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Is 575whp possible n/a?

Old Mar 31, 2016 | 05:17 PM
  #121  
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Originally Posted by 1lejohn
What's your definition of a stock bottom end? So your saying I could get a wrecking yard 346 and make 500+ HP with it.

I've looked over several years of engine master builds and those guys aren't making the kind of power your talking about with those heads and cubic inches.

The ET's you have run with your builds are very impressive. If everything else on the car is optimized you can run good ET's with less power. Several of the other posters show that.

I'm not drinking the kool aid just yet. If you have this figured out then you should be building engines for the NHRA stock classes and making some $$$, or better yet step up and run those classes.

So not to be a true Richard head and just bash people. I give you a lot of credit for going as far as you have and pushing the boundries. I certainly have not with my builds. Good luck with your quest.

Engine Masters rules require 92 octane and power is measured from 3500-6500rpm. My BBC 477 did 766hp at the 2013 competition. At 7000 it does 810hp and at 7500, I hope it does 850hp.

I think getting 575rwhp, 625fwhp is doable with e85, more compression, and more rpm. It would not be easy but possible.
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Old Mar 31, 2016 | 06:40 PM
  #122  
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Originally Posted by vetteboy2k
We do a lot of the same things with the c6Z that we did with the c5Z to make power and to perform well on the drag strip.

Some of the fastest c6's that I help with all take advantage of high rpm and lightweight stuff.


Here 's one way to make power in a C6Z.

https://ls1tech.com/forums/dynamomet...935fwhp-n.html

This setup was originally designed for my car @ 10,000+ rpms but it has found a new home in a C6Z and at a more conservative atmosphere.
A 396ci pushing 1000fwhp in my vette.... One can only dream.
Make sure you get some videos if that ever makes it to the track!

I wish I had a c6z but I have to deal with having the ls7 in my fbody lol. Im getting the valvetrain setup now with the light weight valves and psi beehives so hopefully I see a good increase with that. Also trying the msd intake. I think my times will improve alot this year once I get it all back together.

Ive read some of your other threads, I have a 28x10.5 Hoosier stiffwall with 4.30 gears, I noticed you like the 26" tires. Recon they would do any good with my gearing in a fbody?
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Old Mar 31, 2016 | 06:47 PM
  #123  
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CID X RPM / 3456 = CFM

CFM * .069 = lb/min, at some temp K

Working backwards,

60lb/min / .069 = 869CFM~ needed

869CFM * 3456 / 350CID = 8,500 RPM with 100% VE

Answer to the thread: Yes, at 8,500rpm if you had 100% you should be around 600bhp which would put you around 550~rwhp to the tires.

I wouldn't do it though, because
A: street manners will be poor
B: Economy will be mediocre
C: OEM bearing clearances will not enjoy the ride (it will probably spin a rod bearing at some point) i.e. just because you see max PSI in oil pressure at the sender doesn't mean the bearings are all receiving their fare share.


Instead: Forced induction is your friend
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Old Apr 1, 2016 | 07:06 AM
  #124  
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Originally Posted by WVhuggerSS
Make sure you get some videos if that ever makes it to the track!

I wish I had a c6z but I have to deal with having the ls7 in my fbody lol. Im getting the valvetrain setup now with the light weight valves and psi beehives so hopefully I see a good increase with that. Also trying the msd intake. I think my times will improve alot this year once I get it all back together.

Ive read some of your other threads, I have a 28x10.5 Hoosier stiffwall with 4.30 gears, I noticed you like the 26" tires. Recon they would do any good with my gearing in a fbody?
Goodluck.
I'd start with some extra air in those tires.
I'd also have Mamo work over the manifold.
Cathedral or square port heads?
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Old Apr 1, 2016 | 07:11 AM
  #125  
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Originally Posted by kingtal0n
CID X RPM / 3456 = CFM

CFM * .069 = lb/min, at some temp K

Working backwards,

60lb/min / .069 = 869CFM~ needed

869CFM * 3456 / 350CID = 8,500 RPM with 100% VE

Answer to the thread: Yes, at 8,500rpm if you had 100% you should be around 600bhp which would put you around 550~rwhp to the tires.

I wouldn't do it though, because
A: street manners will be poor
B: Economy will be mediocre
C: OEM bearing clearances will not enjoy the ride (it will probably spin a rod bearing at some point) i.e. just because you see max PSI in oil pressure at the sender doesn't mean the bearings are all receiving their fare share.


Instead: Forced induction is your friend
Most formulas don't include all the variables to make them accurate.
That's why we actually race.
I'm making well over 500w dynojet now cam only which tells me the formula is missing something and you didn't read the thread.
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Old Apr 1, 2016 | 11:40 AM
  #126  
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Originally Posted by vetteboy2k
Most formulas don't include all the variables to make them accurate.
That's why we actually race.
I'm making well over 500w dynojet now cam only which tells me the formula is missing something and you didn't read the thread.
of course its missing something, its just for a general idea. Air temp, rolling resistance, compression, fuel quality, the list goes on.

Its still a handy little tool to figure out what an air pump is going to move, within reason, which helps size other parts, like a compressor for example. Also, why would I read the thread? The topic is clearly trolling the community for grey area answers. like mine There is no right or wrong answer, everybody knows you can make 600horsepower with a 350cid engine N/A its been done since like 1967, that isn't the proper question though. It should be something like "can you do it and get 30mpg and maintain daily driver manners" etc

if I am not mistaken, one must read the thread title to understand the thread content, as the title drives the content. Thus my response is correctly oriented against the thread topic without needing to read further.

Last edited by kingtal0n; Apr 1, 2016 at 10:04 PM.
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Old Apr 1, 2016 | 01:49 PM
  #127  
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Originally Posted by vetteboy2k
Goodluck.
I'd start with some extra air in those tires.
I'd also have Mamo work over the manifold.
Cathedral or square port heads?

Thanks ill keep you updated. Okay will do, these tires seem to work pretty good so far. Yeah thats who I got the msd from is him and a 102tb. It hasn't came in yet but looking forward to it.

Square ports, still using gm ls7 heads with tsp port program and a little extra hand work from the local machine shop
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Old Apr 1, 2016 | 04:04 PM
  #128  
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Originally Posted by kingtal0n
of course its missing something, its just for a general idea. Air temp, rolling resistance, compression, fuel quality, the list goes on.

Its still a handy little tool to figure out what an air pump is going to move, within reason, which helps size other parts, like a compressor for example. Also, why would I read the thread? The topic is clearly trolling the community for grey area answers. like mine There is no right or wrong answer, everybody knows you can make 600horsepower with a 350cid engine N/A its been done since like 1967, that isn't the proper question though. It should be something like "can you do it and get 30mpg and maintain daily driver manners" etc
You missed the point because you didn't read the thread. No big deal. Your input is welcomed either way.
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Old Apr 6, 2016 | 02:33 PM
  #129  
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I see another .3 cam only without any necessary R&D.
If I had the motivation, I'd run it another 10 passes with the more optimal setup to see how low it would go then do heads.

For heads for this particular setup I'd consider:
1) LS3 small bore square port heads
2) MMS 220 cathedral heads
...along with a fast 102 manifold ported by Mamo.
I'd like to try and gain 50+ from the heads, ported 102, and nice bump in compression over my current setup.
My top priority would be to sell the car. The best of both worlds would be if someone wanted the car with heads so I would be obligated to dyno test and back it up on the drag strip for the new buyer. lol
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Old Apr 7, 2016 | 12:02 PM
  #130  
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How come you seem to be getting out of drag racing Rob? It's obvious you still think about it and have a talent for it.
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Old Apr 8, 2016 | 11:53 AM
  #131  
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Also...

Have ypu found any power or benefits with any certain harmonic balancers?
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Old Apr 8, 2016 | 12:55 PM
  #132  
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Originally Posted by HioSSilver
How come you seem to be getting out of drag racing Rob? It's obvious you still think about it and have a talent for it.
It's time for me to focus on the kids esp.since I spent so many years focused on my hobbies.

I use an ATI and have not tested any other.
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Old Apr 8, 2016 | 02:52 PM
  #133  
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Enjoyed reading the thread on CF about this. I wish Ed Curtis wasn't banned on her. When I was going to get the Mast heads for the cam he spec'ed for me, he said I could clear 500 easy with a few changes to my set up. Unfortunately my car didn't drive friendly for me. Specs of the cam were 244/248 .630 112.0. People told me with the added compression it would help with driveability.
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Old May 11, 2016 | 03:03 PM
  #134  
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I'll bump this to take some pressure off Hammer, lol.
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Old May 11, 2016 | 03:19 PM
  #135  
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Originally Posted by vetteboy2k
I'll bump this to take some pressure off Hammer, lol.
Lol thanks.

I think the 575 is possible. Been talking a lot with hio to Darth V8r and we all think his setup can be pushed to 550+ with some choice mods. He's at 500 currently with a moderate cam and SBE LS1.
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Old May 11, 2016 | 04:36 PM
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But we are just trying to please a dyno here. Not something fast or quick.
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Old May 11, 2016 | 05:00 PM
  #137  
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Originally Posted by vetteboy2k
I'll bump this to take some pressure off Hammer, lol.
Good call....lol
Originally Posted by handyandy496
But we are just trying to please a dyno here. Not something fast or quick.
Uuuuhhhhh No. Why would someone do that? The whole point woukd be to push the envelope.
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Old May 11, 2016 | 07:57 PM
  #138  
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This is a very good thread. I don't think you have much of an argument. If any. After seeing what could be accomplished with the best combo, if you want more, you can still step up to a solid roller cam.
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Old May 12, 2016 | 12:01 AM
  #139  
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Originally Posted by SoFla01SSLookinstok
This is a very good thread. I don't think you have much of an argument. If any. After seeing what could be accomplished with the best combo, if you want more, you can still step up to a solid roller cam.
exactly right!
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Old Jun 3, 2016 | 09:18 AM
  #140  
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Originally Posted by WVhuggerSS
Make sure you get some videos if that ever makes it to the track!

I wish I had a c6z but I have to deal with having the ls7 in my fbody lol. Im getting the valvetrain setup now with the light weight valves and psi beehives so hopefully I see a good increase with that. Also trying the msd intake. I think my times will improve alot this year once I get it all back together.

Ive read some of your other threads, I have a 28x10.5 Hoosier stiffwall with 4.30 gears, I noticed you like the 26" tires. Recon they would do any good with my gearing in a fbody?
They started the c6z up. Still a lot of tuning to do and all the little details need to be addressed. Hoping it gets to a track in a few weeks. Should be running @ < 70% of it's potential for the first several times to the track. Plan to walk it out and short shift @ 7500 for the first few passes.
That's where we started the pull on the engine dyno. lol
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