Team MightyBoy

After a couple of years of neglect i have finally dropped my mb 3 inch and got it running sweet for my daily trips to uni. After driving my honda city turbo 2 for the last couple of years i find it very hard to sit on anything under 105 for my 20 min either way drive to uni. how bad is this? i range from 100 - 110 the whole time and i know it would be reving its nuts off but it surprisingly handles it very well and sometimes creeps to 115 if i'm not paying attention. it had a rebuild approx 20 000 k ago.

so does anyone know what revs i would be doing, what do mb's redline at, how bad is this for my engine and what would everyone recommend as a good speed?

(off topic but i found out yesterday that my car can fit under the boom gates to the new undercover parking at uni. $5 a day saving. so bloody happy)

Regards, Tom

At 110 an F5A will be whizzing away at about 5500RPM. Is that good for the motor? I doubt it. Redline is about 6000-6500RPM.

thanks for that brayden. would you have any idea what they redline at? being a smaller engine would they have a much higher rev capabilty?

Um... 6000-6500RPM.
Brayden said a while back they tend to fly apart somewhere between 7000 and 9000 though.

Lol @ boom gates.

thanks stevan. i think i might bring it down to 100 k then.

Regards, Tom

Yeah in my experience anything above 7000 and pistons start disintegrating.

but really it all boils down to - if you're enjoying it, keep doing it! Engines are made to be thrashed!
Not everyone may be of that opinion though.

shavenyak wrote:but really it all boils down to - if you're enjoying it, keep doing it! Engines are made to be thrashed!
Not everyone may be of that opinion though.

Fair call..
When it finally dies, rebuild it and balance it so it revs to 9k everyday.

When it finally dies, rebuild it and balance it so it revs to 9k everyday

thats what an engine reco bloke said to me and then he did it. haha. he reckons he has got it revving past 11

It's only worth reving that fast if it's making power, otherwise it's wear & tear for nothing!

I love the getting under the boom gates, that's cool!

Cheers

ToranaGuy

My F6AT cappo is quite happy revving to 7,500 all the time so why does the F5 sh*t itself?

Because none of the components in a single cam F5A were designed to take that kind of punishment.

wow they must be high boom gates cause my stock mb is ova 3 inches higher then my mr2 and i havnt found any boom gates i can sneak under.

yeah i was sceptic at first when i went to try it. its on a hill and they haven’t compensated for it. but seriously i thought there was no way in hell that i was going to fit under until i got the tape out one afternoon and it gets under by about 10mm. as for the speed, i have dropped to 100-105 on the highway which gives me piece of mind (sort of). i would keep with the 110 but its my only car atm. i will be doing the 800 conversion in the future so if anyone has a decent frontcut let me know.