4.10's and FI

nutterbutter · January 23rd, 2008, 08:27 PM

does anyone have 4.10's with a FI car? I know most likely there is not much traction.. but what if a very nice suspension system was on the car.. would it hook up with some 10.5's on the back and some 315's? I have 4.10's im installing next week but I plan on supercharging next fall. I dont want to have to pay the money now to buy 3.73's after I already have brand new 4.10's nor do I want to swap them after a year.

03 R Code · January 23rd, 2008, 08:32 PM

I ran 4.30's when I had nitrous... No issues with that. Sure it's a challenge to get traction, but some slicks will solve those problems, along with some mild suspension upgrades.

TheBusher · January 23rd, 2008, 08:42 PM

You can hook with ther right tires and suspension, but now the problem can become lack of gear. You REALLY don't want to have to make a reach for 5th gear in the 1/4.

Oh wait, do you have a Manual or Auto?

nutterbutter · January 23rd, 2008, 09:23 PM

5 spd. im ordering a sport box or launch box next week so I should have most suspension taken care of. Once I get all my suspension done I'm pulling the motor and putting in forged rods and pistons (thinking my crank will be fine at around 500hp). prob get some headwork p&p / valvejob and a stage 2 cam as well before i buy a blower. my ride has like 74k so I'm trying to get all my supporting mods done before going FI.

nutterbutter · January 23rd, 2008, 09:26 PM

my car rides like a jacked up friggin 4x4 right now with the 18's on it so i can't wait for my suspension to come in. just trying to figure out how much more money i want throw in "the pit"

TheBusher · January 23rd, 2008, 10:34 PM

Originally Posted by nutterbutter

5 spd. im ordering a sport box or launch box next week so I should have most suspension taken care of. Once I get all my suspension done I'm pulling the motor and putting in forged rods and pistons (thinking my crank will be fine at around 500hp). prob get some headwork p&p / valvejob and a stage 2 cam as well before i buy a blower. my ride has like 74k so I'm trying to get all my supporting mods done before going FI.

Your crank is good to more like 600-650 HP

nutterbutter · January 23rd, 2008, 10:53 PM

would getting new valves make a difference? or should I just clean up the old ones. I mean I know they have like oversizes valves and low clearance valves but I really dont know what the benifits are going to be? I'm trying to make the internals efficient as possible before FI.

SWEET2KSTANG · January 24th, 2008, 12:06 AM

4.10's are to steep in my opoinion. i have them and run a 125, i absolutely hate them. some guys here love them, it will be a personal preference thing. aftermarket valves swirl polished and usually are undercut and have a valve job. when doing the bottom end, you will rebalance the rotating assembly. stock crank will chrun out 600 no problem. there are a bunch of factors that will greatly affect what cam will be needed for your set up.

G.T. Rags · January 24th, 2008, 12:53 AM

Originally Posted by FryRice

Don't Fear the Gear

johnr2001 · January 24th, 2008, 07:32 AM

I have 4:10's with FI and its not bad my car is an auto though. I am going through the traps in the 1/4 pretty much at 5800 or so in drive.

nutterbutter · January 24th, 2008, 05:22 PM

Originally Posted by SWEET2KSTANG

aftermarket valves swirl polished and usually are undercut and have a valve job. when doing the bottom end, you will rebalance the rotating assembly.

I thought the act of replacing the valves was a valve job. like replacing the springs and retainers, cleaning it up and all that. so you can have a "v-job" done on valves? or do you have to buy them like that.

what might be an ideal process of modifying the valves, like what are all the parts I should buy i guess I'm asking..

SWEET2KSTANG · January 25th, 2008, 06:29 AM

valve job could be a couple different things. set back to stock settings if needed to be fixed for seating issues. then there is 3 angle, 5 angle, undercut, larger valves, swirl polishing, etc that can be done on valves. most aftermarket valves come with at least a 3 angle and most of the time undercut and swirl finish. some of the aftermarket valves come with a 5 angle, and the older heads come along a lot of other things that can be done as far as performance valves are concerned.

January 23rd, 2008, 08:27 PM	#1
nutterbutter Regular 2002 GT 88mph @ 1.21 jigawatts Join Date: Apr 2007 Location: Austin, TX Posts: 75 iTrader: 0 reviews	4.10's and FI does anyone have 4.10's with a FI car? I know most likely there is not much traction.. but what if a very nice suspension system was on the car.. would it hook up with some 10.5's on the back and some 315's? I have 4.10's im installing next week but I plan on supercharging next fall. I dont want to have to pay the money now to buy 3.73's after I already have brand new 4.10's nor do I want to swap them after a year.

January 23rd, 2008, 08:32 PM	#2
03 R Code MM Fanatic unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 3,103 iTrader: 0 reviews	I ran 4.30's when I had nitrous... No issues with that. Sure it's a challenge to get traction, but some slicks will solve those problems, along with some mild suspension upgrades. __________________ Political correctness is a doctrine fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

January 24th, 2008, 12:06 AM	#8
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,430 iTrader: 8 reviews	4.10's are to steep in my opoinion. i have them and run a 125, i absolutely hate them. some guys here love them, it will be a personal preference thing. aftermarket valves swirl polished and usually are undercut and have a valve job. when doing the bottom end, you will rebalance the rotating assembly. stock crank will chrun out 600 no problem. there are a bunch of factors that will greatly affect what cam will be needed for your set up. __________________ project warhorse under construction being built by MP2 Performance

January 24th, 2008, 07:32 AM	#10
johnr2001 Enthusiast 2001 GT Join Date: Dec 2007 Location: Bivalve MD Posts: 575 iTrader: 1 reviews	I have 4:10's with FI and its not bad my car is an auto though. I am going through the traps in the 1/4 pretty much at 5800 or so in drive. __________________ 03 Mach 1 full eaton swap, 18" chrome bullitts, H&R springs, 5.0 shifter, slp2, mac catted H, FRP 4.10's, 443 RWHP/ 386 TQ

January 25th, 2008, 06:29 AM	#12
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,430 iTrader: 8 reviews	valve job could be a couple different things. set back to stock settings if needed to be fixed for seating issues. then there is 3 angle, 5 angle, undercut, larger valves, swirl polishing, etc that can be done on valves. most aftermarket valves come with at least a 3 angle and most of the time undercut and swirl finish. some of the aftermarket valves come with a 5 angle, and the older heads come along a lot of other things that can be done as far as performance valves are concerned. __________________ project warhorse under construction being built by MP2 Performance

January 23rd, 2008, 09:23 PM	#4
nutterbutter Regular 2002 GT 88mph @ 1.21 jigawatts Join Date: Apr 2007 Location: Austin, TX Posts: 75 iTrader: 0 reviews	5 spd. im ordering a sport box or launch box next week so I should have most suspension taken care of. Once I get all my suspension done I'm pulling the motor and putting in forged rods and pistons (thinking my crank will be fine at around 500hp). prob get some headwork p&p / valvejob and a stage 2 cam as well before i buy a blower. my ride has like 74k so I'm trying to get all my supporting mods done before going FI.

January 23rd, 2008, 09:26 PM	#5
nutterbutter Regular 2002 GT 88mph @ 1.21 jigawatts Join Date: Apr 2007 Location: Austin, TX Posts: 75 iTrader: 0 reviews	my car rides like a jacked up friggin 4x4 right now with the 18's on it so i can't wait for my suspension to come in. just trying to figure out how much more money i want throw in "the pit"

January 23rd, 2008, 10:53 PM	#7
nutterbutter Regular 2002 GT 88mph @ 1.21 jigawatts Join Date: Apr 2007 Location: Austin, TX Posts: 75 iTrader: 0 reviews	would getting new valves make a difference? or should I just clean up the old ones. I mean I know they have like oversizes valves and low clearance valves but I really dont know what the benifits are going to be? I'm trying to make the internals efficient as possible before FI.

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