3.73 to 4.10

slowgreen99 · 06-29-2008, 12:41 PM

Just in case anyone cared about cruise speeds and RPMs, I changed from 3.73's to 4.10's. The "RPM per speed" change was....

3.73 gear
70 MPH/2400
80 MPH/2750ish

4.10 gear
70 MPH/dead on 2500
80 MPH/dead on 3000

This was using a DiabloSport Predator on both applications.
BTW, 4.10's FTW!

slowgreen99 · 06-29-2008, 12:41 PM

O yeah, this is on my '99 GT with a T45 tranny

wade w · 06-29-2008, 05:42 PM

Iwanna know if it helped. I'm betting it didnt.

LXtasy · 06-29-2008, 08:38 PM

OH yea. 4.10's now we are talking.

crumbie · 06-29-2008, 09:24 PM

4.10s or nothing in a mod motor

SlowBlk4dr · 06-29-2008, 11:51 PM

Going from 3.55's to 4.10's in RoadPig made alot of difference...shoulda been built that way ... 55 mph is 2000 rpm on a modular 4.6L 32 valve ... Junior ... give a SOTP input from your drive of it because I am too use to it now ...

slowgreen99 · 06-30-2008, 12:31 AM

Quote:

Originally Posted by wade w

Iwanna know if it helped. I'm betting it didnt.

Please explain your point in responding to my post

Mike · 06-30-2008, 12:35 AM

uhmmm...... he thinks your car is slow, and you made it slower by swapping to 4.10's.

Don't worry Brandon, thats what we at bc2 racing do all the time...... make cars slower. hehehe

slowgreen99 · 06-30-2008, 12:43 AM

yep, it got slower, thats for sure. Maybe one day ill have a lightning and a chevelle or whatever it is. I dont think I did too bad to run a procharged gt, me on motor, from a roll for fun and stay out front

jmd · 06-30-2008, 08:34 AM

Quote:

Originally Posted by slowgreen99

yep, it got slower, thats for sure. Maybe one day ill have a lightning and a chevelle or whatever it is. I dont think I did too bad to run a procharged gt, me on motor, from a roll for fun and stay out front

nice. you are a procharger killer. i saw the video. remind me to avoid you.

slowgreen99 · 06-30-2008, 10:54 AM

Quote:

Originally Posted by jmd

nice. you are a procharger killer. i saw the video. remind me to avoid you.

Ill have to shoot the GTO tho...

Whaler · 06-30-2008, 02:58 PM

Quote:

Originally Posted by slowgreen99

Ill have to shoot the GTO tho...

Naa, don't worry about it. It's just another slow ls1.

LXtasy · 06-30-2008, 05:26 PM

Quote:

Originally Posted by SlowBlk4dr

Going from 3.55's to 4.10's in RoadPig made alot of difference...shoulda been built that way ... 55 mph is 2000 rpm on a modular 4.6L 32 valve ... Junior ... give a SOTP input from your drive of it because I am too use to it now ...

Big f-ing difference in that land yacht. Wakes it up. I remember when my dad went from 3.27-4.10 WOW. Fox woke up a tiny bit from 2.73 - 3.55

jmd · 06-30-2008, 06:21 PM

Quote:

Originally Posted by Whaler

Naa, don't worry about it. It's just another slow ls1.

lol. hey man you been busy with life. hope to see catch up with you soon.

wade w · 07-01-2008, 12:12 AM

Quote:

Originally Posted by slowgreen99

Please explain your point in responding to my post

Sorry if that came out wrong. Just wondering. Was thinking about 5.0 when I put that up. I knew some guys that have done that with a 5.0 car and it didnt help it. Forget about the 4.6 being more top end happy.

WWhittle · 07-01-2008, 09:12 AM

Quote:

Originally Posted by wade w

Sorry if that came out wrong. Just wondering. Was thinking about 5.0 when I put that up. I knew some guys that have done that with a 5.0 car and it didnt help it. Forget about the 4.6 being more top end happy.

Really? I know of a 92 Stang that went from 3:73's to 4:10's and picked up 3-4 tenths, no other changes made. Then went from 4:10's to 4:30's and picked up nothing.

slowgreen99 · 07-01-2008, 01:23 PM

Quote:

Originally Posted by streetsweeper

Really? I know of a 92 Stang that went from 3:73's to 4:10's and picked up 3-4 tenths, no other changes made. Then went from 4:10's to 4:30's and picked up nothing.

So far on the street my car is now like night and day. I love the 4.10, just not the RPM sacrifice, but itll be ok. Im hopin I can break into the mid 8's now!

crumbie · 07-01-2008, 01:58 PM

Quote:

Originally Posted by wade w

Sorry if that came out wrong. Just wondering. Was thinking about 5.0 when I put that up. I knew some guys that have done that with a 5.0 car and it didnt help it. Forget about the 4.6 being more top end happy.

LOL. your post is completely wrong. only 4.6 that's more "top end" happy than a 5.0L car is a 4 valve motor.

throw sticky tires on a 3.73 car vs. a 4.10 car and 4.10 car wins every time.

slowgreen99 · 07-01-2008, 02:06 PM

Quote:

Originally Posted by crumbie

LOL. your post is completely wrong. only 4.6 that's more "top end" happy than a 5.0L car is a 4 valve motor.

throw sticky tires on a 3.73 car vs. a 4.10 car and 4.10 car wins every time.

Thats the plan!

crumbie · 07-01-2008, 02:13 PM

Quote:

Originally Posted by slowgreen99

Thats the plan!

I see a tow truck in your future. LOL.

06-29-2008, 12:41 PM	#1
slowgreen99 Senior Member Join Date: Jan 2008 Location: Summerville Posts: 7,740	3.73 to 4.10 Just in case anyone cared about cruise speeds and RPMs, I changed from 3.73's to 4.10's. The "RPM per speed" change was.... 3.73 gear 70 MPH/2400 80 MPH/2750ish 4.10 gear 70 MPH/dead on 2500 80 MPH/dead on 3000 This was using a DiabloSport Predator on both applications. BTW, 4.10's FTW!

06-29-2008, 12:41 PM	#2
slowgreen99 Senior Member Join Date: Jan 2008 Location: Summerville Posts: 7,740	O yeah, this is on my '99 GT with a T45 tranny __________________ M.R.E. Bad Bob Motorsports

06-29-2008, 08:38 PM	#4
LXtasy Senior Member Join Date: Dec 2006 Location: Summerville, SC Posts: 9,564	OH yea. 4.10's now we are talking. __________________

06-29-2008, 09:24 PM	#5
crumbie Senior Member Join Date: Jun 2008 Posts: 322	4.10s or nothing in a mod motor __________________

06-30-2008, 12:43 AM	#9
slowgreen99 Senior Member Join Date: Jan 2008 Location: Summerville Posts: 7,740	yep, it got slower, thats for sure. Maybe one day ill have a lightning and a chevelle or whatever it is. I dont think I did too bad to run a procharged gt, me on motor, from a roll for fun and stay out front __________________ M.R.E. Bad Bob Motorsports

06-29-2008, 05:42 PM	#3
wade w Senior Member Join Date: Aug 2007 Location: Savannah GA Posts: 1,725	Iwanna know if it helped. I'm betting it didnt.

06-29-2008, 11:51 PM	#6
SlowBlk4dr Senior Member Join Date: Oct 2007 Location: SUMMERVILLE,SC Posts: 206	Going from 3.55's to 4.10's in RoadPig made alot of difference...shoulda been built that way ... 55 mph is 2000 rpm on a modular 4.6L 32 valve ... Junior ... give a SOTP input from your drive of it because I am too use to it now ...

06-30-2008, 12:35 AM	#8
Mike Senior Member Join Date: Dec 2006 Location: Goose Creek, SC Posts: 5,481	uhmmm...... he thinks your car is slow, and you made it slower by swapping to 4.10's. Don't worry Brandon, thats what we at bc2 racing do all the time...... make cars slower. hehehe