TIM Z
DMAX Power
Havent seen that, very nice!
Thanks for the pic.
Thanks for the pic.
TBI with Multiport?
- Thread starter genesis
- Start date
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Scroll down to post 118, thats what I'm talkin about. It doesnt get any cleaner than that.
http://www.fullsizechevy.com/forums...market-spider-mpfi-conversion-manifold-6.html
The benefit of this manifold is everything stays in the stock location, so, you can keep your K&Nfipk or any other CAI and any SCer made for a Vortec 5.7 would bolt right up to it wih no mods. Another bonus, you keep all emissions provisions.
Here's the picture from FSC.
That looks great, but to make it really work well, you also need new heads. I always use AFR. The heads will cost $1500 to $2000. I would not want to invest in all of this without rebuilding the engine.
I am assuming there is some wiring to do for hooking up the new injectors?
Cartwright
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I would do the basic performance mods and some gears.
As I understand it, Genesis, was not looking to sink a lot of money into this project. He inquired about some gain in power to help with towing. Also the truck has 220k on the clock, so that should be kept in mind when making mod’s.
For those that are considering multi-port injection, you need to establish how much money you want to spend ahead of the project.
If you are Normally Aspirated, you must stay focused on the entire package. Any restriction in the air path will hinder the power. That means from air filter to the exhaust pipe. IT ALSO INCLUDES EVERYTHING IN BETWEEN. Like throttle body size, intake path, valve size, cam lift, exhaust valve size, head design, exhaust manifold, catalytic converter, muffler, tail pipe.
It is a combination of all of the elements that make engines efficient. It is also expensive to do it right.
The Vortech heads are pretty good heads to start with. They are mostly responsible for the jump in HP from 1995 to 1996. If you have money to spend, I like AFR heads. ( Air Flow Research). But, they are not going to make much difference without changing the intake, air doors, injectors, etc. You also get to the edge of what the OBD-2 can deal with.
It all comes down to how much money you want to “sink” into your truck. If you are depending on your truck for a daily driver, you might consider just keeping it stock and spending any extra money on making it more dependable.
I have pissed away over $60K just on the drive train of my 95. But, it is my hobby. I will never sell it and it will last me forever. Just 49 ,000 on the odometer so far.
From what I have heard, the performance tune’s can add about 25 to 35 hp, compared to the stock program. That’s about $10 per hp, but keep in mind, that is just going from a conservative factory tune to a “on the edge” tune. Everything was already there to make that power.
From there it will probably cost a lot more per hp. I have paid about $85 per hp so far. Just something to think about. So if you have a good job and income and you are not afraid of the economy being in the tank, grab your checkbook and have at it.
For those that want big power, might I suggest starting with forced, induction. It could save a lot of money in the long run.
For those that are considering multi-port injection, you need to establish how much money you want to spend ahead of the project.
If you are Normally Aspirated, you must stay focused on the entire package. Any restriction in the air path will hinder the power. That means from air filter to the exhaust pipe. IT ALSO INCLUDES EVERYTHING IN BETWEEN. Like throttle body size, intake path, valve size, cam lift, exhaust valve size, head design, exhaust manifold, catalytic converter, muffler, tail pipe.
It is a combination of all of the elements that make engines efficient. It is also expensive to do it right.
The Vortech heads are pretty good heads to start with. They are mostly responsible for the jump in HP from 1995 to 1996. If you have money to spend, I like AFR heads. ( Air Flow Research). But, they are not going to make much difference without changing the intake, air doors, injectors, etc. You also get to the edge of what the OBD-2 can deal with.
It all comes down to how much money you want to “sink” into your truck. If you are depending on your truck for a daily driver, you might consider just keeping it stock and spending any extra money on making it more dependable.
I have pissed away over $60K just on the drive train of my 95. But, it is my hobby. I will never sell it and it will last me forever. Just 49 ,000 on the odometer so far.
From what I have heard, the performance tune’s can add about 25 to 35 hp, compared to the stock program. That’s about $10 per hp, but keep in mind, that is just going from a conservative factory tune to a “on the edge” tune. Everything was already there to make that power.
From there it will probably cost a lot more per hp. I have paid about $85 per hp so far. Just something to think about. So if you have a good job and income and you are not afraid of the economy being in the tank, grab your checkbook and have at it.
For those that want big power, might I suggest starting with forced, induction. It could save a lot of money in the long run.
Hey all, I appreciate the input. Alot if this is things I know as I am a diesel mechanic by profession, but when it comes that the actual tuning, I am still a newbie.
I was refering to doing a TBI onto a stock vortec intake, but switching to multiport isnt a bad idea either. I do like what theyve done with the engien in the pics, but as I had pointed out earlier, this engine does have 220k on it. I havent done much to it yet due to the fact that it is old and I dont need a high out put motor. on the contrary though my tuck is in perfect condition. a little above the windshiel rust but thats it. So depending on when this engine, or the tranny for that matter decides to take a dump. I will probably rebuild into something with a lilttle more power. for now it is just the conservative hp gain like CAI, exhaust, tune, port and polished heads would be nice as well. I was just wondering if anyone had tried adding the TBI on the stock manifold for the added mean of fuel delivery, especially the guys who have done forced induction.
I asked this especially cause in the next week or so I need to take the heads of to replace the valve guides to due burning oil and I also have the notorious lower intake manifold leak as my coolant is making its way into the oil. And I figured while I was at it, maybe something could be don with the fuel delivery system.
As you all have pointed out, it will not be as easy as I was hoping.
One question I do have is I average about 11-12 mpg combined which to me seems rather low. while I have this all torn apart, I was considering replacing the injectors as Im sure with 220K on them they could be dribbling or sticking and thus be a big portion of the reason as to why my milage is down. are stock injectors good enough for future power gains or would you recommend something a little bigger. remember, the purpose of the injectors is to try and get back to the 15-16mpg I feel I should be seeing.
I was refering to doing a TBI onto a stock vortec intake, but switching to multiport isnt a bad idea either. I do like what theyve done with the engien in the pics, but as I had pointed out earlier, this engine does have 220k on it. I havent done much to it yet due to the fact that it is old and I dont need a high out put motor. on the contrary though my tuck is in perfect condition. a little above the windshiel rust but thats it. So depending on when this engine, or the tranny for that matter decides to take a dump. I will probably rebuild into something with a lilttle more power. for now it is just the conservative hp gain like CAI, exhaust, tune, port and polished heads would be nice as well. I was just wondering if anyone had tried adding the TBI on the stock manifold for the added mean of fuel delivery, especially the guys who have done forced induction.
I asked this especially cause in the next week or so I need to take the heads of to replace the valve guides to due burning oil and I also have the notorious lower intake manifold leak as my coolant is making its way into the oil. And I figured while I was at it, maybe something could be don with the fuel delivery system.
As you all have pointed out, it will not be as easy as I was hoping.
One question I do have is I average about 11-12 mpg combined which to me seems rather low. while I have this all torn apart, I was considering replacing the injectors as Im sure with 220K on them they could be dribbling or sticking and thus be a big portion of the reason as to why my milage is down. are stock injectors good enough for future power gains or would you recommend something a little bigger. remember, the purpose of the injectors is to try and get back to the 15-16mpg I feel I should be seeing.
