I need a measurement..., from a V8 converted 914 Options

[bondo]

Can someone measure from the flat surface the intake manifold seals to (ya know, the one you have to put a bead of silicone on, lightly bolt up the manifold, let it set, then torque it down only to have it leak anyways) to the underside of the engine lid?

I need to make some intake manifold mods for my LT1. There was a rumor that the intake would just flip around, putting the trottle body at the rear and less in the way. I have just confirmed that it won't flip around. It's VERY close though. ports line up, holes line up, but those two horizontal sealing surfaces are different from front to back.

I now have two options:

1. Modify those sealing surfaces

2. Mount the throttle body elsewhere on the manifold

I'm leaning towards #1 because it looks easier. If I don't have room to mount the throttle body on the top of the manifold then that will force me to option #1.. which is why I need the measurement. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

[Aaron Cox]

(IMG:http://www.914world.com/bbs2/html/emoticons/thisthreadisworthlesswithoutpics.gif)

[bondo]

Ok, hold on (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

[914GT]

Not an easy thing to measure. Somewhere around 9" for an SBC.

[bondo]

Here's the intake on forwards, from the top:

[bondo]

Here it is on backwards:

[bondo]

The last pic doesn't show much.. here's a closeup of the sealing area I'm talking about, at the rear:

[bondo]

Here's the best pic, it clearly shows the ends of the lifter valley are not the same:

[bondo]

QUOTE (914GT @ Feb 2 2005, 09:09 PM)

Not an easy thing to measure. Somewhere around 9" for an SBC.

Oof, that's not much. I assume that's with no rain tray?

[914GT]

Royce, that's correct. And thats at the rear. Might be a little more at the front.

[scotty914]

any desent machine shop could tig on an extention and mill it flat, i would not think it should be more than 150 bucks

[bondo]

QUOTE (914GT @ Feb 2 2005, 09:18 PM)

Royce, that's correct. And thats at the rear. Might be a little more at the front.

Cool, thanks. The manifold is already 6" high.. looks like option #1.

[bondo]

QUOTE (scott thacher @ Feb 2 2005, 09:22 PM)

any desent machine shop could tig on an extention and mill it flat, i would not think it should be more than 150 bucks

Hehe, that's exactly what I was thinking of doing. Fortunately I have access to a TIG and a mill, so it'll be much less than $150 (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

[Brett W]

just get a Victor JR and run a four barrel style throttle body. That should be plenty low profile.

my picture is too big and I am too lazy to resize it.

[bondo]

That's made for a carb, right? Where would I put the injectors?

[skline]

QUOTE (bondo @ Feb 2 2005, 10:03 PM)

That's made for a carb, right? Where would I put the injectors?

Hahaha, He means go with a carb instead of the FI silly. Looks like you are making some progress on it. Did you ever post pictures of the car you are going to put this all in? If not, now is a good time.

[Andyrew]

Ya, this is MPFI not TBI where talking about here.

You COULD always put the injectors in the runners (like the RPM MPFI manifold is.... I was considering it....)

[Andyrew]

OH ya, What about the dizzy???

wouldnt the piping hit the dizzy???

I REAALLLY want to run a tuned port injectoin like this setup... buuuut the obvious arises...

[Brett W]

No I am talking about the carb intake manifold with a FI throttle body on it. You just drill the bungs for the fuel injectors and mount them at the head like the LT1 manifold. You cuold probably use the fuel rail from the LT1 as well as the fuel injectors.


Andrew
The dizzy is driven off the front of the motor by the cam. LT1s and LT4s did away with ole HEI and went to a front mounted setup.

[bondo]

QUOTE (skline @ Feb 2 2005, 11:13 PM)

Did you ever post pictures of the car you are going to put this all in? If not, now is a good time.

Yup, sure did. You can find them here.

Changing manifolds is way too much work. This manifold is pretty complicated. EGR and PCV are incorporated into it. I also really liked the way this engine performed in the Firebird before I pulled it. I don't want to mess with it too much. The distributor is on the front of the engine, so that won't be a problem.

I think option #1 is the way to go.