TFS LS2 225cc vs L92 heads
Retired
Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
"Buy our $2500 heads!"
Seriously, though. GM Castings will work fine in nearly every application... even in forced induction, where you don't necessarily need a head that flows 320cfm @ .650. Even a stock 317 head will work wonders with a forced induction setup.
I made 514 rwhp with the converter unlocked with a 853 head that had nothing much more than a valve job and very low boost (stock pulley P1SC) on a stock cube, stock bottom end 346 on 93 octane with a 212/218 cam.
That translates to around 630-650 crank.
Mike
Thread Starter
Registered User
Joined: Jul 1999
Posts: 3,647
From: Winnipeg, Manitoba, Canada
Here's what they usually reccommend:
"Buy our $2500 heads!"
Seriously, though. GM Castings will work fine in nearly every application... even in forced induction, where you don't necessarily need a head that flows 320cfm @ .650. Even a stock 317 head will work wonders with a forced induction setup.
I made 514 rwhp with the converter unlocked with a 853 head that had nothing much more than a valve job and very low boost (stock pulley P1SC) on a stock cube, stock bottom end 346 on 93 octane with a 212/218 cam.
That translates to around 630-650 crank.
Mike
"Buy our $2500 heads!"
Seriously, though. GM Castings will work fine in nearly every application... even in forced induction, where you don't necessarily need a head that flows 320cfm @ .650. Even a stock 317 head will work wonders with a forced induction setup.
I made 514 rwhp with the converter unlocked with a 853 head that had nothing much more than a valve job and very low boost (stock pulley P1SC) on a stock cube, stock bottom end 346 on 93 octane with a 212/218 cam.
That translates to around 630-650 crank.
Mike
Worst case scenario if I run out of cash I would still like a motor that runs strong NA.
Retired
Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
You honestly need to decide what you're going to do and stop pussyfooting around
You simply can't build a motor for both. 9:1 isn't going to run worth a **** NA and 12:1 isn't going to like boost.Mike
Thread Starter
Registered User
Joined: Jul 1999
Posts: 3,647
From: Winnipeg, Manitoba, Canada
L92s are around $900 assembled. You don't need to port them for a blower setup. That's the beauty of it. Or you can pick up some 317 heads for $300.
You honestly need to decide what you're going to do and stop pussyfooting around You simply can't build a motor for both. 9:1 isn't going to run worth a **** NA and 12:1 isn't going to like boost.
Mike
You honestly need to decide what you're going to do and stop pussyfooting around
You simply can't build a motor for both. 9:1 isn't going to run worth a **** NA and 12:1 isn't going to like boost.Mike
Registered User
Joined: Dec 1999
Posts: 2,022
From: MD
Nothing like removing 100+ pounds of rotating driveline weight for a number... And where did he get "490+" from when the graph shows 480?
Registered User
Joined: Feb 2006
Posts: 21
I do not understand why some people attack others for reporting what they've seen or heard. You could have said "I do not see 490+ hp on the graph."
Apparently the claim (cause I questioned this dyno too) is its tuned to perform like a dynojet. The car stock pulled 360rwhp on this dyno (which sounds about right for a dynojet).
So, even if it was "460 rwhp", would that be bad with a small cam ?
Also, the "ugly torque curve" - go back and look at the graph again. It reads 330 rwtq at slightly above 2000 rpms. You have to go look at the scale before you jump to conclusions.
-- Lee
Last edited by LeeCTS-V; Mar 30, 2008 at 09:02 AM. Reason: I appoligize.. I should have not done any name calling. I keep forgetting this is the internet and people are rude.
Moderator
Joined: Jul 1998
Posts: 6,247
From: Charlotte,MI USA
Man, what an ***. Go back and look at the graph again - 490.8 hp. The has been since tuned again for a little more.
I do not understand why some people attack others for reporting what they've seen or heard. You don't have to believe me, but why do you need to be a dick ? You could have said "I do not see 490+ hp on the graph."
Apparently the claim (cause I questioned this dyno too) is its tuned to perform like a dynojet. The car stock pulled 360rwhp on this dyno (which sounds about right for a dynojet).
So, even if it was "460 rwhp", would that be bad with a small cam ?
Also, the "ugly torque curve" - go back and look at the graph again. It reads 330 rwtq at slightly above 2000 rpms. You have to go look at the scale before you jump to conclusions.
-- Lee
I do not understand why some people attack others for reporting what they've seen or heard. You don't have to believe me, but why do you need to be a dick ? You could have said "I do not see 490+ hp on the graph."
Apparently the claim (cause I questioned this dyno too) is its tuned to perform like a dynojet. The car stock pulled 360rwhp on this dyno (which sounds about right for a dynojet).
So, even if it was "460 rwhp", would that be bad with a small cam ?
Also, the "ugly torque curve" - go back and look at the graph again. It reads 330 rwtq at slightly above 2000 rpms. You have to go look at the scale before you jump to conclusions.
-- Lee
Registered User
Joined: Dec 1999
Posts: 2,022
From: MD
Both the graph AND the peak number readout show the same, 481.4HP. That 490.8HP you reference shows the limit of the scaling of the graph. And I would suggest you actually comprehend the "evidence" of your BS before calling names.
No kidding!
Originally Posted by LeeCTS-V
You have to go look at the scale before you jump to conclusions.
Last edited by Marc 85Z28; Mar 30, 2008 at 09:29 AM.
Registered User
Joined: Mar 2004
Posts: 2,705
just stay na. no reason to go FI with a larger cube ls2/3 setup. if you port those l92's and buy a fast 90 90 setup your not going to need the biggest cam to hit 500rwhp. Especially if you have them fully worked, Id say 540rwhp-510rwhp with 408 bottom end. Mainly depending on cam choice, but other things will play in too.
If thats not enough build a 427 -454, than you ll be right at 600rwhp withhout having to run a FI setup and still being able to run a ***** cam. When the itch for more power comes throw a 100-200 shot on it. 700-800rwhp should be enough to keep you happy. You ll never have all the bitchy tuning bs and retain some driveabillity.
Should you want more power its a button away.
If thats not enough build a 427 -454, than you ll be right at 600rwhp withhout having to run a FI setup and still being able to run a ***** cam. When the itch for more power comes throw a 100-200 shot on it. 700-800rwhp should be enough to keep you happy. You ll never have all the bitchy tuning bs and retain some driveabillity.
Should you want more power its a button away.
Thread
Thread Starter
Forum
Replies
Last Post
Hotrods&Muscle
Parts For Sale
13
Jan 28, 2015 09:35 PM
Hotrods&Muscle
LS1 Based Engine Tech
3
Dec 21, 2014 03:57 PM