Running ls crank ls rods and ctr pistons in gsr bottom' will i have clearance issues
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Joined: Aug 2008
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From: el paso, tx, usa
Running ls crank ls rods and ctr pistons in gsr bottom' will i have clearance issues
Im running a gsr bottom end with ctr pistons Ls rods and rod bearings gsr mains and girdle and a gsr head. will i have any problems with clearance? due to the aggresive dome of the ctr's' and the ls rods and crank... please help before i assemble!!! has any one else done it ? and i know i have to cap the squirters... oh yeah its going in my 91 hf rex!!!!
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Joined: Dec 2007
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From: Central, Florida, United States
well
if you have to ask
you shouldnt have a set up as agressive as that
you obviously dont know what you are doing.
thats REALLY high comp. for a 1.8L block.
but you shouldnt have clearances issues
so go ahead.
hope you have some good rods
if you have to ask
you shouldnt have a set up as agressive as that
you obviously dont know what you are doing.
thats REALLY high comp. for a 1.8L block.
but you shouldnt have clearances issues
so go ahead.
hope you have some good rods
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From: Orange County, NY
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From: SE, PA, usa
You're going to have a couple problems with this setup.
First of all, ctr's stick out of the hole ~0.005" on a untouched block. If yours has been decked at all it will be more. With a stock headgasket and gsr head, that puts you at ~0.025" max piston to head clearance, i.e. NOT enough.
Second, you will be well over 13-1 CR. Not going to work well on pump gas no matter what people say.
If you haven't installed the pistons yet, GET RID OF THEM! Try b16 or itr pistons instead.
If they are installed, you can use a thicker headgasket as a bandaid to alleviate some of the above problems. Not the right way to go really.
First of all, ctr's stick out of the hole ~0.005" on a untouched block. If yours has been decked at all it will be more. With a stock headgasket and gsr head, that puts you at ~0.025" max piston to head clearance, i.e. NOT enough.
Second, you will be well over 13-1 CR. Not going to work well on pump gas no matter what people say.
If you haven't installed the pistons yet, GET RID OF THEM! Try b16 or itr pistons instead.
If they are installed, you can use a thicker headgasket as a bandaid to alleviate some of the above problems. Not the right way to go really.
Thread Starter
Junior Member
Joined: Aug 2008
Posts: 18
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From: el paso, tx, usa
You're going to have a couple problems with this setup.
First of all, ctr's stick out of the hole ~0.005" on a untouched block. If yours has been decked at all it will be more. With a stock headgasket and gsr head, that puts you at ~0.025" max piston to head clearance, i.e. NOT enough.
Second, you will be well over 13-1 CR. Not going to work well on pump gas no matter what people say.
If you haven't installed the pistons yet, GET RID OF THEM! Try b16 or itr pistons instead.
If they are installed, you can use a thicker headgasket as a bandaid to alleviate some of the above problems. Not the right way to go really.
First of all, ctr's stick out of the hole ~0.005" on a untouched block. If yours has been decked at all it will be more. With a stock headgasket and gsr head, that puts you at ~0.025" max piston to head clearance, i.e. NOT enough.
Second, you will be well over 13-1 CR. Not going to work well on pump gas no matter what people say.
If you haven't installed the pistons yet, GET RID OF THEM! Try b16 or itr pistons instead.
If they are installed, you can use a thicker headgasket as a bandaid to alleviate some of the above problems. Not the right way to go really.
Thread Starter
Junior Member
Joined: Aug 2008
Posts: 18
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From: el paso, tx, usa
i sold my ctr pistons today i bought a t3 t4 turbo want to boost with ls crank ls rods and gsr pistons in the gsr block completley changed my setup. just happend to run into that turbo go figure... any suggestions???????????? oh ported head and valve job is done wtha skunwerks intake
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From: Ventura, CA
Just use the biggest possible cam you can find, like a stage 3. And make sure both side of your turbo is the same size.....The stock ecu should be fully capable if you install 720cc injectors.....Good Luck.
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From: Ottawa, Ontario, Canada
I built and ran a GSR block for a while. I put the pistons on the milling machine and made small reliefs for the oil squirters. This didn't work out as they all cracked where I milled them - not enough stress relieving... 
For my setup I used the entire LS rotating assembly. Beat the **** out of it but ultimately the LS rods didn't like 8250rpm 'cause I spun a rod bearing. It was all parts bin stuff anyway.
-Michael
For my setup I used the entire LS rotating assembly. Beat the **** out of it but ultimately the LS rods didn't like 8250rpm 'cause I spun a rod bearing. It was all parts bin stuff anyway.
-Michael
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