Need help with 5.3 stroker motor
Thread Starter
Registered User
Joined: Mar 2009
Posts: 5
Likes: 0
Need help with 5.3 stroker motor I have a 5.3 that I am currently building and am wanting to get 11:1 to 12:1 compression, naturally aspirated. Is pop up pistons the only way to go? Can I use the crank from a 6.0 to stroke it?
Can my standard aluminum truck heads be ported to flow as good as a Ls6 head?
Thanks for the help
Can my standard aluminum truck heads be ported to flow as good as a Ls6 head?
Thanks for the help
TECH Fanatic
Joined: Jun 2002
Posts: 1,979
Likes: 3
From: Upstate NY
I have a 5.3 that I am currently building and am wanting to get 11:1 to 12:1 compression, naturally aspirated. Is pop up pistons the only way to go? Can I use the crank from a 6.0 to stroke it?
Can my standard aluminum truck heads be ported to flow as good as a Ls6 head?
Thanks for the help
Can my standard aluminum truck heads be ported to flow as good as a Ls6 head?
Thanks for the help
You could have 5.3 heads ported and they MIGHT do as well as a stock LS6 head. It depends on who does the work. It's usually less expensive to buy LS6 heads (243 casting), have a good valve job done and call it a day.
Why 12:1 compression? For that matter if you are going to be replacing pistons, etc. why start with a 5.3? Buy a 6.0 from a salvage/recyclling yard. What is the engine going into and what do you want it to do? Is there a budget for this build?
Jon
i believe the 4.8l [they are flat tops] truck pistons will work in the 5.3 and they are flat tops the truck heads can flow just as much or more as the stock 243s main thing is the 5.3 heads have smaller intake valves get a set of 2.00" valves cut in and they will be close to 243s
they make forged pistons for the 5.3 now..... but if its a budget the 4.8 pistons do work and are flat tops ... ported 5.3 heads with a good valve job and 2.02/1.60 valves will flow pretty good but TF 205's are def. worth looking at
https://ls1tech.com/forums/generatio...205-heads.html
https://ls1tech.com/forums/generatio...205-heads.html
TECH Fanatic
Joined: Jun 2002
Posts: 1,979
Likes: 3
From: Upstate NY
i believe the 4.8l [they are flat tops] truck pistons will work in the 5.3 and they are flat tops the truck heads can flow just as much or more as the stock 243s main thing is the 5.3 heads have smaller intake valves get a set of 2.00" valves cut in and they will be close to 243s
Which casting numbers flow "just as much or more as the stock 243s"?
Installing 2.00 intakes in 5.3 heads will NOT make them "close to 243s".
Where did you get that info?
It's not nice to mislead folks. Besides it makes you look, well...not very bright.
Jon
you could put a 4" stroke in there i think there is a set of forged pistons for a 5.3 with a 4" stroke somewhere....
here i found this... either way its gonna put some decent numbers down low
here i found this...
Wiseco released a new line of forged pistons for the 5.3L Bore about 3rd quarter 08 and they are a stocked on the shelf piston. About $600
Wiseco Forged Piston Set, Your Choice of 3.780" or 3.800" Bore Size, 4.000" Stroke, 6.125" Rod Length, 1.110" CH, -7cc Dished
K473XS 3.780 bore (359ci)
K473X2 3.800 bore (363ci)
More details here... Go to the top of page 17 in the PDF
http://www.wiseco.com/Catalogs/Automotive/Chevrolet.pdf
Wiseco Forged Piston Set, Your Choice of 3.780" or 3.800" Bore Size, 4.000" Stroke, 6.125" Rod Length, 1.110" CH, -7cc Dished
K473XS 3.780 bore (359ci)
K473X2 3.800 bore (363ci)
More details here... Go to the top of page 17 in the PDF
http://www.wiseco.com/Catalogs/Automotive/Chevrolet.pdf
Trending Topics
or if your not on a budget do something no one has done (or at least very few) and put a 4" crank with forged pistons and rods with a set of TF 205's, a custom cam and a ported fast and lay down ungodly numbers that no one has ever seen out of a 5.3
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
I have been running a set of cnc ported 5.3 TEA heads that have been milled .... they flow 316 on the intake side at .600 lift and the compression is 11.5 ... it is a heads/cam bolt on daily driver that makes 452 rwhp/ 418 rwtq ... Brian Tooley does great work on the 5.3 heads...
I have been running a set of cnc ported 5.3 TEA heads that have been milled .... they flow 316 on the intake side at .600 lift and the compression is 11.5 ... it is a heads/cam bolt on daily driver that makes 452 rwhp/ 418 rwtq ... Brian Tooley does great work on the 5.3 heads...
im thinking a 5.3 bored to 3.800 with a 4" crank (363ci) with a set of TF205 heads along with a fast 90/90 setup and a ms3 cam (237/242 .603/.609 112lsa) would be insane
i just want to see someone do something different.... everyone builds a ls1 or lq4 not many people build a NA 5.3 especially to over 500hp so if you could do that it would be amazing
full setup right here of what i would do
5.3 block bored to 3.800
4" crank
forged pistons
milled TF 205's (12.5:1) < that has you thinking doesn't it
ms3 or similar cam (custom would be best)
vic jr intake with a 4150 style TB (maybe even a zex perimeter plate under that TB
)
and SD tune for e85 (if e85 isnt for you go with 11.5:1 and run 93)
and if your against the vic jr just do a fast 90/90 (although i believe a vic would be cheaper and make more power)
full setup right here of what i would do
5.3 block bored to 3.800
4" crank
forged pistons
milled TF 205's (12.5:1) < that has you thinking doesn't it
ms3 or similar cam (custom would be best)
vic jr intake with a 4150 style TB (maybe even a zex perimeter plate under that TB
)and SD tune for e85 (if e85 isnt for you go with 11.5:1 and run 93)
and if your against the vic jr just do a fast 90/90 (although i believe a vic would be cheaper and make more power)
Last edited by nastychevelle; Jun 7, 2009 at 03:31 PM.
6.0L has same stroke as 5.3 and 5.7 and 6.2.
You could have 5.3 heads ported and they MIGHT do as well as a stock LS6 head. It depends on who does the work. It's usually less expensive to buy LS6 heads (243 casting), have a good valve job done and call it a day.
Why 12:1 compression? For that matter if you are going to be replacing pistons, etc. why start with a 5.3? Buy a 6.0 from a salvage/recyclling yard. What is the engine going into and what do you want it to do? Is there a budget for this build?
Jon
You could have 5.3 heads ported and they MIGHT do as well as a stock LS6 head. It depends on who does the work. It's usually less expensive to buy LS6 heads (243 casting), have a good valve job done and call it a day.
Why 12:1 compression? For that matter if you are going to be replacing pistons, etc. why start with a 5.3? Buy a 6.0 from a salvage/recyclling yard. What is the engine going into and what do you want it to do? Is there a budget for this build?
Jon
