97 5.7 Intake Question

[atenisplyr]

What is entailed in installing this intake?

http://store.summitracing.com/egnsearch.asp?N=400065+307622+115&autoview=sku

Will this work since I am MPFI?

[BewstAdd1ct]

Dual-plane Performer Vortec intake manifolds are based on Edelbrock's very popular Performer series. They're intended for small block Chevy engines fitted with either 1996 and later cast iron Vortec heads, or Edelbrock's E-Tec aluminum heads. Performer Vortecs are great for street rods, engine swaps, or industrial applications. They're set up for either square-bore or spread-bore carburetors, and produce power from idle to 5,500 rpm. They have no provision for an exhaust-heated choke.

not if you wanna keep the MPFI...

[atenisplyr]

So basically my only option is a marine setup?

I plan on getting ETec-170s and a 268 XFI from Comp Cams. Those mods are a little down the road.

The manifold is cracked pretty badly at the thermostat housing. It's not very reparable.

Any ideas for a manifold?

[TigerEyz3]

If you're wanting to upgrade from the stock vortec intake manifold, you'll have to go with the marine intake. However, that swap will require quite a few changes and many $$$$ (search for "marine intake" and you'll come across quite a few threads). Don't know if the outlay would be worthwhile - depends on what you plan to do with the truck.

[stockchevy1983]

edelbrock has an intake callled the performer rpm or something like that, made for the vortec motor, wouldnt that be a lil bit better then stock?

[atenisplyr]

Doesn't that go from 5000-8000 RPM? Doesn't that seem a little over the top for since the rev limit is around 5800?

[TigerEyz3]

That is still a carbed setup...

[stockchevy1983]

this is the one im talking about http://www.amazon.com/Edelbrock-7516-Air-Gap-Vortec-Manifold/dp/B00062ZTZS

[gmcguy1953]

If you look under the 'Product Features' the second bullet point states 'For Square Bore CARBURETORS'

[atenisplyr]

This seriously pisses me off.

Is MPFI really that much better than TBI? Seems to me like a 4 barrel would be a nice setup too.

[stockchevy1983]

thats ****ing gay, there aint **** for these trucks

[Aloicious]

thats ****ing gay, there aint **** for these trucks

yeah we get screwed on alot of stuff....technically our trucks are CSFI, not true MPFI, but thats just a technicallity...

there aren't any straightforward 'out of the box' aftermarket MPFI intake swaps. there are options though. the marine intake is probably the most popular, there's also the ramjet 350 intake which can be modified to work, or you could take any carb intake for vortec heads, and modify it to work as a MPFI. each of them require some extent of fabrication and modification to work with our trucks. the Marine is probably the best option as it is relitilvely cheap compared to the others (when you factor in modifications to car setups, they can get pricy), it is extensively documented how to get it all to work as you want it to, see here:
http://www.pacificp.com/forum/viewtopic.php?t=317&postdays=0&postorder=asc&start=0
plus there is alot of support from others who have done the swap, and people willing to help. but one downside to the marine is it's weight, which some folks aren't fond of, and others don't mind, its a cast iron manifold so it weighs a bit. but if you're not hardcore into drag racing where every pound counts, you probably shouldn't worry, its benefits outweigh its downsides significantly.

as far as TBI vs. MPFI, the MPFI does have its benefits, and I'm sure there are others out there to argue that X is better than Y. and everyone has thier opinions, mine is that I like MPFI best because I have much more control over the fuel system at each cylinder with tuning than I would with TBI or carbs. the following was taken from Wikipedia, which has a fairly decent explaination of it.

"A multipoint fuel injection system generally delivers a more accurate and equal mass of fuel to each cylinder than can a carburetor, thus improving the cylinder-to-cylinder distribution. Exhaust emissions are cleaner because the more precise and accurate fuel metering reduces the concentration of toxic combustion byproducts leaving the engine...Fuel injection generally increases engine fuel efficiency. With the improved cylinder-to-cylinder fuel distribution, less fuel is needed for the same power output. When cylinder-to-cylinder distribution is less than ideal, as is always the case to some degree with a carburetor or throttle body fuel injection, some cylinders receive excess fuel as a side effect of ensuring that all cylinders receive sufficient fuel. Power output is asymmetrical with respect to air/fuel ratio; burning extra fuel in the rich cylinders does not reduce power nearly as quickly as burning too little fuel in the lean cylinders. However, rich-running cylinders are undesirable from the standpoint of exhaust emissions, fuel efficiency, engine wear, and engine oil contamination. Deviations from perfect air/fuel distribution, however subtle, affect the emissions, by not letting the combustion events be at the chemically ideal (stoichiometric) air/fuel ratio. Grosser distribution problems eventually begin to reduce efficiency, and the grossest distribution issues finally affect power. Increasingly poorer air/fuel distribution affects emissions, efficiency, and power, in that order. By optimizing the homogeneity of cylinder-to-cylinder mixture distribution, all the cylinders approach their maximum power potential and the engine's overall power output improves."

I think wiki did a decent job of summing it up....I would only add that althouh running rich is bad for emissions and fuel efficency, to a certain degree, running somewhat rich is good for power output, and both aspects can be achieved and tuned for to get the best of both worlds in a good MPFI system (i.e. PE mode, lean cruise, MAP vs RPM commanded fuel table, and others etc..)

and now I'm sure there'll be more people to shout their opinion that carbs rule, or TBI trumps everything, bla bla bla bla bla... :nopity:

[Aloicious]

What is entailed in installing this intake?

http://store.summitracing.com/egnsearch.asp?N=400065+307622+115&autoview=sku

Will this work since I am MPFI?

you COULD make that work as a MPFI, but with the mods and extra parts, and fabrication, that $170 price tag would be more like $1000-$1500 when all is said and done.

[atenisplyr]

I think someone should manufacture the marine setup.

I know I would pay for it.

Thanks for your input.

[atenisplyr]

My lower manifold is cracked and leaking coolant. I picked this up off Ebay.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=120230592008&_trksid=p2759.l1259

What do you think will be the best way to clean this thing up?

[Aloicious]

My lower manifold is cracked and leaking coolant. I picked this up off Ebay.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=120230592008&_trksid=p2759.l1259

What do you think will be the best way to clean this thing up?

Carb cleaner and a rag....if you really wanted to you could probably take the lower intake to a machine shop and have it hot tanked, but the upper is plastic.

[BewstAdd1ct]

I think someone should manufacture the marine setup.

I know I would pay for it.

Thanks for your input.


i would too. absolutely. if they made a IM for a vortec head, that would accomodate 8 low priced injectors at the ports, externally, they would sell a bunch. in fact, i bet if we got 20 people saying that theyd sign up for it, i bet we could get edelbrock to make it. theyve already got the CAD/CNC/whatever files for the vortec setup, as well as several MPFI manifolds. shouldnt cost much at all, really.

all we'd need at that point to make it REALLY user friendly is a wiring adapter that goes from the CSFI connector to 8 injectors.

if they set it up to use existing fuel rails (like maybe LT1/TPI or something) we could all go to the camaro graveyard and get cheap rail/injectors. or use production/aftermarket stuff. id bet the entire conversion could be done for right around $500ish.

[atenisplyr]

Nice, we should hit up Edelbrock. Maybe we could get them to do a power package with E-Tec 170s. That would be sweet. Dude, let's do it. How should we go about rounding everyone up to approach Edelbrock?

I bet Summit would do it too.

[stockchevy1983]

**** id go for that deal, im sick of researching and looking for a damn intake lol

[BewstAdd1ct]

Nice, we should hit up Edelbrock. Maybe we could get them to do a power package with E-Tec 170s. That would be sweet. Dude, let's do it. How should we go about rounding everyone up to approach Edelbrock?

I bet Summit would do it too.

we'd need to start a poll thread, have it stickied to get a feel for the level of interest. if its very positive, which im sure it will be, we contact edelbrock and ask them how many orders they need to make an initial production. we then go from there. normally its about 20 people, but seeing how they already have the data they need, it may be less.

[atenisplyr]

Ok, cool. Let's get that thread started.

[BewstAdd1ct]

thread is here

http://www.fullsizechevy.com/forums/general-discussion/performance/315077-gauging-interest-aftermarket-spider-mpfi-conversion-manifold.html