H/C/I Question, Should I Touch the Bottom End?

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#1

• Jun 27, 2005

• #1

I'm gathering parts for my H/C/I soon. So far i've got P heads, and an explorer intake. I'm going to get all the supporting mods to go with them. But my father seems to think i should get the bottom end rebuilt with new rings, because he thinks they'll blow right out with the added HP. I know that guys on here are running stock blocks with boost (JR) and no problems.

My car burns about 1 qt. of oil every 3k miles. It runs great, i've never done a compression test, but maybe if i did a compression test and it came up fine, i wouldnt worry, if it didnt, then i might think about rebuilding the bottom end.

So should i do a compression test, or just not worry about it, and do the H/C/I?

Thanks,
Matt

 

CManT1914

New Member

Feb 5, 2004

3,172

2

0

Killeen, Texas

Jun 27, 2005

#2

• Jun 27, 2005

• #2

Matt, I wouldn't mess with it. It's a LOT of work. I too come up with a low oil light once I get right around 3k miles, which usually means 1 qt. low. I'm not messing with mine when I do the swap. I figured I would wait until I blow out the rings then do a 347 stroker kit. Good luck man.
-Chris

 

S

Steve-Os95GT

New Member

Jun 21, 2005

33

0

0

Jun 27, 2005

#3

• Jun 27, 2005

• #3

It all depends on how warn down your block is. I have 130,000 on my stock bottem end with plenty of mods on top. I have NO problems. You said you use up 1 qt every 3 thousand miles. You make the call. These blocks last a long time. I recommend driving it until it blows up, then replace it. What is the difference between replacing now, it runs fine, and replacing when it blows up? Driving it until it blows up gives you more time to save up $ for other mods when you finally have to tear it down and rebuild. My .02.


95GT Stock 302 bottem end. P. Products Typhoon upper/lower intake, MAC shorty headers, Cam, Underdrive pullies, MAC CAI, 1.7 roller rockers, Lifters, Edelbrock Performer RPM heads (out the box), Diablo Sport tune, 70mm TB. 3:73s, Subframe connectors, Lowering Springs, Caster camber kit, 18" Saleen rims w/ Nitto Extremes.
294rwhp 327rwtq

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#4

• Jun 27, 2005

• #4

steve o, i forgot to mention that i have 135,000 miles on it. I dont think i should, cause i know the blocks are strong. Shoul di do a compression test to check it out?

 

W

wytstang

Mustang Master

Mar 14, 2004

4,988

4

78

Summerville,SC missing South Fl. weather :(

Jun 27, 2005

#5

• Jun 27, 2005

• #5

If it aint broke don't fix it.

 

W

wytstang

Mustang Master

Mar 14, 2004

4,988

4

78

Summerville,SC missing South Fl. weather :(

Jun 27, 2005

#6

• Jun 27, 2005

• #6

Sure do a CT it's always good to know what's going on.

 

S

Steve-Os95GT

New Member

Jun 21, 2005

33

0

0

Jun 27, 2005

#7

• Jun 27, 2005

• #7

Definately do a test. Like wy said, "good to know what is going on." It will hold up, though. Keep the fluids changed with the synthetic at least every other oil change and run 93 octane regardless of what other people may say, IMO.

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#8

• Jun 27, 2005

• #8

well...can i buy a compression tester at autozone or something? I'll do that and go from there. thanks steve

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Jun 27, 2005

#9

• Jun 27, 2005

• #9

I know you don't wanna here it but.......

Better listen to dear ole Dad.

1 quart every 3k miles and 135K on the clock will not stand up very long with 300 to the wheels. Those rings are tired.

Later
Grady

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#10

• Jun 27, 2005

• #10

thats what i'm afraid of grady. my next question is how much for a bottom end rebuild

 

9

96darkhorse

Founding Member

Oct 2, 2001

693

0

16

wilmington, california

Jun 27, 2005

#11

• Jun 27, 2005

• #11

if you do plan on changing something out of your bottom let it be the pistons....you can get some trickfllows for cheap or any other good brand....thats what i would do.....theres no point in changing anything else if there isnt anything broken.....i see most guys with 140k- 200k with built top ends with blowers...theres alot of good examples of high mileage stangs...you make the call

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#12

• Jun 27, 2005

• #12

so new pistons and rings and **** will do the job?

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Jun 27, 2005

#13

• Jun 27, 2005

• #13

matthiasj said:

thats what i'm afraid of grady. my next question is how much for a bottom end rebuild

Click to expand...

Now you see the frustrating part about this hobby

Decisions..........Decisions..........Decisions

If I was gonna think about a short block rebuild................................

I'd consider a b&bed 306 short block.

The other guys have a good point also.

Gather up and use the parts for a nice combo and when the motor is just too tired to go any longer, all of the go fast parts will work with the new short block as long as you don't go for a 347 stroker ...... that is.

Later
Grady

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#14

• Jun 27, 2005

• #14

well a 306 has been on my mind, but i didnt know if the heads could feed it. I might just run the stock shortblock till it dies...then get a 306.

 

9

96darkhorse

Founding Member

Oct 2, 2001

693

0

16

wilmington, california

Jun 27, 2005

#15

• Jun 27, 2005

• #15

p heads will feed a 306 just like a 302

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 27, 2005

#16

• Jun 27, 2005

• #16

but a 306 neeeds more air than a 302..., would the heads be too small?

 

CManT1914

New Member

Feb 5, 2004

3,172

2

0

Killeen, Texas

Jun 27, 2005

#17

• Jun 27, 2005

• #17

matthiasj said:

but a 306 neeeds more air than a 302..., would the heads be too small?

Click to expand...

4 more cubic inches isn't gonna need THAT much more air, you'll be just fine.

EDIT: Don't your heads have work done already anyway?

 

DFG 5OH

Active Member

Aug 28, 2004

1,341

0

36

Louisville, KY

Jun 28, 2005

#18

• Jun 28, 2005

• #18

3 angle valve job...nothing major...i'm gonna call a guy tomrrow, i'd like to get my heads/intake ported. but for now i'll just go with stock block/non ported heads till the block gives out. I dont have the money to build up a nice stroker. I just wanna see how its gonna do wit this chit. The bottom end will be my next project.

 

BlueOvalStangGT

Active Member

Oct 27, 2003

2,849

0

46

Tampa Florida....USF!!!

Jun 28, 2005

#19

• Jun 28, 2005

• #19

Wahts this B&B shortblock you speak of grady? I need a new shortblock and never heard of this one before.

 

GRGT1994

New Member

Sep 22, 2004

1,034

0

0

Jun 28, 2005

#20

• Jun 28, 2005

• #20

Hey, for those who know, how long does a bottem end rebuild take? I am thinking that would be a winter project.