4.6 bottom rev limit.

ihatesissycars · Post by **ihatesissycars** » Fri Feb 09, 2007 8:45 pm

Does anyone know how high you can safely rev a 4.6?

v8man · Post by **v8man** » Fri Feb 09, 2007 8:58 pm

got a 4.8 and got no probs up to 7.500

sidecar · Post by **sidecar** » Fri Feb 09, 2007 10:20 pm

ihatesissycars wrote:Does anyone know how high you can safely rev a 4.6?

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!

I take my tuned 3.5 to 6-6.5k, generally the bigger the motor the lower the rev limit will be.

Regards,

Pete

ihatesissycars · Post by **ihatesissycars** » 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.

stevieturbo · Post by **stevieturbo** » 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.

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4.6 bottom rev limit.

4.6 bottom rev limit.

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