Engine Mods Outrageous Builds, High-Horsepower Modifications, strokers, and big cams for the Corvette

what makes a stroker?>

Thread Tools
 
Search this Thread
 
Old Oct 3, 2002 | 01:47 AM
  #1  
OatBoy's Avatar
OatBoy
Thread Starter
Pro
 
Joined: Feb 2002
Posts: 500
Likes: 0
From: sebastopol ca
Default what makes a stroker?>

So, what does make a stroker? :rolleyes:
Reply
Old Oct 3, 2002 | 10:56 AM
  #2  
VetteRacer282's Avatar
VetteRacer282
Drifting
 
Joined: Nov 2000
Posts: 1,483
Likes: 0
From: Las Vegas Nevada
Default Re: what makes a stroker?> (OatBoy)

Changing the stroke of the engines crankshaft. Stock is 3.48" a 377/383 uses 3.75".

Thats the diameter of the circle the center of the rod journal(?) makes (so double the distance of the center of the main journals to the rod journals).

I just got off a LONG night at work, so I hope I explained that right...
Matt
Reply
Old Oct 4, 2002 | 10:09 PM
  #3  
chevrofreak's Avatar
chevrofreak
2nd Gear
10 Year Member
 
Joined: Oct 2002
Posts: 2
Likes: 0
From: Billings MT
Default Re: what makes a stroker?> (VetteRacer282)



its a bad depiction of a 350 crank, but it gives you an idea
Reply
Old Oct 5, 2002 | 06:30 PM
  #4  
OatBoy's Avatar
OatBoy
Thread Starter
Pro
 
Joined: Feb 2002
Posts: 500
Likes: 0
From: sebastopol ca
Default Re: what makes a stroker?> (chevrofreak)

so does a 383 have a higher compression ratio than a 350 then?> usually speaking i guess?>
Reply
Old Oct 5, 2002 | 06:37 PM
  #5  
LD85's Avatar
LD85
Race Director
25 Year Member
 
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Default Re: what makes a stroker?> (OatBoy)

http://www.geocities.com/MotorCity/7610/dyno.htm

Reply
Old Oct 5, 2002 | 08:39 PM
  #6  
VetteRacer282's Avatar
VetteRacer282
Drifting
 
Joined: Nov 2000
Posts: 1,483
Likes: 0
From: Las Vegas Nevada
Default Re: what makes a stroker?> (OatBoy)

so does a 383 have a higher compression ratio than a 350 then?> usually speaking i guess?>
Compression ratio all depends on the pistons you put in it. You can get high compression or low compression pistons if you wanted.

Matt
Reply
Old Oct 6, 2002 | 01:17 AM
  #7  
vader86's Avatar
vader86
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2001
Posts: 62,154
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Default Re: what makes a stroker?> (OatBoy)

so does a 383 have a higher compression ratio than a 350 then?> usually speaking i guess?>
not really, it depends on the piston you select, and the combustion chamber of the head, and the gasket thickness for the most part

For example, if i use a Felpro gasket of .038" thickness, and a 68cc AFR 190 head, i would select what type of piston i wanted to put my compression at around 10-10.5:1 so i could run pump gas.
Reply
Old Oct 6, 2002 | 03:57 AM
  #8  
Vetterodder's Avatar
Vetterodder
Safety Car
25 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Active Streak: 90 Days
 
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Default Re: what makes a stroker?> (OatBoy)

so does a 383 have a higher compression ratio than a 350 then?> usually speaking i guess?>
Yes. With everything else being equal, the larger displacement will result in a higher cr. CR is the relationship between the cylinder volume at BDTC and at TDC. Increasing the bore by .03" increases the volume of the combuston chamber but the increasing the stroke from .348" to 3.75" increases the total cylinder volume by a greater amount. The end result is a higher cr. That's why dished pistons are readily available for 383's. The chamber volume of the heads also a major factor. Generally smaller chambers are preferable, and a dished piston is usually better than a flat or domed pistion, but the results can vary. Ultimately, a combination that gives up a little hp in exchange for more reliability and driving pleasure will be the better choice.
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 Oct 8, 2002 | 07:58 PM
  #9  
OatBoy's Avatar
OatBoy
Thread Starter
Pro
 
Joined: Feb 2002
Posts: 500
Likes: 0
From: sebastopol ca
Default Re: what makes a stroker?> (Vetterodder)

but still, why do u call it a stroker, just cuz it's bored? or does the stroke have to be a specific amount, or do u increase stroke? is is a stroker just a bored engine
Reply
Old Oct 8, 2002 | 08:08 PM
  #10  
scorp508's Avatar
scorp508
Team Owner
Supporting Lifetime Gold
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Default

but still, why do u call it a stroker
Because you have lengthened the stroke compared to the original setup.

350ci engine = 4.00" bore, 3.48" stroke.
383ci engine = 4.03" bore, 3.75" stroke.
Reply
Old Oct 8, 2002 | 08:50 PM
  #11  
69stingray's Avatar
69stingray
Burning Brakes
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Oct 2001
Posts: 1,146
Likes: 0
From: Milford NH
Default Re: what makes a stroker?> (OatBoy)

I saw a kit to "de-stroke" a 350, why would someone want to do that? Doe sit put the power of the engine in a certain RPM range?
Reply
Old Oct 8, 2002 | 09:06 PM
  #12  
VetteRacer282's Avatar
VetteRacer282
Drifting
 
Joined: Nov 2000
Posts: 1,483
Likes: 0
From: Las Vegas Nevada
Default Re: what makes a stroker?> (69stingray)

Its called stroker because your changing the stroke of the engine.

a de-stroke kit is good for RPM's. A standard 377 (400 block, 350 crank) is good for higher RPMs, same with 327's vs 350's.

Matt
Reply
Old Oct 8, 2002 | 11:58 PM
  #13  
vader86's Avatar
vader86
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2001
Posts: 62,154
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Default Re: what makes a stroker?> (69stingray)

I saw a kit to "de-stroke" a 350, why would someone want to do that? Doe sit put the power of the engine in a certain RPM range?

smaller stroke=engine likes to rev alot higher, like over 8000rpm with no problems

match that with a cam that makes all its power high in the band and youll have a nice little race car, but i dont think it really does you any good on the street
Reply
Old Oct 9, 2002 | 10:35 AM
  #14  
Turbo-Jet's Avatar
Turbo-Jet
Melting Slicks
 
Joined: Feb 2000
Posts: 3,052
Likes: 0
From: Vancouver BC, Canada
Default Re: what makes a stroker?> (69stingray)

BMW's new Formula 1 engine revs to 19,000 rpm. I bet the stroke is less than 2". Shorter stroke=less distance=lower piston velocity=lower accelerations=lower forces, which allows for higher rpm allowed, resulting in more hp. That is how to get 850 hp out of a naturally aspirated 3.0L engine. Spin the crank 320 times per second. :crazy:
Reply

Get notified of new replies

To what makes a stroker?>





All times are GMT -4. The time now is 04:55 PM.

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