[mike leech]

Dono. Some time in the last 8 years.

[NHRASuperStock455SD]

Dynoed Friday and Monday. This engine wants way more fuel than last year.

We through everything we had and it makes very good power. This meant 68 primary jets and 0.028 rods in the back. We recorded 683.7 HP.

Tony said definitely the dyno with the new controls is down 30HP. This means 713 horsepower compared to 691 Super Stock form regular fuel. We are just a few short of Phillip Monteiths engine and weigh 80lbs less in the same class.

We are struggling to achieve fuel to #5 & #7. When we get there so it doesnt miss, then 1,2 & 4 are really fat. We could gain another 15-20HP with balancing the fuel so we will continue work in the car.

4000 feet plus add day. O2 on all 8 cylinders, the variations are shown along with dyno and other info. We are a strong 20HP better, and maybe a few more with more tuning. The killer springs and bigger intake plenum gave us way more top end....look at 7300 and 7400! For a 455SD?

[Skip Fix]

"We are struggling to achieve fuel to #5 & #7. When we get there so it doesnt miss, then 1,2 & 4 are really fat. We could gain another 15-20HP with balancing the fuel so we will continue work in the car."

Playing with plenum/runner lengths,stagger jetting?

[NHRASuperStock455SD]

Originally Posted by Skip Fix

"We are struggling to achieve fuel to #5 & #7. When we get there so it doesnt miss, then 1,2 & 4 are really fat. We could gain another 15-20HP with balancing the fuel so we will continue work in the car."

Playing with plenum/runner lengths,stagger jetting?

Yes that is probably the answer. Thanks for the comment. It took 1.5 days at $600 per day just to get a full pull. Our biggest issue seems to be front to back, but yes the odd cylinders are way leaner than the even ones. It is really hard to pull the intake and change the flow dividers while paying $600 a day dyno time.

Phillip says to put the short runner Tomahawk intake intake on it, but he has never done the 8 Ox sensors either. His combo is with Eheads 440 cubes, 13 to one compression. For us to be that close with cast iron at low 9 to one-ish is a blessing.

[potentpontiac]

Very Impressive #'S Lynn. Should be very competitive at the track. Post results when you get out with the new combo. How big is the plenum area at the top of the Victor??

[Skip Fix]

Just put a dyno in the garage Lynn! Maybe line up a few different intakes with different lengths and swap on the dyno-might be cheaper for extra intakes than a second day dyno fee. I've got a Tomahawk I can lend you and a couple of Victors.

Cant that carb spacer side to side to bias the odds?

[NHRASuperStock455SD]

Well we are back from Indy with a best time of 9.59@139.42. BES was exemplary in there work with the items we listed.

There were at least 10 stock\super stock cars there using BES. They are simply the best. Tony told Casey under the current rules we have 50HP left in this combo.

The good news is we had a studder off the starting we think coming from Qjet. We also saw 14 to 14.5 to one in #5 & #7 cylinders. To keep them from popping we had to richen #1 & #2 cylinder to 11.5 to 12 to one. We believe straightening this imbalance will put that same run into the 9.40s.

Since this was all done at 3500 feet corrected altitude we hope to run close to record setting times at Indy in October. We will post progress and test results in the next few weeks in our chase to make the cast iron headed low compression 455SD the record holder!

[NHRASuperStock455SD]

New best! This 455SD just wont quit! We are struggling to get fuel to the secondaries. We are running cc rods (0.030 rods) in the back, 71 jets in the front with no metering rods, and B hanger.....damn thing wants more fuel!

This run hit the 8200 rev limiter at about 1200 feet. I guess we need a 8500-9000 chip! It popped at the top of first gear and again at the top of second indicating lean conditions.

We are very rich in the front just to get enough fuel to the rear. It is 12 to one in 1 & 2 cyl and it is 14 to one in 5 & 7 cyl. I think I need a bucket of fuel and a tipping bracket. Tony says we have another 15-20HP in just balancing out the Q-jet front to back. Right now it is front end loaded just to get down the track and keep 5 & 7 from detonating.

Keep in mind it is very lean off the starting line so it isnt leaving good, we ran 1.28 all year last year.

[Skip Fix]

"This run hit the 8200 rev limiter at about 1200 feet."

But everyone knows an iron headed Qjet 455 needs to be shifted at 5500!

[taff2]

Would moving the carb sideways and/or rearwards(on a spacer) towards the odd firing cylinders help?

[Half-Inch Stud]

I lost track of the Intake manifold on your engine. Victor Single-Plane? if so, can you report on the port flange CSA?

7 robs 5: Can a longer 5-7 divider be implemented?
divider must be super-stiff & strong or it will get eaten up. Welded-in aluminum.

Equal Mixture Distribution: How about a monsterous dual-plane? My Spreadbore P4B ported out real well to 2.8"min CSA with excellent runner funnels, no breakouts or epoxy. More CSA than the RAIV Intake. Takes Q-JET or Holley 1050 on open spacer. Means you could grind a Spreadbore P4B up to equal the Victor CSA? Something tells me your RPMs are beyong the Dual-plane, butt hay who has tried??

[Half-Inch Stud]

Leave the Sec Rods out?

Play every Fuel bowl volume game (drill access to the side-wells to increase fuel bowl volume, aim low).

[67cruiser]

Sure would like to see how the JB weld was poured, question never answered, over tape?? screen??? Do tell.

[NHRASuperStock455SD]

Originally Posted by taff2

Would moving the carb sideways and/or rearwards(on a spacer) towards the odd firing cylinders help?

Good suggestion might try some of that down the road. ;We talked to tony about that but now we are impeding flow.

[NHRASuperStock455SD]

Originally Posted by Half-Inch Stud

I lost track of the Intake manifold on your engine. Victor Single-Plane? if so, can you report on the port flange CSA?

7 robs 5: Can a longer 5-7 divider be implemented?
divider must be super-stiff & strong or it will get eaten up. Welded-in aluminum.

Equal Mixture Distribution: How about a monsterous dual-plane? My Spreadbore P4B ported out real well to 2.8"min CSA with excellent runner funnels, no breakouts or epoxy. More CSA than the RAIV Intake. Takes Q-JET or Holley 1050 on open spacer. Means you could grind a Spreadbore P4B up to equal the Victor CSA? Something tells me your RPMs are beyong the Dual-plane, butt hay who has tried??

The victor is the intake of choice yes we can change porting but tony says it will all hurt flow so we will try carb stuff first. Northwind looks good but we would have to develop it. My other 455sd prob will get a sheet metal.

[NHRASuperStock455SD]

Originally Posted by 67cruiser

Sure would like to see how the JB weld was poured, question never answered, over tape?? screen??? Do tell.

Sorry, we tape the holes with duct tape and pour away. Go slow cause when it dries you have to chisel away like concrete. After doing this you realize how not an issue it is coming out if the surface is clean. Next time I will coat the surface w a very light film wd40 where I dont want epoxy to make clean up easier.

[NHRASuperStock455SD]

Brad Urban from "The Carburetor Shop" sent me a kit 20 years ago that i never used. You epoxy the secondary emulsion tubes and redrill them. He never explained the process to me so i never did it.

Thanks to Todd Hoven he reminded me of this process so here we go. Todd says to measure the orifice size and it need to be about 0.020. Mine were about 0.035. Back to the track.

[JY455V4-Z]

Originally Posted by NHRASuperStock455SD

Brad Urban from "The Carburetor Shop" sent me a kit 20 years ago that i never used. You epoxy the secondary emulsion tubes and redrill them. He never explained the process to me so i never did it.

Thanks to Todd Hoven he reminded me of this process so here we go. Todd says to measure the orifice size and it need to be about 0.020. Mine were about 0.035. Back to the track.

no different than a "high speed" air bleed for a holley... smaller puts a stronger signal on the circuit..