more stroke

unstable load · Post by **unstable load** » Mon Feb 10, 2014 5:19 am

I think you are setting yourself up for an expensive exercise. From what I have read, getting those sort of figures from a 3,5 is possible, but needs really deep pockets.
Is there any reason you are determined to use a 3,5 and not a 4,6?

Darkspeed · Post by **Darkspeed** » Mon Feb 10, 2014 10:13 am

300BHP is Rover Stage 4 UBV heads, Merlins or The TA's. and to keep the revs at a level not to require forged pistons, steel rods and steel rocker gear /rollers etc. It will have to be over 4.5L.
Induction, exhausts and ignition to suit.

Or forced induction

Big valve RV8 stage 3 heads do not flow enough for (a genuine) 300BHP N/A

Whatever the capacity RV8's are head restricted, so for power that it where your budget starts to be spent to meet your goal.

As a rough guide

Standard valves 240BHP
Big Valves - 280BHP (standard seats)
Ultra Big Valves - 320BHP (new seats)

Blown v8 · Post by **Blown v8** » Mon Feb 10, 2014 1:23 pm

Forced induction would probably be cheaper for your 300 bhp goal,
I've got SDi heads on my 5.0l,not as restrictive as people think with forced induction

futten · Post by **futten** » Mon Feb 10, 2014 2:12 pm

well me and my friend decided to start looking for a 4.9 or possably a tvr engine instead of the 3.5

the reason i first thought about the 3.5 there is a guy selling a some engines so i had that idea but were gonna look into a tvr engine instead something i can rebuild and then hop up and there will be NOOOOOOO forced induction and NOOOO N2O so please stop bringing it up