Null


Pages: [1]

Rogers Hopeful

  • Karma: +4/-0
Repowering!
« on: September 02, 2016, 10:03:20 AM »
well the small block pushed a valve guide and since i have the means to repower I went to a drag racing buddy of mine to build me a 434 SBC.  He's expecting 550-600HP (old motor was 325HP trying to push a SS A impeller).  And its done.  All new parts from the pan up.  The 16'6" rogers should scoot pretty good now!
« Last Edit: September 02, 2016, 10:05:28 AM by Rogers Hopeful »
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Driving a Rogers, working on a Hondo

Rogers Hopeful

  • Karma: +4/-0
Re: Repowering!
« Reply #1 on: September 02, 2016, 10:06:10 AM »
one more
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Driving a Rogers, working on a Hondo

GT Jets

  • Karma: +192/-0
Re: Repowering!
« Reply #2 on: September 02, 2016, 11:04:51 AM »
What kind of RPM are you needing to make that power? You're likely going to need to cut the impeller down a half to a full trim.

JMO
Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

GT Jets

  • Karma: +192/-0
Re: Repowering!
« Reply #3 on: September 02, 2016, 11:06:01 AM »
I think you may fall short on torque.

That thing's looking mean.
Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

Rogers Hopeful

  • Karma: +4/-0
Repowering!
« Reply #4 on: September 02, 2016, 12:06:39 PM »
Quote from: GT Jets on September 02, 2016, 11:04:51 AM
What kind of RPM are you needing to make that power? You're likely going to need to cut the impeller down a half to a full trim.

JMO

He said the way he was going to build it, was so that the power was going to come down low. Said it won't be a super high revving small block.

Most 434 sbc builds have peak HP and Tq between 5300 and 6000 rpm


Dreaming of the river
« Last Edit: September 02, 2016, 01:15:22 PM by Rogers Hopeful »
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Driving a Rogers, working on a Hondo

GT Jets

  • Karma: +192/-0
Re: Repowering!
« Reply #5 on: September 02, 2016, 12:39:05 PM »
Can't wait to hear about how it runs.
Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

Rogers Hopeful

  • Karma: +4/-0
Re: Repowering!
« Reply #6 on: September 02, 2016, 02:36:57 PM »
I don't know a lot about cam specs. But these look healthy.
300-308° .565-.580
245-253° @.050
110° lobe center.


Dreaming of the river
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Driving a Rogers, working on a Hondo

steves86ta

  • Karma: +41/-0
Re: Repowering!
« Reply #7 on: September 17, 2016, 04:41:01 PM »
I'm curious how it runs too. I have ran those heads before and didn't like them but it was a bad combination anyways.

434 is a lot of cubes for a small block. But should be a runner

Do you know what it did before? What rpm did you turn that A?
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1980 Bahner 21' Mini Day
1968 Rogers project

steves86ta

  • Karma: +41/-0
Re: Repowering!
« Reply #8 on: September 17, 2016, 04:41:27 PM »
That's a bit of duration, but not much lift. I would think it would make some good torque

But I would imagine that duration would want some rpm.

Mines only 235/242 and it's just barely coming alive at 5k. Almost sounds like it is missing at 2500 or so. In a car the cam guy wants my combination shifted at 7800
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1980 Bahner 21' Mini Day
1968 Rogers project

Rogers Hopeful

  • Karma: +4/-0
Re: Repowering!
« Reply #9 on: September 17, 2016, 11:20:28 PM »

Quote from: steves86ta on September 17, 2016, 04:41:01 PM
I'm curious how it runs too. I have ran those heads before and didn't like them but it was a bad combination anyways.

434 is a lot of cubes for a small block. But should be a runner

Do you know what it did before? What rpm did you turn that A?

I gave my engine builder full reign on what to do so he made a 383. Still gonna make 550-600 hp. 
The old motor only spun up to 4500 rpm


Dreaming of the river
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Driving a Rogers, working on a Hondo

steves86ta

  • Karma: +41/-0
Re: Repowering!
« Reply #10 on: September 19, 2016, 04:57:32 PM »
Quote from: Rogers Hopeful on September 17, 2016, 11:20:28 PM
I gave my engine builder full reign on what to do so he made a 383. Still gonna make 550-600 hp. 
The old motor only spun up to 4500 rpm


Dreaming of the river

So it ended up being a 383 not a 434?
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1980 Bahner 21' Mini Day
1968 Rogers project

Rogers Hopeful

  • Karma: +4/-0
Re: Repowering!
« Reply #11 on: September 20, 2016, 03:10:55 PM »

Quote from: steves86ta on September 19, 2016, 04:57:32 PM
So it ended up being a 383 not a 434?

That's correct. He was worried about the steam holes and sand build up in the 400 block.


Dreaming of the river
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Driving a Rogers, working on a Hondo

steves86ta

  • Karma: +41/-0
Re: Repowering!
« Reply #12 on: September 21, 2016, 01:06:49 PM »
Quote from: Rogers Hopeful on September 20, 2016, 03:10:55 PM
That's correct. He was worried about the steam holes and sand build up in the 400 block.


Dreaming of the river

sounds good. Im curious how it runs!
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
1980 Bahner 21' Mini Day
1968 Rogers project
Pages: [1]
 


Null

SMFPacks CMS 1.0.3 © 2026