I'm sure some of you have done this before so I figured I'd ask and see what your opinions are.
I currently have a pump gas 489 I built about 4 years ago when my budget was really tight and just couldn't justify swinging the Aftermarket big bore block. However the desire for more performance has been eating at me every since and I regret not buying the big bore block back then when I was buying all the other parts when it would have been the easiest and most economical to build a 555/565.
As I see it right now I could use my crank and rods and some of the other parts like intake, pan starter etc.
However besides the block and pistons I assume I'll need new +.300" tall lifters.
My heads are AFR 305s with the cnc chamber option and some additional clean up work. The question is should I have these cut for 2.30" or 2.35" intake valves and have additional porting done or is that not really feasible and should I just add a new set of heads to the build price list?
The goal was to still stay pump gas, spin around 7500-7600rpm max but have peak power around 6800-7000. I hope to make at least 850hp and would really hope to make closer to 900hp.
I have to wonder at this point would I be better off selling my 489 and building the new bigger bore version from scratch or can I use enough parts from my current build to make it more financially feasible to use what I can from it?
Any comments from guys who have done this?
Thanks in advance.
I currently have a pump gas 489 I built about 4 years ago when my budget was really tight and just couldn't justify swinging the Aftermarket big bore block. However the desire for more performance has been eating at me every since and I regret not buying the big bore block back then when I was buying all the other parts when it would have been the easiest and most economical to build a 555/565.
As I see it right now I could use my crank and rods and some of the other parts like intake, pan starter etc.
However besides the block and pistons I assume I'll need new +.300" tall lifters.
My heads are AFR 305s with the cnc chamber option and some additional clean up work. The question is should I have these cut for 2.30" or 2.35" intake valves and have additional porting done or is that not really feasible and should I just add a new set of heads to the build price list?
The goal was to still stay pump gas, spin around 7500-7600rpm max but have peak power around 6800-7000. I hope to make at least 850hp and would really hope to make closer to 900hp.
I have to wonder at this point would I be better off selling my 489 and building the new bigger bore version from scratch or can I use enough parts from my current build to make it more financially feasible to use what I can from it?
Any comments from guys who have done this?
Thanks in advance.
489 to 555/565, use existing parts or start from scratch?
Aucun commentaire:
Enregistrer un commentaire