car in the shop...Should i do the bottom end? - 2003-04 Mach 1 Registry Owners Club

97on22s · 07-07-2007, 01:40 PM

dropped the car off at the shop. so they can do the heads cam lower intake long tubes etc. he said there gonna go ahead and yank the motor anyway that i may as well just do the pistons rods bearsings seals rings etc.

is there any gains to be made from doing a larger bore? and does it cost much more for that?

What do you guys think

im going to spray the car like crazy hoping for 10.0s

BlueDevil04 · 07-07-2007, 02:15 PM

that all up to you, the price will be a good bit higher than just doing the topend. but in the long run it will be cheaper to go ahead and do it while they have the motor out, that is if you trust them.

97on22s · 07-07-2007, 02:29 PM

they gave me a price of doing forged pistons rods seals bearings etc.

would it be much more for them to have the machine shop do it for 302 size pistons?

rjw158 · 07-07-2007, 02:55 PM

While it's out and apart, you might want to check into replacing the powdered metal oil pump gears with some billet gears just as a little insurance to protect your investment against pump failure running higher rpm/horsepower.
rjw

Scott McClure · 07-07-2007, 03:02 PM

I am in the same boat as you. I thought I would be doing a stroker this Winter but it seems like from what I read a lot of the 03-04 Cobra guys aren't seeing that much of a gain. Plus if its not done right your going to have a serious problem.

rcodemach1 · 07-07-2007, 05:27 PM

I wouldn't bother personally with the big bore or stroking, just don't see the value, unless you are going for bragging rights and money is not part of the equation. Definately forge up the bottom tho.

whoffman · 07-07-2007, 05:33 PM

Quote:

Originally Posted by 97on22s

they gave me a price of doing forged pistons rods seals bearings etc.

would it be much more for them to have the machine shop do it for 302 size pistons?

Do you mind me asking how much your paying for this? I wanna start saving to do the same.

97on22s · 07-07-2007, 07:14 PM

M1M ha....that whole deal is a big mess...but not for my thread.

well the shops gonna do it and do .030 over for no extra charge...what kinda difference will that make or is that just standard when doing the motor?

Pm on cost its a shop here in town really good pricing but dont want to put the prices up

bullitt3350 · 07-07-2007, 11:26 PM

i would do .20 over if i was you...

dontmockthemach · 07-08-2007, 01:25 AM

Our blocks service limit is .030, so going to it wouldn't be nearly as safe as a .020 bore. Again, some added insurance for the block

97on22s · 07-08-2007, 09:50 AM

what is the displacemnt of .020 over and of .030 over?

im gonna try and spray around 200-250 on the motor. if itl hold that much. really want to run low 10s in this thing for the money.

Marks04DSG · 07-08-2007, 09:49 PM

If you have a good shop I wouldn't sweat havin it stroked, If you're staying N/A you gotta do something to make up for the extra weight of the forged internals or you'll just have a safe motor that's got less power than before unless you go for p&p on the heads & intake with cams etc. (H'mmmm),

I want it all got to have it all

sspp · 07-09-2007, 12:49 AM

I prefer to do the bottom end as the top end talks too much...

truetemper · 07-11-2007, 04:08 PM

I'm still new to the 4V Mod motor, but in my opinion, if they pulled the motor out already I would bore and stroke it with forged internals. I had a DSS 5.0 stroker with 18CC pistons in my 00 F-150 with 14# boost and no issues(which is going in my mach soon)

. As far as its performance over a stock bottom end, I did notice a huge low end torque difference but never got to dyno it due to a drunk driver totaling it for me.

But again, Thats my opinion.

sspp · 07-12-2007, 11:21 AM

Quote:

Originally Posted by Mach1Marauder

No dummy! That's how you SHUT UP the top end!

Ahh...I forgot the proverbial 10 minutes of silence.

07-07-2007, 01:40 PM	#1
97on22s Registered User Join Date: Mar 2007 Location: spring tx Posts: 622	car in the shop...Should i do the bottom end? dropped the car off at the shop. so they can do the heads cam lower intake long tubes etc. he said there gonna go ahead and yank the motor anyway that i may as well just do the pistons rods bearsings seals rings etc. is there any gains to be made from doing a larger bore? and does it cost much more for that? What do you guys think im going to spray the car like crazy hoping for 10.0s __________________ 2004 TR Mach 1

07-07-2007, 02:15 PM	#2
BlueDevil04 Are all Machs this Fast?? Join Date: May 2004 Location: Concord, N.C. Posts: 617	Re: car in the shop...Should i do the bottom end? that all up to you, the price will be a good bit higher than just doing the topend. but in the long run it will be cheaper to go ahead and do it while they have the motor out, that is if you trust them. __________________ Mods: blown motor mod!!! 660 rwhp and 565 rwhp with 17lbs of boost. (sold)

07-07-2007, 02:29 PM	#3
97on22s Registered User Join Date: Mar 2007 Location: spring tx Posts: 622	Re: car in the shop...Should i do the bottom end? they gave me a price of doing forged pistons rods seals bearings etc. would it be much more for them to have the machine shop do it for 302 size pistons? __________________ 2004 TR Mach 1

07-07-2007, 02:55 PM	#4
rjw158 Registered User Join Date: Aug 2002 Location: Southeast Michigan Posts: 671	Re: car in the shop...Should i do the bottom end? While it's out and apart, you might want to check into replacing the powdered metal oil pump gears with some billet gears just as a little insurance to protect your investment against pump failure running higher rpm/horsepower. rjw

07-07-2007, 03:02 PM	#5
Scott McClure Mach1 member Join Date: Aug 2003 Location: East Haven, CT Posts: 3,349	Re: car in the shop...Should i do the bottom end? I am in the same boat as you. I thought I would be doing a stroker this Winter but it seems like from what I read a lot of the 03-04 Cobra guys aren't seeing that much of a gain. Plus if its not done right your going to have a serious problem. __________________ 2011 Mustang GT Grabber Blue Automatic 2003 Mach 1 Whipple 2.3 718 rwhp 735 rwtq @25 psi SOLD

07-07-2007, 05:27 PM	#6
rcodemach1 Registered User Join Date: Jan 2004 Location: san diego, ca Posts: 1,461	Re: car in the shop...Should i do the bottom end? I wouldn't bother personally with the big bore or stroking, just don't see the value, unless you are going for bragging rights and money is not part of the equation. Definately forge up the bottom tho. __________________ '03 Mach, Oxford White, 5-spd, Eaton '03 Mach, Black, automatic (parting out) '98 GT, 410w, C4, Vortech

07-07-2007, 07:14 PM	#8
97on22s Registered User Join Date: Mar 2007 Location: spring tx Posts: 622	Re: car in the shop...Should i do the bottom end? M1M ha....that whole deal is a big mess...but not for my thread. well the shops gonna do it and do .030 over for no extra charge...what kinda difference will that make or is that just standard when doing the motor? Pm on cost its a shop here in town really good pricing but dont want to put the prices up __________________ 2004 TR Mach 1

07-07-2007, 11:26 PM	#9
bullitt3350 Registered User Join Date: Jun 2006 Location: houston tx Posts: 136	Re: car in the shop...Should i do the bottom end? i would do .20 over if i was you...

07-08-2007, 01:25 AM	#10
dontmockthemach Black Pearl Join Date: Oct 2006 Location: Okinawa, Japan Posts: 765	Re: car in the shop...Should i do the bottom end? Our blocks service limit is .030, so going to it wouldn't be nearly as safe as a .020 bore. Again, some added insurance for the block __________________ *Procharged Black 03*

07-08-2007, 09:50 AM	#11
97on22s Registered User Join Date: Mar 2007 Location: spring tx Posts: 622	Re: car in the shop...Should i do the bottom end? what is the displacemnt of .020 over and of .030 over? im gonna try and spray around 200-250 on the motor. if itl hold that much. really want to run low 10s in this thing for the money. __________________ 2004 TR Mach 1

07-08-2007, 09:49 PM	#12
Marks04DSG DSG forme Join Date: Aug 2005 Location: Woodbridge, Va Posts: 1,817	Re: car in the shop...Should i do the bottom end? If you have a good shop I wouldn't sweat havin it stroked, If you're staying N/A you gotta do something to make up for the extra weight of the forged internals or you'll just have a safe motor that's got less power than before unless you go for p&p on the heads & intake with cams etc. (H'mmmm), I want it all got to have it all __________________ 2004 DSG Auto Mach1-TRADED IN FOR 06 auto GT - C&L racer intake/VMP tune, imco pro axelback with more to come

07-09-2007, 12:49 AM	#13
sspp Registered User Join Date: Jun 2004 Location: Upland, CA Posts: 387	Re: car in the shop...Should i do the bottom end? I prefer to do the bottom end as the top end talks too much... __________________ I found Jesus. He's in my trunk. You can see him for five dollars.

07-11-2007, 04:08 PM	#14
truetemper Bleedin' Blue Join Date: Jun 2007 Location: Kingsland, GA Posts: 16	Re: car in the shop...Should i do the bottom end? I'm still new to the 4V Mod motor, but in my opinion, if they pulled the motor out already I would bore and stroke it with forged internals. I had a DSS 5.0 stroker with 18CC pistons in my 00 F-150 with 14# boost and no issues(which is going in my mach soon). As far as its performance over a stock bottom end, I did notice a huge low end torque difference but never got to dyno it due to a drunk driver totaling it for me. But again, Thats my opinion.

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