Engine Rebuild...

[Rice_slayer]

Well, I am back for more info . Anyways, I was going to do my h/c/i this summer but my dad brought a very good point to my attention, my engine has 214k on it and I am adding more power. Now, I will still do it but he said that a good project(And learning experience since I want to go into automotive for a career) would be to stoke the engine to 327 by rebuilding it. Now, I would be doing this probably summer of 2010 due to time/money. Has anyone done a complete rebuild like that here and if so, how hard was it?

 

[95-stang]

Thats the sort of dad to have, he's right on getting it rebuilt at that mileage.

 

[Rice_slayer]

Thats 214000km, not miles, but the engine runs like a top and only burns like 1/4-1/2 litre of oil each change... It was a commuter car when my brother bought it and was used to commute into the city everyday(thus, the vast majority of the miles are highway driven). Sad thing is, this engine runs better than my friends 95' GT with only 145k on his ccasion14:

 

[GDTrumbo]

I did a few engines in Auto Tech years ago. It's a job. As long as you have the right equipment, the measuring/mathmatical know-how and the patience, it's not too bad.

If your gonna build a "stroker", go with the 347. Hell... might as well....

GT

 

[Rice_slayer]

lol this is a DD, 347 is little bit harsher on gas then a 327 would be. Im just doing new pistons/crank/bearings and all that stuff, no bore-ing.

 

[LAFENATU]

Why are you looking to do a 327??

Seriously, you could build a stout 306, make it just as strong and it would probably last longer too..

 

[duh09]

Stroking confuses me, I thought you'd have to bore, to actually get a bigger displacement. I guess I don't understand it enough...

You all talk about it and I'll read and learn and stuff.

 

[94kingcbra]

When you do a stroker your increase the distance that the piston travels. Thus increasing the displacement. I would do either a 331 or 347 just because there are more kits available, and when there is more available, the prices are cheaper.

 

[Rice_slayer]

I'll go with the 331 probably then. I have seen some done up 347s run in the 10s for god sakes! It would be pretty sweet if I could save the like $3500 for summer to do all my engine work, but Im doing the suspension, interior and exhaust first, which will cost probably $3000 alone...

 

[Steven]

347 is an oil eater unless you use the correct rods. A stroked 302 isn't worth its cost, your better off doing a longrod 302, you'll get the same results. DSS has a set of pretty decent pistons made to do a longrod motor. All your doing is decreasing compression height and increase rod length to get an ideal rod ratio. Your torque will increase much like a stroker, without having to go as far as stroking a motor.

 

[1quk50]

im doing a 306 on my car after christmas!

 

[Rice_slayer]

Uhmm I have been searching after hearing everyone's opinion here and will go with the 331. Which place do you guys recommend me picking the kit up from? This job is just replacing all the pistons/rods/crankshaft right? Obviously all the bearings too. I will ask my teacher if we can do this as our A20(engines class) project. I wouldn't mind giving my car up, besides I have to drive my explorer soon anyways...

 

[hollywoodstang]

I went CHP 347 for daily driver. I thought about 306, i thought about 331. Called CHP called D.S.S. If you bascially just want to rebuild and keep the street 306 is the way but why?!, 331 WHY?! 347 perfect!

there is no point going 331 or 306. Plenty of torque from 347 for the street. Oiling issue? i guess you are talking to "Old school" hot-rodders that can't get over the fact that that is no longer a problem these days, That's a problem in the past.

CHP street fighter block cost $2000 built. and add those supporting mods:Soon to be added(next summer's project)- 3.73s, JLT CAI, 1995 Cobra upper/lower intake, AFR 165 heads, and Magnaflow 2.5' exhaust system with hi-flow cats.

You be very happy with "Good Tune". If you are staying N/A daily driver go 347. by the way 306 block, 331 block, 347 block they all cost the same. So this is really no brainer.

Good luck man

 

[Rice_slayer]

How much more gas will a 347 suck vs. a 331? Im using my stock 302 block, just throwing the stroker kit in. BTW, all those mods are mostly going in in 2010 when I get the body completely redone. Im doing exhaust/gears/interior/suspension in the next year.

 

[GDTrumbo]

lol this is a DD, 347 is little bit harsher on gas then a 327 would be. Im just doing new pistons/crank/bearings and all that stuff, no bore-ing.

Until you get in there and measure the cylinder walls for wear/taper, you won't know. With that block and it's miles, fitting new pistons may require boring. With that in mind, the block may also need "line-boring" so when the crank/bearing kit is installed, everything is good & straight. Spinning a main bearing sucks!

As for the 347 mpg, depending on how it's built, could get better mileage than the 302 or the 331. It's all in how hard the engine has to work.

GT

 

[Steven]

347's typically eat more oil due to the rod stroke. It's been proven, over and over and over. Even if you stroke it you still have a junk block that won't take much more.

 

[94Snake]

I went CHP 347 for daily driver. I thought about 306, i thought about 331. Called CHP called D.S.S. If you bascially just want to rebuild and keep the street 306 is the way but why?!, 331 WHY?! 347 perfect!

there is no point going 331 or 306. Plenty of torque from 347 for the street. Oiling issue? i guess you are talking to "Old school" hot-rodders that can't get over the fact that that is no longer a problem these days, That's a problem in the past.

CHP street fighter block cost $2000 built. and add those supporting mods:Soon to be added(next summer's project)- 3.73s, JLT CAI, 1995 Cobra upper/lower intake, AFR 165 heads, and Magnaflow 2.5' exhaust system with hi-flow cats.

You be very happy with "Good Tune". If you are staying N/A daily driver go 347. by the way 306 block, 331 block, 347 block they all cost the same. So this is really no brainer.

Good luck man

+1

if this is a daily driver then you should want the low end torque of a 347, most guys put an h/c/i combo on their 302 motors to make the n/a horsepower i make and no where near the torque and my combo runs out of steam at 5400 rpms. as far as burning oil, mine doesn't. just reuse the junk top end build a fresh 347 foundation and improve on it when money comes in from the NASCAR engine building career you should be striving for, as far as engine handling the power, a girdle can be bandaid but i'm thinking you won't see 500 rwhp or beating it up with a pair of slicks or nitrous so...who cares. as far as gas goes, it's a v8....you'll be stop'n'go traffic somewhere.....and the bottom line: "there's no replacement for displacement".

 

[Rice_slayer]

I have been looking at just rebuilding the stock 302 and getting my AFR 165 heads instead. I found a complete rebuild kit(new pistons, all the seals/bearings, new rods, oil pump and gaskets) for only $550, I can use the other $1500 to get the heads .

 

[Rice_slayer]

Alright, I will be going with a rebuild kit for my 302, This will give me enough money to get the tranny done too, I might not get the heads until summer time sadly. Anyways, The cnd dollar going into the crapper really screwed me on this but where would you guys recommend getting a rebuild kit from?

 

[Steven]

Jegs isn't bad. If your going to all the trouble to do a rebuild with pistons, they will be already notched for larger valves. Pick up a set of 185 AFR's. Don't waste your time with 165s. 185's can be used from strokers to 351's to supercharged/turbo/nitrous motors. They are great all around heads, and aren't to large. 165's leave much to be desired in the long run.