Building A 351w For Boost

SlowFiveOh

New Member

Oct 30, 2016

11

0

1

Jun 26, 2017

#1

• Jun 26, 2017

• #1

Hey everyone, fairly new to the site.
Ive recently blown another 302 due to fuel system issues. Now i feel like its time to build a 351w.
My current mods are as listed
-msq pnp II
-electronic boost controller
-55mm bov
-dual mishimoto electric fans
-70mm on3 Turbo
-3" vband exhaust from headers back
-47lb injectors
-msd distributor
-large air/air intercooler
-walbro 255lph fuel pump
-3.73 gears
-Built AOD transmission
-slightly upgraded suspension

I have my hands on a 1989 351w and im looking to build the internals for boost.
What would you all recommend? Lets keep the build under 5000$ . my car is a 1991 mustang gt vert, its a street car mainly . id like to see 500whp out of it roughly.

 

Last edited: Jun 26, 2017

hoopty5.0

mechanicus terribilis

15 Year Member

Dec 14, 2010

7,767

6,932

214

SW Houston

Jun 27, 2017

#2

• Jun 27, 2017

• #2

For 500whp, you don't need to build anything. Keep your tune safe and it will handle it in stock form. Plenty of people making 700+

 

SlowFiveOh

New Member

Oct 30, 2016

11

0

1

Jun 27, 2017

#3

• Jun 27, 2017

• #3

hoopty5.0 said:

For 500whp, you don't need to build anything. Keep your tune safe and it will handle it in stock form. Plenty of people making 700+

Click to expand...

Well it has 180,000kms on the motor. Im slightly worried that i might encounter the same situation that i have with my 302s. I guess after all is said and done and i scrap the van the motors coming in the complete motor only cost me 300$ cdn.

 

hoopty5.0

mechanicus terribilis

15 Year Member

Dec 14, 2010

7,767

6,932

214

SW Houston

Jun 27, 2017

#4

• Jun 27, 2017

• #4

Well, if you're having fueling issues as mentioned above, you're going to torch any motor you put in there, regardless of the "quality" of the build. Fix the fuel first.

 

90sickfox

Wasn't a pretty sight...and I've got big hands

SN Certified Technician

Mar 2, 2015

6,945

5,816

213

Jun 27, 2017

#5

• Jun 27, 2017

• #5

Just curious... How did you screw the 302 up ?

I also run mspnp2 and turbo. Guess fuel pressure dropped causing lean condition.

 

a91what

SendMeUrDataLog

10 Year Member

Apr 6, 2011

10,739

6,720

214

Hillsborough county

Jun 27, 2017

#6

• Jun 27, 2017

• #6

Yup we had his tune dialed in.... he lost the fuel line in the tank from the fuel pump. When tested only had 10psi fuel pressure.

 

Reactions: SlowFiveOh

SlowFiveOh

New Member

Oct 30, 2016

11

0

1

Jun 27, 2017

#7

• Jun 27, 2017

• #7

Yes, fuel issue has been addressed.
Motor #1 - fuel line fell off in tank because some moron hooked it up wrong.
Motor #2 - blew fuel line out the side probably just from defective material.

Both times were during 10psi pulls.

 

SlowFiveOh

New Member

Oct 30, 2016

11

0

1

Jun 28, 2017

#8

• Jun 28, 2017

• #8

Well guys, my question is should i swap in this motor with no machine work or rebuilding and just cross my fingers? Whats the max boost threshold for the stock components? Seeings the motor makes a N/A 220hp back almost 30 years ago id need butt loads of boost to hit my 500hp mark. Maybe a set of junkyard heads and a off the shelf cam? If so what would anyone recommend? Should i throw in a nice set of pistons? Lower the compression? Whats been a proven method to doing this other then by just not caring and boosting the hell out of it? I would like to be able to use the car all summer long . just looking for anyone insight so i can follow or take it into consideration when building my motor. Thankyou anyone who replies.