Been thinking of fabricating a one off LT1 manifold for my current LT1 build that will have longer runners to really kick in midrange and low topend torque and power. The LS1 manifold design looks like a workable design with runner at least twice as long at the stock LT1 runners. The engine is a 383 with bowl ported heads that flow quite a bit better than the stockers and will likely be running a GM hot cam ( unless I find something that looks like it would be a better compromise of low/mid torque with solid horsepower up top. I'm running an auto transmission. From the info. I've run across so far I think making a copy of the general layout of the LS1 manifolds might be the easiest to pull of without tons of time put in it. Anyone know of this having been done or have any general information that might be helpful?
Thanks, Michael

 

I don't know of anyone who has used a LS1 manifold as a base for a conversion. The new fad is converting a single plane manifold like the Super Vic or Victor Jr to EFI. Search for single plane conversion and you can get lots of info.

 

You're not gonna find a whole lot of info on something like this, basically because the man who manages to engineer an LTx intake that's based on an LSx folded hands intake will potentially have alot of money (or races) at stake, if you get my drift.

 

No cause you can't do it. The intake runners are next to each other not spread out like a LS1 intake.

Basically you can't do this cheaply, that's why nobody does it that way.

Bret

 

The idea isn't to convert an LS1 intake, if the port configuration matched that would be fine. From some of the dyno charts I've seen on the lingenfelter superram intakes I'd bet they'd feel way faster on the street with a hot cammed 383 and automatic than the LT1 intake. I'd bet that torque and throttle response at small throttle openings ( 1/8 to 1/2 throttle) would be far stronger with the mid length tuned runners while only giving up a modest amount of peak HP up to 5500 or 6000 RPM's.
The problem with the superram is they cost a grand, they are prone to leaks and are a bitch to R&R. I've fabbed sheet metal intakes and converted carb intakes to multiport EFI so I have a pretty good idea of the time involved with building one. The general layout of the LS1 manifold looks like it might be promising because it has longer runners than the LT1 intake and is compact enough to facilitate easy removal in the LT1 engine bay.
From what I gather so far no one who's seen this post knows of any other manufactured or one off intakes for an LT1 with mid length runners other than the superram.
Thanks for the replies.

 

From what I gather so far no one who's seen this post knows of any other manufactured or one off intakes for an LT1 with mid length runners other than the superram.
Thanks for the replies.[/QUOTE]

Heeeeeere ya go



Also Bret did a cut down stealthram, he may have a pic.



David

 

Oh, that's just awsome.

 

There was a shop in Berea Ohio that built a 96 Vette for the One Lap of America race that had a sheet metal manifold with long runners on an LT1. (supercharged) In the late 90s they also built special model Corvettes for Chevrolet. The name of the place was Mallet Motorsports. Owner was Chuck Mallet. They could make dam near anything for the LT1. Warning, they are very expensive! Im not sure if they are still in business, havent been by there in 5 yrs.

 

Heeeeeere ya go



Also Bret did a cut down stealthram, he may have a pic.



David[/QUOTE]



That's the one I had Wilson do for me for the kids car.
Bring your checkbook as that's over 3500 dollars worth of intake.

 

that Wilson looks cast. Why aren't there more like it around?

 

I think I hold the patent on that one.
They made it look that way for the "stock" look.
3500+dollars is another reason.

 

So, how did it work?

 

Haven't done a full evaluation on it yet. Had a cam bearing failure(spring pressure and RR ratio). The block is having roller cam bearings installed right now.
We will see in a couple of months.
Wilson said it out flowed one of "his" Super Victor intakes.
This intake is WAY to big for the average build with stock head casting's. I have ProTopline heads that have been converted.

 

Cheston,

You would be amazed of what you can do with sheetmetal or weld. A glass beader and some steel shot and time and anything can look as cast.

Racerdude,

How much pressure and rocker arm did it take before you had the cam bearings go BOOM?

Bret

 

800 on the nose and 1.8RR'S
The bearings didn't go out,there was metal in the oil and I pulled it down to find the cam bearing's excessively worn. I figure it was from starting with no oil pressure even though it was primed the first time.After that it wasn't.
An accumulator would have prevented it but where ya gonna mount a 1gal unit. A two qt may have done it but it would be iffy and the mounting thing again.
Roller bearings will fix it permanently.