nickmilloy

What is the n/a 4.6l dohc block capable of. I mean rpms wise, 7800? more? Of course it would have to be built but is it done that anyone knows of, besides a strip only car? Does any custom shops know of it?
thanks nick

Machmax777

i read somewhere (i think mm&ff) where there were some guys launching at 11,000 with a stock 03-04 cobra bottom end. im sure there was tons of $$$ in those things though.i wish i had a link but it was in a magizine and im sure someones gonna throw the BS flag on me [8D].

OzzDOA

Its not so much the block as much as the rotating assembley and valve train. With the right work I've read about 4v's revving to 10k+.

ponysnake99

jesel makes products to increase rpms with their followers and lash adjusters. I read somewhere that the weak point is in the lash adjusters and one racing team filled the adjusters to stiffen them, but cant find it now. i know panoz and elan use modular engines and that's gt/f series racing, im sure their revving the crap out of them.

JJ03MustangGT

its not so much the bottom end, its more on the cam! if your cam quits making power at 8k why rev to 8.5k? you need better springs for sure though, if your wanting rev higher

35thAnni99GT

^^^ exactly what he said. No extra power to be had, andin fact you'll lose itso there's no point.