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Hemi project almost done #2714253
11/09/19 02:02 PM
11/09/19 02:02 PM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
I had posted on here the issues that I had with a previous build. Bob Meyers at Performance Automotive in Greenville TN is close to finishing the engine.
To go back, the engine had the wrong main bearings, the cylinder walls had no finish, and Bob had to replace everything in the heads except the castings!
Here are some photos. So the combo is as follows:
4.360” bore
4.50” stroke
10.2 Compression Coated Diamond pistons
MP heads ported by Bob (340 cam intake @ actual cam lift)
MP “Marine intake with two Holly 750 vacuum secondary carbs
248 I and 254 E @ .050 with .585 net lift on 112 LC solid roller cam
Small TTI street headers.

This engine is going in a 4,100 lb 66’ Coronet STREET car with 3,54 gears and Gear Vendor.

It is strictly a pump gas cruiser.

Any guess as to how much HP it will Dyno at?

35D302B1-94E5-4AE8-B448-3A393230BFBD.jpeg471E7B16-5541-4EE2-B594-C6B34AD8E263.jpeg32A28775-4595-4FBE-84D8-59225F26DEBA.jpeg
Re: Hemi project almost done [Re: Hemi ragtop] #2714256
11/09/19 02:08 PM
11/09/19 02:08 PM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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fast68plymouth Offline
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Is it going on the dyno?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Hemi project almost done [Re: fast68plymouth] #2714260
11/09/19 02:14 PM
11/09/19 02:14 PM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
Yes, it will be Brocken in, tuned with A/F sensors and then power pulls

Re: Hemi project almost done [Re: Hemi ragtop] #2714270
11/09/19 03:05 PM
11/09/19 03:05 PM
Joined: Jan 2003
Posts: 30,947
Oregon
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AndyF Offline
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Oregon
4.5 inch stroke? Wow, it should make some torque. Not sure about the HP but it will definitely make some torque. Were you able to fit an internal oil pickup tube around the 4.50 inch stroke? I see the external line so I'm guessing you removed the internal pickup and are external only?

Last edited by AndyF; 11/09/19 03:06 PM.
Re: Hemi project almost done [Re: AndyF] #2714288
11/09/19 04:54 PM
11/09/19 04:54 PM
Joined: Jan 2012
Posts: 2,603
Stuttgart, Arkansas
rickseeman Online content
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rickseeman  Online Content
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Stuttgart, Arkansas
600 HP tire smoking ditch cleaner outer.


2011 Drag Pak Challenger
Re: Hemi project almost done [Re: AndyF] #2714309
11/09/19 06:05 PM
11/09/19 06:05 PM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
Originally Posted by AndyF
4.5 inch stroke? Wow, it should make some torque. Not sure about the HP but it will definitely make some torque. Were you able to fit an internal oil pickup tube around the 4.50 inch stroke? I see the external line so I'm guessing you removed the internal pickup and are external only?


Yes I have a external swinging pickup with baffles.

Re: Hemi project almost done [Re: Hemi ragtop] #2714404
11/10/19 12:14 AM
11/10/19 12:14 AM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Cab_Burge Offline
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Whos heads are they? Where they flowed at 28. inches of water?
I'm going to take SWAG and say if it doesn't make 600 HP with those parts something is drastically wrong shruggy
I've made 600+ HP on CA pump swill with a 472 C.,I street hemi motor with iron heads and a stock intake with a set of stock (jetted better)1966 Street hemi Carter AFB years ago, that motor had a half way decent solid lifter flat tappet street cam in that motor also, I don't remember the exact specs now though, sorry blush
Be ready for instant tire smoke work up devil boogie

Last edited by Cab_Burge; 11/10/19 12:15 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Hemi project almost done [Re: Cab_Burge] #2714416
11/10/19 01:22 AM
11/10/19 01:22 AM
Joined: Nov 2013
Posts: 675
Southern Alberta
Uberpube Offline
mopar
Uberpube  Offline
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Joined: Nov 2013
Posts: 675
Southern Alberta
686.3

Re: Hemi project almost done [Re: Cab_Burge] #2714433
11/10/19 07:18 AM
11/10/19 07:18 AM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
Cab, The heads are Mopar Performance. Some of the last ones Mancini had, 2009?

Re: Hemi project almost done [Re: Hemi ragtop] #2722244
12/07/19 10:38 AM
12/07/19 10:38 AM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
So to continue, The engine is done, tuned and has made power pulls. The result? 665 HP @ a street friendly 5,900 rpm. 679 ft. Lb. of torque @ 4,400 rpm. To emphasize the “street” build, it made right at 500 HP @ 4,000 rpm.
These #s represent the engine installed in the car. Small TTI headers, Dual plane intake, and run on pump 93 octane from a station just down the road from the shop!

12E5DBFA-2B34-40C3-B759-6D8EA1F39580.jpeg7C5DAC9E-7CA6-4451-9573-87A7FF677416.jpeg6F7C88A7-7699-460F-87F1-E53E0F78BBA2.jpeg
Re: Hemi project almost done [Re: Hemi ragtop] #2722250
12/07/19 11:03 AM
12/07/19 11:03 AM
Joined: Jul 2004
Posts: 3,799
Arlington, Texas
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bobby66 Offline
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Arlington, Texas
That's a beautiful car! up

Re: Hemi project almost done [Re: bobby66] #2722254
12/07/19 11:14 AM
12/07/19 11:14 AM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
Thanks, that picture was taken on my phone at the “cruising the coast” show.

Re: Hemi project almost done [Re: Hemi ragtop] #2722256
12/07/19 11:18 AM
12/07/19 11:18 AM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline
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Man that car would be a blast to cruise. Nice numbers, should be real hard on tires lol.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Hemi project almost done [Re: Hemi ragtop] #2722261
12/07/19 11:24 AM
12/07/19 11:24 AM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
Perhaps I shouldn’t post details of this engine on a “racing” forum, but I enjoy reading the technical info posted here and thought you might be interested in a “slightly different” build.
This engine was built for a real “street” car that weighs 4,175lb, has a 727 with the tightest possible 11” converter, 3.54 gears and a Gear Vendor overdrive.
So, torque, high idle vacuum for the power disk brakes, low speed drivability, low maintenance and the ability to buy gas anywhere I happened to find myself, were the priorities.
All the clearances were set on the tight side. Diamond coated 4032 allow pistons were chosen for the tight .003-.0035 piston to wall clearance were used. All the bearings are coated, a Napier second ring was used for oil control.
The engine will run full. Synthetic low viscosity oil and pump gas.

Re: Hemi project almost done [Re: Hemi ragtop] #2722265
12/07/19 11:27 AM
12/07/19 11:27 AM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline
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Unlawful's Race & Engine tech, I think your threads fit in here just fine.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Hemi project almost done [Re: Hemi ragtop] #2722267
12/07/19 11:30 AM
12/07/19 11:30 AM
Joined: Feb 2014
Posts: 1,695
central il.
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second 70 Offline
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central il.
I bet there's more power in it if you get the AFR closer to 13-13.5 -1. Glad to see you will be able to enjoy your car.

Re: Hemi project almost done [Re: Hemi ragtop] #2722271
12/07/19 12:04 PM
12/07/19 12:04 PM
Joined: Feb 2008
Posts: 452
Monrovia, So-Cal, USA
racerhog Offline
mopar
racerhog  Offline
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Posts: 452
Monrovia, So-Cal, USA
Very nice Job.... Hope it last a long life and gives you good service.... Keep us posted on the driving part !!!! smile
Mopar On !!!


Bob(Cowboy)Hogan
Monrovia So-Cal
Re: Hemi project almost done [Re: Hemi ragtop] #2722289
12/07/19 01:14 PM
12/07/19 01:14 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Cab_Burge Offline
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The brake specifics look a little rich, it might run better in the car with the hood closed a little leaner, especially at light part throttle cruise work scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Hemi project almost done [Re: Cab_Burge] #2722331
12/07/19 03:57 PM
12/07/19 03:57 PM
Joined: Mar 2010
Posts: 984
Tennessee
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Hemi ragtop Offline OP
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Tennessee
Cab, thanks for the observation. On a street car that spends a lot of time at part throttle, I am a firm believer in vacume advance. I have an adjustable unit and I run quite a lot of advance with it. Extra timing at part throttle will lean out the AF quite a bit so we will see.
I am planning on installing AF gauge in the car so I can see what “real world” is

Re: Hemi project almost done [Re: Hemi ragtop] #2722764
12/09/19 03:32 PM
12/09/19 03:32 PM
Joined: Jan 2003
Posts: 17,800
S.E. Michigan
ZIPPY Offline
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S.E. Michigan
Nice work


Rich H.

Esse Quam Videri




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