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Indimar MCX Marine Vortec Intake

Old 03-07-2019, 11:54 AM
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Indimar MCX Marine Vortec Intake

Just thought I would show you guys an intake I finally got my hands on that I have been trying to find for 3-4 years now. I paid $500 for the intake itself. I am going to send it to Lloyd Elliot so that he can port it to match the Assault Racing heads he ported for me. I found the fuel rail itself new from Indimar via Michigan Motorsports for $180 and it is a returnless style. Will be adding a Corvette LS1 fuel filter with the built-in regulator. It will be going on the 0411 PCM 24x ignition system equipped L31 350 Vortec in my 1997 Express van. Will get to see what kind of power it can make. The cam is relatively small but the heads flow 274/183 @ .500" and 291/193 cfm @ .600". Combined with my Comp custom grind cam with the 1.7 rockers gives 0.578" lift on both sides. 215/224 @ .050 on a 110 LSA. I feel if I make less than 450 HP I will be doing something wrong.

Out of the box the Indimar MCX that used this intake was a Vortec 350 long block with a F-car LT1 cam and high flow marine manifolds. Using this intake and Indimar's calibration it was good for a SAE Marine HP rating of 350 HP.

I like the runner design a lot better than a StealthRam and feel they can flow very well once they are cleaned up and opened up to match the head ports.







Last edited by Fast355; 03-07-2019 at 11:58 AM.
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Old 03-07-2019, 12:19 PM
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Re: Indimar MCX Marine Vortec Intake

Nice looks like street and performance one.
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Old 03-07-2019, 02:04 PM
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Re: Indimar MCX Marine Vortec Intake

That's pretty interesting
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Old 03-07-2019, 02:18 PM
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Re: Indimar MCX Marine Vortec Intake

What'dya think Tony, gonna fit under the firebird hood? This is interesting, have to wait n see how this works. I like the straight down direction of the runners, and that they don't look as long. Maybe have to find one and hog it out....
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Old 03-07-2019, 02:46 PM
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Re: Indimar MCX Marine Vortec Intake

Originally Posted by 427seven View Post
What'dya think Tony, gonna fit under the firebird hood? This is interesting, have to wait n see how this works. I like the straight down direction of the runners, and that they don't look as long. Maybe have to find one and hog it out....
Indimar also has a very ornate upper plenum design for this manifold base with a LS single blade drive by wire throttle body on it. The ribs are decoration only. The inside of the plenum is the same as the one above. Maybe a little shorter in height.
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Old 03-07-2019, 03:02 PM
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Re: Indimar MCX Marine Vortec Intake

Is this no longer in production? Why did it take you so long to get one?
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Old 03-07-2019, 03:04 PM
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Re: Indimar MCX Marine Vortec Intake

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Old 03-07-2019, 03:46 PM
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Re: Indimar MCX Marine Vortec Intake

Originally Posted by 427seven View Post
Is this no longer in production? Why did it take you so long to get one?
Indimar thinks they are gold plated as far as pricing goes. I have also only seen a hand full of this style of upper plenum with the TPI style throttle body. Also a lot of the used ones end up with corroded coolant passageways since they are not brass or epoxy coated.
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Old 03-07-2019, 03:51 PM
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Re: Indimar MCX Marine Vortec Intake

Learn something(or see) new everyday I figured that this would be like the ramjet 350 manifold - curious to see how it fits under hood
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Old 03-07-2019, 03:55 PM
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Re: Indimar MCX Marine Vortec Intake

Originally Posted by zman1969 View Post
Learn something(or see) new everyday I figured that this would be like the ramjet 350 manifold - curious to see how it fits under hood
Not going under a hood per se. Rather under the firewall of an Express van. Which is also very height challenged and the intake will have to fight for room.
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Old 03-07-2019, 04:16 PM
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Re: Indimar MCX Marine Vortec Intake

Street and performance sold these under the name “ram port” I totally dig the way they look.
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Old 03-07-2019, 04:40 PM
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Re: Indimar MCX Marine Vortec Intake

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Old 03-07-2019, 04:48 PM
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Re: Indimar MCX Marine Vortec Intake

Well that answers that question.... Thanks for the link Tuned Performance....
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Old 03-07-2019, 04:57 PM
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Re: Indimar MCX Marine Vortec Intake

Anyone have and idea which foundry cast these?
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Old 03-07-2019, 04:59 PM
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Re: Indimar MCX Marine Vortec Intake

It says bb on the bottom, isn’t that the same foundry that did slp runners ?
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Old 03-07-2019, 05:18 PM
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Re: Indimar MCX Marine Vortec Intake

Yup, but you weren't supposed to say it out loud lol
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Old 03-07-2019, 05:21 PM
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Re: Indimar MCX Marine Vortec Intake

Lmao
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Old 03-07-2019, 05:54 PM
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Re: Indimar MCX Marine Vortec Intake

Originally Posted by Fast355 View Post
Not going under a hood per se. Rather under the firewall of an Express van. Which is also very height challenged and the intake will have to fight for room.
Here is the engine bay it is going into. I ran it with a Holley spreadbore double pumper on a dual plane manifold for almost a year at one point too. It was a proof of concept/research project for myself. I found you can run the ignition/trans/etc on the 0411 PCM and use a carb for fuel. It really opens up some drag car possibilities with the LS. The carb manifolds are fairly inexpensive.


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Old 03-07-2019, 06:04 PM
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Re: Indimar MCX Marine Vortec Intake

I am just hoping there is enough room between the lower intake and thermostat opening to fit a 1991 Caprice thermostat housing so that I can keep it simple and use the stock Vortec upper hose and routing. Worked with the carb intake but it looks like it will be a tight fit with this manifold. That is a stock TBI F-car housing in the picture but runs the hose right into the back of the compressor due to its angle. The B-car one exits on the back side and faces at an angle rearward just like a vortec truck.
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Old 03-07-2019, 06:06 PM
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Re: Indimar MCX Marine Vortec Intake

Interesting. I do like the design

on a side note, if you are goin thru the trouble of running ignition trans etc on the 0411, why wouldnt you keep the few extra wires to run a efi setup? Lol you still need to program the ecm for ignition and trans shifting. Seems like a waste of potential to lose the injection
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Old 03-07-2019, 06:09 PM
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Re: Indimar MCX Marine Vortec Intake

Originally Posted by Orr89RocZ View Post
Interesting. I do like the design

on a side note, if you are goin thru the trouble of running ignition trans etc on the 0411, why wouldnt you keep the few extra wires to run a efi setup? Lol you still need to program the ecm for ignition and trans shifting. Seems like a waste of potential to lose the injection
Its really not! The carb manifolds and carbs generally make more HP. You also do not have to mess with getting larger injectors and the like. Its also nice to be able to reuse the $$$ fuel system that is already in that kind of car down to the carb.
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Old 03-07-2019, 06:57 PM
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Re: Indimar MCX Marine Vortec Intake

Eh i can see the fuel system part i guess. In a thirdgen i wouldnt ever consider carbs. They may make more peak hp but thats highly dependent on the intake you use and they generally will not match overall curve power from longer runner intakes. A tiny amount of methanol injection or even gas at the tb would make some of the power back that carbs make due to intake air cooling. But for a sbc that would mean something between a superram and stealth ram perhaps. The lsx factory intakes are perfect but to bad there isnt a design like them for sbc. A superram based on the first tpi would be ideal
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Old 03-07-2019, 08:34 PM
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Re: Indimar MCX Marine Vortec Intake

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Old 03-07-2019, 08:43 PM
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Re: Indimar MCX Marine Vortec Intake

I believe this one is a street and performance with some tunnel ram style spacers. I've emailed this guy to try and make a deal on the intake and all of the other tpi stuff. I wish the add had a phone number as it looks to be within a few miles of my shop according to the map.
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Old 03-07-2019, 09:01 PM
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Re: Indimar MCX Marine Vortec Intake

Cool find
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Old 03-09-2019, 09:27 PM
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Re: Indimar MCX Marine Vortec Intake

What's with the magazine quip by Jbuchanan, who the hell is Wayne?
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Old 03-09-2019, 09:37 PM
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Re: Indimar MCX Marine Vortec Intake

It's a joke, there is a thread about an Iroc with 344 miles that went to auction and sold for alot of money that obviously had some paint repair. When the seller got called out on it, he attacked everyone who questioned it. He is pals with Wayne Carini and basically threatened any of us that simply questioned the "originality" of the car.
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Old 03-09-2019, 09:39 PM
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Re: Indimar MCX Marine Vortec Intake

O K, that IS funny....
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Old 03-09-2019, 09:46 PM
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Re: Indimar MCX Marine Vortec Intake

Originally Posted by 427seven View Post
O K, that IS funny....
You should find the thread and read last 4 pages if you want a real laugh.
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Old 03-09-2019, 09:59 PM
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Re: Indimar MCX Marine Vortec Intake

Got a link or know the thread name? I like a good laugh!
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Old 03-09-2019, 10:04 PM
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Re: Indimar MCX Marine Vortec Intake

Search 344 mile 1989 iroc z. It will pop up first.
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