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

Engine Lowering?

Thread Tools
 
Search this Thread
 
Old Sep 21, 2004 | 03:24 PM
  #1  
69L71's Avatar
69L71
Thread Starter
Drifting
20 Year Member
 
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Default Engine Lowering?

With hood clearance being a recurring C3 concern (unless you like L88 Hoods), I was wondering if anyone has looked into lowering the engine in their engine compartment. I watched Troy Trepanier do this on the eBay Mustang and it didn't seem too bad. Aside from a little creative engineering on the engine mounts and some ground clearance concerns, it seems to me that lowering an inch wouldn't be too hard and would open up intake manifold options pretty extensively and keep a stealthy persona.

Has anyone tried this?
Reply
Old Sep 21, 2004 | 03:31 PM
  #2  
LIQUIDDRAGON's Avatar
LIQUIDDRAGON
Melting Slicks
 
Joined: Aug 2004
Posts: 2,063
Likes: 1
From: Beverly Massachusetts
Default

what about ground clearance on the oil pan and clearance for the crossmember under the oil pan? there are more options for hoods besides the L88 which i dont like IMHO but that is just me and that is why i went wiith a high rise hood but like i always say to each his own.
Reply
Old Sep 21, 2004 | 03:37 PM
  #3  
69L71's Avatar
69L71
Thread Starter
Drifting
20 Year Member
 
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Default

Its all a matter of preference. I don't particularly like the L88 or aftermarket hoods. Too batmobile for me. I like a stock, sleeper look. On a SB car I'd consider a BB hood, but that doesn't buy too much and it still raises eyebrows.

Obviously, whatever you do to lower the engine you need to account for with a low-profile oil pan and pickup. But that's not visible when you lift the hood.
Reply
Old Sep 21, 2004 | 05:37 PM
  #4  
Red_Shift's Avatar
Red_Shift
Racer
10 Year Member
 
Joined: Jul 2004
Posts: 420
Likes: 1
From: Lapeer MI
Default

Besides lowering the center of gravity your engine wouldn't stick out so high. Sounds like a win/win situation. I've thought about this before, and when I go BB I'll look into it. Surprised no one has chimed in yet.
Reply
Old Sep 21, 2004 | 05:57 PM
  #5  
joe73vette's Avatar
joe73vette
Melting Slicks
 
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Default

You'd have to chop out the crossmember where the dampener and pulleys are, and should change the differential angle to match the u-joints. Joe
Reply
Old Sep 21, 2004 | 05:59 PM
  #6  
Corz's Avatar
Corz
Team Owner
20 Year Member
 
Joined: Sep 2001
Posts: 30,958
Likes: 0
From: Middletown Connecticut
Cruise-In IV Veteran
Default

it's a lot harder then you think..

everything behind the engine will have to be modified to compensate for the different angle
Reply
Old Sep 21, 2004 | 06:12 PM
  #7  
Kim72's Avatar
Kim72
Pro
15 Year Member
 
Joined: Oct 2000
Posts: 558
Likes: 22
From: Vancouver, B.C., Canada
Default

I have a 454 with Headman headers. I'ts the headers that hits the speed bumps in the parking lots. Maybe other brands are different.
Reply
Old Sep 21, 2004 | 07:21 PM
  #8  
71coupe's Avatar
71coupe
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jun 2001
Posts: 2,429
Likes: 14
From: CA
Default

I've brought this up before here. I think it's a great idea, but it would be a big job. In addition to lowering it, you could also move it to the right a little for weight distribution. May also be able to move it back more too.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old Sep 21, 2004 | 07:30 PM
  #9  
lostpatrolman's Avatar
lostpatrolman
Melting Slicks
10 Year Member
 
Joined: Feb 2004
Posts: 2,435
Likes: 0
From: largo florida
Default

1.5 inches toward the drivers side right?
Reply
Old Sep 21, 2004 | 07:47 PM
  #10  
71coupe's Avatar
71coupe
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jun 2001
Posts: 2,429
Likes: 14
From: CA
Default

No - passenger side. This would compesate for the drivers weight to "ballance" the car better.

Check out this link:
http://www.442.com/articles/articles.html
Click on "other articles" at top, then click on "72 Ols Banshee desert racer" at bottom of page. This was James Garrners other race car.
The engine was set back 27" & right next to driver for better flying.
Cool piece of Olds history.

Last edited by 71coupe; Sep 21, 2004 at 07:54 PM.
Reply
Old Sep 21, 2004 | 07:49 PM
  #11  
lostpatrolman's Avatar
lostpatrolman
Melting Slicks
10 Year Member
 
Joined: Feb 2004
Posts: 2,435
Likes: 0
From: largo florida
Default

The engine already sits 1.5 inches off center toward the pass side.
Reply
Old Sep 21, 2004 | 07:52 PM
  #12  
Z-man's Avatar
Z-man
Race Director
25 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
Default

If your dates are slimness-challenged, you don't want to move that engine any more to the passenger side...
Reply
Old Sep 22, 2004 | 08:37 AM
  #13  
69L71's Avatar
69L71
Thread Starter
Drifting
20 Year Member
 
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Default

I can see the crossmember being a challenge. The damper tucks in there pretty close. I don't think I'd sweat the driveshaft geometry too much. Lowering the engine would cause rotation about the rear trans mount, which is only about 4 inches from the rear yoke. An inch down in the front would only be about 1/10" rise in the rear. That's a VERY small angular change in driveshaft angle. I think the U-joints could handle that.
Reply
Old Sep 22, 2004 | 11:32 AM
  #14  
Schmucker's Avatar
Schmucker
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: May 2002
Posts: 2,508
Likes: 0
From: Wisconsin
Default

Originally Posted by 69L71
I can see the crossmember being a challenge. The damper tucks in there pretty close. I don't think I'd sweat the driveshaft geometry too much. Lowering the engine would cause rotation about the rear trans mount, which is only about 4 inches from the rear yoke. An inch down in the front would only be about 1/10" rise in the rear. That's a VERY small angular change in driveshaft angle. I think the U-joints could handle that.
But having the correct pinion angle helps reduce horsepower loss in the driveshaft. With my coilover setup I have the rear end on a pivot and can change the pinion angle easily with just some shims on the front, but only lower it. I have it tucked up as high as possible under the car for better half shaft geometry with the suspension lowered. I've thought about lowering the engine down as well, but I like the look of the L88 hood so I don't care.
Reply
Old Sep 22, 2004 | 12:17 PM
  #15  
LiveandLetDrive's Avatar
LiveandLetDrive
Melting Slicks
20 Year Member
All Eyes On Me
Photogenic
Liked
 
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
Default

Maybe I missed it, but I think you guys are forgetting the steering linkage. You can't just lower that, without throwing off the whole geometry... but really it needs help anyway, so why not throw that in the "while I'm at it" bin with the rest

-Chris
Reply
Old Sep 22, 2004 | 01:26 PM
  #16  
lostpatrolman's Avatar
lostpatrolman
Melting Slicks
10 Year Member
 
Joined: Feb 2004
Posts: 2,435
Likes: 0
From: largo florida
Default

looks like there is 1.5 inches of clearance for that.
Reply
Old Sep 22, 2004 | 08:34 PM
  #17  
LiveandLetDrive's Avatar
LiveandLetDrive
Melting Slicks
20 Year Member
All Eyes On Me
Photogenic
Liked
 
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
Default

full travel?
Reply

Get notified of new replies

To Engine Lowering?

Old Sep 22, 2004 | 08:44 PM
  #18  
LiveandLetDrive's Avatar
LiveandLetDrive
Melting Slicks
20 Year Member
All Eyes On Me
Photogenic
Liked
 
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
Default

full travel?
Reply
Old Sep 22, 2004 | 09:03 PM
  #19  
lostpatrolman's Avatar
lostpatrolman
Melting Slicks
10 Year Member
 
Joined: Feb 2004
Posts: 2,435
Likes: 0
From: largo florida
Default

hehe, not sure. I dont think the steering moves too far up and down through its travel. Someone should look
Reply
Old Sep 22, 2004 | 10:24 PM
  #20  
LiveandLetDrive's Avatar
LiveandLetDrive
Melting Slicks
20 Year Member
All Eyes On Me
Photogenic
Liked
 
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
Default

I don't think it does either, but the inner tie rods get closer I believe. How close, I don't know...

-Chris
Reply




All times are GMT -4. The time now is 02:31 PM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE