Mike, I ran across a thing last night that would fix you right up. One of the major cam grinders, seems like Isky, offers a cutter that replaces the valve head. Install a shank and turn it into the piston, cutting a pocket as it goes. If you degree when the piston needs clearancing you can take care of it. I'm sure they'll provide instructions too.
Thanks Loren,
That sounds like a dandy tool for sure! I'll bet they make it for Chevies but probably not for an E-series. I have to go out and measure the E16 valve stems again. It's been 10 years since i built my last E-series. I think they're 6mm?
Oh yeah, I'm sure of the Chev. situation. But maybe they can be modified or have a size close enough. ?? Looks to be 7mm. stem on both intake and exhaust going by Sealed Power.
Here is a picture of the E16 "Euro" pistons I need. This is a picture of the .5mm over shortblock I built in 1994. I need the same pistons only I need them to be standard bore. Part number is 12010-13M22. There has to be a set of these lying dormant on somebody's shelf.
What happened to this .5mm [.020"] over E16? Well I topped it off with a brand new big valve 15M FI head on it with an Isky .417" lift reground cam. With the twin side drafts, this thing ran great! [14.75 @ 91 mph] in my B11. But the VW's were still beating me on the ice so I had to upgrade even more. Just two months later, I built the 13 to 1 engine shortly after that and ran 14.18 @ 96.9. So I took this freshly built engine out after only two ice races and stored it as a spare. I sold it about 5 years later [thinking I would never need it] for $350 to a stock car racer who ran it once I think and the carb was left loose so it was running badly. He sold the car [with this engine in it] for pennies on the dollar to a young person just getting into racing and he hasn't run it yet. Can you imagine? A high perf E16 engine like this and no one is doing anything worthwhile with it? I would be ready to buy the thing back in a heartbeat!
go to the parts store. order some E15 pistons. '83 MPG, if they get that detailed. should be the same.
there was also some chatter on here about using the GA16DE pistons AND RODS for a long-rod E16. this'll get you better dwell and lower peak piston speeds for better ignition and less piston side load.
ah. there's a pic you threw up already... that's the deal. just cut some valve reliefs. you should be able to have a shop mill them in, provided you know the diameter and depth. the dia you can measure, and the depth can be measured by a decent shop with a depth gauge, you'll just need to make a plot of piston height and valve lift (from head surface) vs crank angle and do some addition/subtraction.
blown, PM'd ya.
__________________
's like shootin' 'tards in a bucket.
Sounds like you've lost track of that engine at this point huh, Blown? Seems a shame to let that waste away.
I saw the GA's and looked at them. My book shows the GA16 comp. height as 29.5mm, 3 lower than the E16's. The A15 @ 30.0mm. If I can't find a set of rods from the A15 I figured to use the GA's. May be a better idea anyway as the GA's have what looks to be a shorter skirt height(lighter weight maybe) and a flatter top(higher comp. possibly). I'd probably be gaining some or more of the weight back using the longer A15 rod though.
One thing that wonders me is the difference between the 0.0mm pin offset E16's and the 1.0mm offset on the GA16 pistons. What effects will that have on the E16?
One thing that wonders me is the difference between the 0.0mm pin offset E16's and the 1.0mm offset on the GA16 pistons. What effects will that have on the E16?
I contacted this company in japan, they will make pistons that can handle 46 psi of boost with alcohol for $130 a piece. all you have to do is send them a sample piston. here is the link http://www.supertechperformance.com/pistons.htm[/url]
I think that is a Nissan factory grade number for ultra close tolerances when Nissan is assembling a new engine on the assembly line. I think the grades are based on ten thousandths of an inch. It isn't anything we need to be concerned with.
On later engines they have similar grade numbers on main bearing journals and rod journals as well, but they are really splitting hairs with these fine grades.
Hi guys,
I got something you got to explain : the NLA pistons 12010-13M22 are those Euro pistons and i did a little research and found a list, that those are interchangable with the 12010-73A22 (which we use in our E16S) and also with the 19M22, 11M22,13M02 and the 15M02.
I found that strange that these pistons would really be interchangable.
I cc'ed a 73A22 and got approx 24cc so the pistons are not the same but listed as interchangable E15 pistons ?
Result:
Our S models got 24cc-pistons (like on the pic I posted before) with valve reliefs and 17,9cc for the head which makes a comp. ratio of 9,59:1.
The I-models got 17,9cc pistons (33M22) and 24cc for the head: comp. ratio of 9,59:1.
What is this did they put all the parts in a box shook it and voila an E-engine and so on...
Last edited by b12brothers : Jun 10th, 2008 at 03:52 PM.
hi guys, i`m newbie here. from malaysia
i`m driving b11 yr 83, " heart swaping surgery" was done a yr ago from E13 to E15E (from hb12)
i`ve been searching around to get more info about my e-engine, i found that this forum has most complete info for this engine....
few question here,
anyone know the compression ratio for E15E? wat piston was using by this engine?
the only thing i know is the head is 15m head......any idea ?
thanks guys..
go to the parts store. order some E15 pistons. '83 MPG, if they get that detailed. should be the same.
there was also some chatter on here about using the GA16DE pistons AND RODS for a long-rod E16. this'll get you better dwell and lower peak piston speeds for better ignition and less piston side load.
ah. there's a pic you threw up already... that's the deal. just cut some valve reliefs. you should be able to have a shop mill them in, provided you know the diameter and depth. the dia you can measure, and the depth can be measured by a decent shop with a depth gauge, you'll just need to make a plot of piston height and valve lift (from head surface) vs crank angle and do some addition/subtraction.
blown, PM'd ya.
wat is the different between normal e15 piston and e15 mpg model? any picture? sounds interesting with this....can swap to normal e15 engine? hehe... so much question...
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