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I have yet to take a 16ve apart but im assuming the rods are a bit thinner than 20de/ve rods.
My question is would it be better to use the longer 16ve rods with an 89mm bore, or 20det rods with the same bore?
OR
get custom carrillo rods in 16ve length
Since the 16ve rods are .3406in longer than DE rods I could move the pin up 7-8mm on the 89mm piston.
If you have serious technical insight please chime in. I am aware of what rod/stroke ratio is and what the theory surround it is so don't bother sharing knowledge I can google up
I'm going to a 90mm bore and am pondering similar thoughts as the best rods... I was tossing up gti-r rods or forged ones as I will run about 150 shot of nitrous also. If there is a way I can improve my R/S ratio aswell I am quite interested.. will be watching this discussion.
Thankyou. The only person I have seen post stuff about boring really is Andreas Miko. How much and where the hell are you getting the custom rods? What pistons are you gonna use?
Carrillo rods are $337 each if i go custom. These rods are capable of handling way more HP than I will ever push. Crower will also do custom rods I believe starting at about $200 each. Everyone requires 50% deposit and 8-12weeks wait.
Pistons, I was strongly considering CP but Crower will also do pistons. If this is the case I will get both pistons and rods from the same place.
As soon as I get my motor I will take the head off and take the crank out. I will replace the crank with an 86mm one from an SR20de/ve and Clay the head. I want to get a sense of clearance before sending pistons off to be made. I will send a stock piston and stock rod to crower (or who ever) and have them work out the details for about 11.7CR and rods that can take up to 75hp per cylinder. Miko had pistons made through crower but is not sharing the Job # I need to have them make me a copy as well. He may be guarding his secrets so I will have to do it on my own
I have yet to take a 16ve apart but im assuming the rods are a bit thinner than 20de/ve rods.
My question is would it be better to use the longer 16ve rods with an 89mm bore, or 20det rods with the same bore?
OR
get custom carrillo rods in 16ve length
Since the 16ve rods are .3406in longer than DE rods I could move the pin up 7-8mm on the 89mm piston.
If you have serious technical insight please chime in. I am aware of what rod/stroke ratio is and what the theory surround it is so don't bother sharing knowledge I can google up
In my opinoin and J & Es opinion you can only raise the pin height about 5mm or so. If you go more than that the piston crown will be to thin. This can cause premature piston damage from to lean mixtures or detonation.
Now we feel if you only run one ring which is posible it can work but there will be some oil cunsumtion issues.
If you want to see what I am talking about get a SR piston and find 8mm on a ruler and measure from the top of the piston pin and you will see there is not much room left to work with.
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In my opinoin and J & Es opinion you can only raise the pin height about 5mm or so. If you go more than that the piston crown will be to thin. This can cause premature piston damage from to lean mixtures or detonation.
Now we feel if you only run one ring which is posible it can work but there will be some oil cunsumtion issues.
If you want to see what I am talking about get a SR piston and find 8mm on a ruler and measure from the top of the piston pin and you will see there is not much room left to work with.
Since I wrote this I found out JE/Crower makes pistons as low as 24mm compression height.
Since the stock height is ~31mm (thanks to BigToe for this info) and the 16ve rods are 8.5mm longer than DE/VE rods (i believe dre you said this a while ago) I would like to get a piston with a 4.5mm lower compression height and move the pin up 4mm and run 2 compression rings. Until I rip my motor apart I am just speculating how I can use the longer rod with the 86mm stroke
Since I wrote this I found out JE/Crower makes pistons as low as 24mm compression height.
Since the stock height is ~31mm (thanks to BigToe for this info) and the 16ve rods are 8.5mm longer than DE/VE rods (i believe dre you said this a while ago) I would like to get a piston with a 4.5mm lower compression height and move the pin up 4mm and run 2 compression rings. Until I rip my motor apart I am just speculating how I can use the longer rod with the 86mm stroke
I have 2 sets of GTiR rods laying around if you want em.... If my camera starts being nice i'll post comparison pics of the gtir vs DE rod...
If you have no idea why i would want to run 16ve rods then what is the point of your comments?
I do have somewhat of an idea why you want to run 16ve rods...I was just throwing that bit of information in there but apparently you wanted to be an ass about it If you didn't like my comment, be a bigger man and don't say anything than try to make me look like a fool. Instead send me a PM. Same applies to FastNX
16ve longer rods..right?
Longer rod equals more dwell time at TDC. It also allows more time to fill cylinders on the intake stroke which equals more torque.
From reading your previous post, as I understand..high revving is important to you but why rev so high if longer rods don't promote a good volumetric efficiency at low to moderate engine speeds due to reduced air flow velocity?
Why not run the shorter DE rods with a 89mm bore which give you approximately the same displacement, a better volumetric efficiency, and still allow you to rev to 8,5oo?
Wow, that's about half the replies in this thread from people who have no idea what they're talking about
So tell me how I have no idea what I'm talking about?
For ever 1mm overbore...doesn't displacement go up approximately .045 litres? So 3mm doesn't equal 2.135 litres?
You are a funny character...it is easy for you to point out any mis-information in this thread, but yet you are unable to put in your .02 because apparently, that is all you know.
Education is expensive, try ignorance
There is too much ego in this thread where someone was just trying to take in information and learn.
Why not run the shorter DE rods with a 89mm bore which give you approximately the same displacement, a better volumetric efficiency, and still allow you to rev to 8,5oo?
Because I don't want to. Please try to ad something to the discussion instead of trying to discuss something that's irrelevant to the discussion. Here's something you can help me with:
Do you have a turbo piston i could buy?
Do you know the strenght of the 16ve rod?
Have you build a motor with a custom compression height?
If you don't have imput into these 3 questions there is no need for you to be here
