5.0 Stroker Question

BigEag205 · January 12th, 2011, 02:38 AM

Hello, I have the Eagle 4.9 flat top stroker kit for my 01 Cobra (teksid block). Upon tearing the motor down i found out the previous builder (done by previous owner) slightly over-bored the cylinders and my new builder says ill have to either keep it the same and deal with the little chatter its doing (compression checks fine) or re-sleeve it because as is, the sleeves supposedly wont hold to the boost and nitrous which I'm applying to it. My question is, I believe it would be easier/cheaper to find a replacement teksid block and just have it bored 20 over (to the right specs) and apply the stroker kit to it. do you all have any opinions on this or should i go with another block for this application. Ive read/heard of the teksid blocks holding up to a supposedly 1200hp. Looking forward to the responses

Tang Stang · January 12th, 2011, 09:23 AM

What size overbore are the pistons that you bought? 0.020"? What is your current bore size?

DickH · January 12th, 2011, 01:33 PM

Yeah your best bet is to find a new block, you should be able to find one for a couple 100 bucks.

SWEET2KSTANG · January 12th, 2011, 09:32 PM

these blocks will go +.030 if you were to change pistons

32vFox · January 13th, 2011, 06:04 PM

get a new block.. they go for dirt cheap on corral and what not

BigEag205 · January 13th, 2011, 06:33 PM

The stroke is 3.750". At +.020" bore, with a rod length of 5.950". The compression is 10.8. If it would be safe to do so i could bore it .030 and just order the pistons and rings to match a .030 bore. Im stuck with the ever lasting decision of doing a high comp boost build or low comp with dished pistons.

SWEET2KSTANG · January 13th, 2011, 11:04 PM

compression will only get into the 10's with off the shelf piston. you can boost a decent amount on pump gas. put some race gas in it, and boost as much as you desire.

January 12th, 2011, 02:38 AM	#1
BigEag205 Underground 2001 SVT Cobra Join Date: Sep 2007 Location: West Virginia Posts: 86 iTrader: 0 reviews	5.0 Stroker Question Hello, I have the Eagle 4.9 flat top stroker kit for my 01 Cobra (teksid block). Upon tearing the motor down i found out the previous builder (done by previous owner) slightly over-bored the cylinders and my new builder says ill have to either keep it the same and deal with the little chatter its doing (compression checks fine) or re-sleeve it because as is, the sleeves supposedly wont hold to the boost and nitrous which I'm applying to it. My question is, I believe it would be easier/cheaper to find a replacement teksid block and just have it bored 20 over (to the right specs) and apply the stroker kit to it. do you all have any opinions on this or should i go with another block for this application. Ive read/heard of the teksid blocks holding up to a supposedly 1200hp. Looking forward to the responses

January 12th, 2011, 09:23 AM	#2
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,960 iTrader: 2 reviews	What size overbore are the pistons that you bought? 0.020"? What is your current bore size? __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

January 12th, 2011, 01:33 PM	#3
DickH MM Fanatic 2003 gt 5.4 32v on the way Join Date: May 2007 Location: Omaha Posts: 4,188 iTrader: 2 reviews	Yeah your best bet is to find a new block, you should be able to find one for a couple 100 bucks. __________________ 2003 Mustang gt - usual mods - slowly working on 5.4 swap 2004 srt4 - Stock DD/winter beater Click here for your tuning needs Before asking a gearing related question click THIS link and enjoy all your saved time.

January 12th, 2011, 09:32 PM	#4
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	these blocks will go +.030 if you were to change pistons __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

January 13th, 2011, 11:04 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	compression will only get into the 10's with off the shelf piston. you can boost a decent amount on pump gas. put some race gas in it, and boost as much as you desire. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

January 13th, 2011, 06:04 PM	#5
32vFox Regular Join Date: Jan 2011 Posts: 64 iTrader: 0 reviews	get a new block.. they go for dirt cheap on corral and what not

January 13th, 2011, 06:33 PM	#6
BigEag205 Underground 2001 SVT Cobra Join Date: Sep 2007 Location: West Virginia Posts: 86 iTrader: 0 reviews	The stroke is 3.750". At +.020" bore, with a rod length of 5.950". The compression is 10.8. If it would be safe to do so i could bore it .030 and just order the pistons and rings to match a .030 bore. Im stuck with the ever lasting decision of doing a high comp boost build or low comp with dished pistons.

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