single plain intake vortec

[rocketracer380]

have choice of gm duel plain eddy victor or gm performance single plain engine is 10:1 stock vortec heads .541" cam hyd roller

[1980RS]

have choice of gm duel plain eddy victor or gm performance single plain engine is 10:1 stock vortec heads .541" cam hyd roller

Here is what I have run recently with a Vortec headed 406. Stock heads and the GM Performance dual plane intake that went from 11.50's to 11.60's
I replaced the heads with a mild set of ported Vortec's and decided instead of running the dual plane again I ran the Eddy SV 2913 that I had ported over the winter. The car ran 11.02 off the trailer at 120mph and a 10.92 after that. I really feel the single plane was better than the dual plane. My cam is a hyd .488 flat tappet Elgin grind.

[BOOT]

I'm bout to change from a single plane to a dual on the vortec headed 350 I have but it's a stock TBI shortblock with stock FT cam. In a lighter car I might give the single plane a chance but I feel the dual plane will suit this heavy truck better. Also it will have manifolds for awhile, so maybe with a cam, LT headers and gear I'll try the single plane again later.

[skinny z]

Here is what I have run recently with a Vortec headed 406. Stock heads and the GM Performance dual plane intake that went from 11.50's to 11.60's
I replaced the heads with a mild set of ported Vortec's and decided instead of running the dual plane again I ran the Eddy SV 2913 that I had ported over the winter. The car ran 11.02 off the trailer at 120mph and a 10.92 after that. I really feel the single plane was better than the dual plane. My cam is a hyd .488 flat tappet Elgin grind.

Things that make you go hmm.
I'm less than a half tenth from 11's and have recently stepped up to mildly ported aftermarket Vortec heads (255 CFM on the intake, 4.03" fixture bore) on the 355 along with Comps XR288HR (236@.050). Also moved up a little with another 500 RPM in stall speed now seeing nearly 4k flash stall.
Haven't had any track time with the new combo however all other time slips came with an RPM Air Gap. Best of 11.46@109 corrected.
Might be that a single plane would be better suited. With the small amount of country road testing I've done, seem to like shifts between 6200-6400. It'll zing to 7k far too easily.
You've got me thinking...

[mag2555]

You have more of a delema then you know because Edelbrock does not make a duel plane Intake that's got the Victor name!

That being said a single plane Intake will likely not provide better performance unless the motor in question runs mostly from 5200 rpm and up.

[skinny z]

You have more of a delema then you know because Edelbrock does not make a duel plane Intake that's got the Victor name!

That being said a single plane Intake will likely not provide better performance unless the motor in question runs mostly from 5200 rpm and up.

I take it you're referring to the "gm duel plain eddy victor or gm performance single plain" in the first post?
I'm guessing that's three manifolds....

As for 5200 and up, how about shift recovery from 4-4500? Think the single plane would be at a disadvantage?

What's the thinking when adding CID (from 355 to 383) and the RPM range of the single plane. Can we pull the RPMs down 500 or so?

[F-BIRD'88]

Holley now has a new single plane intake for vortec heads.
It is the same height as a Vic JR. Season to taste with carb spacers for effect. Holley #300-264 Wish it had cast in rear water ports. They really help on 400 sbc's.
The plenum looks like it may respond to extended runner dividers added in much like other holley Dominators.

[F-BIRD'88]

SkinnyZ Call Comp and get them to grind you a custom grind version XFI hyd roller cam. Using XFI cam lobes #13082/#3038 ground on a 106 to 107 LSA.. It should get you down the track a bit quicker with open headers w collector extensions with either style intake.
All you have to do is call and ask Comp. need good valvesprings.

[DeezNutz]

I would run the single plane and try a 1" 4 hole spacer. If the car sees the majority of use on the track the single plane is the clear winner.

[skinny z]

SkinnyZ Call Comp and get them to grind you a custom grind version XFI hyd roller cam. Using XFI cam lobes #13082/#3038 ground on a 106 to 107 LSA.. It should get you down the track a bit quicker with open headers w collector extensions with either style intake.
All you have to do is call and ask Comp. need good valvesprings.

Not to derail the OP's thread too much, but your spec is very close to one I've pulled out of Torque Master (which may be a dirty word to some around here). Yours (284/234, 294/242) is one number on either side. 75-77 degrees overlap.
I'm looking at intake 13083 (288/238) and exhaust 3037 (288/236) on a 108. 72 degrees overlap.
The split pattern TM result might be very close to yours although the 108 LSA remains .
Open headers with extensions (cut outs). Have Comps recommended springs, tool steel retainers and Crower backset trunnion 1.6 rockers. (Backset needed for proper valvetrain geometry).
Thanks for the input. Once I have the current engine disassembled (schedule unknown atm) and have a look at what went sideways, I'll be starting my own thread on the build direction. Cam included.

[F-BIRD'88]

SkinnyZ Call Comp and get them to grind you a custom grind version XFI hyd roller cam. Using XFI cam lobes #13082/#3038 ground on a 106 to 107 LSA.. It should get you down the track a bit quicker with open headers w collector extensions with either style intake.
All you have to do is call and ask Comp. need good valvesprings.

Not to derail the OP's thread too much, but your spec is very close to one I've pulled out of Torque Master (which may be a dirty word to some around here). Yours (284/234, 294/242) is one number on either side. 75-77 degrees overlap.
I'm looking at intake 13083 (288/238) and exhaust 3037 (288/236) on a 108. 72 degrees overlap.
The split pattern TM result might be very close to yours although the 108 LSA remains .
Open headers with extensions (cut outs). Have Comps recommended springs, tool steel retainers and Crower backset trunnion 1.6 rockers. (Backset needed for proper valvetrain geometry).
Thanks for the input. Once I have the current engine disassembled (schedule unknown atm) and have a look at what went sideways, I'll be starting my own thread on the build direction. Cam included.

I am curious how solid roller lifters (very tight valve lash) would run on these lobes. I am not a big fan of hyd roller lifters and high rpm... (not a juice lifter guy)

[skinny z]

SkinnyZ Call Comp and get them to grind you a custom grind version XFI hyd roller cam. Using XFI cam lobes #13082/#3038 ground on a 106 to 107 LSA.. It should get you down the track a bit quicker with open headers w collector extensions with either style intake.
All you have to do is call and ask Comp. need good valvesprings.

Not to derail the OP's thread too much, but your spec is very close to one I've pulled out of Torque Master (which may be a dirty word to some around here). Yours (284/234, 294/242) is one number on either side. 75-77 degrees overlap.
I'm looking at intake 13083 (288/238) and exhaust 3037 (288/236) on a 108. 72 degrees overlap.
The split pattern TM result might be very close to yours although the 108 LSA remains .
Open headers with extensions (cut outs). Have Comps recommended springs, tool steel retainers and Crower backset trunnion 1.6 rockers. (Backset needed for proper valvetrain geometry).
Thanks for the input. Once I have the current engine disassembled (schedule unknown atm) and have a look at what went sideways, I'll be starting my own thread on the build direction. Cam included.

I am curious how solid roller lifters (very tight valve lash) would run on these lobes. I am not a big fan of hyd roller lifters and high rpm... (not a juice lifter guy)

I can't comment on the solid lifter but I CAN say I may have exceeded the practical limits of my short travel hydraulics. Comps 26918 springs (125/seat, ~340/open) might not have enjoyed life beyond 6500 RPM with the XR cam at .576" lift. This is going to be part of the teardown evaluation. My best guess though is that I lost the thrust button for the retro-fit roller somehow having messed it up with the last head/cam swap.

[F-BIRD'88]

Not to derail the OP's thread too much, but your spec is very close to one I've pulled out of Torque Master (which may be a dirty word to some around here). Yours (284/234, 294/242) is one number on either side. 75-77 degrees overlap.
I'm looking at intake 13083 (288/238) and exhaust 3037 (288/236) on a 108. 72 degrees overlap.
The split pattern TM result might be very close to yours although the 108 LSA remains .
Open headers with extensions (cut outs). Have Comps recommended springs, tool steel retainers and Crower backset trunnion 1.6 rockers. (Backset needed for proper valvetrain geometry).
Thanks for the input. Once I have the current engine disassembled (schedule unknown atm) and have a look at what went sideways, I'll be starting my own thread on the build direction. Cam included.

I am curious how solid roller lifters (very tight valve lash) would run on these lobes. I am not a big fan of hyd roller lifters and high rpm... (not a juice lifter guy)

I can't comment on the solid lifter but I CAN say I may have exceeded the practical limits of my short travel hydraulics. Comps 26918 springs (125/seat, ~340/open) might not have enjoyed life beyond 6500 RPM with the XR cam at .576" lift. This is going to be part of the teardown evaluation. My best guess though is that I lost the thrust button for the retro-fit roller somehow having messed it up with the last head/cam swap.

ya I'd be wanting to run a lot more valve spring force on these fastie cam lobes.. Don't like all the fuss on hyd roler lifters. (limited travel etc etc) Haven't tried solid roller lifters on these lobes, but I be very tempted.. My 406 used to trap at 6700 rpm as it was. (hft cam/lifters)
The xfi lobes look good but the hyd roller lifter bs $$$ is scarry.... (6500 rpm and beyond and consistant perf)
The chance that you may have now lost that cam button is a scarry thought. Good luck.

[mag2555]

How did the OPs post here go side ways into Cam talk here?

[skinny z]

How did the OPs post here go side ways into Cam talk here?

Well, I can take some of the blame for that...

Not to derail the OP's thread too much...

I had a similar question to the OP's and it kind of morphed from there. I did answer my initial question but then it went on to something else (as it sometimes does).
My apologies.