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forged pistons, oversized valves whats there for the beams?

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gavinda
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forged pistons, oversized valves whats there for the beams?

Postby gavinda » Fri Dec 19, 2014 8:59 pm

Hi, new to tezzaworld. Im building a beams turbo and there doesnt seem to be much aftermarket to go turbo. Looking for valve springs and oversize valves, think pistons will have to be custom as I want 87.5mm or 87 stroker pistons. But it would be good to know who has made them before in stock size forgies. Seen CP mentioned before any others got them on file?
Thanks

Soiled
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Joined: Sat Dec 11, 2010 3:35 pm

Re: forged pistons, oversized valves whats there for the bea

Postby Soiled » Sat Dec 20, 2014 2:38 am

Wiseco, JE, Toda, TRD alldo forged pistons for our engine, all have oversized options too. Pistons don't affect stroke though you'll need a new crank if you want to go stroker.

Trd and Toda do heavy valve springs or you could double up factory.

Why do you need oversized valves? The manual head valves are already massive.

Nick the site trader does a great deal on forged pistons and rods, pretty much the best price you're going to get. Think they're cp pistons and eagle rods. Which you'll be able to state oversized or not.

gavinda
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Joined: Fri Dec 19, 2014 8:41 pm

Re: forged pistons, oversized valves whats there for the bea

Postby gavinda » Sat Dec 20, 2014 11:15 am

Yeah got stroker crank, just meant normal forged piston is no good needs to be stroker piston or else they will hit the head. 91mm stroke 87.5mm bore

Yeah valves are big on the manual head I have, but are the titanium ones ok for boost, I heard there was an issue so was going to replace them with some super alloy ones, exhaust valves need to take a lot of heat in turbo application, so if replacing I will go bigger to increase flow.

Thanks for the help

Soiled
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Joined: Sat Dec 11, 2010 3:35 pm

Re: forged pistons, oversized valves whats there for the bea

Postby Soiled » Sat Dec 20, 2014 12:13 pm

Only problem with titanium is that it's hard so instead of bending they shatter if a piston hits them.

I have 355kw at the wheels and the head is factory apart from cams and valve springs

gavinda
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Joined: Fri Dec 19, 2014 8:41 pm

Re: forged pistons, oversized valves whats there for the bea

Postby gavinda » Sat Dec 20, 2014 1:01 pm

Upgraded cams? Do u still have full vvti movement?

Has that setup been running long/ lasted long ne good to know

Soiled
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Joined: Sat Dec 11, 2010 3:35 pm

Re: forged pistons, oversized valves whats there for the bea

Postby Soiled » Sat Dec 20, 2014 5:26 pm

Yes still retained vvti, been running with this build since 2010.

turbotezza
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Re: forged pistons, oversized valves whats there for the bea

Postby turbotezza » Tue Dec 23, 2014 8:35 am

what turbo are you running guru please ?what boost? whats the lag like ?

turbotezza
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Re: forged pistons, oversized valves whats there for the bea

Postby turbotezza » Tue Dec 23, 2014 8:36 am

oh what do you mean double up the springs ,use 2 sets ? hows that work/put together? ty :D

Soiled
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Joined: Sat Dec 11, 2010 3:35 pm

Re: forged pistons, oversized valves whats there for the bea

Postby Soiled » Tue Dec 23, 2014 4:38 pm

Double valve springs, basically just intertwine two sets of springs, tends to be more common in Honda engines to increase redlines and avoid valve float.

I use a garrett GT3076 with a .64 exhaust housing, lag is minimal. Unless you're trying to build boosting 6th gear from 2,000rpm :p

1 bar boost it makes 314kW

1.6 bar it makes 355kW


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