Best Engine for Class Rules below, not Drag Racing

Billy Nees · 08-22-2011, 07:42 AM

First thing that came to my mind was 429/460 Ford.

Adger Smith · 08-22-2011, 08:38 AM

429/460 = #25

I like the 70 mod LS-6 BB or even the '69 427 425 hp BB
The conventional vortec BB might work, I have no experience with those BB heads, but if they are as good an upgrade as the SB Vortec it might work.
The later Vortec 8100 has cast heads and could be the ticket, but it's 4.25 bore and 4.37 stroke makes it go about 10 over the cu in limit. Not sure if the induction would work, either. Destroke?
If you like later mods then the LS truck engine w/ iron heads:

Casting Number 373
Head: 1999-2000 LQ4 6.0 Litre Truck
Material: Cast Iron
Part Number:
12561873
Combustion Chamber Volume: 71.06cc
Compression Ratio: 9.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
There is a thread on one of the LS forums that says the iron head can be made just as good as the LS-4 head can. There is a nice 4 BBl intake avaliable for them,too. Put those iron heads on a block with a larger bore and stroke it a little.. Let it fly!!
What is the most common engine being used?

Daran Summerton · 08-22-2011, 08:42 AM

429 was my first thought, scary! If you are limited to production cyl. heads find the Biggest made!

Ed Fernandez · 08-22-2011, 11:47 AM

Cummins in a Ram p/u.You did say pulling didn't you?:>):>):>)

Alan Roehrich · 08-22-2011, 01:10 PM

Provided you can run an OEM replacement block, such as a BowTie, and you're willing to spin the thing up, a 4.5 bore 9.8" deck BowTie block with a 3.76" stroke crank (396/427) gives you 478 cubic inches. You can get real close to a 6.7" rod in that, allowing you to run a really light piston with a good ring package.

A set of 990 castings for the heads, since it says OEM castings and no aluminum (you'd need a cylinder head guy capable of Super Stock national record holder quality work). Probably a Super Victor Dominator pattern intake, and since they allow any single four barrel carburetor, you could talk to the guys at Quick Fuel about a really big Dominator pattern carburetor.

I see no valve train rules, so I'd be looking at a big core (54MM) roller cam, 0.904" roller lifters, Jesel belt drive and shaft mount rockers.

You have a really good choice of parts when you run a combination like that. Of course, with that big bore, short stroke, and long rod, that's a high RPM (8500 or higher) and wheel speed combination, not a "dead hook" combination.

Clay Arnett · 08-22-2011, 04:52 PM

For truck pulling all these engine options are no good. 12 valve ISB Cummins only way to go!

Mark Walton · 08-23-2011, 01:46 PM

How about an iron headed 426 style Hemi?

08-22-2011, 07:42 AM	#1
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,495 Likes: 3,600 Liked 7,741 Times in 1,740 Posts	Re: Best Engine for Class Rules below, not Drag Racing First thing that came to my mind was 429/460 Ford. __________________ Billy Nees 1188 STK, SS I'm not spending 100K to win 2K

08-22-2011, 08:42 AM	#3
Daran Summerton Senior Member Join Date: Jun 2003 Location: Las Vegas nv Posts: 600 Likes: 18 Liked 66 Times in 37 Posts	Re: Best Engine for Class Rules below, not Drag Racing 429 was my first thought, scary! If you are limited to production cyl. heads find the Biggest made! __________________ 72 cutlass

08-22-2011, 11:47 AM	#4
Ed Fernandez Veteran Member Join Date: Nov 2001 Location: NOO JOISEY nexta NOO YAWK Posts: 5,879 Likes: 38 Liked 100 Times in 45 Posts	Re: Best Engine for Class Rules below, not Drag Racing Cummins in a Ram p/u.You did say pulling didn't you?:>):>):>) __________________ Former NHRA #1945 Former IHRA #1945 T/SA

08-22-2011, 01:10 PM	#5
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,115 Likes: 1,572 Liked 1,829 Times in 414 Posts	Re: Best Engine for Class Rules below, not Drag Racing Provided you can run an OEM replacement block, such as a BowTie, and you're willing to spin the thing up, a 4.5 bore 9.8" deck BowTie block with a 3.76" stroke crank (396/427) gives you 478 cubic inches. You can get real close to a 6.7" rod in that, allowing you to run a really light piston with a good ring package. A set of 990 castings for the heads, since it says OEM castings and no aluminum (you'd need a cylinder head guy capable of Super Stock national record holder quality work). Probably a Super Victor Dominator pattern intake, and since they allow any single four barrel carburetor, you could talk to the guys at Quick Fuel about a really big Dominator pattern carburetor. I see no valve train rules, so I'd be looking at a big core (54MM) roller cam, 0.904" roller lifters, Jesel belt drive and shaft mount rockers. You have a really good choice of parts when you run a combination like that. Of course, with that big bore, short stroke, and long rod, that's a high RPM (8500 or higher) and wheel speed combination, not a "dead hook" combination. __________________ Alan Roehrich 212A G/S

08-22-2011, 04:52 PM	#6
Clay Arnett Member Join Date: Jul 2002 Location: Hartsville, IN Posts: 128 Likes: 0 Liked 0 Times in 0 Posts	Re: Best Engine for Class Rules below, not Drag Racing For truck pulling all these engine options are no good. 12 valve ISB Cummins only way to go!

08-22-2011, 08:38 AM	#2
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Best Engine for Class Rules below, not Drag Racing 429/460 = #25 I like the 70 mod LS-6 BB or even the '69 427 425 hp BB The conventional vortec BB might work, I have no experience with those BB heads, but if they are as good an upgrade as the SB Vortec it might work. The later Vortec 8100 has cast heads and could be the ticket, but it's 4.25 bore and 4.37 stroke makes it go about 10 over the cu in limit. Not sure if the induction would work, either. Destroke? If you like later mods then the LS truck engine w/ iron heads: Casting Number 373 Head: 1999-2000 LQ4 6.0 Litre Truck Material: Cast Iron Part Number: 12561873 Combustion Chamber Volume: 71.06cc Compression Ratio: 9.5:1 Intake Port Volume: 210cc Exhaust Port Volume: 75cc Intake Valve Diameter: 2.00 inches Exhaust Valve Diameter: 1.55 inches There is a thread on one of the LS forums that says the iron head can be made just as good as the LS-4 head can. There is a nice 4 BBl intake avaliable for them,too. Put those iron heads on a block with a larger bore and stroke it a little.. Let it fly!! What is the most common engine being used? __________________ Adger Smith (Former SS)

08-23-2011, 01:46 PM	#7
Mark Walton Junior Member Join Date: Mar 2002 Location: Kansas Posts: 39 Likes: 0 Liked 0 Times in 0 Posts	Re: Best Engine for Class Rules below, not Drag Racing How about an iron headed 426 style Hemi? __________________ Mark Walton 5789 SS, STK