LS3 & L92 Info
On The Tree
Joined: May 2004
Posts: 104
Likes: 0
From: Denver CO.
Originally Posted by StreetnStrip
u are correct but I thought he was asking what the lowest bore u could go with with using stock LS7 heads. In the GM performance book it says 4.065. I have heard that there was someone do machine work on these heads so that u could use them on a smaller bore motor but I forget who it was.
Thread Starter
Closed ex-Sponsor Account
iTrader: (7)
Joined: Dec 2002
Posts: 945
Likes: 1
From: Pittsburgh, PA
Originally Posted by Sparetire
I'll have to find pics of that. I mean, valve size and bowl size is just set. How can you adjust a head to fit a smaller bore? Is there a way to alter the seats so you can use a smaller valve?
Originally Posted by Sparetire
I'll have to find pics of that. I mean, valve size and bowl size is just set. How can you adjust a head to fit a smaller bore? Is there a way to alter the seats so you can use a smaller valve?
really though, it IS an alum head.. you could weld it up, heat-treat and machine it.. if you wanted.
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
Launching!
Joined: Jul 2004
Posts: 204
Likes: 0
From: Arizona.
Originally Posted by MrDude_1
ETP actually has a diffrent LS7 casting. thats why they can machine them to fit the smaller bore.
really though, it IS an alum head.. you could weld it up, heat-treat and machine it.. if you wanted.
really though, it IS an alum head.. you could weld it up, heat-treat and machine it.. if you wanted.
Originally Posted by 04Yukonxl
There's always the old bar method.
On The Tree
Joined: Mar 2006
Posts: 138
Likes: 0
From: Northeast TN
Does anyone have the parts # on the complete Holden intake manifold with injectors and 90mm TB? Also, what rods/pistons are needed? I'm trying to get a parts list to see how much I'll need for a build. Thanks in advance.
Originally Posted by 91_RS_LS1
Does anyone have the parts # on the complete Holden intake manifold with injectors and 90mm TB? Also, what rods/pistons are needed? I'm trying to get a parts list to see how much I'll need for a build. Thanks in advance.
Originally Posted by Wnts2Go10O
so...what soring compressor is everyone using with these heads on the motor? (crane compressor no longer works
)
)
Originally Posted by 91_RS_LS1
Does anyone have the parts # on the complete Holden intake manifold with injectors and 90mm TB? Also, what rods/pistons are needed? I'm trying to get a parts list to see how much I'll need for a build. Thanks in advance.
The rods depend on what you plan on using. If you're going iron block 408, you'll need 6.125 rods for a 4 inch stroke. Pistons would most likely have to be custom if you want to get the most out of the combo. You could use some off the shelf 4.030 bore ones, but they'd have to be flat tops or domes. Even then you might have problems with achieving the proper SCR you desire. Milling the heads is an option, but then you're reducing P2V clearance.
To put it in context this is going to cost a hell of a lot more than just putting a LS1 in your car like your original plan was.
On The Tree
Joined: Mar 2006
Posts: 138
Likes: 0
From: Northeast TN
Thanks for the link. I was thinking they were less, but that is still a good deal. Any idea as to how to convert it to cable throttle?
Yea, I know this is going to be a heck of alot more. I'll probably just put in an LS1/T56 from a wrecked donor car and then build the L92 in the summer of '08. And even then, it will probably just be a stock one with a larger cam. They should have some pistons for the engine out by then. I wouldn't want to be loosing power due to lower compression. What rods would I need for a stock stroke?
Yea, I know this is going to be a heck of alot more. I'll probably just put in an LS1/T56 from a wrecked donor car and then build the L92 in the summer of '08. And even then, it will probably just be a stock one with a larger cam. They should have some pistons for the engine out by then. I wouldn't want to be loosing power due to lower compression. What rods would I need for a stock stroke?
$$$Crazy Deal$$$
Originally Posted by 91_RS_LS1
Thanks for the link. I was thinking they were less
Not to mention throttle body, fuel rails, and intake.
On The Tree
Joined: Mar 2006
Posts: 138
Likes: 0
From: Northeast TN
Oh. That's... a lot of flow. Those going on a F/I engine?
What length rod should I use to get a stock stroke (or just buy the stock GMs)? Could I use the 6.125 rods and run them in a stock block? Would the stock crank work with these rods? (sorry for all the questions, but my knowledge is pretty basic)
What length rod should I use to get a stock stroke (or just buy the stock GMs)? Could I use the 6.125 rods and run them in a stock block? Would the stock crank work with these rods? (sorry for all the questions, but my knowledge is pretty basic)