Hey guys just had a few questions before I whip out the specs and start drooling over them, I am using a LS block with LS crank/rods but im gonna throw on some GSR pistons. Iv read that theres some clearance issues between the piston/rod clearance and I might have to machine about 1mm off the rod?

Can anyone shed some light on this and whatnot (or is it just as simple as to make it work you have to do this lol)


*edit - to add onto to that im going to be using a b20 head that I am going to mill to its limit to bump compression, will I run into any piston/valve clearance taking a non VTEC head w/ VTEC pistons thats been milled to the limit?

 

Don't mill it to bump up to its max compression. Use the correct piston if there's any doubt. If you're wrong , and need to resurface the head later, it will be considered useless. Use a P30 Pistons if you want to raise the compression like that and still want to use a stock piston.

 

Im not worried about the head, after all its just a b20.

Im just trying to see if I can pick someones brain that has maybe done this build before and did it work out. Thank you tho!

so if anyone out there has thrown a non vtec head on some GSR pistons! lmk how it went please

 

You won't find a lot of people at all for the use of a B20 Head in that manner. Only those perhaps with serious machining and porting experience who bothered to utilize such a low flowing CFM head.

You're at a point where only you can determine if its worth it or not by trying it out yourself and showing the results.

 

this is what we used to do back in highschool(99') on my D16a6 motors. We would put dx pistons and mill the head .06

Motor survived for 80k miles running to 8krpm(stock redline was 6800)
The benefits of increasing compression thru milling is its cheap. The downfall is that you can no longer resurface the head unless you do major machine work to the valve seat area.

If it is a cheap and easily replaceable motor then i would say go for it. If you blow it up its fine. I bent a whole bunch of valves to find the .06 sweet spot with my bullfrog cam(never heard of claying motors back then)

 

Whatever you do just make sure you clay it so you have the extra comfort in mind.

 

Yeah will definitely clay it just wanted to see if anyone has tried something like this, IMO this motor will be a super sleeper for what it is, its basically gonna be a VTEC-less GSR motor, compression will probably come out higher then a GSR motor

 

It's the only reason why im doing it, Had this been a VTEC head I wouldnt even consider it. Its one of those things where if I break every valve on it ill giggle a bit throw it away and just buy a GSR or something

 

Sounds like alot of work and alot of headaches. Kind seems pointless when nowadays the homework has been done for you. I like the idea of doing a "JUST LIKE BACK IN THE DAY BUILD" AKA GHETTO BUILD. HAHAH but i just cant find myself putting myself through all that again to muster a low 14.

 

Im not doing this to run 11.00 flat with it.. If that was my goal I would jump my back my old hatch or old integra

http://www.youtube.com/watch?v=8kaM5v1TRZo
http://www.youtube.com/user/johnny66.../5/jkCoDy78Llw

Im doing this out of curiosity as kind of a poor mans build to how to make decent horsepower WITHOUT paying 350-400 for a head. If I pull this off and create a high compression non VTEC motor thats stupidly affordable I can vouch that MANY will follow. Ill let everyone know the results of all of this maybe it goes great or it might just be a waste of time.

 

WHY are you bent on using gsr pistons get some pr3 or p30 man.

 

I highly doubt that a fully decked block and fully milled head will clear with a B16 piston. lol (remember im building compression in a cheap, cheating way. I can almost bet you anything ill smash every valve with almost any dome piston after all the milling is done... Im betting on that, atleast on a non vtec head that normally accepts a dished piston

 

A b20 head is the same as an ls head. Unless you come across a rare p8r b20 head which has 84mm combustion chambers and 33mm intake valves.

You will not have any clearance issues utilizing the nonvtec head as it uses 31mm intake valves as well as larger combustion cambers than a p72 head which effectively make compression to about 9.6:1. You could save yourself the trouble of swapping pistons to come up with an extra. 4 compression and run a thinner one layer hg. Your looking at MAYBE a 5 whp difference over stock la pistons as you have it planned. Waste of time imo.

 

This is good info will def look into some b16 pistons now.. I want this little guy to be as high comp as possible using factory parts.