Building a foundation?

[CrawCobra97]

So for a while now I've been trying to decide what I want to do with my cobra, I have been really thinking about doing a 2.1 KB but the more I think if this where one of you more experienced fellas on here would you recommend building the motor first as in forging the internals, Camming, ect, ect,or should I just go with a KB and be done, and if I want more power later, then forge it and everything else

 

[venom1997]

If u stay stock expect 8 -10psi max about 375 rwhp with methanol if you forge expect 14-15 psi about 450-475 butttt read my post about the kenne bell inlet it's a restriction for the 1.5 and even worse for the 2.1 the inlet flows 500 cfm the 1.5 compressor flows 700 and the 2.1 is 900 so if u want to make power with the know u have to modify the inlet to stop the restriction its not hard to do tho especially if it's off the car I'm hoping for 500 rwhp with the 1.5 with the 2.5 upper stock lower

 

[venom1997]

U don't need to forge unless I want 450+

 

[venom1997]

An unintercooled century will make the same as a non ic kb but the kb will feel way different compared to centri especially in a straight line

 

[venom1997]

Kb pussed out in our kit but if u know how to make things work they make great power hell 500 rwhp out of a 1.5 is nasty

 

[CrawCobra97]

Well my thoughts are, if I forged the internals, raise the compression ratio, cams, port the b heads, go with a Sri, and what not would I not be at around the same power with a KB at 7 psi or so, and also ready for something a lot more after..

 

[venom1997]

Yea easy high comp and boost would make 500+ with a kb I'm running 9.1 comp

 

[venom1997]

I'm going to spray a 75 shot thru the blower to cool it even more and make it a 100+ increase hoping to be the first 96-98 kenne bell over 600 to the tire

 

[venom1997]

I say forge it and kb it water meth

 

[CrawCobra97]

I wish I could but I only have a budget of 5,500 max I believe forging the internals would cost like 1,200 lol

 

[venom1997]

Try n find a used 96-98 kb kit they go for cheap especially 1.5 n1.7 a full rebuild is only 600 bucks and I have proved the 1.5 is plenty enough for 450-500 rwhp 10-12 psi

 

[venom1997]

Mod max h beams and pistons are a good bet the pistons are cp

 

[venom1997]

Cams are really not needed for 1500 bucks u might get 20 hp lol just degree ur stock ones and pick up like 10 more

 

[ZeroDCX]

An unintercooled century will make the same as a non ic kb but the kb will feel way different compared to centri especially in a straight line

A non-intercooled centri will make more peak power than the b-headed non-intercooled KB with less psi. But the KB will make more overall power throughout the powerband, due to instant boost vs building boost with rpm. The centrifugal supercharger's discharge temps are much lower than that of the non-intercooled KB which allows for more timing to be added. At 8-10psi, a non-intercooled centri on a b-head cobra will produce north of 400 rwhp depending on timing, rpm and other tuning factors (without spraying meth). Everyone has their preferences, but if you're really looking to stay with a positive displacement blower then C-heads are your best option. Then you would be able to actually use an intercooler/aftercooler with the PD blower, not to mention the superfluous amount of options you would have for forced induction.

 

[CrawCobra97]

So what you would really suggest is building the motor, with c heads and give it forged internals, then look into giving it forced induction

 

[Tabres]

I wish I could but I only have a budget of 5,500 max I believe forging the internals would cost like 1,200 lol

That's going to be a bare minimum cost on the parts. You're not even considering machining or labor costs.

 

[CrawCobra97]

To start with in only looking for 400rwhp, then I want to try to give the car a diet, to about 3000lbs. But I wouldent be opposed of doing and all motor build, just not sure if I'm mechanically inclined enough to do so.. I'm 21 and do most work out if my garage, I have replaced head gaskets, clutch, just haven't done a lot bottom end work myself

 

[CrawCobra97]

That's really my point, how much, with machine work, gaskets ect would it be too forge it?