should i go ahead and spend some money on a p51 intake manifold with the jlt intake hookin up to a vortec s-trim?

.. or should i go with a nice twin screw kenne bell.. i would still need a tb and plenum for the kb setup right? or not?

which would be a more effective + powerful set up?

 

Its the KB that would need the JLT, not the centri. On a centri you still use the t/b and plenum, but the kit replaces your CAI and MAF etc. I do believe the KB still uses the t/b but not the plenum. A KB will see good gains with a CAI (this type of blower is sensitive to inlet restriction)

If you have the cash for a P-51 and the JLT intake you should look into a bottom end though.

Bottom end + Vortech SQ = Ownage.

 

yeah. i have been reading about the p51 its a pretty clean unit heh.. and it especially looks BADASS. but i still dont know. your saying i will need a new bottom end though? how much could this cost? what exact parts would i need for this.

and i would only need a new bottom end after i s/c with the p51 and a centri. or with just a p51 and mods?

 

do whatever you have the money for. The KB is going to be more expensive though.

 

money isnt the factor. im trying to build something ill enjoy to the fullest. because in reality thats all im going to get out of the gt, thats pretty much the end of the road for her. i dont want nos. and i dont want a turbo.

what would the difference between the two set ups be? would the kb loose power to the other set up in the long run or what? how would it work. im not that educated on that part of it..

 

Major dif is that max boost is lower in the rpm's (2200) with a KB. Centri boost is built up throughout the rpm range. Gt4.6 would know more about a KB than me.

 

IF you've got the money get the P51 an Vortech....you'd probably be looking at about 450 horse with that setup...KBs are nice also I'am still trying to decide on a Twin-Screw vs Centi. also.

 

Define Bottom End: are u talking about building a forged engine to support the boost or are u actually talkin about a new short block?

 

i think if you do it right you can get a p51 and a vortech for around the same price of a kb.. and yeah 4.6 what were you meaning about the bottom end?

 

well basically they are one and the same. A forged assembly is pistons/rods/crank, a "short block" just means it comes assembled with (usually) a oil pump, sometimes a oil pan, plus they put it together, which does take some skill to do correctly.

If you can afford it, I have seen some shortblock's for around 2200 bucks or so, in stock displacement form. No matter what setup (blower) you have somewhere between 420 and 440 RWHP you are tapping out on the stock shortblock.

on a stock shortblock the P-51 is kinda overkill frankly, there are other things you can do to max out the shortblock power wise that cost less (cams). You can't exceed about 6,000 RPM on the stock shortblock with the blower, and the P-51 is just starting to really shine at that point.

If you had the shortblock built though (with a stock intake) you can make alot more than 440~ WHP (assuming you have the other supporting boltons, exhaust/intake stuff). MPH has a intercooled Novi 2000 car (2v) with the stock heads and intake manifold putting down 601 WHP (exhaust/intake boltons, cams, power pipe, etc etc)