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Highest HP From 243 Heads?

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Old Jun 14, 2019 | 09:17 AM
  #41  
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Just posting the data out there. Due to a number of circumstances that is my current setup lol. Makes a lot of torque. The same heads on my LS1/MS3 cam, same car, trapped 117-118.
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Old Jun 14, 2019 | 09:18 AM
  #42  
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Originally Posted by Tuskyz28
Depending on the weight.....
He said it weighed 3490.....i would assume that's rw because 200lb falls off these cars with ease when modding. But even if it's car weight that's still not great. 243 heads are definitely capable of more.

But some of the difference here is the thread title says highest hp. That can be much different than acceleration.
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Old Jun 14, 2019 | 09:19 AM
  #43  
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Originally Posted by LaBLKv6Z
Just posting the data out there. Due to a number of circumstances that is my current setup lol. Makes a lot of torque. The same heads on my LS1/MS3 cam, same car, trapped 117-118.
How much your car weigh ?
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Old Jun 14, 2019 | 09:26 AM
  #44  
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Originally Posted by G Atsma
I agree. A 427 with 243's, no matter how good they are, is being choked. Bigger heads and smaller cam would help it.
Agreed.
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Old Jun 14, 2019 | 09:33 AM
  #45  
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Originally Posted by HioSSilver
He said it weighed 3490.....i would assume that's rw because 200lb falls off these cars with ease when modding. But even if it's car weight that's still not great. 243 heads are definitely capable of more.

But some of the difference here is the thread title says highest hp. That can be much different than acceleration.
I agree. Car dyno'd 550/502 SAE (happy dyno)
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Originally Posted by Tuskyz28
How much your car weigh ?
Last time I weighed it it was 3320 without me. I'm 190. I don't have the current weight of the car but I did do some reduction previous to the day I ran that trap speed, so 3490 was my estimated race weight.
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Old Jun 14, 2019 | 09:52 AM
  #46  
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550whp should yield you way more mph than 127. Was there issues getting down the track? Super high da? Heavy *** clutch?

Lots of stuff comes into play when talking trap speed or acceleration.
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Old Jun 14, 2019 | 10:01 AM
  #47  
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Originally Posted by HioSSilver
550whp should yield you way more mph than 127. Was there issues getting down the track? Super high da? Heavy *** clutch?

Lots of stuff comes into play when talking trap speed or acceleration.
I’ll have to check the DA, I was on the original trans which was hard shifting into 3rd and 4th. Clutch was a Monster Level 2 that was getting very hot. This setup was on an 85mm MAF also.
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Old Jun 14, 2019 | 10:04 AM
  #48  
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Ooohhh yea....that 85mm mph gonna kill a big motor at high rpm.
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Old Jun 14, 2019 | 10:12 AM
  #49  
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I’ll report back in a couple of weeks. Car is now MAFless, with a rebuilt T-56, and RXT clutch.
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Old Jun 14, 2019 | 10:27 AM
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Originally Posted by LaBLKv6Z
I’ll report back in a couple of weeks. Car is now MAFless, with a rebuilt T-56, and RXT clutch.
Should be interesting. Whats your best 60ft and e.t so far ?
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Old Jun 14, 2019 | 11:01 AM
  #51  
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Originally Posted by Tuskyz28
Should be interesting. Whats your best 60ft and e.t so far ?
1.68 60', 11.45 has been the best I could do.
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Old Jun 14, 2019 | 11:18 AM
  #52  
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Post a dyno sheet for us to see before I lose my ****.....

Just kidding :-)

Post the sheet though.
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Old Jun 14, 2019 | 11:23 AM
  #53  
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Originally Posted by bortous
Post a dyno sheet for us to see before I lose my ****.....

Just kidding :-)

Post the sheet though.
Not the prettiest but there you go.


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Old Jun 14, 2019 | 11:40 AM
  #54  
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I wonder why they let out early?
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Old Jun 14, 2019 | 11:54 AM
  #55  
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Originally Posted by LaBLKv6Z
1.68 60', 11.45 has been the best I could do.
Thats a decent time. Get your 60ft down and she will pick up out the back door as well.
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Old Jun 14, 2019 | 12:01 PM
  #56  
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Originally Posted by LaBLKv6Z
Not the prettiest but there you go.

Dyno sheet is ok.
Seems to peak early and fall off early though
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Old Jun 14, 2019 | 12:04 PM
  #57  
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Originally Posted by HioSSilver
I wonder why they let out early?
Every
Damn
Time
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Old Jun 14, 2019 | 12:25 PM
  #58  
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Originally Posted by Darth_V8r
Every
Damn
Time
I was actually making the pulls. I questioned why the rpms are off. My limiter is set at 7000 and each run I ran it to the limiter.
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Old Jun 14, 2019 | 12:28 PM
  #59  
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Originally Posted by Tuskyz28
Thats a decent time. Get your 60ft down and she will pick up out the back door as well.
I’m hoping to improve all around. It was my first time out on bias tires but the slicks were old. I have some new ones.
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Old Jun 14, 2019 | 12:37 PM
  #60  
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Looks like it could carry to 7400 still making good power
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