Question? Is the 454 a stroked 427
Team Owner
Joined: Feb 1999
Posts: 34,447
Likes: 657
From: Republic of Texas
Re: Question? Is the 454 a stroked 427 (Glasman66)
Yes, the only difference is the stroke. They both have a bore of 4.25
427's stroke is 3.760
454's stroke is 4.000
[Modified by Corey 68, 8:17 PM 5/21/2002]
427's stroke is 3.760
454's stroke is 4.000
[Modified by Corey 68, 8:17 PM 5/21/2002]
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Question? Is the 454 a stroked 427 (silvervetteman)
You could do that but you would have to use a 427 balancer and fly wheel/flexplate. 454's are externally balanced.
:cheers:
Olivier
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Question? Is the 454 a stroked 427 (jdharkey)
So you can change the crank, connecting rods & pistons to change 454 to 427????? I never really thought about that.
Race Director
Joined: Apr 1999
Posts: 15,127
Likes: 476
From: NM
Re: Question? Is the 454 a stroked 427 (Glasman66)
From the Mortec site, http://www.mortec.com
396 = 4.096" x 3.76"
402 = 4.125" x 3.76"
427 = 4.250" x 3.76"
454 = 4.250" x 4.00"
502 = 4.466" x 4.00"
tom...
396 = 4.096" x 3.76"
402 = 4.125" x 3.76"
427 = 4.250" x 3.76"
454 = 4.250" x 4.00"
502 = 4.466" x 4.00"
tom...
Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,403
Likes: 0
From: Denver CO
Re: Question? Is the 454 a stroked 427 (Glasman66)
The reason for less displacement...
I have read and have talked to engine builders that the 454 loses some of it's rev pushing that extra stroke. The 427 would rev to the moon. That is what makes the 427 L88 so leathal.
I'm either gonna build the poo out of a small block, or make a 427 rev monster.
Look at the Mallet web site. They are not making 454, but the 427. And might I add for 32 grand.
I have read and have talked to engine builders that the 454 loses some of it's rev pushing that extra stroke. The 427 would rev to the moon. That is what makes the 427 L88 so leathal.
I'm either gonna build the poo out of a small block, or make a 427 rev monster.
Look at the Mallet web site. They are not making 454, but the 427. And might I add for 32 grand.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Team Owner
Joined: Feb 1999
Posts: 34,447
Likes: 657
From: Republic of Texas
Re: Question? Is the 454 a stroked 427 (Glasman66)
True, a 454 is more iron to sling than a 427, but look at NHRA dragsters they are running 502 cubic inch motors. Their limit is 505ci, believe me they would be a hell of a lot more cubes if there was no limit.
My dad builds air-boat motors that turn 6000rpms+ ALL day long, they're ALL 454ci+ motors.
I built my 468 to handle 7,000rpms+ with no problems.
[Modified by Corey 68, 10:28 AM 5/23/2002]
My dad builds air-boat motors that turn 6000rpms+ ALL day long, they're ALL 454ci+ motors.
I built my 468 to handle 7,000rpms+ with no problems.
[Modified by Corey 68, 10:28 AM 5/23/2002]
Burning Brakes
Joined: Nov 2000
Posts: 1,112
Likes: 145
Re: Question? Is the 454 a stroked 427 (Glasman66)
IN THEORY, a smaller displacement, big-bore, short-stroke motor will produce more peak horsepower than a larger motor with the same bore and a larger stroke.
IN THEORY. In practice, the stroker motor should produce more horsepwoer and torque at low RPMS. The smaller motor may never get to rev high enough to utilize the theoretically available power, before camshafts, valvesprings, etc. intervene.
This is the real advantage of a 383 or other stroker: they produce horsepower at real-world RPMs.
IN THEORY. In practice, the stroker motor should produce more horsepwoer and torque at low RPMS. The smaller motor may never get to rev high enough to utilize the theoretically available power, before camshafts, valvesprings, etc. intervene.
This is the real advantage of a 383 or other stroker: they produce horsepower at real-world RPMs.
Thread Starter
Drifting
Joined: Apr 2001
Posts: 1,403
Likes: 0
From: Denver CO
Re: Question? Is the 454 a stroked 427 (Glasman66)
Oh sure now you're gonna bring theory into it. I was just wondering. This all goes back to bench racing with my buds. I heard the 327 is the same. In truth, when I take the plunge I will either build the stroker 383 or an LT1 knockoff, only leaving the solid lifters out.
A LT1 roller motor would be sweet. But man those big block give me a hard.... :crazy:
A LT1 roller motor would be sweet. But man those big block give me a hard.... :crazy:
Advanced
Joined: Aug 2000
Posts: 97
Likes: 0
From: Birchwood Wisconsin
Re: Question? Is the 454 a stroked 427 (fontking1a)
I thought the 454s had thinner water jackets and were prone to over heat because of this. Is that wrong?
I've heard the overheating thing regarding motors with siamesed blocks (no water jacket between the cylinders) like the 400 SBC and 502 BBC, but I'm sure how much of it is fact.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Re: Question? Is the 454 a stroked 427 (75rat)
Yes, you could say a 454 is a factory stroked 427 & a 350 is a factory stroked 327 & a 327 is a bored & stroked 283...
The guys at Chevy were experimenting w/ more C.I. from the beginning. It took a while for some of it to get into prod...
:cool:
The guys at Chevy were experimenting w/ more C.I. from the beginning. It took a while for some of it to get into prod...
:cool:
Drifting
Joined: Mar 2000
Posts: 1,370
Likes: 0
From: Southwest Ranches FL
Re: Question? Is the 454 a stroked 427 (Glasman66)
The answer to both questions is yes, but bear in mind that it's an awfully expensive and time consuming way to lose power! If you want to rev at the expense of torque, go for a small block, maybe a 265 dual quad solid lifter motor, a 283-270hp, or even a 302 Z-28 motor. They'll rev 'til there's no tommorrow, and produce a push in your back above 3000 rpm that you wouldnt believe! But you gotta give up something to get something, and what you give up for that 5-6000 rpm peak power is low rpm driveability - you know, the stuff you use 99.9% of the time!
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
Re: Question? Is the 454 a stroked 427 (jsimpson)
I'm in a perfect position to comment on this. The engine in the BOSS 302 is an amazing high RPM engine, yet it behaves like a 2 stroke dirt bike, with nothing off idle, then hang on when it hits 3000 RPM! The BB in the vette is all in when you start off, but runs out of breath and the ability to hang together at the top end. I imagine it's similar with the difference between the 427 and 454, although to a lesser degree. Each type is fun.
Hans
Hans
