Gtir Motorsport club

Welcome to the largest Nissan Pulsar & Sunny GTI-R Forum. Masses of info, friendly members, cars for sale, lots of spares. Best forum on the net by far. Everything your gtir needs is here.


You are not connected. Please login or register

Gtir Motorsport club » General Discusion » Gtir related Discussion » Piston info

Piston info

Go down  Message [Page 1 of 1]

1Piston info Empty Piston info on 3rd April 2016, 10:16 pm

burrows1980

burrows1980
Hi,

So before I start moaning to the company who sold me the nrp rings that they don't meet the Nissan spec, can someone confirm if this is a std piston and not an over size one:

Piston info F5DFADB7-6B3C-40A3-BBD9-6DE4F06963D4_zpszcesaduu

2 is the grade, 54C engine type but what is the 05? I'm hoping not 0.5mm oversize, might explain the ring gap if it is Shocked

I measured my bored today again and they came out at 86.05 to 86.06 outside of the range in manual but within the limit.

I've not got a decent mic big enough to measure the Pistons.

Gaz

2Piston info Empty Re: Piston info on 5th April 2016, 12:19 pm

Mr B

Mr B
gtir technician
gtir technician
Can't tell you what 05 represents, would like know myself now :-)
Looks a standard 86mm grade 2 to me.
OEM pistons only do a 0.2mm oversize & only one I ever seen with oem nissan oversize was stamped 75F as uses the A201075F76 piston, there is a 54C specific oversize part number but I never seen/used one (always use CP) & most people ordering oem pistons generally end up with the alternative 75F ones . do your piston grades match the stamped cylinder grades on the block head face or have number markings been lost from skimming .
My guess from your remarks so far is rings are not as precision as should be, made worse by so bore wear but still outside of oem tolerance for new but within extreme wear limit .
PITA but oem ring set or another brand should get the tolerances better .

3Piston info Empty Re: Piston info on 5th April 2016, 7:43 pm

burrows1980

burrows1980
Yeah number 2's on the block, I did get my mate to check in work for a 4" mic, but didnt have any. He did bring me a digi vernier better than the one I have, not the best tool to measure a piston with but did get some consistant results after a while of trying. I ended up with a consistant 3.3855" which falls into Grade 2.

I contacted the seller on ebay, and ended up having a bizarre conversation via email. From telling me they arent suitable for a GTi-R and it was my fault for ordering them, corrected him by sending a photo of the purchase were the listing states N14 sunny SR20DET Laughing but finally after sending lots of spec info about sr20de(t) engine we got somewhere, so finally getting a refund for them, and yesterday I bought some Nissan Rings hopefully all should measure correctly, bit more expensive than other brands!

Just waiting on the type 1 big end bearings then rebuild underway, christ knows when it will start up though Laughing

4Piston info Empty Re: Piston info on 5th April 2016, 8:28 pm

Mr B

Mr B
gtir technician
gtir technician
standard rings 1203353J00 cover load of applications. Some years back I used riken sets on 2 builds with standard honed bore & even with honing they still came well in tolerance. worth spending the little extra to get things right/how you want them.
good on getting refund too thumbsup

5Piston info Empty Re: Piston info on 7th September 2019, 4:48 am

Xarlee


Hi,
Did you solve your gap issue by installing OEM Nissan rings?
I have the same bore as you mentioned (86.05mm) and with nrp rings I have around 0.55-0.60mm gap.
Thanks!

6Piston info Empty Re: Piston info on 9th September 2019, 7:50 am

burrows1980

burrows1980
Hi,

Yeah new oem rings solved my problem, even my original rings I took off had a gap clearance within spec!

7Piston info Empty Re: Piston info on 9th September 2019, 7:56 pm

Xarlee


Thank you!!!
Ok! I will order OEM rings! Hopefully I will have the gap within specs!!

Sponsored content


Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum