422 vs 427
Thread Starter
Pro
Joined: Jul 2001
Posts: 640
Likes: 0
From: Upper Marlboro MD
422 vs 427
Other than the obvious 5 ci difference are there advantages to each stroker package? :confused:
Which would you choose and why?
[Modified by Sir Sel, 10:11 AM 11/25/2001]
Which would you choose and why?
[Modified by Sir Sel, 10:11 AM 11/25/2001]
Drifting
Joined: Jul 1999
Posts: 1,434
Likes: 0
From: Miami, Fl
Re: 422 vs 427 (Sir Sel)
from what I've been told, it s risky to overbore beyond 4.030 the ls1 or ls6 block to make a 427 so the 422. with the c-5R block you can do a wider bore to make a true 427. i dont thinkk the #'s are much greater with the 427, not enough to justify the much greater cost of the block, so i went with the 422.
[Modified by Skeeter1, 10:25 AM 11/25/2001]
[Modified by Skeeter1, 10:25 AM 11/25/2001]
Thread Starter
Pro
Joined: Jul 2001
Posts: 640
Likes: 0
From: Upper Marlboro MD
Re: 422 vs 427 (Skeeter1)
Thanks Skeeter1
I also have a 422 but was curious that LPE and DRM sell the 427 and I'm pretty sure they don't use the C5-R block unless requested. Extra money of course.
I also have a 422 but was curious that LPE and DRM sell the 427 and I'm pretty sure they don't use the C5-R block unless requested. Extra money of course.
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 422 vs 427 (Sir Sel)
Here are the different possible 422/427 combo's right now. One is using the 4.000" (382) crank and the other is using a 4.125" (396) crank. The smaller crank requires a larger bore and thus the resleeving of our LS1/LS6 blocks, but as stated the C5R block already has a bore of 4.125".
4.000" stroke x 4.100" bore = 422 cid
4.000" stroke x 4.125" bore = 427 cid
4.125" stroke x 4.035" bore = 422 cid
4.125" stroke x 4.060" bore = 427 cid
The larger 4.125" stoke combo typically has higher torque and a little less HP, where as the smaller 4.000" stroke has higher HP than TQ and is a little more rev happy.
-Jeremy
[Modified by Godspeed, 11:34 PM 11/25/2001]
4.000" stroke x 4.100" bore = 422 cid
4.000" stroke x 4.125" bore = 427 cid
4.125" stroke x 4.035" bore = 422 cid
4.125" stroke x 4.060" bore = 427 cid
The larger 4.125" stoke combo typically has higher torque and a little less HP, where as the smaller 4.000" stroke has higher HP than TQ and is a little more rev happy.
-Jeremy
[Modified by Godspeed, 11:34 PM 11/25/2001]
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 422 vs 427 (MelloYellow)
I love your posts, but Damn that's a big sig!!
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 422 vs 427 (Godspeed)
BTW for my new ARE 422 I am going the 4.000" stroke x 4.100" bore route in a resleeved LS6 block. :cheers:
[Modified by Godspeed, 12:40 PM 11/26/2001]
[Modified by Godspeed, 12:40 PM 11/26/2001]
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 422 vs 427 (kewlbrz)
Regarding the 4.030" bore consider this:
4.000" stroke x 4.030" bore = 408 CID
4.125" stroke x 4.030" bore = 421 CID
This would be about the largest you could go with a stock LS1/LS6 block. This is also why some of the 422/427's are being built with the 6.0l LQ4 truck block - to accomodate larger bore sizes without resleeving.
4.125" stroke x 4.035" bore = 422 cid
4.125" stroke x 4.060" bore = 427 cid
Most 6.0l LQ4 blocks can be bored to 4.060" and some can be bored to 4.080". This is where we see other super stroker configuration sizes - 418, 432 CID.
4.000" stroke x 4.080" bore = 418 CID
4.125" stroke x 4.080" bore = 432 CID
-Jeremy
[Modified by Godspeed, 12:45 PM 11/26/2001]
4.000" stroke x 4.030" bore = 408 CID
4.125" stroke x 4.030" bore = 421 CID
This would be about the largest you could go with a stock LS1/LS6 block. This is also why some of the 422/427's are being built with the 6.0l LQ4 truck block - to accomodate larger bore sizes without resleeving.
4.125" stroke x 4.035" bore = 422 cid
4.125" stroke x 4.060" bore = 427 cid
Most 6.0l LQ4 blocks can be bored to 4.060" and some can be bored to 4.080". This is where we see other super stroker configuration sizes - 418, 432 CID.
4.000" stroke x 4.080" bore = 418 CID
4.125" stroke x 4.080" bore = 432 CID
-Jeremy
[Modified by Godspeed, 12:45 PM 11/26/2001]
Racer
Joined: Dec 2000
Posts: 339
Likes: 2
From: West Hartford, CT, USA
Re: 422 vs 427 (Sir Sel)
I have heard that some of the tuners feel resleeving the LS1 block is less than ideal as the original sleeve had 'ears'/protrusions that kept it in place within the cylinder bore whereas the resleeve is only held in place by friction. Thus they favor using the 'R' block.
Does anyone know if this is true and if it has caused any reliability or other problems?
Does anyone know if this is true and if it has caused any reliability or other problems?
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 422 vs 427 (SweetSavannah)
Does anyone know if this is true and if it has caused any reliability or other problems?
-Jeremy
Le Mans Master
Joined: Jul 2000
Posts: 7,758
Likes: 0
From: Fort Worth Texas
Cruise-In II Veteran
Cruise-In III Veteran
Re: 422 vs 427 (bruce1)
What about a 502 crate motor?
Whats up with that?
Whats up with that?
Other than that you really end up with having a big block in a light car.
Youd be happier building a hotrod, or putting a big block in a C3 which was designed for that kind of motor.
[Modified by kewlbrz, 9:47 AM 11/27/2001]
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 422 vs 427 (bruce1)
What about a 502 crate motor?
Whats up with that?
Whats up with that?
Instructor
Joined: Dec 2000
Posts: 188
Likes: 0
From: Markham Ontario
Re: 422 vs 427 (Sir Sel)
Hi Selvin, why don't you try our new 436!! the best of both worlds.
4.125 stroke with 4.100 bore in a re-sleved Ls6 block, still waiting on those numbers from you.
Talk to you soon.
The testing we did back to back just on shortblocks without changing the heads or cam was that we picked up about 10-15rwtrq from 2000rpm to peak and about 5 rwhp through the rpm range, this was going from a 422 to a 432 with same heads , cam and program.
The reliability of the resleved blocks at this point in time is not an issue at all, we have run a few in a roadrace conditions all year, 800+rwhp on No2 and everyday driving. A few years back there were some problems with this procedure and have learned the "hard" way but have learned! There is no dought that the "r" block is a better choice but the extra $4000+ in a job may make it affordable to some that don't have it, we were just trying to make the big engines "affordable", at least a bit more to some.
[Modified by Nick Agostino, 8:44 PM 11/28/2001]
4.125 stroke with 4.100 bore in a re-sleved Ls6 block, still waiting on those numbers from you.
Talk to you soon.
The testing we did back to back just on shortblocks without changing the heads or cam was that we picked up about 10-15rwtrq from 2000rpm to peak and about 5 rwhp through the rpm range, this was going from a 422 to a 432 with same heads , cam and program.
The reliability of the resleved blocks at this point in time is not an issue at all, we have run a few in a roadrace conditions all year, 800+rwhp on No2 and everyday driving. A few years back there were some problems with this procedure and have learned the "hard" way but have learned! There is no dought that the "r" block is a better choice but the extra $4000+ in a job may make it affordable to some that don't have it, we were just trying to make the big engines "affordable", at least a bit more to some.
[Modified by Nick Agostino, 8:44 PM 11/28/2001]
Thread Starter
Pro
Joined: Jul 2001
Posts: 640
Likes: 0
From: Upper Marlboro MD
Re: 422 vs 427 (Nick Agostino)
My car is still on the rack at Tony's awaiting the clutch from Cartek shipped 11/21 Fed Ex Ground, yet to arrive. :mad It's been scanned 9 times in Woodbridge NJ which is the most recent scan and has an estimated del date of today. Go figure. After calling the morons at Fed Ex the last 3 days, the best they can offer is maybe tomorrow.
Your 436 sounds interesting. I'll keep you informed.
[Modified by Sir Sel, 10:59 PM 11/28/2001]
Your 436 sounds interesting. I'll keep you informed.
[Modified by Sir Sel, 10:59 PM 11/28/2001]
Le Mans Master
Joined: Dec 1999
Posts: 8,627
Likes: 1
From: Houston Texas
CI 1-2-3-4-5-6-7-8-9-10 Vet
St. Jude Donor '03-'04-'05-'06-'07-'08-'09
Re: 422 vs 427 (Godspeed)
Jeremy,
There is another way to get to 427 (do the math)
4.080 bore and 4.080 stroke = 427 cu inches
This is known as a square motor...best compromise (IMHO) of both torque and hp worlds. That's what I had Nick build for me and what's rumblin under my hood. Oh and a direct ProFogger nitrous setup with it's own fuel system. Thanks Nick. :D
Doug
[Modified by Snowman, 11:25 PM 11/28/2001]
[Modified by Snowman, 11:28 PM 11/28/2001]
There is another way to get to 427 (do the math)
4.080 bore and 4.080 stroke = 427 cu inches
This is known as a square motor...best compromise (IMHO) of both torque and hp worlds. That's what I had Nick build for me and what's rumblin under my hood. Oh and a direct ProFogger nitrous setup with it's own fuel system. Thanks Nick. :D
Doug
[Modified by Snowman, 11:25 PM 11/28/2001]
[Modified by Snowman, 11:28 PM 11/28/2001]