417 LS3 Stroker
Thread Starter
TECH Enthusiast
Joined: Sep 2010
Posts: 580
Likes: 0
From: North Central Ohio
417 LS3 Stroker A 4.071 bore & 4 inch stroke in an LS3 yields a 417 CID engine,and Cathedral Port heads+Fast 90-92MM intake work good.
Would a 11+:1 CR with a hydrallic dual pattern cam(ie N2O cam), assumming good heads make 570-630 FWHP on E-85?
What cathedral port heads do you folks recommend?
I hear a 417 LS3 stroker is prefered to a 427 for FI or N2O.
Would a 11+:1 CR with a hydrallic dual pattern cam(ie N2O cam), assumming good heads make 570-630 FWHP on E-85?
What cathedral port heads do you folks recommend?
I hear a 417 LS3 stroker is prefered to a 427 for FI or N2O.
A 4.071 bore & 4 inch stroke in an LS3 yields a 417 CID engine,and Cathedral Port heads+Fast 90-92MM intake work good.
Would a 11+:1 CR with a hydrallic dual pattern cam(ie N2O cam), assumming good heads make 570-630 FWHP on E-85?
What cathedral port heads do you folks recommend?
I hear a 417 LS3 stroker is prefered to a 427 for FI or N2O.
Would a 11+:1 CR with a hydrallic dual pattern cam(ie N2O cam), assumming good heads make 570-630 FWHP on E-85?
What cathedral port heads do you folks recommend?
I hear a 417 LS3 stroker is prefered to a 427 for FI or N2O.
It runs fine on 91 octane fuel. Can't say much about E85 as I have no experience with it.
Jimbo
Next R&D "bullet" about to hit the dyno.... - LS1TECH
You'll need a slightly different cam.....
A sleeved LS2 427 is fine....
For a big shot, you might consider a 3.8x crank LS3 and a longer rod ala the AES assemblies.
You'll need a slightly different cam.....
A sleeved LS2 427 is fine....
For a big shot, you might consider a 3.8x crank LS3 and a longer rod ala the AES assemblies.
With E85 I'd go with 12:5 
The 90 Intake will NOT help with you goals....
and yes 418ci is prefered over 427ci if you're talking about LS3 block even though there are a couple of member that done 427ci LS3 with over 200shot for a long time..
For the heads way too many choice and it depends on your $$$$$
The 90 Intake will NOT help with you goals....
and yes 418ci is prefered over 427ci if you're talking about LS3 block even though there are a couple of member that done 427ci LS3 with over 200shot for a long time..
For the heads way too many choice and it depends on your $$$$$
With E85 I'd go with 12:5
The 90 Intake will NOT help with you goals....
and yes 418ci is prefered over 427ci if you're talking about LS3 block even though there are a couple of member that done 427ci LS3 with over 200shot for a long time..
For the heads way too many choice and it depends on your $$$$$
The 90 Intake will NOT help with you goals....
and yes 418ci is prefered over 427ci if you're talking about LS3 block even though there are a couple of member that done 427ci LS3 with over 200shot for a long time..
For the heads way too many choice and it depends on your $$$$$
Trending Topics
Thread Starter
TECH Enthusiast
Joined: Sep 2010
Posts: 580
Likes: 0
From: North Central Ohio
A ton of interesting thoughts here, thanks fellows.
I thought the 4.071 bore was the most common overbore for LS3's.
What is the max overbore on an LS3 stock sleaved block?
If I had built a 4.071 bore LS3 with a 3.8 stroke crank(396 vs 417) how much would I leave on the table as far as HP/TQ "off the bottle"?
A 12:1 CR would be a great compromise CR for N/A & N2O but don't know how good 13:1+ would be with E-85 & a 100-250HP shot,if I ran N/A only a 14:1 might be the trick.
Is the Fast 102MM intake available for Cathedral Port heads?
I thought the 4.071 bore was the most common overbore for LS3's.
What is the max overbore on an LS3 stock sleaved block?
If I had built a 4.071 bore LS3 with a 3.8 stroke crank(396 vs 417) how much would I leave on the table as far as HP/TQ "off the bottle"?
A 12:1 CR would be a great compromise CR for N/A & N2O but don't know how good 13:1+ would be with E-85 & a 100-250HP shot,if I ran N/A only a 14:1 might be the trick.
Is the Fast 102MM intake available for Cathedral Port heads?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
A ton of interesting thoughts here, thanks fellows.
I thought the 4.071 bore was the most common overbore for LS3's.
What is the max overbore on an LS3 stock sleaved block?
If I had built a 4.071 bore LS3 with a 3.8 stroke crank(396 vs 417) how much would I leave on the table as far as HP/TQ "off the bottle"?
A 12:1 CR would be a great compromise CR for N/A & N2O but don't know how good 13:1+ would be with E-85 & a 100-250HP shot,if I ran N/A only a 14:1 might be the trick.
Is the Fast 102MM intake available for Cathedral Port heads?
I thought the 4.071 bore was the most common overbore for LS3's.
What is the max overbore on an LS3 stock sleaved block?
If I had built a 4.071 bore LS3 with a 3.8 stroke crank(396 vs 417) how much would I leave on the table as far as HP/TQ "off the bottle"?
A 12:1 CR would be a great compromise CR for N/A & N2O but don't know how good 13:1+ would be with E-85 & a 100-250HP shot,if I ran N/A only a 14:1 might be the trick.
Is the Fast 102MM intake available for Cathedral Port heads?
Yes a 102/102 combo is all they make now....
Thread Starter
TECH Enthusiast
Joined: Sep 2010
Posts: 580
Likes: 0
From: North Central Ohio
Too bad Fast killed the 90 & 92MM intakes.
Glad to see some E-85 users.
Anyone using a GMMP carb'd intake with EFI?
Glad to see some E-85 users.
Anyone using a GMMP carb'd intake with EFI?
Last edited by N2OBaby; Mar 24, 2011 at 01:39 PM. Reason: One question
