Edelbrock Pro-Flo EFI Intake and Dry Shot

[Jeb]

Hello. I currently have an assembled:

MarkIV BBC 496 4-bolt
AFR315 heads fully CNC'ed
10.4 compression 92 octane pump gas compliant, .040 quench
Cometic gasket
CompCam street/strip hydraulic roller XR288
Scat rotating assembly kit with 4340 standard weight forged steel crankshaft, 4340 forged steel H-beam connecting rods, balanced internally with the JE pistons

Matt - Sorry, but I did not get to your Hellfire rings or extra clearance around the piston pin thread till after the block got assembled... however it does have ring gap for nitrous

I'm considering purchasing an Edelbrock EFI intake, Edel fuel rail, Edel elbow (space permitting), and Edel universal throttle body similar to P/N 35530

http://www.edelbrock.com/automotive_new/mc/efi/pf_chevy.shtml (http://www.edelbrock.com/automotive_new/mc/efi/pf_chevy.shtml)

and integrating into a Megasquirt cpu.

I'm guessing a 100 shot on some weekends at a track would not shorten the life span on the engine to much, but am curious what your thoughts are, and at what xxx hp shot would be causing some risk.... in general assuming dyno tuned and attention to plug appearance/knock sensor implementation.

Also, I think I am running out of real estate to plumb in direct port dry n20 at an optimal angle into the ports. Does someone have a pictures, ideas, services, etc (Robert?). The attached image is a non-efi manifold modified... please tell me there is a better option. Thanks. By the way, nice N2O forum!

[Robert56]

Hell a 100 shot is a baby shot for your BBC. that motor could easily take a 200 shot with the correct tune, no doubt about it. That intake of yours is nice and I run a similar set-up on my LSx, below (DP Dry, and two more dry stages on the plate all EFI controlled by the stock PCM).

IMO, EFI is really the way to go, however the one you linked may not be the best option. I only say that due to it's limit in HP, seems 625hp is eay to get to these days with the BBC, but it has been years since I was into the BBC. Edelbrock has some other options I would look into, but that is just me, Matt may have a different take.

I did a .028 top gap and a .022 2nd gap on my 408 for a 300shot. Now with that said, I have sprayed 250 shots with great success with stock ring gaps. At your level sought, at least at this time, lol, I would not worry too much about the ring gaps being to tight?
Robert

http://www.fquick.com/images/vehicles/full/2063276430.jpg

[hammered54]

you should be alright with the ring's a those level's with the larger gap.
not all that up on the efi stuff at this time (but I'm gettig there).
as far as max hp with the spray 250 should'nt be any problem what so ever.
when you want to get larger then I would consider a better piston (not brand but set up)
lower ring pack, the better ring's, pin's, clearance's ect.

yeah it seem's a little tight there with that manifold but after you've got it on the motor you may see more option's for the plumbing.

good job, Matt.

[Jeb]

Thanks!!! When I figure out my hood clearance etc, more than likely I'll be throwing some money your way for some services. More specifically.... I'm planning on purchasing the following unless some says it's overkill.

Super Victor BBC EFI 29275
http://www.edelbrock.com/automotive_new ... hevy.shtml (http://www.edelbrock.com/automotive_new/mc/efi/efi_chevy.shtml)

Universal throttle body 38793 1600cfm or 38883 2000cfm
http://www.edelbrock.com/automotive_new ... rsal.shtml (http://www.edelbrock.com/automotive_new ... rsal.shtml)


On a side note, are you driving some type of air vacuum for your engine block? Your picture has a line to your valve cover and a secondary pully on your serpentine. Can you provide some details and where to purchase that?

Or... is it there to help with the serpentine tension :)

[Jeb]

I'm moving forward..... which is awsome. Thanks Matt!!!

[Robert56]

Thanks!!! When I figure out my hood clearance etc, more than likely I'll be throwing some money your way for some services. More specifically.... I'm planning on purchasing the following unless some says it's overkill.

Super Victor BBC EFI 29275
http://www.edelbrock.com/automotive_new ... hevy.shtml (http://www.edelbrock.com/automotive_new/mc/efi/efi_chevy.shtml)

Universal throttle body 38793 1600cfm or 38883 2000cfm
http://www.edelbrock.com/automotive_new ... rsal.shtml (http://www.edelbrock.com/automotive_new ... rsal.shtml)


On a side note, are you driving some type of air vacuum for your engine block? Your picture has a line to your valve cover and a secondary pully on your serpentine. Can you provide some details and where to purchase that?

Or... is it there to help with the serpentine tension :)
I too have hood clearance issues, lol. Click the link to my site and there is now a section on the vacuum pump and we have them to fit anything and only have the Lsx version posted. It is an idler gear on my existing hardware with the serpitine going to the pump itself. The line pulls Vacuum at the valve cover (amount adjustable) and it goes thru pump to a puke can and breather.

That Pro Flo XT tunnel ram style intake and 90mm TB is what I would like to go to on my motor, of course with the DP dry. The current 90mm LS2 style TB I have would work for me, it is fly by wire though.
Robert

[Jeb]

Can someone recommend an injector brand for my intake? Originally I thought 40 lbs/hr no nitrous, but with 200 shot I'm guestimating 50lbs/hr. I believe the Dynomation software currently has a bug regarding lbs/hr when using nitrous, but time will fix that. The MegaSquirt III forum is recommending high impedance (11-18)...... if available. All I've seen is more holes, which supposedly translates to better atomization....

Robert..... fyi, your pictures of your intake and what you were trying, initially pulled me into this forum. Someday I'll post my recommendations for the home page... which has its shortcommings. It doesn't do much for the guy that cruzes the internet like he flips through channels on TV.

[Jeb]

After some futher research, those NOS nozzles squirt at a 90 degree angle.... no more real estate problem. I'm still looking for input on the best fuel injectors. Thanks.

http://www.holley.com/13503NOS.asp (http://www.holley.com/13503NOS.asp)

[Robert56]

Can someone recommend an injector brand for my intake? Originally I thought 40 lbs/hr no nitrous, but with 200 shot I'm guestimating 50lbs/hr. I believe the Dynomation software currently has a bug regarding lbs/hr when using nitrous, but time will fix that. The MegaSquirt III forum is recommending high impedance (11-18)...... if available. All I've seen is more holes, which supposedly translates to better atomization....

Robert..... fyi, your pictures of your intake and what you were trying, initially pulled me into this forum. Someday I'll post my recommendations for the home page... which has its shortcommings. It doesn't do much for the guy that cruzes the internet like he flips through channels on TV.
Man I am all ears? I am always open to corrective critiquing. If something can be changed to help out, well better for all. I do it all myself with no training at all in any regard to the web, lol. Mostly it's just a collection of info for the LSx guys...

Did you see the section where it shows the bungs welded in? they are aimed at the back side of the intake valves. HSW did the bungs and flowed it for me.
Robert

[Jeb]

Robert - I believe I did see that on your web site, at some level. That is why I panicked when I saw the N2O nozzles coming in at 90 degrees on that super victor manifold....

btw, you have an excellent web site that is very imformative.

[Robert56]

Did you get injectors? I just upsized my 42lb Ford SVO injectors to Motron 60lb'ers. I get a really great price on the 60's.
Robert

[Jeb]

I'll keep that in mind. Currently I am mocking up items to order the axle at $4k, then the transmission..... another $4k. It may be early spring before I start on the engine again.

Oh, since I have your attention.... and maybe others, I am looking to dyno the engine from someone with significant experience including Megasquirt and N2O. I'm located in SD, but am willing to travel to get it dialed in. Can you or someone else provide recommendations. Thanks!

[Jeb]

I have asked HSW to spec out some components given this configuration. Therefore, please allow HSW "informational" post(s) to stay. Thanks.

[Robert56]

No problem, HSW can come and go as needed and they have no restrictions that I amaware of. As far as SD, don't know anyone there? anyone else? may have to travel for sure. there is one guy in our racing crowd from tha area of the country, now if I can just remember his screen name, lol...
Robert