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Search found 42 matches

by jgregg13
Wed Feb 05, 2020 5:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intake manifolds
Replies: 16
Views: 725

Re: Intake manifolds

Mine would be the later one, '94 - 95. At the moment it's on over a PBF valve cover and there is 11/16" clearance. So even if you had a 5/8" valve cover spacer with one extra gasket, it should clear. The lowest part of the plenum is the front corner of the throttle body flange, and it coul...
by jgregg13
Sun Jan 19, 2020 5:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Picked up a Turbo
Replies: 58
Views: 1995

Re: Picked up a Turbo

But if you decide blow-thru you'll need a carb air box for that carb My recipe for the carb pressure box for what it's worth. Take an old Presto pressure cooker from the second hand store. flip it over, cut out the lid and weld in a carb spacer plate and the air inlet neck to the bowl. Run your thr...
by jgregg13
Fri Dec 27, 2019 2:44 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 25
Views: 2696

Re: Hedman vs EFI headers

I've seen mention of doing that somewhere else as well. I'm interested in seeing any more pictures of how the rear manifold fits and clearances if you have any. :) To mount the front manifold to the rear position I first cut off the bolt lug at the very front of the manifold, then milled a couple o...
by jgregg13
Sun Dec 22, 2019 3:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turbo 240 bit the dust. Hole in the block.
Replies: 43
Views: 1710

Re: Turbo 240 bit the dust. Hole in the block.

I agree that it looks like a beam failure. There was likely a crack that was initiated earlier under more severe loading that would propagate until it would fail under a lighter load. If the fracture face is clear enough from subsequent damage you might be able to see the crack propagation. I would ...
by jgregg13
Wed Dec 11, 2019 7:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Best Spark Plugs for Turbo Application
Replies: 10
Views: 1002

Re: Best Spark Plugs for Turbo Application

Thanks Rick, That's the info I was looking for. For some reason my search didn't come up with that source for adapters. :)
by jgregg13
Wed Dec 11, 2019 2:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Best Spark Plugs for Turbo Application
Replies: 10
Views: 1002

Re: Best Spark Plugs for Turbo Application

There you go. Buy the adapters and 6 iridium or platinum plugs spec'd for a 1988 Thunderbird Turbo Coupe. In searching for adapters, the common ones I find appear to be for flat seat heads as opposed to 18mm tapered seat. Does anyone have a quick answer for an 18mm tapered seat to a 14mm x 3/4"...
by jgregg13
Wed Dec 11, 2019 1:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: Best Spark Plugs for Turbo Application
Replies: 10
Views: 1002

Re: Best Spark Plugs for Turbo Application

Cool, I will see if the parts store has some BF-22s and give them to my machinist to cc the head. Thanks! Did you manage to find the BF-22s or did you go to something else? Looking on line I'm not having much luck finding BF-22s so I'm considering NGK in a 7 or 8 heat range. The stock heat range fo...
by jgregg13
Sun Nov 24, 2019 3:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Kieth Black vs Silv-O-Lite pistons
Replies: 16
Views: 1315

Re: Kieth Black vs Silv-O-Lite pistons

Can you take the time to CC the dish volumes to see how much each piston varies? Measure the actual distance from the pin bore to the top of the piston at both sides of the piston to see if the pin bore is parallel to the piston top? Also weight each piston to see how much the weight differs. Thank...
by jgregg13
Tue Nov 19, 2019 2:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: ok, a flyer on a totally new idea; belt driven cam.
Replies: 4
Views: 439

Re: ok, a flyer on a totally new idea; belt driven cam.

While you're at it, best to turn your seat around so you can see where you're going in high gear. :bang:
by jgregg13
Tue Nov 19, 2019 2:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: EFI Smog Injection Plug Size
Replies: 41
Views: 8063

Re: EFI Smog Injection Plug Size

I made plugs to fit the seat at the bottom with a nipple that goes through the hole then I set them in place with a 14 x 1.5 set screw and ported the hump out so there is no hole or step in the port I've basically done the same thing but I was unable to find the right size set screws around here so...
by jgregg13
Fri Nov 08, 2019 1:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Kieth Black vs Silv-O-Lite pistons
Replies: 16
Views: 1315

Re: Kieth Black vs Silv-O-Lite pistons

Just picked up a set of "Speed-Pro" (Sealed Power, Federal Mogul, made in India) pistons that are advertised as hypereutectic. They were only $78 for the set and have the "D" shaped dish. So I'll let all know if there are any issues.
by jgregg13
Fri Nov 08, 2019 12:27 am
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 4.9 ranger
Replies: 20
Views: 1146

Re: Turbo 4.9 ranger

Sounds like a great project. I'll be following.
by jgregg13
Sun Oct 20, 2019 2:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: torque plates
Replies: 13
Views: 1384

Re: torque plates

Just a thought for the econo engine builder like me. Is there any merit to just making a torque plate for one cylinder and moving it from hole to hole. You can machine a donut in any lathe quite easily for this. Might be better than nothing as a compromise. As it seems that most worn cylinders do sh...
by jgregg13
Wed Oct 09, 2019 3:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Aussie speed intake manifold and valve cover.
Replies: 13
Views: 1630

Re: Aussie speed intake manifold and valve cover.

Here are photos of the stock fuel rail.

Image
Image
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by jgregg13
Tue Oct 08, 2019 2:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Aussie speed intake manifold and valve cover.
Replies: 13
Views: 1630

Re: Aussie speed intake manifold and valve cover.

I don't have one, so can't report. But I'm going to Adelaide in March to visit my daughter, so I'll go talk to them about the intake. They say it will accommodate injectors which is what I would want, but the cast injector bosses appear to be at a different angle from the stock EFI manifold, so I'm ...
by jgregg13
Fri Oct 04, 2019 1:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Lower EFI intake runner for performance?
Replies: 2
Views: 812

Re: Lower EFI intake runner for performance?

guhfluh wrote:Anyone know the runner length and diameters of the EFI lower?


The length is 9.88" +/- 0.10" and the I.D. at entry is 1.625".
I have not measured the port dimensions.
by jgregg13
Sun Sep 29, 2019 2:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI Manifolds
Replies: 10
Views: 1357

Re: EFI Manifolds

Don't be afraid of Pick-n-Pull. I've done it to get an extra front manifold, and I think it took me about 20 minutes. I'm in my 70's so don't work real fast. You'll need a set of metric sockets 14mm to 21mm. the 21mm needs to be a deep socket to get the frontmost stud behind the alternator bracket. ...
by jgregg13
Sat Sep 28, 2019 12:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: EFI Manifolds
Replies: 10
Views: 1357

Re: EFI Manifolds

Anyone ever ordered the aftermarket efi manifolds such as the ones off eBay for $200? I have been looking for a used set but haven’t come across one yet. Have you tried the Pick-n-Pull yards in Kansas City. Checking on line there appears to be 6 possible trucks there with 4.9L engines. Possibly at ...
by jgregg13
Sun Sep 15, 2019 12:23 am
Forum: 240-300 "Big Block" Six Performance
Topic: 1996 4.9 with no AC?
Replies: 3
Views: 432

Re: 1996 4.9 with no AC?

Mine is a '94 that came without AC. I've since added an AC compressor and removed the AIR pump. The old belt was too long for this arrangement. I cut it and used vice grips (first photo) to clamp the overlapped belt and mark it to get the correct length. https://i.imgur.com/L9hBUEi.jpg The result is...
by jgregg13
Wed Aug 14, 2019 8:09 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 4.9 f150
Replies: 25
Views: 3339

Re: Turbo 4.9 f150

Just made these plates up to mount twin T25 (K14 actually) to the Ford manifolds. They are 5/8 plate, tapered, drilled and counterbored for socket head cap screws. I drilled out the threaded stud holes in the manifolds to 15/32" and used 7/16 cap screws and nuts. I shortened the heads of the 7/...
by jgregg13
Sat Aug 10, 2019 3:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: two front efi exhaust
Replies: 5
Views: 814

Re: two front efi exhaust

Not done or run yet, but that's the plan here. As FTF says I had to cut one mount ear off and will have to make a custom clamping bar. I'm just now working on the turbo adapter plates, so will post more details as I complete the project. https://i.imgur.com/mWgS737.jpg https://i.imgur.com/NrbtKF6.jpg
by jgregg13
Mon Jul 22, 2019 2:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 103
Views: 9822

Re: Turboing a stock 300, how to make it last?

Even though the early EFI engines had regular cast pistons we generally see broken pistons in the earlier engines. So does this mean that later EFI engines came from Ford with Hypereutectic pistons? My engine in question is out of a '94 pickup, but is a replacement engine so I don't know what year ...
by jgregg13
Mon Jul 08, 2019 4:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Exhausting advice please.
Replies: 10
Views: 1191

Re: Exhausting advice please.

Restrictions after the turbo are never good, so go as large as you can. Especially with a couple of 90’s in each pipe. Come out of the turbo and then step up. I’d like at least 2.4” ID per pipe/turbo While I agree that the less restriction the better for maximum performance, I have looked at a coup...
by jgregg13
Thu Jul 04, 2019 4:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1523

Re: Push rod separated from rocker arm

Before pulling the head off, I'd be looking more to the lifter being collapsed or damage to the rocker arm or the rocker saddle being worn badly as it sounds like your valves are sealing. With the intake not opening, the exhaust won't let much air in to give much of a compression test reading. I ass...
by jgregg13
Thu Jul 04, 2019 4:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Exhausting advice please.
Replies: 10
Views: 1191

Re: Exhausting advice please.

Okay then! Once I get 'er done I'll do some decibel checks and post a recording so we'll see what sort of tune it's humming. :)
by jgregg13
Thu Jul 04, 2019 1:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Exhausting advice please.
Replies: 10
Views: 1191

Re: Exhausting advice please.

if u will rev her to stratosphere u might want to reconsider .... and why no X pipe or H pipe connector? Thanks gentlemen for the guidance. I don't want to rev it over 5G, It's basically to be a daily driver lead sled that can get out of its own way. No X pipe just because I want it to sound like m...
by jgregg13
Wed Jul 03, 2019 1:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Exhausting advice please.
Replies: 10
Views: 1191

Exhausting advice please.

My 4.9 EFI swap into a '48 Chevy is at the point where I will be building the exhaust system. I am using two front EFI manifolds to facilitate mounting two turbos directly to the manifolds with adapter plates. The turbo setup will be mild, 8 to 10 psi max boost. The exhaust system from the turbos ba...
by jgregg13
Wed Jul 03, 2019 12:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1523

Re: Push rod separated from rocker arm

Looking at the picture, the valve stem end of the rocker arm is high and it is not holding the exhaust valve open. The problem may be that the valve is stuck open and is what caused the pushrod to push out from the rocker. I agree that the valve is likely stuck open. But it's the intake valve. It c...
by jgregg13
Thu Jun 27, 2019 2:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: serpentine belt conversion
Replies: 56
Views: 9990

Re: serpentine belt conversion

Did you redrill the mounting holes or were they already cast there? I'm also curious if I could use the older v-belt style alternator bracket instead and how the pulleys would line up, while just using the PS and AC bracket and associated other serp belt parts. I didn't have to drill new holes in t...
by jgregg13
Wed Jun 26, 2019 3:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: serpentine belt conversion
Replies: 56
Views: 9990

Re: serpentine belt conversion

So after showing my belt routing earlier here without the AIR pump and the interference with the lower alternator bolt I went to pick-a-part to get a 3G alternator to replace the 2G with its bad reputation. I picked an alternator from a '92 Mercury Sable 3.0L. It had a 5 groove pulley so I used the ...
by jgregg13
Sat Jun 15, 2019 3:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: serpentine belt conversion
Replies: 56
Views: 9990

Re: serpentine belt conversion

Here's my belt routing without the A.I.R. pump and with an A/C compressor added. To establish the belt length I used an old broken belt, clamped it together with vice grips and marked first, then take off stretch out and measure the length. https://i.imgur.com/L9hBUEi.jpg https://i.imgur.com/QpLrtwF...
by jgregg13
Thu Jun 13, 2019 6:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: serpentine belt conversion
Replies: 56
Views: 9990

Re: serpentine belt conversion

I was going to convert to serpentine, but I was concerned about stress to the aluminum bracket because of the missing mounting boss on the head. Yes, this could be an issue all right. There is a boss lower and forward a bit that probably could be drilled and tapped to bolt an adapter plate to and y...
by jgregg13
Thu May 23, 2019 6:38 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 4.9 f150
Replies: 25
Views: 3339

Re: Turbo 4.9 f150

Here are some pics before I took it apart to freshen it up https://fordsix.com/download/file.php?id=3561&t=1 I like the way you've modified the intake plenum and adapted the single throat throttle body. I picked up a spare plenum manifold today and a throttle body and would like to do the same ...
by jgregg13
Fri Apr 19, 2019 1:50 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 4.9 f150
Replies: 25
Views: 3339

Re: Turbo 4.9 f150

The factory ecu is maxed out due to being tuned for such a small injector. I have already tried to work around it. You can get a used megasquirt cheap if you can't get a new one. I'm happy to help with any needs you have. Just pm me. I will send you a tune and all you have to do is change the injec...
by jgregg13
Wed Apr 17, 2019 3:21 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 4.9 f150
Replies: 25
Views: 3339

Re: Turbo 4.9 f150

Thanks for the reply. Are you using the M5OD-R2 transmission or something else? As I will be using the M5 that came with the truck. Good comment on the clutch tho. Hopefully with a milder engine I can get away with a lighter clutch. I'm also planning to use Megasquirt and have a couple of friends he...
by jgregg13
Tue Apr 16, 2019 11:39 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 4.9 f150
Replies: 25
Views: 3339

Re: Turbo 4.9 f150

That's a good looking job. How is it as a daily driver?
I'm contemplating a milder version with twin K14 turbos. Expecting rev limit around 4500.
by jgregg13
Thu Apr 11, 2019 3:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 25
Views: 2696

Re: Hedman vs EFI headers

The actual compressor inducer blade diameter is 38mm as the inlet tapers down. Correct, although I measured the ID of the compressor inlet at the wheel and I get closer to 36mm. I don't know if all K14s have the same inducer size. From a list of K14 car applications it looks like the Audi 2.5L TDI ...
by jgregg13
Tue Apr 09, 2019 3:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 25
Views: 2696

Re: Hedman vs EFI headers

These are KKK model K14 turbos with a 50mm inlet ID at the compressor. They came off Iveco 2.3L diesel engines. The K14 series is used on a variety of engines from about 2L up to 2.8L that produce about 150 HP +/- . I hope to get around 250 to 300 HP at 4500 rpm max with the twin setup. But not ther...
by jgregg13
Tue Apr 09, 2019 1:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 25
Views: 2696

Re: Hedman vs EFI headers

Just a note that if it helps with your plumbing for the Turbo mount, you can use a front EFI manifold on the rear cylinders with a little modification. This raises the rear outlet so the turbo connections might be shorter.

Image
by jgregg13
Wed Jan 30, 2019 3:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hypothetical power output question?
Replies: 9
Views: 1303

Re: Hypothetical power output question?

I hope my babble didn't bore you to much. Absolutely not. I appreciate stories of how the auto industry developed and recognizing those people that really imagined and created the advancements. Many times the credit for brilliant ideas goes to the manager and may not mention the one who actually co...
by jgregg13
Wed Dec 19, 2018 5:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 cooling problems
Replies: 3
Views: 638

Re: 300 cooling problems

I can't say why warm-up is slow, but JB Weld has a radiator repair product that will probably fix the leak at the filler neck. I used the plastic epoxy to fix a crack in my rad tank with good results. The rad repair kit includes some fibreglass cloth to reinforce the the joint for a longer lasting f...
by jgregg13
Wed Dec 12, 2018 3:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 in a street rod?
Replies: 17
Views: 2159

Re: 300 in a street rod?

I'm in the process of putting one in a '48 Chev. The engine is a '94 EFI version. Although the six is narrow, and thus exhaust clearance is good the accessory drive on the front is fairly wide and I had to tuck in the left side a bit by milling some off the mount bracket. To avoid going deeper into ...