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Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#1
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Any room for EFI bungs on BDS intake?
I think Steve Barcak was able to squeeze port injectors into his BDS intake years ago, any way at all to do it with EFI? I will have a little more room since the blower is only 7" wide as opposed to the footprint of a normal roots blower of 12.25"
Whipple 245AX
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#2
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Lots of luck, I was trying to figure out how to squeeze in injectors for a mechanical fuel injection!
GTO George |
#3
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Injector plate
This do you any good?
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT |
#4
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I think he's looking for something that attaches to the intake for individual cylinder tuning......like me.
GTO George |
#5
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Thanks Erik, Agreed it would need to go into the runners
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#6
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I thought you wanted something into the intake port.
GTO George |
#7
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The whipple will be here tomorrow, but reviewing the footprint of the 245 4.0l blower I bought and the footprint of a roots blower it appears I will have around 2.5" on each side of excess room. I have a few ideas that might work
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#8
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I don't know about the BDS manifold, but on my hemi V8 I managed to squeeze port nozzles into the top corners of the fabricated blower manifold.
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
#9
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You don't have to weld in bungs, there are efi injectors available that thread into a tapped hole -Atomiser does them- they also have a threaded top so that you can run individual lines to them instead of using fuel rails.
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#10
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Really?? Have a link?
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#11
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79 Trans Am WS6 71 Formula 72 Formula 71 Firebird 69 Firebird |
#12
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Yes that's them, Turbo2 on YB is a dealer for them. Much safer than a fuel rail and easier to diy fit to any manifold. Shame their so pricey.
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#13
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Just a wee bit
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#14
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I've done it with mechanical injection. With a BDS and a 14-71. One injector in each intake runner, plus the 8 up in the hat. I never ran it of course, but that has little to do with whether or not you've got the room to fit the nozzle bodies. It just takes some massaging. I'll see if I can find some close up pics in the next few days.
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Just a blind squirrel looking for a nut. |
#15
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Thanks Brian that would be helpful
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#16
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I had looked into this to run with a turbo set up and planned to use a Holley High Ram top and a single bore throttle body. I also planned to run a 4" inner cooler made to mount below the Holley high ram lid. This would have made room to mount injector bosses since the Holley high ram lid is not as wide as the BDS blower. All I would have had to do is make a base plate and weld that to the BDS lower intake manifold and remove unneeded material and add the injector bosses.
With that said, one issue that needed to be address is that the BDS intake does not have dividers between each paired intake port... it just runs one large runner to the head. So aside from crap air flow into the cylinder, running a single injector per cylinder could potentially bleed over to the opposing cylinder making tuning difficult to nail down. I planned to install dividers to increase air flow velocity into the ports and shroud the injectors and keep them separated from the paired cylinder... so with minor work... yes. SPEED SAFE, NICK
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"The grass is not greener on the other side, its just fertilized with different $h!t" |
#17
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That's good info thank you. I'm rethinking the whole BDS intake. I'm thinking of building another one out of a gutsram like I did on the drag car. The Whipple is not very tall and looks like it will all still fit under the hood.
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1967 GTO 416 5-spd streetcar 11's on HP low 10's 150 shot 1965 GTO 10-71 Littlefield high-helix retro/Bird (untuned) 8.44 @159 3500+lbs 10.5W's SOLD! 1964 421 GP-Sold 6.0 cert. Fiat bodied altered blown alcohol Pontiac IAII-Sold |
#18
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A lot of blower manifolds have a siamesed intake runner - (no port wall dividers), it allows the head port to pull from a much bigger area and the airflow stream can be a straighter shot. I used a similar process on my previous turbo combo, I modified an Offy dual quad manifold and then cut out the port dividers, and then also cut out the port dividers in the cylinder heads - the airflow had a MUCH straighter shot at the valve. Cylinder to cylinder flow variations seemed to be minimal based on plug readings and driveability was pretty good considering the huge manifold plenum volume and dual 600 double pumpers. It is something I will be playing with again once I have the Holley sequential EFI system set up and baselined, as I believe there are power gains to be made here. I only tested this to just under a 1000 hp (at 17-18psi on factory 96 heads)
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#19
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Quote:
SPEED SAFE, NICK
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"The grass is not greener on the other side, its just fertilized with different $h!t" |
#20
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Yes, drag race use only, though driveability was fine.
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