Search found 2158 matches

by pmuller9
Sun Sep 23, 2018 10:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 274
Views: 16661

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Now you can see just how a quality Ford OEM casting should look with consistent (wall thickness) throughout the casting. This will serve as an excellent guide for our** in progress** max flow SVO Sr head development. Yes we are getting there; hope to finalize our Sr. head design by years end so we c...
by pmuller9
Sun Sep 23, 2018 11:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 219
Views: 21307

Re: 300 I6 EFI performance upgrades

Thanks for taking the time and cost of starting a dyno comparison.
This is great info!
by pmuller9
Sat Sep 22, 2018 12:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Replacement fuel injectors
Replies: 9
Views: 212

Re: Replacement fuel injectors

At small throttle cruising conditions the EFI system runs closed loop using a narrow band O2 which means it will be running stoichiometric as you stated. When the EGR is active, the intake charge is diluted with exhaust gas and the oxygen content is lowered. The system still maintains a stoich A/F r...
by pmuller9
Fri Sep 21, 2018 9:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 4.9 I6 upgrades
Replies: 11
Views: 338

Re: 1988 4.9 I6 upgrades

jackbeel wrote:Update: This essentially what I'll be adding along with some head work.
https://www.summitracing.com/cart

Any opinions?

The summit racing shopping cart is empty with nothing to see.
What did you want to show us?
by pmuller9
Fri Sep 21, 2018 1:21 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo Header Design
Replies: 13
Views: 166

Re: Turbo Header Design

It is tough trying to work around the motor mount. You could make a different style mount to give you more room. You would like to have equal length tubes and if the turbo is down by the starter, tubes 4,5,6 could swing forward before turning down and back along side tubes 1,2,3. If you go with a re...
by pmuller9
Fri Sep 21, 2018 1:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New motor for the Red Rocket! Need some advice! Please help!
Replies: 1
Views: 98

Re: New motor for the Red Rocket! Need some advice! Please help!

The R9771 number is for piston rings not a connecting rod. The CB699P is a Ford 240/300 bearing so the connecting rods are either a 240 or 300 or a custom rod made for the 300 crank. You seemed to mention pushrods with guide plates. The pre 1985 heads have built in guide slots that would conflict wi...
by pmuller9
Fri Sep 21, 2018 12:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 274
Views: 16661

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Bruce and I spent a lot of time discussing the start of this thread and where the boundaries were going to be. The thread content was intended to allow everyone to be able to follow the development of all three heads and also be able to have some input on design features. It was necessary to let eve...
by pmuller9
Thu Sep 20, 2018 10:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Replacement fuel injectors
Replies: 9
Views: 212

Re: Replacement fuel injectors

Don't delete the EGR.
It allows you to run a lean mixture for fuel mileage while keeping the cylinder temps low.
by pmuller9
Thu Sep 20, 2018 10:23 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo Header Design
Replies: 13
Views: 166

Re: Turbo Header Design

Keep cylinders 1,2,3 separate from 4,5,6, just like the stock EFI exhaust manifolds.
Feed one set of cylinders to one side of the twin scroll turbine housing and the other set to the other side of the turbine housing.

Since you are going for mid range power, a 1.5" runner will be fine.
by pmuller9
Wed Sep 19, 2018 3:36 pm
Forum: Aluminum Cylinder Head
Topic: CI/VI head setup questions
Replies: 28
Views: 834

Re: CI/VI head setup questions

I use Dropbox.
by pmuller9
Tue Sep 18, 2018 12:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

Ross makes a good piston. Most of the piston manufacturers will be close to the same in piston price. Last time I checked it was around $900 for six pistons with pins and pin fit (with no options) for a 2618 alloy piston. Here is some explanation of the crank journal radius or fillet. https://help.s...
by pmuller9
Tue Sep 18, 2018 1:54 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 219
Views: 21307

Re: 300 I6 EFI performance upgrades

The 68405-12 double valve springs will require the locators on the head to machined down to .750" diameter. The 382 lb/in spring rate is more than what you need and adds unnecessary stress to the valve train. The problem Crower has is that they don't have another spring either single or double ...
by pmuller9
Mon Sep 17, 2018 11:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

The Molnar rods use the SBC rod bearings for a 2.100" crank journal. The 300 six crank journal will need to be turned down from 2.123" to 2.100" which gives the machinist the opportunity to make a small radius at the journal ends to relieve the stress risers FTF was referring to. The...
by pmuller9
Mon Sep 17, 2018 10:51 pm
Forum: Aluminum Cylinder Head
Topic: CI/VI head setup questions
Replies: 28
Views: 834

Re: CI/VI head setup questions

Would you mind posting a picture of the rods or a single rod?
by pmuller9
Mon Sep 17, 2018 10:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

The Molnar rods use the SBC rod bearings for a 2.100" crank journal. The 300 six crank journal will need to be turned down from 2.123" to 2.100" which gives the machinist the opportunity to make a small radius at the journal ends to relieve the stress risers FTF was referring to. The ...
by pmuller9
Mon Sep 17, 2018 10:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 219
Views: 21307

Re: 300 I6 EFI performance upgrades

I'm hoping that since this head is for turbocharging you will be installing exhaust valves seats? Since the valves I have purchased are made for my head and I am not using the Chevy valves, can I just install them as-is? How do I check spring clearances to make sure everything is right? Once the val...
by pmuller9
Mon Sep 17, 2018 12:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

I doubt the 25psi claim until I see it proven. No MAP sensors I know of off hand limit at that pressure and FITech also claims a 2.5bar sensor, which isn't 25psi. It's either or, not both. 2.5bar is common and equal to 21psi. 25 psi is equal to 1.7xxx bar and 2.5 bar is equal to 36.2xxx psi Yes but...
by pmuller9
Sun Sep 16, 2018 2:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Please I need some pointers
Replies: 6
Views: 146

Re: Please I need some pointers

Do a compression test on each cylinder.
by pmuller9
Sun Sep 16, 2018 2:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 219
Views: 21307

Re: 300 I6 EFI performance upgrades

What's the purpose of that divot in the head's combustion chamber opposite the spark plug? Should it be filled in (with Ni rod?), then smoothed out & polished? J.R. SoCal Don't know but the best that can be done is just grind any raised area around the divot flat and leave it at that. If you tr...
by pmuller9
Fri Sep 14, 2018 9:01 pm
Forum: Aluminum Cylinder Head
Topic: CI/VI head setup questions
Replies: 28
Views: 834

Re: CI/VI head setup questions

update?
by pmuller9
Fri Sep 14, 2018 8:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: "Night shift" gets a new motor.
Replies: 11
Views: 740

Re: "Night shift" gets a new motor.

The last ported carb head I had flowed close to that.
Good to see progress.

Are the pistons and cam in yet?
by pmuller9
Fri Sep 14, 2018 12:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 219
Views: 21307

Re: 300 I6 EFI performance upgrades

On the last 300 carb chamber I brought the chamber walls around the spark plug out to the cylinder wall scribe line just to get that small edge out of the cylinder and I smooth the chamber surface.

Image
by pmuller9
Fri Sep 14, 2018 11:46 am
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

Tell Them Paul Muller sent you.
by pmuller9
Fri Sep 14, 2018 10:06 am
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

pmuller9 wrote:If they are back in stock use the Molnar CH6385NTB8-A "H" beam connecting rods.


I just called and they have one set remaining
by pmuller9
Thu Sep 13, 2018 9:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 4.9 I6 upgrades
Replies: 11
Views: 338

Re: 1988 4.9 I6 upgrades

Yes and you can do a better job than a shop that doesn't know the Ford EFI head.
Here is a very good example with some great pictures.

viewtopic.php?f=22&t=77808
by pmuller9
Thu Sep 13, 2018 9:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

If they are back in stock use the Molnar CH6385NTB8-A "H" beam connecting rods.
by pmuller9
Thu Sep 13, 2018 4:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

The Go EFI Power Adder 600HP is all you will need and all the engine will handle at this level. Whether or not a 300 six can handle 20 lbs of boost is a trick question. A stock head 300 six can get away with 20 lbs of boost for a short period of time because the head restriction is only allowing so ...
by pmuller9
Thu Sep 13, 2018 11:00 am
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 32
Views: 574

Re: FiTech (or other FI systems) used with boost.

Anyhow, i was planning on running dual 2bbl carbs. But now, i am thinking of going EFI using a system such as FiTech which handles up to 25 psi of boost. I am using an HX35 turbo and was originally going to use 10-15 psi. But the internal waste-gate goes to 21 psi. You don't want to be stuck with h...
by pmuller9
Wed Sep 12, 2018 10:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 92
Views: 4230

Re: 300 torque build 85 Bronco

I'm glad you didn't try to use the head as a template or fixture because the spacing would have been off.
The pushrods come up at an angle because the lifter spacing is greater than the valve spacing.
This makes the pushrod guide spacing about .035" more than the valve spacing

Looks Good!
by pmuller9
Tue Sep 11, 2018 11:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Piston skirts
Replies: 12
Views: 262

Re: 300 Piston skirts

Which pistons are you going to modify?
Will they be new pistons?
by pmuller9
Tue Sep 11, 2018 10:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: This might be a silly question....
Replies: 15
Views: 614

Re: This might be a silly question....

It should be OK. Do a quick check. The #1 cylinder exhaust valve should be almost closed as the intake valve just begins to open at TDC. What you are describing here is top dead center between the exhaust and intake strokes. If I drop my distributor in here, it will be 180 out. Both valves should b...
by pmuller9
Mon Sep 10, 2018 11:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: VINTAGE CHAMP CAR REPLICA BUILD
Replies: 45
Views: 2524

Re: VINTAGE CHAMP CAR REPLICA BUILD

I wish I had a more agressive hydraulic cam available. With non-adjustable rockers none of my solid or roller cams will work. What would you like for cam specs? Pick a couple long duration, low lift lobe profiles from here http://www.bulletcams.com/Masters/Hlobes.htm You will want either a CTA or C...
by pmuller9
Mon Sep 10, 2018 1:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 92
Views: 4230

Re: 300 torque build 85 Bronco

If there aren't any pictures it didn't really happen :lol:
by pmuller9
Sun Sep 09, 2018 8:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 4.9 I6 upgrades
Replies: 11
Views: 338

Re: 1988 4.9 I6 upgrades

The EFI engine works best with all systems in place including EGR. Gas mileage can suffer if the EGR is eliminated. You are looking for more horsepower. The limiting factor is the EFI system itself as it will only support moderate gains before the system is at it's limit. You can push the midrange b...
by pmuller9
Sun Sep 09, 2018 10:13 am
Forum: 240-300 "Big Block" Six Performance
Topic: Cam Selection for Weber DCOE carbs
Replies: 48
Views: 2640

Re: Cam Selection for Weber DCOE carbs

The Weber 45 DCOE 36mm choke would be a good fit for a bone stock 300 where the peak power is close to 3500 rpm.

xctasy wrote:I get 40 mm for power at 4550 rpm, Thats about the biggest you can get in a DCOE45.
by pmuller9
Sun Sep 09, 2018 12:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Cam Selection for Weber DCOE carbs
Replies: 48
Views: 2640

Re: Cam Selection for Weber DCOE carbs

I understand that disrupting a single tuned pathway between the venturi and intake port with a plenum is in conflict with the Weber design and not ideal. So let's revisit a no plenum, IR approach and please keep it specific to this engine build. Please keep in mind that the OP stated that the intere...
by pmuller9
Fri Sep 07, 2018 3:24 pm
Forum: Aluminum Cylinder Head
Topic: CI/VI head setup questions
Replies: 28
Views: 834

Re: CI/VI head setup questions

Good thing you checked the actual spring pressure.
Did Comp give an explanation why the spring pressure is so far off?
by pmuller9
Fri Sep 07, 2018 3:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: This might be a silly question....
Replies: 15
Views: 614

Re: This might be a silly question....

It is a good question. The keyway in the crank snout lines up with #1 rod journal. The cam bore is 45* from straight up. The dot on the crank gear is also 45* from the keyway for the crank key. So if the 2 dots on the gear set are lined up which puts them 45* degrees from the straight up line from t...
by pmuller9
Fri Sep 07, 2018 12:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 torque build 85 Bronco
Replies: 92
Views: 4230

Re: 300 torque build 85 Bronco

BigBlue94 wrote:Just ordered the SI valves from the link I posted above. 4.810 length stainless 1.94 and 1.6 size.
About 180 shipped. Should be here in 4 or 5 biz day

Thanks for the availability information.
by pmuller9
Fri Sep 07, 2018 11:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: This might be a silly question....
Replies: 15
Views: 614

Re: This might be a silly question....

I appreciate everyone's support but the more important issue concerning Steve's response is how we treat each other. Anyone and everyone should feel safe to be able to post anything (as long as it is within the Forum guide lines) no matter if it is right or wrong without the fear of getting beat-up....
by pmuller9
Thu Sep 06, 2018 11:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI vs. Carb engine
Replies: 8
Views: 421

Re: EFI vs. Carb engine

Cam suggestions that will play nice with the EFI? The stock EFI system will not support much in the way of extra horsepower which peaks around 3500 rpm. But that does't mean you can't make a lot of extra torque between 1500 and 3000 rpm. Bear with me for a minute while I go through a planning sessi...
by pmuller9
Thu Sep 06, 2018 10:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: This might be a silly question....
Replies: 15
Views: 614

Re: This might be a silly question....

Silly me for trying to answer a silly question.
by pmuller9
Wed Sep 05, 2018 10:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam Selection for Weber DCOE carbs
Replies: 48
Views: 2640

Re: Cam Selection for Weber DCOE carbs

I was thinking about cutting the lower half of the EFI intake manifold short just before the bend and welding the 3 plenums to it. I vacuum canister might work if it had a small volume. A large volume would create a delay in response for the vacuum advance. It would be best if the 3 lines just went ...
by pmuller9
Wed Sep 05, 2018 6:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam Selection for Weber DCOE carbs
Replies: 48
Views: 2640

Re: Cam Selection for Weber DCOE carbs

Stay with the Weber DCOE plan. I agree that they are small for a 300 six if each barrel feeds a single cylinder. However you can cheat by having each weber mounted to an individual plenum that has two runners, each runner connected to one of two cylinders. This way each cylinder is being serviced by...
by pmuller9
Wed Sep 05, 2018 8:35 am
Forum: 144-250 "Small Block" Six Performance
Topic: Surging on deceleration/coasting
Replies: 12
Views: 246

Re: Surging on deceleration/coasting

First try running without the vacuum advance line connected (don't forget to plug the vacuum line) and see how it responds with just the mechanical advance in action.
by pmuller9
Tue Sep 04, 2018 9:52 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Surging on deceleration/coasting
Replies: 12
Views: 246

Re: Surging on deceleration/coasting

Sounds like it is related to engine torque twisting the engine and the throttle linkage.
by pmuller9
Tue Sep 04, 2018 5:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI vs. Carb engine
Replies: 8
Views: 421

Re: EFI vs. Carb engine

You can either use rocker arms with a higher ratio to increase valve lift or install a slightly larger cam.
by pmuller9
Tue Sep 04, 2018 8:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: This might be a silly question....
Replies: 15
Views: 614

Re: This might be a silly question....

It should be OK.
Do a quick check. The #1 cylinder exhaust valve should be almost closed as the intake valve just begins to open at TDC.
by pmuller9
Mon Sep 03, 2018 10:46 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Wastegate Location
Replies: 21
Views: 664

Re: Wastegate Location

Attach the wastegate to the bottom of the J-bend. Would there be any performance benefit mounting it on the side of the J-bend verses the bottom? One would think that the bottom could disrupt flow smooth flow to the turbine, I'm also thinking the bottom would disrupt smooth flow to the turbine. If ...

Go to advanced search