Vortech with P51 VS KB

[bcun10t]

Still not Sure But was thinking of geting A P51 and VT S/C over KB what are the advantages or disadvatages on a 2v stock motor? Does anyone already have this set up and what are your recomendations?

 

[BennyBlown2v]

To the best of my limited knowlege... An non-intercooled Vortech (V2) will make more PEAK horsepower than a non-intercooled KB. Personally, I'm going with a Vortech non-IC setup and will slowly upgrade the intake components (throttle body/manifold) as I want more power. From where I'm coming from, the Mongoose kit from MPH comes with more than the KB non-IC kit, and for the horsepower gains is more cost effective.

 

[DBMSTNG]

honestly, for the price of the Vortech + the P51, you're close to getting an intercooled KB. i'd go with the KB.

 

[bcun10t]

True, But I am looking for is max power, If I decide to go with the VT I am going to do it I am going the whole way buy purchasing innercooler and all. Trying to get the most power before I do anything to the motor, When the otor goes gives a good exuce to buy another or rebuild.

 

[Blue70]

It depends on what you use the car for...

Street car KB
Race Car Vortec.

Check out the Dyno graph's below
The Purple car has a KB
The Red car has a Vortec

You can see that under 4250RPMs the KB kills the Vortech,
but above 4250RPMs the Vortech rules..

on the street the Vortec will feel REAL weak compared to the KB
(how often do you drive around at 4500RPM's)

You will also notice how flat the torque curve is on the KB while the Vortech is peaky

If the KB can get out of the hole it will leave on the Vortech but the Vortech should real it back in on the topend

View attachment 485597
View attachment 485598

 

[ADRENLN]

the only thin those dyno graphs are good for is to see where the different blowers boost kicks in.

the kb and the vortec are not being run at the same boost. the vortech is making 100rwhp over the kb so the boost on that car is way up.

also the vortec car is built to have high amounts of boost, it is being boosted hard up to 7000 rpm. i realize it is a cobra but there is also a zo6 on there and it is not being reved that high.

with that being said. i would really like the 2.2 kb but i think it is too expensive and i have to mod too many things. so i think im going with the intercooled novi2000 with the p51. im sure ill have plenty hp for the street.

 

[1fast03pony]

the only thin those dyno graphs are good for is to see where the different blowers boost kicks in.

the kb and the vortec are not being run at the same boost. the vortech is making 100rwhp over the kb so the boost on that car is way up.

also the vortec car is built to have high amounts of boost, it is being boosted hard up to 7000 rpm. i realize it is a cobra but there is also a zo6 on there and it is not being reved that high.

with that being said. i would really like the 2.2 kb but i think it is too expensive and i have to mod too many things. so i think im going with the intercooled novi2000 with the p51. im sure ill have plenty hp for the street.

plus unlike the 1.7 kb youll have more room to run higher boost with the Novi2000... 2.2KB of course can also, but its gonna cost you

good choice, keep us posted

 

[Blue70]

the only thin those dyno graphs are good for is to see where the different blowers boost kicks in.

That was exactly my point, the curves, not the numbers

My friend puts down over 100HP than me with his SC (Paxton I think)
but my car feels a LOT stronger around town..

Like I said, if it's a daily driver like mine is I would say KB
if you are looking to just race it, go with the Vortec.

I don't see why in a daily driver you would spend all that money and not feel it.
I don't know anyone that drives around over 4000 RPMs

 

[hognutz]

I am just getting the kene bell 9psi kit. you can read many thread about how this kit can make 600hp and all that but you don't see 600hp in many sigs.

Be relistic with the money you spend. other things need attention too if you make too much power. tranny, rear end, engine internals, etc.

like IMO buying the p-51 over forged intrernals would be a bad choice. spend the $1299 towards a shortblock.

 

[bcun10t]

I still have 10 months of Iraq to make uo my mind. I am already thinking of replacing the rear end (keeping 4:10 gears), clutch, suspension(stage 3 Steeda) and upgrade on the brakes(big 13in) at the same time. Its all about the money though. Trying to keep a budget around ten grand maybe a little more. I just got to have the power though!

I am also looking more at driving aound town and some racing but I will have another vehicle for daily driver. I want something that can throw you back in your seat and ya not able to get back up again. My friend has a Cobra with a VT that was just mad. Going down the highway and down shifting still making the tires soin wild and now I got to get mine.

 

[1fast03pony]

I am just getting the kene bell 9psi kit. you can read many thread about how this kit can make 600hp and all that but you don't see 600hp in many sigs.

Be relistic with the money you spend. other things need attention too if you make too much power. tranny, rear end, engine internals, etc.

like IMO buying the p-51 over forged intrernals would be a bad choice. spend the $1299 towards a shortblock.

Look at spreadmans sig, hes making 500 with a centri...
All I really hear about the 1.7 is the disappointments when the people are seeing 425 hp and they were expecting 460-470...
Saw a few installed at a local shop a few weeks ago and the guys were pissed.
Not sure why, but I wouldnt feel like finding out.
I mean, ****, 425 is nothing to sneeze at but if youre looking for serious peak numbers the 1.7 isnt the way to go

 

[02LaserRed2V]

Peak #s are overrated to a certain extent IMO. Sure, someone with a 400hp Vortech setup in their forum sig may seem more impressive than my 380. But for a kick@ss street setup, I'll still take mine over that. The KB 1.7L was designed for the stock motor/internals, though. So it will be hard to get it over 450whp, though it's been done. But it does start to lose its efficiency after 12 PSI, from what I've seen.

Again, we all know centris have greater peak hp potential. But as mentioned earlier, the majority never reach that.

 

[Will Smith]

Still not Sure But was thinking of geting A P51 and VT S/C over KB what are the advantages or disadvatages on a 2v stock motor? Does anyone already have this set up and what are your recomendations?

it all depends on what your final goals are. if u just want a modest 6-14 lbs of boost a centrifugal style blower like procharger or vortech would be better. now if u really want to get some boost up there the twin screw KB will shine starting at roughly between 12 and 14 lbs and higher.

 

[ADRENLN]

no hes right def. get forged internals first. then figure out your set up.

im kind of forced to go novi2000 not that i think its bad. if i had all the money in the world it would be my second choice. first woulf 2.2 kb. again that is just not reasonable. it will be way too mych trouble and the price is just a little too much.

1.7 is fine on a stock gt but it will be too small for me. mine is a street car but i do want to run like 14psi. i would need a 16 17 maybe 18 psi pully to get 14 out of it because of my heads and cams. the 1.7 just isnt made to go up that high so i figure the novi is the way to go.

i would love the down low tq of the kb but it not for my set up.

you friend runs 100 hp more then you and his car is no faster then you? damn you make me consider the 2.2.

 

[ADRENLN]

blue is you car the purple one on the graph?

you really got me thinking because the vortech car is making near 500 hp

my goal is 430-470 rwhp for this car. thing is i have to figure the dyno lower for my at that power, which means that the kb will even kick my ass more.

crap! maybe i have to get the 2.2. that thing seems like it would be so hard on the engine, even a built block....i dont know.

 

[Blue70]

No, none of the cars in the chart are mine

 

[bcun10t]

To rebuild theengine to exept added HP. Dont you need to cahnge the oil pump, pistons, rings, and what else