[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
HP at which a 4k is too low gearing?
Steve, durability issues aside, I say that the 4k is appropriate for *any*
level of normally aspirated horsepower. Consider your desired compromise
between acceleration versus top speed. Also use the available amount of
traction to guide you through your selection of gear ratios. If you've got
175 horses at the wheels and you've got the traction to stick the torque
that the 4k's lower gearing can supply... well, go for it! If, however, your
tires just turn into smoke, then use a wider ratio box (or one that has the
same ratios but a taller ring & pinion).
I'm building the same exact motor that you've doing (plus 100 shot of
nitrous). I chose a 4k and then went wild with a 4.25 ring & pinion, a
wide-ratio 2nd gear, a .75 6th gear, and a Quaife. The final drive ratio is
about what a standard 4k will deliver. However, my gears are perfectly
spaced for intense backroad driving.
In short, consider what you want to end up with and then work backwards. If
you need more help in picking gears, I'll be happy to work with you.
Rocc on!
--
Scott F. Williams
NJ Scirocco nut
'99 Subaru Impreza 2.5 RS
Mazda 323 GTX turbo "assaulted" vehicle
Golf GTI 16v "rollycar"
ClubVAC: "Roads found. Drivers wanted."
Check out our rally team's website!
http://www.usrallyteam.com
> -----Original Message-----
> From: scirocco-l-admin@scirocco.org
> [mailto:scirocco-l-admin@scirocco.org]On Behalf Of
> jester@westfailure.net
> Sent: Sunday, February 17, 2002 9:51 AM
> To: scirocco-l@scirocco.org
> Subject: HP at which a 4k is too low gearing?
>
>
> hi all,
>
> I am thinking of swapping out my AGB for a 4k.
>
> At what horsepower rating does the 4k become too low of gearing?
>
> 150 WHP? 175 WHP? 200 WHP?
>
> I am staying NA but have big plans & hope to have 150-170 WHP by the end
> of this year. can you say "built 9a with Jenvey?" I thought that you
> could. I have the 9a, programmable EFI (in the mail next week) cams, head
> studs, to buy: valve springs, arp rod bolts, balancing & a whole mess of
> other stuff.
>
> thanks,
>
> Steve
>
> ******************************************************************
> *********
> Fashion Twins, activate! form of: a lemming.
> http://westfailure.org
> ******************************************************************
> *********
>
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l