Highest rwhp from NA fbody??? - LS1TECH - Camaro and Firebird Forum Discussion

Notices
Dynamometer Results & Comparisons Dyno Records | Dyno Discussion | Dyno Wars

Highest rwhp from NA fbody???

Old 12-05-2018, 10:04 PM
  #1  
Registered User
Thread Starter
 
519camarobrad's Avatar
 
Join Date: Nov 2018
Location: Kitchener Ontario
Posts: 7
Default Highest rwhp from NA fbody???

Just wondering what people think or know the highest rwhp from a stock 346 N/A build in an fbody is?? I know all the highest numbers like 530-540 were in a c5. But what about in a 4th gen fbody?
519camarobrad is offline  
Old 12-05-2018, 11:25 PM
  #2  
TECH Senior Member
 
Join Date: Jun 2016
Location: Central Cal.
Posts: 8,326
Default

How "stock" are you talking here?
G Atsma is offline  
Old 12-05-2018, 11:48 PM
  #3  
Registered User
Thread Starter
 
519camarobrad's Avatar
 
Join Date: Nov 2018
Location: Kitchener Ontario
Posts: 7
Default

Stock cubes and rotating assembly
519camarobrad is offline  
Old 12-06-2018, 12:07 AM
  #4  
LS1Tech Premium Sponsor
iTrader: (2)
 
Join Date: Apr 2016
Posts: 3,756
Default

Cartech was making well over 500 on some VERY heavily ported 243s back in 08 or 09. Im sure its very near mid to upper 500s with aftermarket heads and intakes but they were undriveable on the street, so build for what you are going to do, not what you want. Shooting for above 500hp is going to cost you ALOT of bottom end and peak tq due to the cubic inches and max cr you can run. even bumping E85 will still cost you.
tech@WS6store is online now  
Old 12-06-2018, 09:09 AM
  #5  
"I MAID THEESE"
iTrader: (2)
 
Mavn's Avatar
 
Join Date: Jul 2011
Location: Houston
Posts: 1,133
Default

Well your answer is here on this forum hahaha go check out Darths Build
Mavn is offline  
Old 12-06-2018, 10:25 AM
  #6  
10 Second Club
iTrader: (4)
 
Darth_V8r's Avatar
 
Join Date: Jul 2014
Location: My own internal universe
Posts: 6,419
Default

Originally Posted by Mavn
Well your answer is here on this forum hahaha go check out Darths Build
Originally Posted by 519camarobrad
Just wondering what people think or know the highest rwhp from a stock 346 N/A build in an fbody is?? I know all the highest numbers like 530-540 were in a c5. But what about in a 4th gen fbody?
I think I have it still(?)

Build thread is in my sig. it is a LLLOONNGG one.

Thats what SHE said
Darth_V8r is offline  
Old 12-06-2018, 02:08 PM
  #7  
Registered User
Thread Starter
 
519camarobrad's Avatar
 
Join Date: Nov 2018
Location: Kitchener Ontario
Posts: 7
Default

Nice, 538/441 Darth v8r . I'm gonna try my best to beat your numbers ! Congrats on your accomplishment, is there a post that shows all your mods?
519camarobrad is offline  
Old 12-06-2018, 02:34 PM
  #8  
TECH Fanatic
 
Join Date: Aug 2009
Location: Coast of San Mateo County Between Pacifica & HMB
Posts: 1,443
Default

Originally Posted by 519camarobrad View Post
Nice, 538/441 Darth v8r . I'm gonna try my best to beat your numbers ! Congrats on your accomplishment, is there a post that shows all your mods?
Wont be cheap and will need to spin 7500 RPM.
Start with Mast Small Bore LS3 Heads, 11.5-12.0:1 Compression, FAST LS3 W/Mid-Length Runners,
LLSR From Cam Motion specced by Darth LOL. and all the little details.
Good Luck!
NAVYBLUE210 is offline  
Old 12-06-2018, 02:41 PM
  #9  
TECH Senior Member
 
Join Date: Jun 2016
Location: Central Cal.
Posts: 8,326
Default

Originally Posted by NAVYBLUE210 View Post

.. and all the little details.
Good Luck!
Here's where it's REALLY tricky......
G Atsma is offline  
Old 12-06-2018, 04:04 PM
  #10  
10 Second Club
iTrader: (4)
 
Darth_V8r's Avatar
 
Join Date: Jul 2014
Location: My own internal universe
Posts: 6,419
Default

Originally Posted by 519camarobrad
Nice, 538/441 Darth v8r . I'm gonna try my best to beat your numbers ! Congrats on your accomplishment, is there a post that shows all your mods?
Yes. The first post in that ghost hawk build thread is where I ended up. I kept it updated with everything. But its worth reading the whole thread, because beyond the mods, I posted every mistake I made. There are a lot of nuggets in that thread beyond the list of parts. I do think there may have been another 20 or so HP, but I was not going to get it. I was losing compression and on disassembly I found hot spots on the bearings. My rings were not badly worn but they had no spring in them anymore.

Be cool if you did beat it. Mixed emotions for me though. Lol
Originally Posted by NAVYBLUE210
Wont be cheap and will need to spin 7500 RPM.
Start with Mast Small Bore LS3 Heads, 11.5-12.0:1 Compression, FAST LS3 W/Mid-Length Runners,
LLSR From Cam Motion specced by Darth LOL. and all the little details.
Good Luck!
Honest question -- you think the mast small bores might beat the Mamo 220? I kind of doubt it myself.

That thing really was a badass 346.
Darth_V8r is offline  
Old 12-06-2018, 04:34 PM
  #11  
Registered User
Thread Starter
 
519camarobrad's Avatar
 
Join Date: Nov 2018
Location: Kitchener Ontario
Posts: 7
Default

I'm gonna stick with ls1 stuff, I know you make crazy power with ls3 and even ls2 conversions but I'm gonna see what I can get out of ls1 style intake and heads
519camarobrad is offline  
Old 12-06-2018, 05:23 PM
  #12  
Registered User
Thread Starter
 
519camarobrad's Avatar
 
Join Date: Nov 2018
Location: Kitchener Ontario
Posts: 7
Default


I got 491 and 435 out of the mish mash of parts i put together but as you can see it falls off hard at 6400rpm which is from the bad porting on the used fast 90 i bought and installed. Its coming off and im putting on an msd atomic air force that will be ported by tony mamo. Along with a bunch of other stuff to make it rev happier like hollow stem valves, short travel lifters, an electric water pump etc, hopefully itll be up around darth v8r with 538/441
519camarobrad is offline  
Old 12-06-2018, 05:46 PM
  #13  
On The Tree
iTrader: (1)
 
bnastystuntz's Avatar
 
Join Date: Jan 2014
Location: new jersey
Posts: 133
Default

i bet u could get upper 500 dependin on setup.... bump the compression ration 13:1 Good set of heads ...How u thinK TEXAS SPEED got that stock bottom end record .
bnastystuntz is offline  
Old 12-06-2018, 05:48 PM
  #14  
LS1Tech Premium Sponsor
iTrader: (2)
 
Join Date: Apr 2016
Posts: 3,756
Default

The main issue is, all dynos read differently and the numbers can be off quite a bit from one to the other.
I may have an interesting setup early next year to toss in this thread though.
tech@WS6store is online now  
Old 12-06-2018, 09:03 PM
  #15  
TECH Fanatic
 
nmass399's Avatar
 
Join Date: Sep 2007
Location: hattiesburg, Ms
Posts: 1,143
Default

I may dyno mine soon, gonna have a local dyno meet in January. Been curious to what kind of power its making now but Im gonna retune with the new dual wideband setup.
nmass399 is offline  
Old 12-06-2018, 09:18 PM
  #16  
11 Second Club
 
Launch's Avatar
 
Join Date: Jan 2003
Posts: 402
Default

Originally Posted by bnastystuntz View Post
i bet u could get upper 500 dependin on setup.... bump the compression ration 13:1 Good set of heads ...How u thinK TEXAS SPEED got that stock bottom end record .
I'm sure their 9.6 ET sbe ls1 car has everything under the sun possible done to it. Still impressive though what can be achieved with an all out effort sbe ls1.

I live in Australia and over here we had a lot of ls1's sold new in Holdens. Thousands of them, and now the engines are everywhere for $500-$1000 like your 5.3 truck engines are over there. Because of our current crappy exchange rate and taxes and shipping costs are higher than ever, your parts now end up costing double for me over here. So I'm going to be trying max effort out of 5.7 ls1s because I have 4 of them already. I paid $200 for one of the long motors that was a perfect runner.. it broke a valve spring (didn't drop a valve) and it was ticking.. that's it. And the owner wanted to throw his money away and get a new engine.

I have small bore ls7 heads and T&D rockers from a Daytona nascar and that will be my next mod.. remove the stock ls1 heads and fit these with an ls7 intake. I just wish I didn't have to cut valve reliefs to run any kind of decent size cam. I also have a Comp 243/250 here I can use that made 500rwhp in an ls3.
Launch is offline  
Old 12-06-2018, 09:35 PM
  #17  
10 Second Club
iTrader: (4)
 
Darth_V8r's Avatar
 
Join Date: Jul 2014
Location: My own internal universe
Posts: 6,419
Default

Originally Posted by bnastystuntz
i bet u could get upper 500 dependin on setup.... bump the compression ration 13:1 Good set of heads ...How u thinK TEXAS SPEED got that stock bottom end record .
I had compression at 11.5:1, and I am not affiliated with Texas Speed.
Darth_V8r is offline  
Old 12-06-2018, 09:51 PM
  #18  
10 Second Club
 
big hammer's Avatar
 
Join Date: May 2009
Location: over dere
Posts: 3,069
Default

I can see 575-600 rwhp being done. Limiting factor will be how high you’re willing to spin on the Stock rods.
big hammer is offline  
Old 12-06-2018, 09:55 PM
  #19  
10 Second Club
 
big hammer's Avatar
 
Join Date: May 2009
Location: over dere
Posts: 3,069
Default

As far as streetable and on the Stock bottom Darths 540 rwhp will be hard to beat. He could have beat it imo by 10 or so. His short block was tired lol. Was an awesome build.

take the 100% streetable and make it stock CI but not Stock bottom end and it’s a different ballgame
big hammer is offline  
Old 12-06-2018, 09:58 PM
  #20  
10 Second Club
iTrader: (4)
 
Darth_V8r's Avatar
 
Join Date: Jul 2014
Location: My own internal universe
Posts: 6,419
Default

Originally Posted by big hammer
As far as streetable and on the Stock bottom Darths 540 rwhp will be hard to beat. He could have beat it imo by 10 or so. His short block was tired lol. Was an awesome build.

take the 100% streetable and make it stock CI but not Stock bottom end and it’s a different ballgame
I think I seen damn near 600 on a short stroke big bore. Basically a 4.125 x 3.27. Spun to the moon and back
Darth_V8r is offline  

Thread Tools
Search this Thread

Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: