CTR pistons in my LS Build
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Honda-Tech Member
Joined: Jun 2010
Posts: 64
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CTR pistons in my LS Build
Hello Everyone,
So I just paid 1600 for my 91 DA integra, I bought the car for a daily commuter back and forth to work about 30 round trip a day. The car is bone stock but not for long. I was planning on running a my stock LS pistons with a Port a Polished GSR head. Recently a buddy of mine found a set of CTR pistons standard bore and i figured althought the car is running great why not replace the rings and now pistons. I am getting these pistons for free so thats why im considering them.
Now keep in mind I will be running a GSR head Port & Polished, CTR pistons and probably GSR cams for now, 310CC RC injectors with a Fuel Pressure regulator.and stock P28 ecu.
I have heard mixed opinions on using CTR pistons. Some people say they work great in there build and others say stay away and instead just run the LS piston. I think its all about proper tunning. I would like some feedback regarding any similar builds or ideas on what to do.
I am not new to honda or B series motors just not familiar with NA motors All I have ever ran was boost on my motors recently parted with my last 500WHP boost build in my 2000 CIVIC SI on Pump Gas
Thank You in advance!
So I just paid 1600 for my 91 DA integra, I bought the car for a daily commuter back and forth to work about 30 round trip a day. The car is bone stock but not for long. I was planning on running a my stock LS pistons with a Port a Polished GSR head. Recently a buddy of mine found a set of CTR pistons standard bore and i figured althought the car is running great why not replace the rings and now pistons. I am getting these pistons for free so thats why im considering them.
Now keep in mind I will be running a GSR head Port & Polished, CTR pistons and probably GSR cams for now, 310CC RC injectors with a Fuel Pressure regulator.and stock P28 ecu.
I have heard mixed opinions on using CTR pistons. Some people say they work great in there build and others say stay away and instead just run the LS piston. I think its all about proper tunning. I would like some feedback regarding any similar builds or ideas on what to do.
I am not new to honda or B series motors just not familiar with NA motors All I have ever ran was boost on my motors recently parted with my last 500WHP boost build in my 2000 CIVIC SI on Pump Gas
Thank You in advance!
Re: CTR pistons in my LS Build
This is NOT a good combination unless you seriously Clay this engine prior to assembly. Its not just because of the CTR pistons alone. That's not the issue. It is the combination of the LS rods, the CTR pistons, and SPECIFICALLY a GS-R head that has quench spots that add even MORE compression. Port N polish is irrelevant since it is 90% likely that you will have piston to valve clearance issues. Now from one who has done a similar LS crank /GS-R Block, B16 head, I had to be VERY careful of the pistons. even with only 5.6cc dome height, I was over 13.0:1 compression.
Now if you're a direct injected engine, that's a little low. for you, that's not good unless you plan on racing race gas all the time, and can clay the engine.
No stock P28 could even start with that compression on that small of an injector. Your stock FPR will suffice if you have an injector better than a 310cc.
You don't have to run an LS piston, but you SHOULD NOT run the CTR piston with this combination. Considering I've built both turbo and NA engines, I'm not the most brilliant person, but I'm not stupid.
Now if you're a direct injected engine, that's a little low. for you, that's not good unless you plan on racing race gas all the time, and can clay the engine.
No stock P28 could even start with that compression on that small of an injector. Your stock FPR will suffice if you have an injector better than a 310cc.
You don't have to run an LS piston, but you SHOULD NOT run the CTR piston with this combination. Considering I've built both turbo and NA engines, I'm not the most brilliant person, but I'm not stupid.
Thread Starter
Honda-Tech Member
Joined: Jun 2010
Posts: 64
Likes: 0
Re: CTR pistons in my LS Build
This is NOT a good combination unless you seriously Clay this engine prior to assembly. Its not just because of the CTR pistons alone. That's not the issue. It is the combination of the LS rods, the CTR pistons, and SPECIFICALLY a GS-R head that has quench spots that add even MORE compression. Port N polish is irrelevant since it is 90% likely that you will have piston to valve clearance issues. Now from one who has done a similar LS crank /GS-R Block, B16 head, I had to be VERY careful of the pistons. even with only 5.6cc dome height, I was over 13.0:1 compression.
Now if you're a direct injected engine, that's a little low. for you, that's not good unless you plan on racing race gas all the time, and can clay the engine.
No stock P28 could even start with that compression on that small of an injector. Your stock FPR will suffice if you have an injector better than a 310cc.
You don't have to run an LS piston, but you SHOULD NOT run the CTR piston with this combination. Considering I've built both turbo and NA engines, I'm not the most brilliant person, but I'm not stupid.
Now if you're a direct injected engine, that's a little low. for you, that's not good unless you plan on racing race gas all the time, and can clay the engine.
No stock P28 could even start with that compression on that small of an injector. Your stock FPR will suffice if you have an injector better than a 310cc.
You don't have to run an LS piston, but you SHOULD NOT run the CTR piston with this combination. Considering I've built both turbo and NA engines, I'm not the most brilliant person, but I'm not stupid.
.my ls pistons should be good for now.
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