View Poll Results: How many HP will the 434 make?
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How many HP will my new 434 make on the engine dyno?
06-21-2007, 08:14 PM
#1
Team Owner
Thread Starter
How many HP will my new 434 make on the engine dyno?
Here are the technical specs:
Dart Iron Eagle block
4.155" bore, 4" stroke = 434 cubic inches
Mahle dome pistons, 14.2 : 1 compression
Dart Pro 1 heads fully ported, flow approx. 320 cfm on the intake and 230 cfm on the exhaust
Custom comp cams solid roller with 284/296 degrees .050 duration, 110 degrees LSA and .704/.704 lift, 4 - 7 firing order swap
Edelbrock 2970 Super Victor 4500 series intake - fully ported and matched to heads
Holley 1050 Dominator carb (3 circuit)
So, how many HP will the setup make?
This engine will be dyno tested with my 1 7/8 inch sidepipes and not like the 406 with 1 5/8 headers..
(Desktop dyno says 696 HP)
A 1 inch HVH spacer will also be used!!
Dart Iron Eagle block
4.155" bore, 4" stroke = 434 cubic inches
Mahle dome pistons, 14.2 : 1 compression
Dart Pro 1 heads fully ported, flow approx. 320 cfm on the intake and 230 cfm on the exhaust
Custom comp cams solid roller with 284/296 degrees .050 duration, 110 degrees LSA and .704/.704 lift, 4 - 7 firing order swap
Edelbrock 2970 Super Victor 4500 series intake - fully ported and matched to heads
Holley 1050 Dominator carb (3 circuit)
So, how many HP will the setup make?
This engine will be dyno tested with my 1 7/8 inch sidepipes and not like the 406 with 1 5/8 headers..
(Desktop dyno says 696 HP)
A 1 inch HVH spacer will also be used!!
Last edited by GrandSportC3; 06-23-2007 at 07:05 PM.
Did you buy this motor without asking that question???
06-21-2007, 10:37 PM
#6
Team Owner
Thread Starter
According to the builder it should make somewhere around 700 HP.. However, estimation and actual dyno numbers are a different story..
I do trust the builder as my old 406 went from running low 11's to run low 10's with only a few small changes.. That guy knows to make power!!
I do trust the builder as my old 406 went from running low 11's to run low 10's with only a few small changes.. That guy knows to make power!!
06-21-2007, 10:39 PM
#7
Team Owner
Thread Starter
I will video-tape the dyno runs of the 434 so I'll get some idea of the power/torque curve..
06-21-2007, 10:42 PM
#8
Melting Slicks
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According to the builder it should make somewhere around 700 HP.. However, estimation and actual dyno numbers are a different story..
I do trust the builder as my old 406 went from running low 11's to run low 10's with only a few small changes.. That guy knows to make power!!
I do trust the builder as my old 406 went from running low 11's to run low 10's with only a few small changes.. That guy knows to make power!!
06-21-2007, 10:47 PM
#9
Team Owner
Thread Starter
Mid to upper 9's in winter and upper 9's to low 10's in summer on engine and high 8's on a 250 shot in winter/low 9's in summer.
I don't expect to be immediately in the 9's as I'll have to tweak the setup to get the most out of it... It's a completely new setup...
I don't expect to be immediately in the 9's as I'll have to tweak the setup to get the most out of it... It's a completely new setup...
06-22-2007, 12:11 AM
#10
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So have they worked out dyno issues? You might as well crank it up in the car without the dyno actually working right. That's a pretty expensive break in stand.
C'mon Ollie....let's get some REAL numbers on this bad boy!!
It would be neat to have good solid numbers and then equate them to your car. Your car is pretty darn consistent and works well.....it's a heck of a test bed. From now on you would be able to always know *what does what* on your car and would be able to accurately predict what changes will end up with on the track.
JIM
C'mon Ollie....let's get some REAL numbers on this bad boy!!
It would be neat to have good solid numbers and then equate them to your car. Your car is pretty darn consistent and works well.....it's a heck of a test bed. From now on you would be able to always know *what does what* on your car and would be able to accurately predict what changes will end up with on the track.
JIM
06-22-2007, 12:23 AM
#11
Team Owner
Thread Starter
So have they worked out dyno issues? You might as well crank it up in the car without the dyno actually working right. That's a pretty expensive break in stand.
C'mon Ollie....let's get some REAL numbers on this bad boy!!
It would be neat to have good solid numbers and then equate them to your car. Your car is pretty darn consistent and works well.....it's a heck of a test bed. From now on you would be able to always know *what does what* on your car and would be able to accurately predict what changes will end up with on the track.
JIM
C'mon Ollie....let's get some REAL numbers on this bad boy!!
It would be neat to have good solid numbers and then equate them to your car. Your car is pretty darn consistent and works well.....it's a heck of a test bed. From now on you would be able to always know *what does what* on your car and would be able to accurately predict what changes will end up with on the track.
JIM
I really need to break in the engine on the dyno as I can't do it in my garage as the neighbors would call the cops on me.. I'd have to break in at 2000+ RPM and there's no way that I can do this in the garage...
Correct break in is critical and I rather spend the money to have it done right..
06-22-2007, 12:23 AM
#12
Race Director
I agree get some concrete numbers, none of this well it did this or did that but it shoulda done this with those. Same thing goes for timeslips, you know that 
I did mine, I took a video, got the dyno printout and posted both when I got home, no doubting what took place there. You know I hate to say it but it's kinda fishy, first you post that it made 563HP and then 10 minutes later it made 590HP with a timing change. Then you say it made 650 tq but the dyno won't record more than 400 Tq, thnk about it if it was someone else posting this what would you think ?
I did mine, I took a video, got the dyno printout and posted both when I got home, no doubting what took place there. You know I hate to say it but it's kinda fishy, first you post that it made 563HP and then 10 minutes later it made 590HP with a timing change. Then you say it made 650 tq but the dyno won't record more than 400 Tq, thnk about it if it was someone else posting this what would you think ?
Last edited by MotorHead; 06-22-2007 at 12:29 AM.
06-22-2007, 06:44 AM
#13
Burning Brakes
The main reason to put the engine on the engine dyno is for break in and to have some kind of idea on how many HP it'll make.. I'll put the car on a chassis dyno afterwards for more useable numbers..
I will video-tape the dyno runs of the 434 so I'll get some idea of the power/torque curve..
I will video-tape the dyno runs of the 434 so I'll get some idea of the power/torque curve..
Any idea on the timing of the testing?
06-22-2007, 06:55 AM
#14
Team Owner
Thread Starter
This will be a nice test -- engine dyno to chassis dyno to 1/4 mile numbers. I hope they are able to get the software issues straightened out before your pull. I can't imagine all their customers accepting verbal outputs for $600......
Any idea on the timing of the testing?
Any idea on the timing of the testing?
I'll ask them to let me look at the software... I'm sure that there is a way to get the power/torque curve with the numbers across the RPM band..
The engine should be tested some time next week.. I'll still have to drop off some parts and more racing fuel for the dyno test..
He will let me know before he will make the pulls and I'll take off work to video-tape the pulls..
06-22-2007, 07:33 AM
#15
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Sorry oliver, i"m going to have to agree with the majority on this. No way would they be using my new dart race motor to try and figure out how to work there new software!!!!!!!!!! No telling how many dyno pulls they made with the 406 trying to figure out the software.
You should be able to go down there and have them show you the run on the computer, it would also have a run number beside it! Now if the 590 hp showed up as run#017 i"d be pissed.
Think about it like this:
When you get married, and take your wife to the hospital, to have your first child, please don"t leave the hospital without the birth certificate.......
david
You should be able to go down there and have them show you the run on the computer, it would also have a run number beside it! Now if the 590 hp showed up as run#017 i"d be pissed.
Think about it like this:
When you get married, and take your wife to the hospital, to have your first child, please don"t leave the hospital without the birth certificate.......
david
06-22-2007, 09:29 AM
#17
Safety Car
They have not worked out their software issues.. Maybe they let me play with the software.. I bet that I'll be able to figure out how to make it work right..
I really need to break in the engine on the dyno as I can't do it in my garage as the neighbors would call the cops on me.. I'd have to break in at 2000+ RPM and there's no way that I can do this in the garage...
Correct break in is critical and I rather spend the money to have it done right..
I really need to break in the engine on the dyno as I can't do it in my garage as the neighbors would call the cops on me.. I'd have to break in at 2000+ RPM and there's no way that I can do this in the garage...
Correct break in is critical and I rather spend the money to have it done right..
After you are done for the day pull the oil filter or drop the pan to check the bearings, change the oil, run the valves, etc.
I forgot one step, after you start it at home bring it up to temp and re-torque the heads.
I do not know why you would guess about the power it will make because the dyno does not work?? I think that motor should make around 700 hp on a dyno that works.
You built your own engine Oliver, you can handle a break in and save your self some money !!
Last edited by 69 N.O.X. RATT; 06-22-2007 at 09:42 AM.
06-22-2007, 10:22 AM
#20
Team Owner
Thread Starter
New race motors with solid roller cams can be broke in in the burn out box, seriously. There is no need to break it in on a dyno if that is the only reason you are doing it. Make sure it will start, take it to the track and doing a little timing, carb tuning, check for leaks, etc. Give it about a 15 second burn out to seat the rings and you are done. This is exactly how I broke in my 454.
After you are done for the day pull the oil filter or drop the pan to check the bearings, change the oil, run the valves, etc.
I forgot one step, after you start it at home bring it up to temp and re-torque the heads.
I do not know why you would guess about the power it will make because the dyno does not work?? I think that motor should make around 700 hp on a dyno that works.
You built your own engine Oliver, you can handle a break in and save your self some money !!
After you are done for the day pull the oil filter or drop the pan to check the bearings, change the oil, run the valves, etc.
I forgot one step, after you start it at home bring it up to temp and re-torque the heads.
I do not know why you would guess about the power it will make because the dyno does not work?? I think that motor should make around 700 hp on a dyno that works.
You built your own engine Oliver, you can handle a break in and save your self some money !!
I can't bring it up to temp at home as the police will show up within minutes.. Can't run the car for more than a minute or 2 and the builder said to run it for 20 minutes before re-torquing the heads... Can't possibly run it 20 minutes in my garage..
Another reason to run it on the dyno is to catch any problem with the engine before installing it the car.. I don't want to spend another Saturday or Sunday pulling out the engine again..
Last edited by GrandSportC3; 06-22-2007 at 10:42 AM.