Is it possible to bore out the VE's block that much?

Its 4valves/cyl and VI intake would really help out the higher rpm's flow and keep bottom end as well. That would make a pretty sick daily driver!

Just something to ponder....any body got a junk block to donate? near chicago or columbus,oh....


~Alex

 

What did Matt have his done to? I think he took it pretty close to the limit but I may be wrong. His thread is somewhere in the all motor section.

 

No he just got 10.5:1 pistons and rebuilt his engine. I think he wasnt all that thrilled with it.

~Alex

 

Im too lazy to go through that thread again, but if Im not mistaken, he mentions the limits of the block.

 

Upping the displacement that much purely by a rebore is probably not wise.

 

Thats why I want to get a junk VE block. Ive got a junk VG block to try but no money at the moment.

Matt were you trying to make me the genuie pig?

~Alex

 

Oh thats right, I forgot about that.

 

I'm not too thrilled because I didn't see IMMEDIATE gains...

After several months, I'm seeing little things that I didn't do that would probably gain a lot of power. i.e. ECU reflash... stock (small) injectors that sat for over a year in the dead engine play a huge factor.

I'm not sure what's the deal with this engine, but it should be good enough for 220+whp. it just doesn't do it. lots of factors involved.

And FYI, I bored it to 87.5mm using VG30DE NA pistons at a spec'd 10.5:1. based on the compression numbers, I'm guessing it's more like 11:1 in this engine.

 

i have a VE block in peices....... i have all of them too, but one of the rods broke.....it is yours if you come pick it up........ i WILL NOT SHIP OR MEET UP..... i am saying this because if i wanted to get rid of it, i caould get soem money for the block... but i am willing to give it up to you......Pm me if you are interested...

 

meh.. I have two dead blocks as well...

if someone wants to front the money for the machine work, I can take one of them to the shop and have them go over it and bore to maximum bore and then mail it to you.

 

Do you happen to know the specs on the variable valve timing? Reason I ask is some VH45 guys are noticing that the compression ratio isn't quite what its rated at, being 10.2:1. Some guys believe its somewhere around 9.5:1 from the timing. I believe it was a guy in NZ that said with a somewhat wild cam the thing would make about 400 hp N/A or so by bringing the compression back up and of course optimizing the lift, duration, overlap, etc. etc. yada yada.

I've not looked into it a whole lot yet so I don't know much on it, but I'm starting to wonder if maybe Nissan did this to a few more of their VTC engines. What do you think?

 

Static compression and dynamic compression are two different things. What exactly do you want to know?

 

Sounds like he/they want a solid cam or reduce the VTC angles to keep their dynamic compression ratio high. Thats all you can do really or just raise the static cr.

Matt- Know of any one near columbus with a blown VE? Ill try to find one locally.

Van- thats 1000 miles there and back, thats ok. Unless you want me to pay for shipping plus a little for your time its not worth it, and may not be worth it then.

~Alex

 

VTC works to keep your dynamic compression high at all engine speeds. Advanced in the mid-range to allow the intake valve to close earlier in the compression stroke and retarded in the top-end to keep the intake valve open longer in the stroke to take advantage of the intake charge's inertia.

 

Exactly... on the VH the dynamic compression is slightly lower which is why the guy in NZ got pretty large gains by increasing the dynamic compression and why, stock, the VH handles boost very, very well. I was curious if the VE was similar and if so, what kind of gains could be had from optimizing it.

 

The dynamic compression on the VH is slightly lower than what? Sounds like you are oversimplifying things a bit. What exactly is your question?

 

I was wondering where this thread went off too.

The intake valves close at 68 degrees after bdc on the VH, which seems like quite a bit, though I just searched for the VE's and the intake valves close at 69 degrees after bdc.

I'm still trying to find some more info on the VH but the dcr seems a little on the low side. Like I was mentioning before, someone got some very impressive gains just by doing the cams on the VH. Granted it has 1.5 liters more displacement and a couple extra cylinders than the VE, I'm just thinking there's a chance the VE could benefit the same.

I'm having a hard time finding info and even processing it though lately... I've been running on so little sleep ever since buying a donut shop that I hardly get to work on any of my cars anymore.