this Intake manifold possibile?

[stockchevy1983]

thanks pauly for great info. thats all i wanted to know, the simplest bolt on intake for these trucks

[19doug90]

Originally Posted by stockchevy1983

thanks pauly for great info. thats all i wanted to know, the simplest bolt on intake for these trucks

wow so confused i dont see a post from you anywhere in this thread.

might want to read what it says under the intake tho, specifically says its for race cars pulling 8000 rpms with vortec heads.

super short runner length = major loss in low end tq

[MSlewis]

SUPER VICTOR E-TEC/VORTEC EFI (Up to 8000 rpm)
Super Victor Vortec EFI is based on the Super Victor Vortec manifold #2913. Designed for racers using Vortec cast iron or the all-new Edelbrock E-Tec aluminum cylinder heads, this manifold offers the same awesome top-end horsepower, throttle response and advanced design features as Super Victor #2925. Designed specifically to enhance the performance of Edelbrock E-Tec or Vortec cylinder heads (also known as L31), the #2913 is the most powerful intake available for these Chevy production heads. Runners have a 2.60 square-inch cross-section.

Big ports! Could make for interesting turbulence/velocity @ head cross section.

Sounds like a bunch of work, esp when a marine intake pretty much bolts a 96-2000 Vortec 305/350 truck.

Not really,just machine the top side of the plenums ribs flush and bore the opening for the TB,drill & tap the mounting holes.
Would love to be able to use the STOCK vortech intake but there seems to be discrepancies as to wether the poppets or multechs can handle extended higher pressures. IMO that intake screams in both TQ/HP up to the 5800 redline,just don't know about flow with the added cubes. I built my engine for 2500-5600 rpm range so I could appreciate not having to spend extra cash on an intake. Has an AirGap on it now, wish it came in a MPFI version.

[Pauly]

In your previous post you were saying that it would nice to not have to re-engineer your throttle body and cruise control cable and bracketry.
The Vortec Victor JR. EFI would allow that.

If you allready have a Performer RPM Airgap, you coudl get taht converted to EFI by getting bungs welded in and go witha custom fuel rail setup.
http://www.hotrodsolutions.net


As for the MPFI upgraded spider NOT being up for high fuel pressure. I know for a fact that it can be run at 100psi of rail pressure, it has been done more than once.
According to Westers they can get 28 pph from a flow matched poppet style spider.

http://westersgarage.eidnet.org/injectors.htm

peace
Pauly

[Pauly]

Originally Posted by 19doug90

wow so confused i dont see a post from you anywhere in this thread.

might want to read what it says under the intake tho, specifically says its for race cars pulling 8000 rpms with vortec heads.

super short runner length = major loss in low end tq

Its runner are no shorter than the Ramjets or LT1's intake runners. Both of those engines make great low rpm torque.

With proper PCM tuning, gearing, torque converter etc etc, this intake could be a great intake esp. for 350's, 355's, 383's, and 396 cube smallblocks.

I owuldnt hesitate to run it on my truck, I probably woudl have if it was around when I did my marien intake conversion.

peace
Pauly

[Pauly]

This MPFI intake is for Vortec heads
Lower intake
http://www.dougrussell.com/partscata...1,21,22,19,4,3

T-body and flame arrestor
http://www.dougrussell.com/partscata...1,21,22,19,4,3
As is this MPFI tunnel Ram single plane intake.

Lower intake and fuel rails

http://www.dougrussell.com/partscata...3,21,20,18,7,6

Upper plenum and t-body
http://www.dougrussell.com/partscata...6,24,25,22,5,4

Just some more options for Vortec heads.
These intakes make lots of torque as they MUST get very heavy boats up out of teh water. Some of the loads are quite high in marine applications.

peace
PAuly

[19doug90]

Originally Posted by MSlewis

Designed for racers using Vortec cast iron or the all-new Edelbrock E-Tec aluminum cylinder heads,

just figured id point out that while you can do anything with any combo, this intake is designed for high reving motors, and that your relatively stock motor is going to see a noticeable loss in low end torque with a direct swap from the stock manifold.

The marine intake swap is so popular on the trucks because it is also an intake designed for torque, not high end horsepower.

I dont think guys looking for a bolt on intake to their stock l31 would be perticularly happy with that intake

[MSlewis]

Originally Posted by 19doug90

just figured id point out that while you can do anything with any combo, this intake is designed for high reving motors, and that your relatively stock motor is going to see a noticeable loss in low end torque with a direct swap from the stock manifold.

The marine intake swap is so popular on the trucks because it is also an intake designed for torque, not high end horsepower.

I dont think guys looking for a bolt on intake to their stock l31 would be perticularly happy with that intake

I agree 100%, especially with the last statement. For those with a STOCK vortech truck, I dont think there's a better intake than the stock one. With more cubes, big cam, big valve high flow heads, it could warrant more flow than that intake can supply for the HP #'s. There inlies the dilemna about what to run that will work properly.The 383 generally puts down about the same torq as a mildy built-for-torque 350, but using a bigger camshaft, wich in turn can allow you to rev higher and create more HP. Only problem with that is airflow #'s. StealthRams site list good max flow specs, comparable to the Airgaps, and the ports are nowhere near 2.6" like the Victors(wich I'll agree are WAY too big). I'm really starting to lean that way and do the conversion.

Anyone know of a site or magazine article that does a comparison using stock,stealth,ramjet,victor efi on the same engine???

[Pauly]

It is my opinion that the marine cross ram intake is superior to the stock L31/30 intake in terms of power and torque production from idle to the PCM's rpm limit of 5800 rpm, even on a bone stock engine.
My low rpm torque and high rpm power from my bone stock L31 longblock went up after my marine intake retrofit. Reason, same 8" runner length as stock, but with more plenum volume, ever so slightly larger runner, and NO internal injector debris obstructing airflow through the plenum.

peace
Pauly

[MSlewis]

Originally Posted by Pauly

This MPFI intake is for Vortec heads
Lower intake
http://www.dougrussell.com/partscata...1,21,22,19,4,3

T-body and flame arrestor
http://www.dougrussell.com/partscata...1,21,22,19,4,3
As is this MPFI tunnel Ram single plane intake.

Lower intake and fuel rails

http://www.dougrussell.com/partscata...3,21,20,18,7,6

Upper plenum and t-body
http://www.dougrussell.com/partscata...6,24,25,22,5,4

Just some more options for Vortec heads.
These intakes make lots of torque as they MUST get very heavy boats up out of teh water. Some of the loads are quite high in marine applications.

peace
PAuly

I'm confused by the pics, you running the first or second marine intake? Is that first one dual plane? Both look expensive if having to get them from mercruiser dealer. What was the cost?

[Pauly]

Originally Posted by MSlewis

I'm confused by the pics, you running the first or second marine intake? Is that first one dual plane? Both look expensive if having to get them from mercruiser dealer. What was the cost?

I am not running either of those intakes, the 1st 1 is a dual plane MPFI intake, teh 2nd intake is a Scorpion or Black Scorpion single plane tunnel ram intake.

I am using a cross ram Mercrusier intake manifold, which looks exactly like teh stock Vortec 305/350 manifold except it has conventional external fuel rails and injectors.(inside the marine intake has a flat floor rather than the mess that the L31 intake has)

Here it is
http://www.mercruiserparts.com/Show_... AND+FUEL+RAIL
In order to look at the prices of the link I just provided, you need to go over to the list on the left top of the link and select INTAKE MANIFOLD AND FUEL RAIL. Then the prices for teh intake and other parts will be displayed.

Yes these parts are VERY expensive if you buy them new from a Mercruiser dealer.

PAGE 27 OF THIS LINK TELLS YOU EXACTLY WHERE TO BUY BOTH NEW AND USED CROSS RAM INTAKE MANIFOLDS(6TH post from the top). pLUS IT DETAILS WHERE YOU CAN BUY A VER NICE INSTALL KIT WITH GM COLOUR CODED INJECTOR WIRES AND WEATHERPACK CONNECTORS FOR $275.

the Holy Bible of Instaling THE Marine intake on a Vortec 350 equipped truck/Hoe/Burb/Vanhttp://www.pacificp.com/forum/viewtopic.php?t=317

I did my COMPLETE marine intake conversion for $980 including PCM tuning.(slight VE table and Injector Constant tuning). This included the upper and lower plenums, 4BAR FPR, stainless steel fuel rails, 8 flow tested and cleaned EV6 injectors(design used on LS2 and LS7)(pretty much everything pictured here http://www.mercruiserparts.com/Show_... and+Fuel+Rail

I was the 1st Canadian and 2nd North American to complete this swap.(as far as we know) There was sunstantial time and energy expended in studying the feasibility of the marine intake conversion. My personal truck is far from actually needing this conversion, I did it to help out all teh guys who need more fuel for their stroker, dry nitrous and forced induction setups.

The marine intake (cross ram L31 look alike) uses the stock cruise control and throttle cables, stock MAP sensors and stock t-body, allows ANY supercharger that is designed for the 96-99 trucks to fit directly onto this intake, any air intake like Volant or K&N FIPK will fit as well. Plus this intake manifold is a GM piece designed by GM engineers.


peace
PAuly

[stockchevy1983]

would this be able to be used or no

http://cnj.craigslist.org/boa/677265316.html

[Pauly]

I cant tell if its for Vortec heads or not. Vortec intake have 8 bolts in pairs at the corners of the intake, while conventional GEN 1 intakes use 12 bolts.

If its for a vortec it could be converted to MPFI. It would take some fab work.

peace
PAuly

[stockchevy1983]

yea im not looknig to do any fab work, no time and no skills. i jsut want to find sometihng thats mostly bolt on, with very little work if needed

[Pauly]

Originally Posted by stockchevy1983

yea im not looknig to do any fab work, no time and no skills. i jsut want to find sometihng thats mostly bolt on, with very little work if needed

You need this marine intake.
http://www.mercruiserparts.com/Show_... AND+FUEL+RAIL

Unless you are turboing or supercharging, you dont need a different intake manifold. There are easier ways to pick up 10-15 hp.

peace
Pauly

[Blazerguy]

On the TPI manifold, I considered this once. I accidentally had a complete TPI manifold sitting next to my toolbox when a 98 pickup with the L31 came in for an intake gasket. I know the lower intake would have to be changed, but this was a fitment test. I sat the sucker on there, looked awesome. However, the only way the accessory brackets would bolt back up is if the AC compressor was ditched. The throttle body would have literally been a couple of inches into the compressor. Not a slight interference, a major interference. The AC compressor issue was a killer for me on that one. Also, as some have pointed out, the distributor is a wee bit too big as well. I didn't go that far tho, seeing the AC compressor issue made me stop.

[19doug90]

i want to do a tpi swap with the vortec tpi base but ya i had been wondering about that too, wouldnt exactly be a small project to re-do that line and its completly in the way. I think that might stop me from doing that swap,which is a shame

[Blazerguy]

It's not just an AC line you would have to redo....it's that you would have to get rid of the AC compressor. The 96+ accessory drive setup mounts a compressor that is too long, too high up, and too close to the intake to work. One would have to either lose their AC completely or revert back to the accessory drive of the previous trucks.

It's a shame too...as far as I am concerned the TPI and the SuperRam are the best looking intake manifolds ever made for the SBC.

[19doug90]

well the tpi being the best truck intake they ever built imo

be interesting if it would be possible to somehow run a serpentine setup from the third gen's as well and re-locate everything but someone would probably have to fab up all custom brackets for that, doubt theres enough money in it

and ive already dumped 30 grand into a camaro thats not worth anything to sell, i cant justify doing that to a truck so the a/c has to stay

[trailwart]

i never even thought of the ac being an issue. but looking at the truck again it sure would cause issues