So, brand new 2.9 engine, forced induction options?

[robertc1024]

I can still get you that cam and lifter set. It's the most aggressive cam you can run in a 2.9 without swapping to MAF.

+1, If you're planning on something like that, not going to MAF would be crazy - and it's not that expensive.

 

[heptofite]

eh, MAF is a joke, there's nothing maf can do that MAP can't, even on forced induction.


fact of the matter is, if i have a good tune i only need the TPS and nothing else.

but beyond that, MAF is a bandaid solution to the problem of poor tuning, i've seen plenty of MAP based forced induction systems.

 

[lethal-threat-b288]

I can still get you that cam and lifter set. It's the most aggressive cam you can run in a 2.9 without swapping to MAF.

+2 id like that too

 

[colby450xc]

You COULD, but it would be pointless to mate an M90 to a 2.3 as 2.3 turbo manifolds are a dime a dozen.

I also would not boost a crate 2.9. If you wanted a supercharged 2.9, you would have needed to decide that BEFORE buying a motor. I would have gotten my hands on a good block, and called up Morana, then started from there. Since you already bought the motor - I'd buy a cam, springs, and read up here in the tech library about modding 2.9s. Just go with a mild build.

What he said!

 

[Psychopete]

eh, MAF is a joke, there's nothing maf can do that MAP can't, even on forced induction.


fact of the matter is, if i have a good tune i only need the TPS and nothing else.

but beyond that, MAF is a bandaid solution to the problem of poor tuning, i've seen plenty of MAP based forced induction systems.

 

[gribly]

If you have an in-house dyno and are capable of tuning your own stuff, there isn't anything wrong with speed density. Lots of high-dollar race-cars use it, but they run a different tune every day. It is not as practical for a backyard mechanic, but can be done just fine as long as you know what you are doing - and you can have a simpler intake setup.

 

[pontiacfieroguy]

i gots a question. why would you buy a brand new 2.9 when you know how easy and cheap a 4.0 is for our trucks?

 

[heptofite]

i gots a question. why would you buy a brand new 2.9 when you know how easy and cheap a 4.0 is for our trucks?

because a used 4.0 cost as much as a new 2.9 and i'd rather not use a junkyard engine.

 

[heptofite]

actually let me clarify:

if i got a 4.0, i'd need a new computer, new wiring harness, convert the dash to work with the new computer, and a new transmission.


or, i could just get an engine that plugs straight in and be done with it, and have a not-used engine to boot.

 

[ozziemo27]

because a used 4.0 cost as much as a new 2.9 and i'd rather not use a junkyard engine.

A new 2.9 costs a few hundred bucks? Shoot!

 

[heptofite]

A new 2.9 costs a few hundred bucks? Shoot!

by the time i'm done changing everything around to make a 4.0 fit and not break stuff, i'd spend more than 'a few hundred bucks'

 

[59bisquik]

Your best bet would be an aftermarket standalone like Megasquirt. It will allow you to tune it and would accept a wideband MAP or if you so choose, a MAF. It will also let you run a crank fired ignition instead of a distributor. Megasquirt is a good deal if you cant afford the higher dollar stand alone units and is adaptable to pretty much any engine build.

I know its not a 2.9, but I run a 2.0L turbo Subaru in my dune buggy. It runs a standalone ECU with a MAP and pushes 15psi of boost. A MAP can be used, but your computer will have to accept a wideband reading.

 

[ozziemo27]

by the time i'm done changing everything around to make a 4.0 fit and not break stuff, i'd spend more than 'a few hundred bucks'

Well I figure you are spending more than a few hundred on a new 2.9?

 

[straycat]

I'll be doing it the supercharged way, since i've got a friend with an M90.

that said, what do i need to do on a zero mile motor to get it ready for a supercharger?

i'm not going to be running massive boost, just something to pep it up a little bit.

shooting for at least 220hp.

is that attainable? will it break the engine?

Why not put in a newer 4.0 motor? Close to the same hp. That is just a lot of money to put in a BII and to have issues later on, plus...it is a lot of work to pipe all the plumbing correctly. Now...if it a true bolt on item and no running extra this and that and it only takes a short time to install it that would be nice....but that never really happens. Everybody I know who has put on a blower or turbo has always had some stupid annoying issue that drove them crazy and then they were never happy with it!! If you take it to a shop that can do it....that would be the best idea. The shop can correct and adjust any issues with the set up as they go along with the install!!!

 

[heptofite]

Well I figure you are spending more than a few hundred on a new 2.9?

about 1250 for the engine.

i'd spend more than that converting everything to play nice with the 4.0, because i refuse to do anything half assed or take shortcuts.

if the 4.0 swap doesn't look factory, it's not getting done, basically.