJen
CFOT Attention Whore

Support Corvetteforum!
 
VegasJen's Avatar
 
Member Since: Dec 2001
Location: Press "2" for English
Posts: 48,700
Received 79 Likes on 32 Posts

Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

hey steve, i had to vote for the clearance. as you know, my car is pretty low too. i don't have a problem scraping some stuff, but engine parts? i don't think engine parts need to be making contact with the ground.
Old 10-08-2003, 12:26 PM
  #3  
LFZ
Team Owner
 
LFZ's Avatar
 
Member Since: Feb 2003
Location: Lake Norman NC
Posts: 30,205
Received 310 Likes on 227 Posts

Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

my hookers sit really low...i never dragged them once, but also avoided situations where i could have dragged. lower the better.
Old 10-08-2003, 02:28 PM
  #4  
Chuck Harmon
Melting Slicks
 
Chuck Harmon's Avatar
 
Member Since: Apr 2000
Location: San Jose California
Posts: 3,286
Likes: 0
Received 5 Likes on 5 Posts

Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

Steve,

You are now experiencing one of the reasons why I went to side pipes. I really hate Vettes that sit high like a 4WD. The lower stance really makes the car. They handle better that way too. An advantage of the shorty headers is that they make almost as much power yet give you the same clearance a stock system would.

If you do jack up the front, you better raise the back by the same amount. This is pretty typical of any variation from stock. When you change one thing there is usually a consequence somewhere else. I have learned a lot about consequences!

Chuck
Old 10-08-2003, 05:50 PM
  #5  
tsw71
Drifting
 
tsw71's Avatar
 
Member Since: Mar 2001
Location: Indiana
Posts: 1,394
Likes: 0
Received 3 Likes on 3 Posts

Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

Since I'll likely be getting bloody knuckles and grease in my hair when dropping it back down, I'll have to vote to leave it the hell alone! :D :reddevil :D

Old 10-08-2003, 07:23 PM
  #6  
Shark Racer
Race Director
Support Corvetteforum!
Thread Starter
 
Shark Racer's Avatar
 
Member Since: Jan 2000
Location: San Jose CA
Posts: 12,399
Received 241 Likes on 200 Posts

Default Re: Raise car, lower car...? Header clearance. (tsw71)

Well Tom - it has dropped half an inch.

I went to get an ultrasound today. Will find out from the doctor what's going on with me...

-Steve

PS If I scrape when I go over a speed bump @SCU, I think I'm DEFINITELY going to just slam it back down! :D
Old 10-08-2003, 07:27 PM
  #7  
timbo79
Burning Brakes
 
timbo79's Avatar
 
Member Since: Sep 2002
Location: SF East Bay CA
Posts: 1,179
Received 3 Likes on 3 Posts

Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

Bring it back down: I lowered mine and YES, I am careful on speedbumps, BUT I also got some Sanderson Headers which have a higher collector than before, so now no scrapes unless I race over the bumps.... Good Luck
Old 10-08-2003, 09:47 PM
  #8  
74 vert
Melting Slicks
 
74 vert's Avatar
 
Member Since: Jan 2003
Location: Where are the Smoky Mountain Cruisers? Not Correctly Restored Stingray
Posts: 2,165
Received 8 Likes on 7 Posts

Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

My car has VBP 460 coils now. I think the front is about 28 inches. I like the feel of the rebuild front. I have not tried a speed bump yet, but I don't think the speed bumps will be a problem with my hookers as they are sidepipes.

Good luck.
Old 10-08-2003, 09:56 PM
  #9  
PRESSURERAT
Pro
 
PRESSURERAT's Avatar
 
Member Since: Oct 2003
Location: I'm bleeding, making me the victor!
Posts: 565
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

Man, you're not living untill those collectors ocasionally scrape the pavement!!!!!!!! :reddevil
Old 10-08-2003, 10:52 PM
  #10  
fireball
Racer
 
fireball's Avatar
 
Member Since: Mar 2001
Location: Ellicott City MD
Posts: 372
Likes: 0
Received 1 Like on 1 Post
Default Re: Raise car, lower car...? Header clearance. (Pacin'California)

I used to scrape headers all the time. My problem wasn't clearance, it was soft springs. Once I put stiff springs and good shocks on, I had no more scraping.
Old 10-09-2003, 12:39 AM
  #11  
Shark Racer
Race Director
Support Corvetteforum!
Thread Starter
 
Shark Racer's Avatar
 
Member Since: Jan 2000
Location: San Jose CA
Posts: 12,399
Received 241 Likes on 200 Posts

Default Re: Raise car, lower car...? Header clearance. (fireball)

My problem is definitely not soft springs and is definitely clearance. I walked the car over a bump, no scraping. Then let it roll forward ever so slightly.
*ksh*

It scraped, JUST BARELY, in two spots. I think the BEST solution is aluminum heads with higher exhaust ports. Less weight so the car naturally sits higher, lower center of gravity because the weight at a higher point from the bottom of the car ahs been removed, more power, and more clearance! :D

Anyone got $1200 they'd like to donate?

-Steve

Get notified of new replies

To Raise car, lower car...? Header clearance.



Thread Tools
Search this Thread
Quick Reply: Raise car, lower car...? Header clearance.



All times are GMT -4. The time now is 09:48 PM.