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Thread: Nissan Sentra All Motor SR20VE 12 Seconds

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Posts: 61-70 of 136
2012-08-31 16:02:50
#61
Yeah N1 pistons should be ~12.5:1. SR16's should be 13.0-13.2:1. Headgasket and how much milling was done to the head also come into play. Regardless, its a pump gas limit car. Thing is moving hard. Hopefully we can see some more cars doing this.

The numbers sound right. My 2.0 with sr16's was making about 222whp with more weight/stock trans and trapped 107mph.

Keep it up boys.
2012-08-31 16:04:37
#62
Originally Posted by Digitek
Payu their going to be selling FTW racing fuel that would be interesting to test.


Very curious to see how FTW fuel plays out in our motors. Other cars have been should solid gains. Its tough to decide if you really wanna spend 160$ on 5 gallons of fuel.
2012-08-31 16:13:55
#63
Originally Posted by nismo94tuner
Originally Posted by Digitek
Payu their going to be selling FTW racing fuel that would be interesting to test.


Very curious to see how FTW fuel plays out in our motors. Other cars have been should solid gains. Its tough to decide if you really wanna spend 160$ on 5 gallons of fuel.


Thats the only down side $$$ but It would be nice to give it a try. I know one of us will give it a bite . But what ill be using is sunoco 100oct on my road race B13 it has a similar setup to Pitos engine.
On my B14 im more inclined into mixing 100 w/ 91 since it gets street driven but not daily.
And C16 on the S13 or so...
2012-08-31 16:21:18
#64
Originally Posted by TRUSE-R
First off awesome car and driving.. Second, what rpm do you launch and shift at? What afr did you tune the car to? I am gna do a similar build but with N1 pistons. I hope I can get similar results.. Here's a link to my car build: http://www.sr20-forum.com/drag-strip/37196-guam-sr20ve-new-times.html
Late,
Ken


Around 4.5-5k 2 step shifting at 9k.

Car had a bit rich a/f of low 12s its getting retuned but it should be around 12:8-13
2012-08-31 17:05:42
#65
Originally Posted by happyharrysco1


16ve non n1 piston dome 9.6cc
ve combustion chamber 41.8cc
bore 86mm
stroke 86mm
gasket bore 87mm
compressed gasket 1.1mm
ptd 0.05mm

do the calcs yourself,
Engine Compression Ratio (CR) Calculator
Engine Size and Compression Calculator

the post you linked has a modified combustion chamber and i presume it's n1 pistons as they have a 6.8cc piston dome iirc


It gives 13:8:1

I remember measuring the inside diameter of a VET hg and it wasn't 87mm it was close though but the difference wouldn't change much.

I didn't imagine these pistons were so high cr. are all the # 100% right? the dome height I think its a bit less cc's and Piston Deck Clearance 0 but Anyways thats great CR im happy with it and the results are good for oem pistons

changing the values of piston dome to 7cc and 0 deck clearance.

13.084361071492413:1
Last edited by Digitek on 2012-08-31 at 17-58-56.
2012-08-31 18:44:46
#66
So what would be n1 pistons on de rods in de block with 20ve head yield with vet metal head gasket? 12.5?

Sent from my EVO using Tapatalk 2
2012-09-01 14:48:26
#67
Guess the known ....isn't anymore

Sent from my EVO using Tapatalk 2
2012-09-02 08:24:28
#68
wow
2012-09-03 10:57:14
#69
Originally Posted by Digitek
Originally Posted by happyharrysco1


16ve non n1 piston dome 9.6cc
ve combustion chamber 41.8cc
bore 86mm
stroke 86mm
gasket bore 87mm
compressed gasket 1.1mm
ptd 0.05mm

do the calcs yourself,
Engine Compression Ratio (CR) Calculator
Engine Size and Compression Calculator

the post you linked has a modified combustion chamber and i presume it's n1 pistons as they have a 6.8cc piston dome iirc


It gives 13:8:1

I remember measuring the inside diameter of a VET hg and it wasn't 87mm it was close though but the difference wouldn't change much.

I didn't imagine these pistons were so high cr. are all the # 100% right? the dome height I think its a bit less cc's and Piston Deck Clearance 0 but Anyways thats great CR im happy with it and the results are good for oem pistons

changing the values of piston dome to 7cc and 0 deck clearance.

13.084361071492413:1


Use the same numbers I provided but change the stroke to 68.7mm and see what comes up, that shows the numbers are accurate

....phone....
2012-09-04 13:48:16
#70
This thread has gone to the "guess that compression" game =] the car moves good!!
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