4.6 bottom rev limit.
Posted: Fri Feb 09, 2007 8:45 pm
Does anyone know how high you can safely rev a 4.6?
got a 4.8 and got no probs up to 7.500 The V8 Owners Forum -
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4.6 bottom rev limit.
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Posted: Fri Feb 09, 2007 8:58 pm
got a 4.8 and got no probs up to 7.500 Re: 4.6 bottom rev limit.
Posted: Fri Feb 09, 2007 10:20 pm
It depends on whether its standard or not; the standard valve springs will cause valve float way before 7500. The standard cam and ports may not flow enough and the rods won't like it much either!ihatesissycars wrote:Does anyone know how high you can safely rev a 4.6?
I take my tuned 3.5 to 6-6.5k, generally the bigger the motor the lower the rev limit will be.
Regards,
Pete
Posted: Sat Feb 10, 2007 9:00 am
Thanks guys, i should've mentioned it just the bottome end i need to know the limitations of. I have Tvr 5.0 Griff heads (probably too big i know but i'm certainly not going to be limited at the top end though which is what i want!) and ACT induction etc so breathing isn't going to be a problem.
Posted: Sat Feb 10, 2007 10:34 am
When I bought mine, I was told no more than 5500rpm for a standard bottom end.
Mine would have seen 6000rpm often enough though. Altough it never did want to rev more than that anyway.
Mine would have seen 6000rpm often enough though. Altough it never did want to rev more than that anyway.