Hahn vs. Howell who has better bottom end for 420a

[99 gst 420a dsm]

ok ima be doing the bottom end on my 420a very soon, whats the better priced company for a bottom end kit hahn or howell, and if hahn, which is more wise for around 300 horse @ 15-20 psi: 8.6:1 or 8.8:1 pistons... any coments are apresiated, but please no flaming

 

[siueclipse]

either one will do the trick. but you will need to switch out the cartech fpr for a vortech fpr to achieve that high of boost. the cartech needs to have an afc if you stick with it.. screw that.

 

[99 gst 420a dsm]

im going with a Vortec FMU, 440cc injectors, and a 255lph pump

 

[siueclipse]

i personally don't htink you will need 440cc injectors.

im running 310 on 15lbs of boost with the stock hrc system.. im running too rich once again.

 

[99 gst 420a dsm]

using thunderbird turbocoupe injectors

 

[Kirby]

Use the 440's if you like, but use the SFMu not the FMU. If you get the SFMU you will be able to adjust idle pressure. That car won't idle those big INJ. on the stock regulator. You can go with either company for the bottom end I would buy the cheaper kit which I believe will bw howell.

 

[99 gst 420a dsm]

well actually im not 100% on the cc of the turbo coupe injectors, they are 19psi i think