Inliners International Forums General Discussion Blown and Injected Custom made fuel injection intake

Yeehaw!

Das what i'm sayin buddy!!

Well now that is t not 120 degrees out side its time to get back at it!!

Just cleaned out the garage and got all of my intakes parts together gunna take them to my shop and start doing a little after work peace work time for parts on my truck;)

Also got the mega squirt done only took 9 hours including the fuse block and stimulator took 3.5 hours to get the DB9 to usb cable to bind what a pain in my well i'll let it be

Happy inlining !

Bringig thos one bak from the dead!

Hey all

Was curious at to what soze injector bungs to buy 14mm or 15mm?

I am not sure on what size body of injector. But be sure to get injectors that can supply enough fuel. My engine has 42LB x 6 of them.

Was looking at the bungs i guess i should look at i jectors and see what size they are for 42 pounds! Are yours bosh or any partiular brand?

Thanks tom!

Mine were for Ford Motorsports. Probably by Bosch.

Did you get them off summit or something?

I'll have to look them up and see if the mega squirt will accept them iirc it had some sensors it was specific about but i could be way wrong its been known to happen before

MegaSquirt will run just about any injector. Some peak and hold injectors will require a "peak and hold" box, and low resistance injectors may or may not require some jumper or resistors to ensure the injector driver doesn't short out, but that is dependent on which Megasquirt setup you have (MS3 Pro, MicroSquirt, MS3.0, MS2.2, etc).

Practically anything below 80lb/hr injectors are likely just plug and play with the MegaSquirt. I run cheap-o Accel injectors from Summit on my Skylark and Firebird. The Skylark has 44lb-hr injectors and the Firebird has left over 32 lb/hr injectors in it, which will probably need replacing when I put serious boost to it, but for now are way oversized for the application.

What about these ones silver buick?

Summit Racing Street & Strip® High-Flow Fuel Injectors SUM-240042-1

Crap link didn't work

That one looks mint. Standard high-impedance. Just install and go.

If this is your first EFI rodeo, remember the MegaSquirt triggers the injector by supplying a ground signal, so one pin gets a full 12v, and the other pin goes to the MegaSquirt. They aren't sensitive to which pin gets the 12v or the ground.

Awesome thanks for the help again hopefully here in a week or so i'll have em in. Then to figure out the fuel rail hmmm

How are tyou guys drilling the fuel rails out jist regulardrill bits some sort of srep bit or do you have the actuall bit for fuel injectors?


Happy inlining

Throttle body choices

Okay so here we go I am just about done building my intake I know it's been forever but you know how life gets I the way

So at ross machine racing the D shaped plenum I
Extrusion I bought they sell a throttle body for it but it's 90 mm

Its a ford 5.0 l throttle body that bolts up to it that they make in house now I am only going to have 2 1/2 intake piping from the turbo through the Internet cooler and to the intake that's a 1 inch jump from 2.5" to 90mm

Will it loose noticeable velocity at that throttle body into the intake I found d a calculator and it was saying 65mm what it's just a smidgen over 2.5"

If I do use a 65 mm throttle body it will still be going into the same plenum that will fit the 90 mm

So what do you guys think about that I know bigger is not always better it's a multi port design devided I that are ports ms2 fuel control
Plenum is tapered towards the ear to keep velocity up as it travels down the Plenum maybe 6 lbs of boost

If you go that much bigger on throttle body size slow down the gas pedal ratio or you will likely encounter an "all off / all on" effect under your loud foot.

I just bought an appropriate size drill bit (17/32"?) and used my drill press. The idea is not to drill them all the way through so you can start with say a 1/2" bit and drill into the fuel passage, then use the drill press to stop a bit short of the fuel passage with the larger drill bit so the o-ring has something to stop against. Then I simply used a dremel to bevel/round the edge, then followed it up with a light sandpaper and scotchbrite pad to keep from cutting the O-rings when installing.




My opinion on the throttle blade is bigger is okay, so long as your throttle linkage geometry doesn't cause that ON/OFF problem with the gas pedal. I wouldn't worry so much about air slowing down from the charge pipe to the plenum so long as the runners are of sufficient volume and length for the cylinder.

When you use (3) 40MM Weber sidedraft carbs on a Chevy inline, they have a total of 240MM of throttle bores, so I don't think having (1) 90MM throttle bore would be too large.

A friend of mine has 4600 cfm worth of throttle body on his N/A small block chevy, lol. Runs 9.60's in the quarter and drives fine down the street. As I said, I wouldn't worry too much about plenum speed as long as you have good runner volume.

Nice fuel Raul Randy I like it!

Thanks i'llike Ullman he trigger on the end pieces for the throttle body then

What's a good volume for the runners the Plenum is big enough then it will be to a 2" rouND bend then grafted into a 2 1/8 by 1 1/4 oval that will be devided to split the siamese heads that have deviders

So it will be 1 1/4 tall by 1 and 1/16 before heading into the port

And Randy what do you mean by on off problem with the gas pedal like sticking?

Sorry ftf I didn't see your post you stated the on off as wellike I am just using a stock pedal 1972 gmc truck to a cable driven butterfly with tps

Randy that will work with the ms2 correct as long as it has a test sensor?

What do you guys think and or have done about holding in the intake deviders? I was thinking maybe I could Weld a small plate to the devider drill and tap through the mouth of the intake and lock tight them in I am worried about them falling over or losing nuts or and seperate pieces I have see photo attached for drilling location

Both sides of the flat spot into a small plate on both sides of the devider no twisting or falling no bolts or nuts to be eaten

Throttle body and adapter for the Plenum came in today time to get that welded in and the injector bungs

every thing is at the welders hes been off hunting but o can't wait too see it getting almost impatient but i have to be hope to hear from you guys !i can't see the forum from my phone for like a month now so only when i get on to the computer can i chit chat

happy in-lining

Just going to leave this here

Looks good!

Tapped the rear Plenum last night for vacuum ports just need to tap the end of the fuel rails for an fittings

Looks good Josh, I think I mentioned to you a few months ago that I figured about the time you got this far with yours mine would start showing up.

I know I was so excited to see yours I have another 292 I need built for a long term reliability

I had two welders try to build this they got no were so I just did it my damn self self taught my self to tig Weld and all sorts of other things

Good job! Looks great.

Thanks I am 1 devider away from putting it on permanently and a bit of wiring a battery and should have a running truck again

How soon till yours are for sale?

That's beautiful Scott!

Thanks Randal!

Josh, not too far out on having them ready. I'll leave the TB end as a custom operation to accomodate the actual TB the user has in mind, since most all habe different bolt patterns.

Perfect, a blank flange and a ready to "port to size" hole.

I had you in mind when I did that.

You are a saint

I like them I am excited and definitely buying one for my next project hehe