 
Main Menu
|
|
Nevada Classics
|
|
Advertise at CC
|
|
June 2024
|
| S |
M |
T |
W |
T |
F |
S |
| |
|
|
|
|
|
1 |
| 2 |
3 |
4 |
5 |
6 |
7 |
8 |
| 9 |
10 |
11 |
12 |
13 |
14 |
15 |
| 16 |
17 |
18 |
19 |
20 |
21 |
22 |
| 23 |
24 |
25 |
26 |
27 |
28 |
29 |
| 30 |
|
|
|
|
|
|
|
|
CC Advertisers
|
|
03-22-2009, 08:09 AM
|
|
CC Member
|
|
|
Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
|
|
Not Ranked
I had a kinda cool engine on the dyno this week
I posted this on the "other forum" but thought it would be equally - or more - interesting to the Cobra crowd here.This was a fairly complicated - but very much street oriented build.
All aluminum 427 (actually 429 with 4.25 bore and a 3.78) stroke with a Pond Block and CNC ported early generation Blue Thunder medium riser heads. Compression for pump gas, and a very small solid roller - 234/240 @ .050 & under .600 lift. Also has very high quality components throughout - including coated custom pistons, impinged titanium retainers, and a billet crank. Modest horsepower targets but very high durability. Oh - almost forgot the TWM Weber style electronic fuel injection system up on top. It will end up in a street rod with no hood - so all the cool stuff will be on display.
The power was good considering the cam - peaking at 530 on one pull, and repeating at 528-529 on subsequent pulls. Of note is that - with the IR setup, good heads and a small cam - the power never really dropped off like you see in many other combinations. It just sort of "hung there" between 533 and 526 for +/-700RPM. It also had a nice strong & flat torque curve peaking at 505 on one pull - approaching 1.2/cube is pretty decent for a street engine.
It was very interesting to compare this to a 445 cube stroked 390 EFI engine we did, as well as a 2x4 427 with 12.5:1. This one has a smoother power band - matching or beating the peaks of both the bigger engine and the racier flavor, while being easier on street manners. Of course it cost about the same as both the others together...
I have a pic and dyno chart below and have posted a dyno pull of this engine to youtube (my first try at that). I won't know if that link works until I try it.... The induction noise was "significant"  . You also have a lot of noise from the fans in the dyno room...
http://www.youtube.com/watch?v=PvZAS...e=channel_page
Barry Rabotnick
Survivalmotorsports.com
__________________
Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
Last edited by Barry_R; 03-22-2009 at 08:12 AM..
|
03-22-2009, 08:26 AM
|
|
CC Member
|
|
|
Join Date: Oct 2003
Posts: 4,078
|
|
Not Ranked
Barry,
Beautiful job and torque curve. This one is begging for more cam. HP not nosing over at 6500. With an aggressive cam and no other changes, might this do 50-75 points higher on each?
Also is that a DTS?
__________________
Chas.
|
03-22-2009, 08:36 AM
|
|
CC Member
|
|
|
Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
|
|
Not Ranked
It is a DTS
I had to push the customer to go that far on the cam - he was extremely concerned about lowend and driving characteristics. I can only guess - but those heads will support over 700HP - so a bigger stick would certainly help get us closer to or over 600. The TQ won't move much higher though...
__________________
Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
|
03-22-2009, 08:37 AM
|
 |
CC Member
|
|
|
Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
|
|
Not Ranked
The header tubes look small???
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
|
03-22-2009, 09:02 AM
|
|
CC Member
|
|
|
Join Date: May 2005
Location: Riverside,
CA
Cobra Make, Engine: Cutting Edge, Boss 429
Posts: 377
|
|
Not Ranked
Very nice motor. Looks great too |
03-22-2009, 09:13 AM
|
 |
CC Member
|
|
|
Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,652
|
|
Not Ranked
Very impressive Barry! That one should be a blast to drive with a torque curve like that.
When you get a chance take a look at the alternator as you bring the engine speed up. It starts to move around. It may have been loose or perhaps some part of the mount is flexing.
The engine is visually stunning, definitely high bling!
Ed
__________________
Help them do what they would have done if they had known what they could do.
|
03-22-2009, 09:58 AM
|
|
CC Member
|
|
|
Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
|
|
Not Ranked
The alternator bracket is an out of the box March part. It uses heim joints for the adjustment and obviously needs rearward bracing for rigidity.
__________________
Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
|
03-22-2009, 12:40 PM
|
 |
CC Member
|
|
|
Join Date: Oct 2008
Location: Avon,
NY
Cobra Make, Engine: 1969 Mustang Fastback Pro-Street, constantly changing ongoing project!
Posts: 746
|
|
Not Ranked
Barry, Nice Motor!
__________________
Mick
(Of The Troops & For The Troops)
Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body; but rather a skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, WHAT A RIDE!"
|
03-23-2009, 06:45 AM
|
 |
Senior Club Cobra Member
|
|
|
Join Date: Feb 2006
Location: Melbourne,
VIC
Cobra Make, Engine: RMC, carb 347 TopLoader and Jag running gear ~ so old school I time it with an hour-glass :D
Posts: 1,293
|
|
Not Ranked
Thanks for posting this Barry
Its always interesting to see what people are doing and the results that they're getting - especially when it looks this good
LoBelly |
03-23-2009, 07:50 AM
|
 |
Senior Club Cobra Member
|
|
|
Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
|
|
Not Ranked
Barry-
Looks like you hit a homerun with that one. And boy do those TWMs look good!
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
|
03-23-2009, 08:38 AM
|
|
CC Member
|
|
|
Join Date: Mar 2001
Location: E BRUNSWICK N.J. USA,
Posts: 3,841
|
|
Not Ranked
Nice Barry
Barry_R What size are those TWM throttle bodies? RickL. Ps I also have some more ideas for the EMC. Need to know about the power to the motor issue |
03-23-2009, 09:07 AM
|
|
CC Member
|
|
|
Join Date: May 2000
Location: London,
UK
Cobra Make, Engine: Dreaming of a 427 Competition car...
Posts: 123
|
|
Not Ranked
One word - STUNNING! An engine like this is in my future, that's for certain. 
Paul
__________________
1966 Singer Chamois (Hillman Imp) - full race 930cc
1975 Triumph Stag - 3.0-litre
2003 Vauxhall Vectra GSi 3.2 V6
|
03-23-2009, 11:36 AM
|
 |
CC Member
|
|
|
Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
|
|
Not Ranked
Barry,
Looks fantastic, all flat aluminum.
What management system is used for the TWM injection?
Eric
|
03-23-2009, 11:48 AM
|
|
CC Member
|
|
|
Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
|
|
Not Ranked
Its a street rod - he wanted the "sound".....
__________________
Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
|
03-27-2009, 03:29 AM
|
|
CC Member
|
|
|
Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
|
|
Not Ranked
Which solid rollers did you use?
Quote:
Originally Posted by Chaplin
Barry-
One more question for you. Since this is going to be a street motor, why didn't use a hyd roller instead of the solid roller?
|
Quote:
Originally Posted by Barry_R
Its a street rod - he wanted the "sound".....
|
Depending upon the valve lash setting ( 0.015 vs 0.020 ) , the engine may not be very friendly if you try to start it in colder 35 degree weather. If I remember correctly, my lash is 0.012" tighter at 70 degrees.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
|
03-27-2009, 04:30 AM
|
|
CC Member
|
|
|
Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
|
|
Not Ranked
Lash was at .003-.004 in the shop at +/-60 degrees. I don't expect that the car will see much winter driving - but starts in 30 degrees could be an issue.
__________________
Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
|
03-27-2009, 04:36 AM
|
|
CC Member
|
|
|
Join Date: Mar 2001
Location: E BRUNSWICK N.J. USA,
Posts: 3,841
|
|
Not Ranked
Morning Barry
Barry_R Barry what size where the TWM's and size of injectors where you running? Rick
|
03-27-2009, 07:46 AM
|
|
Senior Club Cobra Member
|
|
|
Join Date: Dec 2000
Cobra Make, Engine: 2008 Shelby GT500
Posts: 235
|
|
Not Ranked
And now for the 64 million dollar question: What does in cost to build that motor?
FIA Mike
|
03-27-2009, 09:37 AM
|
 |
CC Member
|
|
|
Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,281
|
|
Not Ranked
Quote:
Originally Posted by FIA Mike
And now for the 64 million dollar question: What does in cost to build that motor?
FIA Mike
|
...less than the federal tax on the average AIG bonus 
__________________
Too many toys?? never!
|
03-27-2009, 03:33 PM
|
|
CC Member
|
|
|
Join Date: Jul 2003
Location: West Bloomfield,
MI
Cobra Make, Engine:
Posts: 717
|
|
Not Ranked
I can't remember the throttle size - I haveta go and look...
Those are 42 pound injectors. I remember that. We were on the cusp on the size if the motor got closet to 550 HP - but decided to "push" the 42s with more pressure if necessary so we could keep good idle speed control. We ended up plenty safe at 45 pounds pressure. And it idled really nicely.
As for the cost - 64 million is close. But just under 30 grand is closer. A big piece of that is the injector/intake/EFI concoction.
__________________
Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -7. The time now is 02:37 PM.
|
Hybrid Mode
