Building a 4.6 for boost

Reloaded · March 20th, 2009, 04:38 PM

So my stock bottom end took a dump on me a two weeks ago today. Not completely sure the root cause of the failure, but earlier this week I did find a nice hole in the valley of the block. (I'll take pics and post soon.) I have spent the last couple of weeks getting money together and trying to figure out wtf I want to go with. Here is what I have so far: '99 Cobra teksid block that's been bored .20 over and is ready for a new rotating assy. I'm going to use my stock Mach 1 heads on this block, along with keeping the Eaton. Has anyone here done a stroker kit on one of these blocks or read about someone that has? I have been thinking about getting a stroker rotating assy, but am not completely sure that it would really help me out. If not, then I may use my stock crank and just put some forged rods/pistons in. Looking for between an 8.5 and 8.9 compression ratio. Any advice as to what might be good to go with would be appreciated.

SWEET2KSTANG · March 20th, 2009, 04:44 PM

i would personally just go back with a 4.6 instead of the stroker. i would do a little massaging on the heads, reuse stock crank (especially if its forged), get a 15cc or so dished piston, h-beam rods of your choice, have a machine shop prep assembly, and you will be set.

99blkcobra · March 20th, 2009, 04:46 PM

dont forget the oil pump

Reloaded · March 20th, 2009, 04:48 PM

Originally Posted by 99blkcobra

dont forget the oil pump

new pump or the billet gears?

Oh and I have ABOUT $ 1600-1700 to spend on a rotating assy. I am going to pull the motor this weekend and should know sure by next week if my stock forged crank is usable. Either way, I think I might prefer to get a rotating assy. if I can afford it and sell off the stock crank if it is good just so I can get this going.

Thanks for the advice so far. Is there a reason behind forgetting the storker? Pointless? No power gain? Unreliable? Thanks.

Oh also, I'm not looking to make 800 hp. In the end, I'd like to port/pulley the Eaton down the road and make 470-500 to the wheels.

SWEET2KSTANG · March 20th, 2009, 04:49 PM

either. billet gears are for hardcore set ups or for those that are just worried about failure. a lot of guys just go with 03/04 cobra oil pumps.

Reloaded · March 20th, 2009, 04:52 PM

Originally Posted by SWEET2KSTANG

either. billet gears are for hardcore set ups or for those that are just worried about failure. a lot of guys just go with 03/04 cobra oil pumps.

I just checked the Ford parts catalog. The oil pump out of a Mach 1/'99-01 Cobra/03-04 Cobra are all the same part number.

SWEET2KSTANG · March 20th, 2009, 04:52 PM

we installed the mmr oil pump in doc's car, i will probably do the same in my car this summer/fall.

2002BLGT · March 20th, 2009, 04:55 PM

pull it apart and see whats actually broke , buy just what you need and check companys like Modmax , MMR , DSS for the best deals on what you wanna put in it , I lost 2 pistons in my GT over a year ago and reused the stock crank and put H beam MMR rods and Manley pistons in for little over 1000 .......upgraded to ARP hardware while I did that as well ....put 03-04 cobra oil pump and pickup in it for cheap upgrade

Reloaded · March 20th, 2009, 05:06 PM

Originally Posted by SWEET2KSTANG

we installed the mmr oil pump in doc's car, i will probably do the same in my car this summer/fall.

Ok cool, just checked their webiste. Looks like I'll pick one of these up along with my internals. Thanks for the heads up!

Reloaded · March 20th, 2009, 05:08 PM

Originally Posted by 2002BLGT

pull it apart and see whats actually broke , buy just what you need and check companys like Modmax , MMR , DSS for the best deals on what you wanna put in it , I lost 2 pistons in my GT over a year ago and reused the stock crank and put H beam MMR rods and Manley pistons in for little over 1000 .......upgraded to ARP hardware while I did that as well ....put 03-04 cobra oil pump and pickup in it for cheap upgrade

Sounds good. Yeah I'm going to pick up the MMR oil pump it looks like.

BTW, I'll be contacting you for a new tune pretty soon here.

futureMACH1racer · March 20th, 2009, 05:46 PM

I also installed the MMR billet pump in my car as well.

wraitherx · March 21st, 2009, 10:50 PM

Originally Posted by futureMACH1racer

I also installed the MMR billet pump in my car as well.

same here. when i did the rebuild i didnt want to skimp out on anything.

March 20th, 2009, 04:44 PM	#2
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	i would personally just go back with a 4.6 instead of the stroker. i would do a little massaging on the heads, reuse stock crank (especially if its forged), get a 15cc or so dished piston, h-beam rods of your choice, have a machine shop prep assembly, and you will be set. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

March 20th, 2009, 04:46 PM	#3
99blkcobra Hardcore Enthusiast 1999 cobra Join Date: Sep 2007 Location: Las Vegas Posts: 1,741 iTrader: 2 reviews	dont forget the oil pump __________________ 1999 Mustang Cobra (rebuilding, someday...) 1996 civic dd [/SIZE] MM Cobra Club #3

March 20th, 2009, 04:49 PM	#5
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	either. billet gears are for hardcore set ups or for those that are just worried about failure. a lot of guys just go with 03/04 cobra oil pumps. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

March 20th, 2009, 04:52 PM	#7
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	we installed the mmr oil pump in doc's car, i will probably do the same in my car this summer/fall. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

March 20th, 2009, 05:46 PM	#11
futureMACH1racer I.D.G.A.F. 2009 John Deere 9670 Join Date: Sep 2007 Location: United States of America Posts: 11,346 iTrader: 0 reviews	I also installed the MMR billet pump in my car as well. __________________ RIP Travis Bilings 5/6/1982-7/5/2011 Be polite. Be professional. But have a plan to kill everyone you meet.

March 20th, 2009, 04:55 PM	#8
2002BLGT Banned Join Date: Jun 2007 Location: Bedford VA Posts: 837 iTrader: 0 reviews	pull it apart and see whats actually broke , buy just what you need and check companys like Modmax , MMR , DSS for the best deals on what you wanna put in it , I lost 2 pistons in my GT over a year ago and reused the stock crank and put H beam MMR rods and Manley pistons in for little over 1000 .......upgraded to ARP hardware while I did that as well ....put 03-04 cobra oil pump and pickup in it for cheap upgrade

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