ca discussion with friend. help me out plz

[wildacexxx]

so im starting to fall in love with this engine. i was talking to my friend on how it is a great high/fast revving engine blah blah blah. he says then why do they only make 175 hp when the sr makes 205. so i scratched my head for a second and said well maybe its because of the larger t25 and the i/c setup. i told him that i bet if u were to put a sr t25 and a sr ic you can get very close to 205 even if its missin 189cc. am i right? he calls bullshyt on my theory.

[biosehnsucht]

all else being equal, the CA will always make less power. there's no replacement for displacement.

turbo = displacement multiplier; more boost is more displacement, but still, that'd only be fair to compare with doing the same to the other car.

now, on the other hand, you very likely can get a more usable power band from the CA, since it revs further safer and can be less peaky (flatter powerband).

the CA will need more to meet a SR's power, but not much more. throw a catback on a CA and leave a stock exhaust on the SR and you probably would have more or less evened it up right there.

Except for drag racing, generally, a wider, more usable power band is more useful (i.e. not having to up/down shift as much to keep it in the power band).. for drag of course peak power is all. (well, and traction)

[themadscientist]

lower displacement, smaller turbo, less effective intercooler.

[rexhunta]

Nissans suck. buy an Excell.

[NeedCAforS13]

With an sr t25 on stock boost with a 2.75 inch exhaust and upgraded ARC sidemount intercooler I made 178whp which ~ 205hp.

Sean

[float_6969]

I kinda have to agree with Bio on this one. As much as I love the CA, I think simply putting on an SR T25 and an SR intercooler, I don't think you're going to gain 30hp.

[wildacexxx]

well i said close

[boost_boy]

Nissans suck. buy an Excell.

Hey, I drive a boosted Elantra .

Dee

[ArticDragon192]

now, on the other hand, you very likely can get a more usable power band from the CA, since it revs further safer and can be less peaky (flatter powerband).

Really? how's that. Everyone tells me the CA is a peaky motor in comparison to both the KA and SR since it is a smaller motor. If it can have a broad powerband, then that just makes it more enticing to me.

[81na ZX]

Also its an older motor. Back in the day, engines were tuned lighter from the factory. example: S13 vs. S15 SR20DET's. Or for an extreme example: A 1990 Eclipse, auto, is rated at 190hp from a turbo 4G63. Today a Evo MR is close to 300hp for a 4G63. Sure, different turbo and different injectors, but more than that different ECU programming.

[biosehnsucht]

Well at least with everything working as intended

I can put around town under 3k in the lower gears ok but you'll not be winning races there; it's no slug (except under 1k) but let's be realistic, its only 1.8 and not yet on boost (a boost controller would help this, as would me fixing that one leak at the cold start to intake mani hose)

but from ~3k to ~7k it pulls pretty strong yet flatly.. sure with upgrades it would peak more, but as it is while as I'm about to hit redline I'm not making as much power as just abit before it BUT I'm not losing power at such a rate as to feel that I'm slowing down, still being pushed back into the seat (just less so).

and this is stock turbo, but then I do have a host of other goodies (see sig). still need to throw on my RB20 MAF and retune again for that, then hit a dyno. that and I (and most here) still have USDM 4.08 gears, the CA is meant for 4.363 gears which will admittedly narrow the speed to revs range of usablity but the enhanced power output should be worth it, unless you've got a real monster of a car..

but again stock for stock or mod for mod you're not going to get more out of a CA vs SR, as far as #'s go. You could, if upgrading and tuning wisely, be able to get a more useful powerband from a CA than a SR, in part due to the higher redline and ability to survive there repeatedly (and no worries about broken rockers).