So this month i started tearing down my first engine build. I picked up a complete GSR block for 900$, wish it could have been less but i was under the gun and took what i could find but it was a good enough deal. It was a bittersweet find, after figuring out the block had been decked .008 of an inch, and i havent even checked the head for milling yet, i guess out of fear. The owner of the engine said he pulled it out smoking, and when i pulled the pistons out some of the ringlands came out seperately too. he swapped the motor out of a car he bought so whatever had been done to it, wasnt by him. The block was bored over .030in and the cylinders seem to be in decent enough condition. I was planning on going 1mm over anyways, so i guess this is of no concern to me. The only thing i worry about is what my compression might be with the rs machine itr pistons and the block being shaved so much already. Im not going for something huge compression wise.

the crank was in decent condition, but one of the main bearings had a bit of metal debris on the side of it, but my teacher told me that its definitely fixable, and we will just turn it. Most of the journals looked pretty good, but a couple looked like they will need some work done. It makes me nervous to do machine work on the crank because i want to use this motor for some road racing/hpde events, and dont want to put extended stress on a crank that isnt fully capable strength wise, is this something i should worry about?

For now, the work being done on the block is going to be pretty simple. Ill lighten the crank, use the RS machine ITR pistons, ARP rod bolts, new bearings of course, gaskets, and i guess if theres anything that i might not be thinking of that you feel necessary to point out, go ahead, im all for corrections or help. Ill get more info up on the build later. Going back to class for now




Modified by clem kevin at 10:39 AM 9/24/2008


Modified by clem kevin at 10:44 AM 9/24/2008


Modified by clem kevin at 10:56 AM 9/24/2008

 

its not a v8 do not turn it unless your gonna have it rehardend. just pick up a used one for around 100$

 

I guess if i can find a gsr crank for the same or less than price of turning the crank, sure? Have one?

 

I also think your better off with a new crank.Get an LS crank though for the extra stroke and displacement.

 

If you look around you can find a gsr or type r crank for less than 150. Or you can find a Ls crank and rods for less than 150.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g hatch &raquo;</TD></TR><TR><TD CLASS="quote">its not a v8 do not turn it unless your gonna have it rehardend. just pick up a used one for around 100$</TD></TR></TABLE>

Sage advice.

 

Agreed...Get a good used crank with stock sized journals...
.008" isnt that much off the block...There are so many headgasket thicknesses available, you can easily correct anything if needed to get the proper compression...
The compression "specs" should really just be used as an estimate as headwork,gasket thickness,crankshaft choice, will all affect the actual compression.
Measure everything...

 

i wanted to stick with the gsr crank because, of course, i still have the rods, and i want to keep the oil squirters in there without any drama. ill be consulting the teacher thursday

 

if i posted pictures of the journals could anyone give me an estimate of whether the crank only needs micropolishing or not? the journal in question, you can feel a scratch with your nail, but nothign too bad

 

You can get a thicker HG like already mentioned, or do some head work, work on the combustion chambers, deshroud the valves which will increase the displacement a bit and lower your CR a bit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ruffrhyder &raquo;</TD></TR><TR><TD CLASS="quote">work on the combustion chambers, deshroud the valves which will increase the displacement a bit and lower your CR a bit.</TD></TR></TABLE>Sorry but you can put a BBC chamber on the motor and it won't increase displacement.

Displacement -the amount the piston top moves up and down or "displaces" not the total volume of the cylinder.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fkned &raquo;</TD></TR><TR><TD CLASS="quote">Sorry but you can put a BBC chamber on the motor and it won't increase displacement.

Displacement -the amount the piston top moves up and down or "displaces" not the total volume of the cylinder. </TD></TR></TABLE>

I just think he confused the words "displacement" with "volume."

 

yes I'm sure he did,but to let this go will only confuse others who don't understand these things.

 

Don't turn the crank, listen to everyone else. You would need to get it re coated as well as stress relieved.
Do like the others said and get a ls crank and matching ls rods. I'm sure someone here will give you a set of ls rods for free. If you can feel any scratches on the crank at all its junk. Ok if it's going to be a low rpm motor that your not to concerned with longevity then you can get away with a mild scratch but get into the practice of rejecting any crank that has scratches.
As far as squirters go, if you cant bend them for the proper clearance then just take them out and plug them. Its no worse then running a scored crank

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clem kevin &raquo;</TD></TR><TR><TD CLASS="quote">if i posted pictures of the journals could anyone give me an estimate of whether the crank only needs micropolishing or not? the journal in question, you can feel a scratch with your nail, but nothign too bad</TD></TR></TABLE> if you decide to go with a ls crank let me know we have them for 100 shipped and they come micro polished

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fkned &raquo;</TD></TR><TR><TD CLASS="quote">Sorry but you can put a BBC chamber on the motor and it won't increase displacement.

Displacement -the amount the piston top moves up and down or "displaces" not the total volume of the cylinder. </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phil M &raquo;</TD></TR><TR><TD CLASS="quote">

I just think he confused the words "displacement" with "volume."</TD></TR></TABLE>

Sorry Ed, thanks Phil, yes I meant CC volume. A 14 hour work/school shift on 4 hours of sleep makes my mind slow.

 

i know that the ls crank will increase my torque a bit, but wont it move my powerband a bit? I wanted something that would make power to 8500 and was planning on using itr cams and an aebs intake manifold. doesnt the 89mm stroke pull the powerband down a bit more?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Golden Eagle &raquo;</TD></TR><TR><TD CLASS="quote"> if you decide to go with a ls crank let me know we have them for 100 shipped and they come micro polished
</TD></TR></TABLE>

thanks for the offer, and ill be keeping you in mind

 

No a 2mm increase isn't going to move your power band around besides the fact you will make more power everywhere.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Golden Eagle &raquo;</TD></TR><TR><TD CLASS="quote"> if you decide to go with a ls crank let me know we have them for 100 shipped and they come micro polished
</TD></TR></TABLE>



pretty good deal! shipped!

 

i know, for real

but the owner of the engine is a stand up dude and is offering me an LS crank, so if that one is no good, ill surely get one. thanks golden eagle

 

Nice to see someone doing the same exact build as i am except I'm going with the 89mm crank. well that's still a iffy. My car will be seeing daily use though.

 

my car will be daily driver, i drive my jeep a lot too but i love this car more

ill try entering into one of the redline time attack's next year, looking to have this as a fun track car. ive had the car for 2 years, dont think ill ever give it up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clem kevin &raquo;</TD></TR><TR><TD CLASS="quote">i know that the ls crank will increase my torque a bit, but wont it move my powerband a bit? I wanted something that would make power to 8500 and was planning on using itr cams and an aebs intake manifold. doesnt the 89mm stroke pull the powerband down a bit more?

thanks for the offer, and ill be keeping you in mind</TD></TR></TABLE>


I don't think your going to make power to 8500 with the itr cams nor the Aebs intake mani. I bet you wont peak much more than 8100.
And if its street car you would be better off making more power at lower RPM. How often are you going to be at 8500? You shouldn't want to be.

 

Listen to this man, he knows his stuff Glad to see you posting again Tom

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote">


I don't think your going to make power to 8500 with the itr cams nor the Aebs intake mani. I bet you wont peak much more than 8100.
And if its street car you would be better off making more power at lower RPM. How often are you going to be at 8500? You shouldn't want to be.</TD></TR></TABLE>

i guess im just not so worried about having power down low. I have a jeep for torque if i need a push. My goal with the motor is not to make a bunch of power, but to just make a smooth powerband (which comes with tuning) but i want to be able to put the right parts together to do so.