LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Singal plane help need guys..

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Old 10-21-2007, 08:35 PM
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I think if i ever went with a different intake then stock i would pony up and get a fabricated one. With my turbo setup the intake isn't near as important as it would be otherwise. I dont need to spin my motor past 6,200 =]
Old 10-21-2007, 08:37 PM
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What are you guys spending on these singel plain setups?
Old 10-21-2007, 08:51 PM
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very intrested keep this up guys
Old 10-21-2007, 09:04 PM
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Here is a single plan elbow for sale, its already tapped for vac lines. https://ls1tech.com/forums/showthrea...90#post7970190
Old 10-21-2007, 10:33 PM
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For everything on a single plane setup?

I was about $2,000 for the whole shabang.
Old 10-22-2007, 01:39 AM
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Originally Posted by Paul Bell
Being that any SBC manifold will bolt on the LT1, how do you guys think these manifolds will do?

There are a few "Ram Air" type manifolds out there similar to this:
The Stealth Ram will work, you just have to cut a section out of the upper rear part of the plenum to clear the cowl. (Yeah, I know, easier said than done.)

Originally Posted by Paul Bell
Or, Wilson has a two piece composite modular manifold, they claim some pretty good numbers, I have no reason to dis-believe them, they have a very good reputation:
I actually called up Wilson to get the lowdown on this intake a few weeks ago. They basically recommended against trying to use it on an LT1 because of the cooling ports issue. Composite cracks pretty easily when it gets too hot, so when they designed that manifold, they made it so that it utilizes both the front and rear coolant crossover ports in the SBC heads. Then they included a third coolant passage that runs the full length of the manifold and connects the front and rear lateral crossover ports. This was to minimize any hot spots from engine oil splashing the bottom of the manifold and to prevent the manifold base from splitting under load.

The price they quoted me was $750. After factoring in that, plus the extra fab work/plumbing you'd have to do to run coolant through it on an LT1, IMO it just makes more sense to stick with an aluminum manifold.
Old 10-22-2007, 10:14 AM
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Originally Posted by Speed Density
For everything on a single plane setup?

I was about $2,000 for the whole shabang.
Wow I guess that stuff adds up fast.
Old 10-22-2007, 12:50 PM
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dont you have to get the mounting holes on Gen1/TPI intakes worked on a little bit to fit LT1 heads?
Old 10-22-2007, 03:34 PM
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Originally Posted by LT1Z/28
dont you have to get the mounting holes on Gen1/TPI intakes worked on a little bit to fit LT1 heads?
Correct.
Old 10-22-2007, 04:02 PM
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Wow 2k is what you guys are spending on this? a F.A.S.T sounds cheap now!
Old 10-22-2007, 04:06 PM
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Originally Posted by slick1851
Wow 2k is what you guys are spending on this? a F.A.S.T sounds cheap now!
Fast is cheap if you want to go fast
Old 10-22-2007, 06:19 PM
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$2k is expensive, but the gain is well worth it.

Victor E, Injectors, Rails, Elbow, Throttle Body, Sensors etc..
Old 10-23-2007, 04:38 PM
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Originally Posted by Speed Density
Is the super vic a 4150 flange?

Because that elbow you were looking at is a dominator flange.

Tony.


Thanks for the warning. I was hoping that since he listed part numbers he had the 4150 flange and it is. So I'm going to fill the bolt holes in and redrill the flange mounting bolts. This way I can turn the elbow so it faces the front of the motor. It is taller then what I made up. So i may have to mill the flange down some or have the spray bars put in the elbow.

Do you recall how tall your manifold is? From the bottom flange that seals aginst the block to the carb flange?

I would like to know if this intake is taller then what you guys are using. It measures about 6.5 inches.

Thanks Mike
Old 10-23-2007, 07:01 PM
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Originally Posted by Speed Density
$2k is expensive, but the gain is well worth it.

Victor E, Injectors, Rails, Elbow, Throttle Body, Sensors etc..
I know its worth it, but thats kinda of a shame that LS1 guys pay alot alot less for a FAST manifold

While LT1 guys are shelling out all that cash for custom made parts

Wtf you would think by now somone would make a affordable manifold by now
Old 10-24-2007, 06:42 PM
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Originally Posted by slick1851
I know its worth it, but thats kinda of a shame that LS1 guys pay alot alot less for a FAST manifold

While LT1 guys are shelling out all that cash for custom made parts

Wtf you would think by now somone would make a affordable manifold by now
It is for sure worth it
when I shift 3rd gear at 7200 it feels like I hit a N2O button
Old 10-25-2007, 11:45 AM
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Are you single plane guys using the 4150 style or 4500 style flange on the manifold. Just wondering if the 4500 has a larger "throat" or entrance to the runners that would be of benifit.



Nick
Old 10-25-2007, 01:05 PM
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Originally Posted by jakesz28
I still like this if you mill off the water neck and use a nitrous plate.

I recognized the background and the engine.

All motor here.

FWIW, that is a converted SuperVic, not a Vic Jr or Vic E. Note the carbon fibre filler plate below the runners. The red manifold in another post has that feature also. The heads on this one are also VERY special. The S'Vic runner length helped make the power required by the customer.
Old 10-25-2007, 01:13 PM
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What about us who don't care about strip-racing, but like torque? Would a dual-plane offer any benefits over the stock manifold w/o any HP loss?
Old 10-25-2007, 05:20 PM
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I would be interested in a good back-to-back comparrison of just the manifold swap. Everything I have seen is on a whole new engine. The NHRA Super Stock engine builders I have talked to say that is not the way to go.
If I get time I'll probably try one next year just to see for myself. I had Hogan make a sheet metal intake for my Super Stock 350", didn't cost much more than this swap, and everybody swears it would blow a single plane away. If I can get my hands on one to test I'll find out.
Old 10-25-2007, 11:31 PM
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Originally Posted by Ed Wright
I would be interested in a good back-to-back comparrison of just the manifold swap. Everything I have seen is on a whole new engine. The NHRA Super Stock engine builders I have talked to say that is not the way to go.
If I get time I'll probably try one next year just to see for myself. I had Hogan make a sheet metal intake for my Super Stock 350", didn't cost much more than this swap, and everybody swears it would blow a single plane away. If I can get my hands on one to test I'll find out.
Two manifolds with very different runner lengths will probably want different valve events to optimize their performance. The SuperVic is probably working on the second harmonic and the LT1 on the third. The second gives stronger ramming pulses so you can muck it up with improper valve events. The optimum valve events for an LT1 would most probably be wrong for the longer runner S'Vic.

FWIW, the black and grey single plane engine shown made excellent torque from the low 2000s to the very high 6000s. It was for a street sleeper F-bod. Over 1.5 fwhp/cube with almost no lope at idle. The heads, manifold and cam worked well together. The engine cost a LOT.

[edit] BTW, it's a 396. 1.5+ * 396 = ....

Last edited by Old SStroker; 10-26-2007 at 10:20 PM.


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