Im thinkin of gettin the 4.7 for the series and im wondering if that would be a good combo for a car with 300-350hp??

Anyone welcome to post

 

I say no. You're going to have plenty of power to turn the wheels into wheelsmoke anyway and I think traction is going to be a SERIOUS issue at 300+ whp. Plus, you're going to kill your highway cruising MPG.

 

yeah if anything, get something lower than stock, for drivablilty

 

yea I would say thats too high for that much power. Your tires will just spin through the first couple of gears.

 

anyone actually using it?

 

cause i always thought longer gears were better to a point.

 

I'm not sure what kinda engine/transmission you are talking about but i think that a 4.7 FD will generally shorten your gears and as other people pointed out it would probably be a bad idea with 300-350whp. I say keep your stock FD, you may wanna tell us what it is first though and what engine/trans you have.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">cause i always thought longer gears were better to a point.</TD></TR></TABLE>

Longer gears are only better for acceleration when you can no longer get traction with the short gears you have. End of story.

 

The motor is a D16Y8 in a 99 civic 4 door im probly going to stay with the stock FD due to the fact that if i change the FD ill be going threw the gears faster and loose traction faster.

Ill be on 205/40ZR 17 Falken FK-451 so i know that if put alot of power on them they will just spin.

 

If longer gears are better for you, you can always go with the D16Y7 tranny.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">I say no. You're going to have plenty of power to turn the wheels into wheelsmoke anyway and I think traction is going to be a SERIOUS issue at 300+ whp. Plus, you're going to kill your highway cruising MPG.</TD></TR></TABLE>

hahaha....where do you get this killing your gas milage!! 4.785 final drive 80 plus mphs for 2500 miles...averaged 32 mph!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">

hahaha....where do you get this killing your gas milage!! 4.785 final drive 80 plus mphs for 2500 miles...averaged 32 mph!!</TD></TR></TABLE>

No joke?? I figured cruising around way up there in the rev range would be hard on it. I still get close to 40mpg in my turbo y7 hatchy, so I dunno. Guess I was wrong...just this once though.

 

What final drive do you have???

I can get 550-625km on a tank boosted

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">

hahaha....where do you get this killing your gas milage!! 4.785 final drive 80 plus mphs for 2500 miles...averaged 32 mph!!</TD></TR></TABLE>

 

reading is FUNDAMENTAL......if you reread it says with a 4.785 cruising at 80 plus i get 32 mpg!!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">What final drive do you have???

I can get 550-625km on a tank boosted

</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">reading is FUNDAMENTAL......if you reread it says with a 4.785 cruising at 80 plus i get 32 mpg!!

</TD></TR></TABLE>

reading is fundamental which is why you should read it again.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">

hahaha....where do you get this killing your gas milage!! 4.785 final drive 80 plus mphs for 2500 miles...averaged 32 mph!!</TD></TR></TABLE>

you said 32mph!! lol. sorry just had to bust ya!! It's all in good fun!

s

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">reading is FUNDAMENTAL......if you reread it says with a 4.785 cruising at 80 plus i get 32 mpg!!

</TD></TR></TABLE>

Yeah, mine was about the same also. But it hurt to rev the motor at 4,500-5,000 RPM on my 400 miles trip!

 

too high

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EVIL_EKology &raquo;</TD></TR><TR><TD CLASS="quote">

Yeah, mine was about the same also. But it hurt to rev the motor at 4,500-5,000 RPM on my 400 miles trip!</TD></TR></TABLE>


HOW THE HELL DOES THAT HURT AN ENGINE??????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">


HOW THE HELL DOES THAT HURT AN ENGINE??????
</TD></TR></TABLE>


more revs = more wear/stress

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">


HOW THE HELL DOES THAT HURT AN ENGINE??????
</TD></TR></TABLE>

:shrugs: I dunno, I figured that keeping the motor at such high revs for such a long period of time (Approx 4 1/2- 5 hrs) wouldn't be too good for the motor's health in general. Am I wrong, Chad?

 

no chad. i believe keepin your car at 5k rpm for 4 to 5 hours is also bad on your motor, make it to hot and to much friction. word, that's it.

 

try my ats tranny 5500 at 70 mph hehe

it should be fine but then again I dont boost but 4500 rpms is not something to put your panties in bunch just keep it oiled and tune it and you should be fine