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[lilpooh21186]

 i have a potential customer he has a b16 block eagle rods w/ Ctr Pistons. Most after market pistons have the locked wristpins oem piston use the press tip so how can i get these to work on the eagle rods.

[turbohf]

yeah, rebush the small end of the rod....

just use the stock B16A rods... they arent gonna break, unless he spins a bearing...

[lilpooh21186]

thats what i told him but the plan is also 150 shot of naws to turn him out

[turbohf]

thats what i told him but the plan is also 150 shot of naws to turn him out

just use the stock B16A rods... they arent gonna break, unless he spins a bearing...

 :yes:   might wanna also add "shitty tuning" too that now also.

what you should do is talk him into some real pistons. not some cast CTR shit that aint made for anything but a B16B...

[88dx]

I would do whatever they say to do on Honda-tech they pretty much know everything over their.

[lilpooh21186]

i talked him in to the fjd piston kit id like to see a aftermarket piston also but he's tight on $$$

[chris]

stock b16a rods can handle 400 whp all day



sell the rods
buy forged pistons


Throw has much namz on the car he wants


He's fixing the wrong shit. Stock b series rods especially b16a are fuckin strong


Also turbohf is correct b16b pistons are not made for b16a's. Not sure why people havent figured out the b16b is a gsr/type r block


if you want a high compression oem piston for the b16a buy a jdm p30

[88dx]

NPR make a cheap ass set of pistons also with rings they where under $100

[lilpooh21186]

do these pistons fit eagle rod? or oem

[chris]

Its a copy of oem cast piton so no go



You guys are approaching this the wrong way stock b16a rods are the shit no need to replace them.

[Joseph Davis]

CTR pistons = power loss because the burn doesn't want to climb that dome, it gets bottle necked between the peak and the roof of the chamber. 

If you want CR then weld on the chamber and increase quench which also increases effective octane.  Start off trying to replicate a GSR head and go from there.

[turbob16hatch]

Not only the issue of bottle necking power at the peak, but the hot spots, detonation because of them, and engine failure.  I've personally witnessed two GSR's with CTR pistons failing on 93 octane (one used an SAFC, granted), which is about as much octane as I would want to feed a mediocre engine. 

Last i looked CR was like 12.xx with those. that to me seems kinda high for 93 idk though.

[chris]

Turbohf on the baord has that piston in his b20vtec that has being rapped for a long time now.

[Joseph Davis]

Not only the issue of bottle necking power at the peak, but the hot spots, detonation because of them, and engine failure.  I've personally witnessed two GSR's with CTR pistons failing on 93 octane (one used an SAFC, granted), which is about as much octane as I would want to feed a mediocre engine. 

Never tuned, and probably the wrong cam profile for all that CR.  You can yank a lot of timing to make the lower rpm band less ping-prone, but it nukes the exhaust valves to do it and if the cam doesn't have some overlap on the primaries to help bleed off excess dynamic CR in that power range.

One day when I have a house and a garage of my own I want to toy with 84+mm ITR style pistons.  I've seen dyno sheets (no first hand experience) of mild builds with those things blowing past 240hp.

It's the way I would go based on my experience with them.  Dave B tunes a bunch of shit, and the RS machines pistons are how he built his B20/VTEC.  Just make sure you don't wuss out on intake/exhaust as it's really easy to strangle a NA motor.  Everything that should make power usually doesn't because the owner has smashed the lower header primaries half shut because their car is ignorantly over-lowered.

[chris]

I still dont know why people dont use the jdm p30 b16a piston if you want an oem higher compression piston. If you have an obd1/2 jdm b16a well your lucky its in the motor already.

[88dx]

I still dont know why people dont use the jdm p30 b16a piston if you want an oem higher compression piston. If you have an obd1/2 jdm b16a well your lucky its in the motor already.

pretty much thats what I tell everyone who wants to do a LS-vtec. P30 pistons have the valve releifs and it bumps the CR up a bit :yes:

[lilpooh21186]

after along talk he wont ditch the eagle rods so its probly rs-machine pistons.

[lilpooh21186]

i had mildly tuned a 82mm ls-v with a Gsr head and p30 pistons i was impressed.

[chris]

probe industries makes cheap forged pistons

[Joseph Davis]

probe industries makes cheap forged pistons

That they don't recommend for 400 whp, and whose normal duty wrist pins crack and fall apart on.  One of the cars currently at the shop has them, and I think it recently shit #4 piston. 

[HiProfile]

I've seen some used press-fit forged pistons, not sure which brand, but they exist.

THe only reason to use rods NA is for higher RPM, which in case of heavy chinese h-beams, you're still risking it. Personally I'd go with the stock rods, arp's, and forged pistons. CTR's are definately not a good idea, for many reasons listed. You'll also have to use a thick HG or mill the pistons, since they stick out of every block.

If your customer whines about piston slap, donkey punch him & say he shouldn't be driving a built motor when it's cold anyways.


Ignition advance > extreme compression, at least with pump gas...

[dvst8r]

I would still take heavy Chinese rods over the stock rods, as the heavy Chinese rods have a better rod design, as well they are made from 4340, a better material.

[Ravage70]

probe industries makes cheap forged pistons

That they don't recommend for 400 whp, and whose normal duty wrist pins crack and fall apart on.  One of the cars currently at the shop has them, and I think it recently shit #4 piston. 

Bought Probes once. After 5k the skirts had cracks in them. GG

[Joseph Davis]

I would still take heavy Chinese rods over the stock rods, as the heavy Chinese rods have a better rod design, as well they are made from 4340, a better material.

I've tuned stock GSR rods revving to 9500 rpms.    You worry about compression downshifting at those speeds.