420A 420a safe at 7300rpm?

[DrewmHolland]

I'm honestly just wondering who all has experience with their 420a at the rev limiter and is it safe with stock internals because 7300 seems ambitious

 

[1990TSIAWDTALON]

If the bottom end were balanced at a shop and had ARP rod bolts I would give it a go if I had the supporting modifications to run the motor to that extent. (But I build motors so I know who would have to fix it if it went south)

 

[DrewmHolland]

So you would say the rod bolts are the weakest link then

If the bottom end were balanced at a shop and had ARP rod bolts I would give it a go if I had the supporting modifications to run the motor to that extent. (But I build motors so I know who would have to fix it if it went south)

 

[1990TSIAWDTALON]

I would. I am not sure on the strength of the connecting rods or crank but would think they would do ok with a proper TUNE.
@BLACK'98DSM , do you have any info that will be helpful to this thread? You are good with the 420 motors.

 

[Canadian_CD9A]

The factory wouldn’t allow it to rev to 7,200 if they didn’t feel it was safe to do so. I’ve seen stock bottom ends spun past 8,000 without the ARPs (though I would advise them if you are going to be rough on it). The stock limiter is totally fine.

 

[BLACK'98DSM]

I rode on the stock rev limiter (and held it there) for multiple weeks before getting rid of my stock engine. It still ran as if I never abused it at all.