pi motor question

[Gregor185]

thinkin about doin a full pi motor. but since i dont wanna a sh!t load of power but i do want a decent amount i may wanna freshen this one up. i have a late 01 block sitting in my shed that im gonna use. is there a budget build or anything like that for our cars?ie....cobra rods and pistons or something like that we can do?

 

[BigTang]

cobra rods aren't exactly cheap if you mean 03/04 rods, i wouldn't bother w/ 96-01 rods. besides H beams are heavy and are of little use unless you are running a power adder.

run the NPI pistons w/ the PI heads for more compression, notch the pistons and put a set of real cams in there. I'd do a 99/01 4v swap before I spent money on a stockish 2v at a machine shop. I you were building all out that would be a different story.

 

[Gregor185]

i do have a pi headswap with compcams xe270ah in there now. im thinkin i might plan on throwin some sort of power adder but idk what yet

 

[Mustang46]

IMO, I would just do the swap and add a supercharger down the road. it will give you around 380 rwhp/rwtq mark @ 9-10 psi boost. Thats just what I would do.

 

[Green Hornet]

how big do you want to go? i had my 2V running 9's all day. but it was a lot of work. if you are looking for a more pocketbook friendly way to go, build a 302 stroker, and a supercharger.

 

[Gregor185]

yeah im thinkin around 450rwhp would be nice 500 MAX but like i said i dont wanna break the bank. if thats even possible with those types of numbers. the 01 block i have will have to go to the machine shop since it does have some surface rust on it. thats why i was wondering if it was possible for a budget build or do i have to save my pennies. ive even considered gettin a 302 and building that since theyre cheaper than a 2v...

 

[Green Hornet]

You can do a 302 stroker on the 2v. I was Makn 650 to the rear. But I spent a lot. Cheeply u can do 350-400

 

[Gregor185]

ill have to look into it

 

[reivaxtorres]

the current combo you have (pi swap) is about as cheap as you can. anything else and it starts requiring more money. with a 2v, there really isnt anything thats cheap once you do the usual bolt ons. stock rods/pistons will only handle about 400-450rwhp, and very few survive past the 400 mark, so that means getting forged rods if you plan on building an engine. 96-01 cobras, 03/04 mach 1's, and 96-04 gt's use the same rods, btw, only the 03/04 cobras had the forged rods.

 

[Musturd]

2vs ain't cheap if you could find a saleen blower for the pi motor that would be goodtimes

 

[Gregor185]

i know ive asked this before but is there a diff from the npi block to the pi block besides itll give me higher compression? im only asking because when i get my heads fixed over the winter, if i were to have them pull the block whats the difference for machining that block as opposed to my 01 block and getting a forged kit(pistons and rods and what not)

 

[MadStang]

Cheapest and most lightweight setup you could possibly go for is called the compression buster...

N/A
8-Bolt Windsor Cast Crank (99-00 mustang)
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Boost
8-Bolt Forged Crank (96-04 Cobra / Mach)
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Coyote Rods (yes they bolt right into a modular!)
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N/A
Flat Top Pistons (Mark VIII)
================================

Boost
Don't really have a recommendation, 4v pistons arent really good because the compression would drop crazy low.
================================

 

[duff daddy]

NPI Pistons w/reliefs, PI heads, Cams ...large, 150 shot, Good rods, lightened and knife edged crank, and a decent manifold (P51 will work fine for this) .... DONE and that car will run mid-low 11's with good hook

 

[reivaxtorres]

i know ive asked this before but is there a diff from the npi block to the pi block besides itll give me higher compression? im only asking because when i get my heads fixed over the winter, if i were to have them pull the block whats the difference for machining that block as opposed to my 01 block and getting a forged kit(pistons and rods and what not)

between the blocks themselves? for the most part they are identical. the 96-98 an 01-04 blocks are mostly the same (Romeo blocks), and the 99-00 blocks are the same (Windsor Blocks). differences between the windsor blocks and the romeo blocks are almost unnoticeable unless you actually crack them open, and then you will see slight differences in the main bearing caps. meain bearings are also different between the two, and the oil filter housing gasket is different too.

if you are talking about an assembled Romeo vs an assembled Windsor shortblock, then there are more differences. on the Romeo's, the piston pins are held in with clips, on the Windsors they are pressed in. the dish in the piston is different between the 96-98 and the 99-04 (some people say there is a difference between the 99-01 and the 02-04 piston dish too, but i dont know if thats true or not). the rod caps are slightly different, the cranks are either 6 bolt (romeo) or 8 bolt (windsor)

everything else is pretty much the same, i think the coolant drain plugs are in different locations on the windsor vs romeo blocks. im sure im forgetting something tho.

and for the record, from 92-10 (i think it was 2010....whatever was the last year they had the 4.6), all 4.6L blocks (Teksid, WAP, Windsor, Romeo) use the same engine mounting locations, alternator mounting location, and head mounting locations, so technically, you can swap any of the heads (2v,3v, and 4v) onto any 4.6L or 5.4L block with very little or no modifications needed.