Troys Toy 455 Dyno Results
#1
Troys Toy 455 Dyno Results
The Build basics
QF 850 BD carb MSD dist mechanical
Performer Intake center section cut 1" clear across.
Procomp heads from Mark
HS roller rockers
Lunati custom grind from Mark 231/238 571/565 @ 50 110 lsa Cam degreed at 106.
Racetec pistons from Mark. 10.22:1 468 ci
Scat Rods, N crank, studs
Melling HV pump stock oil pan.
Vr 1 20w - 50
91 Octane pump gas with a little 93 mixed in at the end.
This may may take me a while to get everything posted. I have two runs the best pull with stock W/Z manifolds, and no adjustments to motor switched to Flowtec Headers 1 3/4
Manifolds 450 Hpr/ 535 trq
Headers 480 Hpr/ 563 trq
Ill post the sheets as fast as I can. A couple of things you will notice is "at temp" should be a question, you'll see why. Melting pump needs purple spring.
BSFC is high. Distributor was never opened, and was fully in at 2500 rpm. I will need to check the bushings and springs, and possibly cut back on the Jets.
Glad to here your thoughts.
QF 850 BD carb MSD dist mechanical
Performer Intake center section cut 1" clear across.
Procomp heads from Mark
HS roller rockers
Lunati custom grind from Mark 231/238 571/565 @ 50 110 lsa Cam degreed at 106.
Racetec pistons from Mark. 10.22:1 468 ci
Scat Rods, N crank, studs
Melling HV pump stock oil pan.
Vr 1 20w - 50
91 Octane pump gas with a little 93 mixed in at the end.
This may may take me a while to get everything posted. I have two runs the best pull with stock W/Z manifolds, and no adjustments to motor switched to Flowtec Headers 1 3/4
Manifolds 450 Hpr/ 535 trq
Headers 480 Hpr/ 563 trq
Ill post the sheets as fast as I can. A couple of things you will notice is "at temp" should be a question, you'll see why. Melting pump needs purple spring.
BSFC is high. Distributor was never opened, and was fully in at 2500 rpm. I will need to check the bushings and springs, and possibly cut back on the Jets.
Glad to here your thoughts.
Last edited by Troys Toy 70; January 17th, 2017 at 08:59 PM. Reason: Comp ratio
#7
Thanks Mark
Before I forget, I want to thank Mark Remmel, it been a great experience and I learned a lot!
Last edited by Troys Toy 70; January 17th, 2017 at 08:57 PM.
#8
Video in a few if the phone will cooperate.
#13
Edit: I should have said the at temp should "not" be a question.
So, I had Mark guide me, my machine shop do the work and another shop do the Dyno.
Dyno operator wants over 200 on the oil temp. That's where he feel optimal power resides. I cannot answer exactly why other than that. At any rate, she is still pulling well even with the heavier load.
I am happy with the motor, and love the sound. I could have listened to it all night long.😃😍
So, I had Mark guide me, my machine shop do the work and another shop do the Dyno.
Dyno operator wants over 200 on the oil temp. That's where he feel optimal power resides. I cannot answer exactly why other than that. At any rate, she is still pulling well even with the heavier load.
I am happy with the motor, and love the sound. I could have listened to it all night long.😃😍
#15
One interesting note 30 increase on both the Hpr and trq with the cheapy headers. I always heard 15 to 20, but she definately like to breath on the exhaust a little more.
#18
Thanks Adam. Again your my hero for the day. Enjoy the status only 1/2 hour left.
It truely was a neat experience, particularly knowing it will be at least a year before I can push the fun pedal.
It truely was a neat experience, particularly knowing it will be at least a year before I can push the fun pedal.
#26
Thanks Luke,
Here are the "non technical goals" as I presented to Mark.
A) above 425 hpr (really like above 450, ultimate 1:1 Hpr/ci) / 525 + torque.
B) Love a good rumble out the pipes, but must be able to be streetable power, pb and air car, th400.
C) If a new Camaro/Challenger/Mustang pulls up next to me, at least it gives them something to think about.😎
My feelings:
A) ✅
B) ✅
C) ✅
Mark was dead on here. Overall, I am a happy boy.
Here are the "non technical goals" as I presented to Mark.
A) above 425 hpr (really like above 450, ultimate 1:1 Hpr/ci) / 525 + torque.
B) Love a good rumble out the pipes, but must be able to be streetable power, pb and air car, th400.
C) If a new Camaro/Challenger/Mustang pulls up next to me, at least it gives them something to think about.😎
My feelings:
A) ✅
B) ✅
C) ✅
Mark was dead on here. Overall, I am a happy boy.
#29
Yeah, that was the first thing I looked for. Thanks for posting both manifold and header configurations. I think that back to back comparison will settle a few bets that have been made over the years.
#30
Now if I had the right springs and bushings in the distributor to come in all in a little slower, and rejet the carb to bring down the Brake Specific number, it may have been a larger gap.
#33
Wow 30 HP and torque over the good BBO manifolds and cheap headers to boot. Wow that is a lot left with manifolds. I have seen the 20 HP and TQ for shorties and mid/high 20's in a SB Dodge magazine test. They started with truck/van manifolds, which suck, had a set, then hi po manifolds and a couple of headers. I was told it was all BS, I would say it was close.
Last edited by olds 307 and 403; January 22nd, 2017 at 12:00 PM.
#35
#36
Wow 30 HP and torque over the good BBO manifolds and cheap headers to boot. Wow that is a lot left with manifolds. I have seen the 20 HP and TQ for shorties and mid/high 20's in a SB Dodge magazine test. They started with truck/van manifolds, which suck, had a set, then hi po manifolds and a couple of headers. I was told it was all BS, I would say it was close.
We did three pulls while bringing the oil temps up. The last two were really close. The Dyno operator turned to me and ask jokingly if I switched motors on him. The Dyno operator, machine shop owner, and myself was surprised by the increase of 30, we all expected 15-20.
Now there are some flow characteristics here that may be different than a stock 455 that may have generated that large
of a gap. It would be interesting to compare a stock type rebuild with manifolds vs headers. That type of build may be closer to the 15-20 gain, but who knows. If someone does have a run like that I would like to see the comparison.
Funny thing is that the dyno and machine shop guys want to know what I am going to do now, as my original plan was to use the manifolds. 15-20 I had determined to not worry about. 30 opens up a whole new discussion.
#38
Now there are some flow characteristics here that may be different than a stock 455 that may have generated that large
of a gap. It would be interesting to compare a stock type rebuild with manifolds vs headers. That type of build may be closer to the 15-20 gain, but who knows. If someone does have a run like that I would like to see the comparison.
of a gap. It would be interesting to compare a stock type rebuild with manifolds vs headers. That type of build may be closer to the 15-20 gain, but who knows. If someone does have a run like that I would like to see the comparison.
http://www.yenko.net/ubbthreads/ubbt...lts#Post666626
You'll find the gain with headers isn't as much as cam overlap decreases. The 10-20 hp range is more likely. It's really a function of the whole combination more than individual parts.
#39
With your aftermarket intake/carb/heads, and a roller cam that has a fair amount of overlap, the headers help a ton. Here's a 4 speed W30 engine that picked up 30 with headers... the 328 cam has a lot of overlap:
http://www.yenko.net/ubbthreads/ubbt...lts#Post666626
You'll find the gain with headers isn't as much as cam overlap decreases. The 10-20 hp range is more likely. It's really a function of the whole combination more than individual parts.
http://www.yenko.net/ubbthreads/ubbt...lts#Post666626
You'll find the gain with headers isn't as much as cam overlap decreases. The 10-20 hp range is more likely. It's really a function of the whole combination more than individual parts.
I wondered when the machine shop had the 110 degreed at 106 how that helped/ hurt total performance. (They did that on their own. One of those things I wished I had aske about.) Still trying to get that straight. Since I am not racing every weekend, and am happy with the build it is more of an effort in understanding on my part.
#40
i'm also still learning so dont take me for granted