4:11s on the highway?

Ike83 · Feb 13, 2008

Can anybody (who has 4:11 gears) tell me what rpm I can expect to run at on the highway (say around 60-70 mph) if I do decide to upgrade from my 3:55s?

By the way, I'm running a T5 tranny.

302RollinHard · Feb 13, 2008

I'd say 3K +/-

85_SS_302_Coupe · Feb 13, 2008

First off, 4.11s are a GM gear. Fords have 4.10s.

Second it depends a bit on how tall your tire/rim combo is. On my Ponys with somewhat low profile tire (245/50) i run around 2700rpm at 70mph. Taller tires will help bring your highway RPMs down.

Ike83 · Feb 13, 2008

85_SS_302_Coupe said:
First off, 4.11s are a GM gear. Fords have 4.10s.

That's what I thought....but everybody here in my brokerage firm was telling me that 4:10s were a GM gear and that Ford's were the 4:11s. Sorry about that.....but anway.

Shoot! 3k rpms is NOT that bad with 4:10s. Everybody else opined that 4:10s (4:11s) would put me at around 4k rpms on the highway. I didn't think it would wind me up THAT high....but, in any event, thanks for clearing that up for me.

Ike83 · Feb 13, 2008

Are 3:73s also a GM gear?

85_SS_302_Coupe · Feb 13, 2008

I don't know if i'd call it a "GM" gear but i think they also have 3.73s.

Wallzy · Feb 13, 2008

To go up or down in gear and figure out your RPM in gear:

(Current RPM) X (New Gear) / (Old Gear) = New RPM

For instance: 2100 x 4.10/3.55 = 2425 rpm

Walz

85_SS_302_Coupe · Feb 13, 2008

Wallzy said:
To go up or down in gear and figure out your RPM in gear:

(Current RPM) X (New Gear) / (Old Gear) = New RPM

For instance: 2100 x 4.10/3.55 = 2425 rpm

Walz

Damn i should've paid attention in math instead of feeling up my gf in the back of the class

Ike83 · Feb 13, 2008

Wallzy said:
To go up or down in gear and figure out your RPM in gear:

(Current RPM) X (New Gear) / (Old Gear) = New RPM

For instance: 2100 x 4.10/3.55 = 2425 rpm

Walz

Thanks guy.

talladam · Feb 13, 2008

I run about 2350 at 65 with 4.10's/t5/254-50-16 tires.

Adam

Fast63 · Feb 13, 2008

should be approximately 2500 at 65, depending on tire size. The factory tire size should put you somewhere around that rpm.

jhonda · Feb 14, 2008

First off you can put a 4.11 gear in a 8.8 without any problem
Second here is a website with a rpm calculator
http://www.allfordmustangs.com/Detailed/608.shtml

SVT32VDOHC · Feb 14, 2008

80MPH is should be at 3K with 4.10's and a 5spd.

Ike83 · Feb 14, 2008

talladam said:
I run about 2350 at 65 with 4.10's/t5/254-50-16 tires.

Adam

Wow...that's not bad at all.

4:11s on the highway?

Ike83

Member

302RollinHard

New Member

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

Ike83

Member

Ike83

Member

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

Wallzy

New Member

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

Ike83

Member

talladam

Member

Fast63

New Member

jhonda

Member

SVT32VDOHC

waiting for the next hack atta

Ike83

Member

Similar threads

4:11s on the highway?

Member

New Member

it sucks (I know) to be on the receiving end

Member

Member

it sucks (I know) to be on the receiving end

New Member

it sucks (I know) to be on the receiving end

Member

Member

New Member

Member

waiting for the next hack atta

Member

Similar threads

Privacy & Transparency

Privacy & Transparency