Dyno next week!

-
I

Ironmike

Well-Known Member
Joined
Oct 11, 2009
Messages
1,759
Reaction score
566
Location
Western Pa
Hey guys! Wanted to hear what you all think I might have gained HP and what will happen torque-wise with my recent build.

Here's the scoop: Original IMM 410 stroker Scat bottom end, Icon forged pistons

Comp solid flat tappet .565/,565 255 dur @.050
Hughes 1.6 rockers On Brians Indy/RHS heads. unported
RPM AirGap with a HP950, 1 inch spacer
MSD digital 6, TTI stepped headers
9.2ish compression

The above combo made 519HP and 539 ft.lbs, on Brian's dyno... It was a beast in my 4spd Demon 410 gear. Kinda lost a step, so I decided to rebuid and up everythig.

Here's the changes to the above: Total seal gapless rings
Comp solid roller .681/688 269 dur @.050
Super Victor, mild porting,
Sent my heads back to Brian for the full CNC port, and a bit of milling. Gaskets painstakingly cut by me...and every port matched dead on. I used a piece of TIG wire down the ports I couldn't see and made sure there was no "catch". Nice smooth transition from intake to heads. Same carb, went from 78 jets to 80.
So I used the formula after cc'ing my heads and my compression is now 10.62:1. Right about where we wanted.

So, guys it's going to a local dyno next week. What do you think I'll see, numbers wise?
I know what I'm hoping for:prayer:

Here's a few pics just taken an hour ago. It's almost ready to go. Oh. Yeah. That intake looks reeeealy high, but I measured. 4 times. I'm still scared.
 

Attachments

Ironmike said:
Hey guys! Wanted to hear what you all think I might have gained HP and what will happen torque-wise with my recent build.

I know what I'm hoping for:prayer:.
Click to expand...


I know what you're hoping for too! A 6 handle :D. I honestly think you can get there if you're willing to spin it high enough? As far as torque, maybe a few extra lbs/ft about 500rpm's higher.

Best of luck! Let her rip and bring it back home in one piece. :thumbrig:
 
I'll be happy with any of your guesses so far. I'm honestly hoping to see 580HP at 7000, or a shade under. Yeah. Under would be real nice. Also really doing the dyno thing mostly just to break it in and check for leaks. Can't bear the thought of wrestling it in the car and fiinding a nasty oil leak somewhere. You know how it is. We all hate leaks.

Brian didn't flow MY heads, but I heard CNC programs are pretty conisisent. I'm not too educated on numbers, other than breathing is horsepower. These are the numbers posted on Brian's website. Comparing them to ported Eddy's and some W2's, it seems they look pretty good. I just hope I didn't kill all the torque I had. It was fun as hell on the street!

Intake flow@ 28" on a 4.030 bore

.100 68

.200 142

.300 201

.400 249

.500 281

.550 290

.600 296

.650 293

.700 294
 
If your flow numbers are anywhere close to those Mike, i think you'll be in good shape. It's hard to kill the torque numbers with a 4" arm. As I said earlier, even with the "big" cam & intake, they should still be stout, just a little higher on the rpm scale. :)
 
wow, that´s one hefty cam......there must be a really upgraded spring package? I also thought about getting the cnc ported heads (already have the X-heads from Brian), so i´m pretty interested what your combo can do! Good Luck at the dyno!

Here´s a build from Brian using these heads, it should give you an idea:

http://www.forabodiesonly.com/mopar/showthread.php?t=285485

Michael
 
What size carb?

How much did you have to cut out of those rockers to make them clear the springs (I'm assuming you have at least a 1.55" diameter spring on there)?
I'm also guessing you're a around 600# open pressure (or more) on the springs?

I would guess in the 590-610hp range depending on the carb.....and depending on the dyno.
 
I'm going to 2nd 590-610HP, based on what my motor did, and its very close to your setup, and did 585HP on Brian's dyno.
 
Well, Mr Oldman, I'm glad to hear your thoughts about torque. Makes me feel a little better. Torque is ADDICTIVE, man!

And for Mr flyfish, didn't have to TOUCH my Hughes rockers. Plenty of clearance and absolutely the best scrub pattern a guy could want. You're right about open pressure. Around 580lbs. Right about where Hughes wants ya to send back your rockers to get cryo'd.

Same carb. HP 950, 80 jets front and rear, with 2 4.5 power valves.

Here's a couple pics of my springs. 1.35" diameter just under the retainer. I'm not comfortable telling you what they are, I'm not sure if that's an IMM secret or not.
Brian really got this whole Head/spring package worked out.....
 

Attachments

Why not take out second Power valve and up jets? I am going to say 620, it's similar build to the one Brian did for the magazine
 
Damn! Had to check my card. It's 258/268 at .050 110 lobe sep. Come on Brian .001? I knew I wasn't far off. I read the thing like 12 times.
Don't wanna yank the powervalves because of streetability. That may change, though...
 
Ironmike said:
Damn! Had to check my card. It's 258/268 at .050 110 lobe sep. Come on Brian .001? I knew I wasn't far off. I read the thing like 12 times.
Don't wanna yank the powervalves because of streetability. That may change, though...
Click to expand...

Streetability went out the window as soon as you did a 410 lol
 

Well, that's a pretty good range of educated guesses. Ya know, I can't really compare apples to apples. All dynos are different, different air, fuel, etc.
My whole thing is whatever the numbers are/were, I want to pick up an additional 60 horses. I don't think thats too far out of reach. Maybe conservative? I am adding over .100 inches of lift, 10 degrees of duration, almost a point of compression and who knows how much flow. Not to mention going from a flat tappet to a solid roller.

I just hope it survives. I guess next week at this time, I will be posting the results!:happy1:
 
Ironmike said:
Well, that's a pretty good range of educated guesses. Ya know, I can't really compare apples to apples. All dynos are different, different air, fuel, etc.
My whole thing is whatever the numbers are/were, I want to pick up an additional 60 horses. I don't think thats too far out of reach. Maybe conservative? I am adding over .100 inches of lift, 10 degrees of duration, almost a point of compression and who knows how much flow. Not to mention going from a flat tappet to a solid roller.

I just hope it survives. I guess next week at this time, I will be posting the results!:happy1:
Click to expand...

ahhh,so it really hasnt lost anything,you just want more.hp is just like a drug addiction.
 
Yeah, I was curious how many miles you got out of it initially before the engine "kinda lost a step" or did you just get bit by the bug to go faster?!?
 
I think you will hit your goal of 580 hp. you should see a touch over 600 hp and around 550 tq.
 
I say 580-590hp depending on the dyno.. I'm going by what you had before and your upgrades. I say if it put 520hp on Brian's dyno before then it should put down the 580-590 on Brian's dyno again.. Dyno's vary too much and its not a accurate way to calculate your HP gain from your upgrades by testing on 2 different dyno's and 2 different people operating them.. Just my 2 cents.
But the #'s really don't matter. Its the time slips that tell the truth.
 
No, it did lose a step after the first summer. Probably 1800-2000 miles and maybe 10 passes. That's a moot point now , because YEAH, I wanna go faster! I mean really...who doesn't?

It was actually very streetable and I think it will be after the upgrades. Around here, when spring hits we drive, man. Long drives, traffic, 90 degrees outside, never had a problem. My car never goes out without getting "thrashed" a bit. That's what it's for. Wifey loves it maybe more than me. Too bad she can't drive a stick. Hehe.
 
Ironmike said:
Hey guys! Wanted to hear what you all think I might have gained HP and what will happen torque-wise with my recent build.

Here's the scoop: Original IMM 410 stroker Scat bottom end, Icon forged pistons

Comp solid flat tappet .565/,565 255 dur @.050
Hughes 1.6 rockers On Brians Indy/RHS heads. unported
RPM AirGap with a HP950, 1 inch spacer
MSD digital 6, TTI stepped headers
9.2ish compression

The above combo made 519HP and 539 ft.lbs, on Brian's dyno... It was a beast in my 4spd Demon 410 gear. Kinda lost a step, so I decided to rebuid and up everythig.

Here's the changes to the above: Total seal gapless rings
Comp solid roller .681/688 269 dur @.050
Super Victor, mild porting,
Sent my heads back to Brian for the full CNC port, and a bit of milling. Gaskets painstakingly cut by me...and every port matched dead on. I used a piece of TIG wire down the ports I couldn't see and made sure there was no "catch". Nice smooth transition from intake to heads. Same carb, went from 78 jets to 80.
So I used the formula after cc'ing my heads and my compression is now 10.62:1. Right about where we wanted.

So, guys it's going to a local dyno next week. What do you think I'll see, numbers wise?
I know what I'm hoping for:prayer:

Here's a few pics just taken an hour ago. It's almost ready to go. Oh. Yeah. That intake looks reeeealy high, but I measured. 4 times. I'm still scared.
Click to expand...

What valve covers are those?
 
You must log in or register to reply here.
-

Similar threads

rmchrgr
416" on the dyno
2 3 4 5 6
Replies
127
Views
5K
HuntedDuckV351
HuntedDuckV351
R
Mild 408 W/1.88" Valves
Replies
12
Views
2K
Garrett Ellison
Garrett Ellison
srduster340
Only 460hp
2 3 4 5 6
Replies
135
Views
16K
MOPAROFFICIAL
MOPAROFFICIAL
Whatsup1962
408 build and results.
2
Replies
32
Views
6K
Jarlaxle
Jarlaxle
101proof
  • Locked
[FOR SALE] 1972 Dodge Demon B5 Blue 408 Stroker $28,500
Replies
5
Views
5K
101proof
101proof
Back
Top Bottom