Let's build a single plane efi intake
05-10-2014, 06:27 PM
#21
Melting Slicks
Thread Starter
Here's the base with a 1205 gasket on it,
not bad out of the box, no need to port match,
its a pretty good fit coz my Edelbrock heads are 1205, so I will leave it as is.
not bad out of the box, no need to port match,
its a pretty good fit coz my Edelbrock heads are 1205, so I will leave it as is.
05-13-2014, 04:47 PM
#22
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I am right there today. All on workbench.
1.Motown single plane EFI 5.625 max height
2.Edel universal 1000cfm TB(height unk will know tonight). Now i hear this TB linkage will hit rails. Say it in not true.
3.Edel rails on sale Jegs $90
4. 24 lbs injs Bosch 3
5. 2 in carb hat spectre
so 9.25 inch clearance at that TB area in pic?
My carb hat slopes downward but about 8 inches of it is flat. 4 inch each side of hat bolt.
1984
Close?
I will measure up TB and hat and report.
1.Motown single plane EFI 5.625 max height
2.Edel universal 1000cfm TB(height unk will know tonight). Now i hear this TB linkage will hit rails. Say it in not true.
3.Edel rails on sale Jegs $90
4. 24 lbs injs Bosch 3
5. 2 in carb hat spectre
so 9.25 inch clearance at that TB area in pic?
My carb hat slopes downward but about 8 inches of it is flat. 4 inch each side of hat bolt.
1984
Close?
I will measure up TB and hat and report.
05-13-2014, 05:10 PM
#23
Melting Slicks
RHS has a nice new efi single plane intake too, don't know the height tho.
05-13-2014, 05:21 PM
#25
I am right there today. All on workbench.
1.Motown single plane EFI 5.625 max height
2.Edel universal 1000cfm TB(height unk will know tonight). Now i hear this TB linkage will hit rails. Say it in not true.
3.Edel rails on sale Jegs $90
4. 24 lbs injs Bosch 3
5. 2 in carb hat spectre
so 9.25 inch clearance at that TB area in pic?
My carb hat slopes downward but about 8 inches of it is flat. 4 inch each side of hat bolt.
1984
Close?
I will measure up TB and hat and report.
1.Motown single plane EFI 5.625 max height
2.Edel universal 1000cfm TB(height unk will know tonight). Now i hear this TB linkage will hit rails. Say it in not true.
3.Edel rails on sale Jegs $90
4. 24 lbs injs Bosch 3
5. 2 in carb hat spectre
so 9.25 inch clearance at that TB area in pic?
My carb hat slopes downward but about 8 inches of it is flat. 4 inch each side of hat bolt.
1984
Close?
I will measure up TB and hat and report.
05-13-2014, 06:47 PM
#28
Melting Slicks
05-13-2014, 06:57 PM
#29
IMO
In TPI...probably none since the fuel spray can be at any portion of the 4 stroke cycle when the valve is closed and waiting for a while to open and inhale that charge.
because TPI is bank fired injection, all 4 inj fire together, so the intake valve is not necessarily open or ready to open...the fuel has to just "hang" there waiting for the intake to open and draw it in. That can lead to the atomized fuel becoming segregated from the air.
In the sequential multiport efi where the fuel spray is in time with each valve opening, there may be a slight bump in performance, provided the spray is atomized well and the runners have enough of an air-stream velocity to pull it all in.
05-14-2014, 06:17 AM
#30
Melting Slicks
Thread Starter
I am right there today. All on workbench.
1.Motown single plane EFI 5.625 max height
2.Edel universal 1000cfm TB(height unk will know tonight). Now i hear this TB linkage will hit rails. Say it in not true.
3.Edel rails on sale Jegs $90
4. 24 lbs injs Bosch 3
5. 2 in carb hat spectre
so 9.25 inch clearance at that TB area in pic?
My carb hat slopes downward but about 8 inches of it is flat. 4 inch each side of hat bolt.
1984
Close?
I will measure up TB and hat and report.
1.Motown single plane EFI 5.625 max height
2.Edel universal 1000cfm TB(height unk will know tonight). Now i hear this TB linkage will hit rails. Say it in not true.
3.Edel rails on sale Jegs $90
4. 24 lbs injs Bosch 3
5. 2 in carb hat spectre
so 9.25 inch clearance at that TB area in pic?
My carb hat slopes downward but about 8 inches of it is flat. 4 inch each side of hat bolt.
1984
Close?
I will measure up TB and hat and report.
yours will be different in that your using a 4 barrel TB on top ?
05-14-2014, 10:27 AM
#31
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Not sure if this is pertenant to the OP but may be helpfull to any 84-CF owners that are desiring to come into 20th Century. Ouch!!
Anyway I measured carefull the height of my current Holley projection mani with the GM 7.4L (1994-1995) with spacers to clear pod and then carb hat. Came to 10.95 inches and is clearly rubbing ever so slightly on the bottom of hood at 3 inches from center of TB at rear and 4 inches from TB at front on carb hat.
This is concurrent with measurements posted above being 11 inches.
Motown set up with Edel 4B TB(2.625) and hat is 10.67 so that allows about .28 inch more room!
I think I will have the Motown shaved at top base .50 inch to alllow more room. Need to verify the butterflies will not contact the runners.
Anyway I measured carefull the height of my current Holley projection mani with the GM 7.4L (1994-1995) with spacers to clear pod and then carb hat. Came to 10.95 inches and is clearly rubbing ever so slightly on the bottom of hood at 3 inches from center of TB at rear and 4 inches from TB at front on carb hat.
This is concurrent with measurements posted above being 11 inches.
Motown set up with Edel 4B TB(2.625) and hat is 10.67 so that allows about .28 inch more room!
I think I will have the Motown shaved at top base .50 inch to alllow more room. Need to verify the butterflies will not contact the runners.
05-16-2014, 07:48 AM
#32
Melting Slicks
Thread Starter
Not sure if this is pertenant to the OP but may be helpfull to any 84-CF owners that are desiring to come into 20th Century. Ouch!!
Anyway I measured carefull the height of my current Holley projection mani with the GM 7.4L (1994-1995) with spacers to clear pod and then carb hat. Came to 10.95 inches and is clearly rubbing ever so slightly on the bottom of hood at 3 inches from center of TB at rear and 4 inches from TB at front on carb hat.
This is concurrent with measurements posted above being 11 inches.
Motown set up with Edel 4B TB(2.625) and hat is 10.67 so that allows about .28 inch more room!
I think I will have the Motown shaved at top base .50 inch to alllow more room. Need to verify the butterflies will not contact the runners.
Anyway I measured carefull the height of my current Holley projection mani with the GM 7.4L (1994-1995) with spacers to clear pod and then carb hat. Came to 10.95 inches and is clearly rubbing ever so slightly on the bottom of hood at 3 inches from center of TB at rear and 4 inches from TB at front on carb hat.
This is concurrent with measurements posted above being 11 inches.
Motown set up with Edel 4B TB(2.625) and hat is 10.67 so that allows about .28 inch more room!
I think I will have the Motown shaved at top base .50 inch to alllow more room. Need to verify the butterflies will not contact the runners.
05-16-2014, 10:09 AM
#33
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Today on bench I have .001 clearance between the nut on shaft and the rail. If I shave ..50 off the top of mani I will have more clearance as it is under the rib-under the widest part of rail.
05-16-2014, 07:47 PM
#34
Suckin' gas, haulin' ass.
Member Since: Apr 2010
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The Hurricane is a great intake for the $$$.
I ran one on the 427 SBC in my 84 and went 9.30's@148mph with it unported OTB.
It is tall compared to most other intakes. 5.8" to the carb flange. That will be tough to fit under a stock C4 Corvette hood... On my 84 which is carburated... a QFT Q-950 carb came dead even with the bottom of the hood... I cut a hole in the hood and used the hood as the bottom of an air pan for a small forward facing hood scoop I had on the car until I cut it all out and installed the big cowl induction scoop it has now.
The Super Victor 2925 I have converted to EFI on my 92 is only 5.50" to the carb flange.
The taller intake is going to limit how tall and how good of a radius you can put on your elbow/TB adpater.... Ideally you would want it to be as tall and as gentel as possible....
My elbow/TB adpater on the 92 worked out to be only 3.5" tall to fit under the stock hood. I was lucky in that I had someone help me with my stuff that had already done it. I was able to take what he had done and tweek it to what I have on the car today.
A 90* elbow for the TB adapter works fine.
You do not need or want a divider in the elbow of a Normally Aspriated engine. The dividers are to help air distribution on Forced Induction engines with tight radius elbows.
The engine in my 92 was designed to be a 7000 RPM deal but it makes good power everywhere. The engine has an awesome TQ band from 3500 to 6000RPM.... dead flat 400RWTQ... it still has over 300RWTQ at 2500RPM so it's not like it's hurting for power down low.
3350LBS daily driver with working AC and all creature comforts. Other than a good clutch and rear gear the rest of the car is just an ordinary 92 Corvette. It's been 128mph in the 1/4 mile normally aspriated on 93 octane pump gas.
The right single plane intake is a great package.
BTW I recently convinced a C4 Corvette road racer on this board to buy a Holley 300-25and install it on his car.... His engine carburated but limited to 5800RPM max because of the stock crank, rods and hyper pistons.... 38RWHP and 40RWTQ across the board gains. It didn't loose any TQ anywhere and most people would tell you that putting a serious racing single plane intake like the 300-25 would have killed his engine...
Will
I ran one on the 427 SBC in my 84 and went 9.30's@148mph with it unported OTB.
It is tall compared to most other intakes. 5.8" to the carb flange. That will be tough to fit under a stock C4 Corvette hood... On my 84 which is carburated... a QFT Q-950 carb came dead even with the bottom of the hood... I cut a hole in the hood and used the hood as the bottom of an air pan for a small forward facing hood scoop I had on the car until I cut it all out and installed the big cowl induction scoop it has now.
The Super Victor 2925 I have converted to EFI on my 92 is only 5.50" to the carb flange.
The taller intake is going to limit how tall and how good of a radius you can put on your elbow/TB adpater.... Ideally you would want it to be as tall and as gentel as possible....
My elbow/TB adpater on the 92 worked out to be only 3.5" tall to fit under the stock hood. I was lucky in that I had someone help me with my stuff that had already done it. I was able to take what he had done and tweek it to what I have on the car today.
A 90* elbow for the TB adapter works fine.
You do not need or want a divider in the elbow of a Normally Aspriated engine. The dividers are to help air distribution on Forced Induction engines with tight radius elbows.
The engine in my 92 was designed to be a 7000 RPM deal but it makes good power everywhere. The engine has an awesome TQ band from 3500 to 6000RPM.... dead flat 400RWTQ... it still has over 300RWTQ at 2500RPM so it's not like it's hurting for power down low.
3350LBS daily driver with working AC and all creature comforts. Other than a good clutch and rear gear the rest of the car is just an ordinary 92 Corvette. It's been 128mph in the 1/4 mile normally aspriated on 93 octane pump gas.
The right single plane intake is a great package.
BTW I recently convinced a C4 Corvette road racer on this board to buy a Holley 300-25and install it on his car.... His engine carburated but limited to 5800RPM max because of the stock crank, rods and hyper pistons.... 38RWHP and 40RWTQ across the board gains. It didn't loose any TQ anywhere and most people would tell you that putting a serious racing single plane intake like the 300-25 would have killed his engine...
Will
05-16-2014, 08:30 PM
#35
Melting Slicks
What was the previous intake before the Holley?, cubes?
05-17-2014, 01:07 AM
#37
Melting Slicks
Oh yah, I'd run almost any other intake before one of those! How is the hood clearance on your new intake? Team G 7530 is a low single plane.
05-17-2014, 05:57 PM
#39
Suckin' gas, haulin' ass.
Member Since: Apr 2010
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I don't have a stock hood, so I can't comment there. It's a carbon fiber Toledo Pro hood without any undertray. I'm carb'd as well running a filter assembly that seals against the hood.
05-19-2014, 11:45 PM
#40
Melting Slicks
Thread Starter
the next parts I need to begin making the elbow is the spacer, which will be the base for the elbow and the thermostat housing, clearing the thermostat housing with the bottom of the throttle body needs to be taken care of first,
pics of 1" spacer (need 1" to allow for vacuum take offs and IAT sensor)
with adjustable thermo housing,
as you can see the thermo housing is quite tall and will probably cause a problem,
will probably need to use an old style thermo housing, keeping in mind the downward slope that the TB will take,
pics of 1" spacer (need 1" to allow for vacuum take offs and IAT sensor)
with adjustable thermo housing,
as you can see the thermo housing is quite tall and will probably cause a problem,
will probably need to use an old style thermo housing, keeping in mind the downward slope that the TB will take,
