Thats pretty cool, I'd like to see that sometime if possible. Are you going to dyno it illustrate the potential gains?

 

Yeah but the tensioner has a limit of how much slack it can take out. The tensioner can only move so far. Like I previously stated, I bought a reman head for a Mazda B2200 last year. The head was .006" beyond spec for resurfacing and the tensioner would not pull up the slack so the company had to send me another head. If you were able to properly tension the belt (which I don't you could with that much material removed) then you have the timing issue.

 

I had JWT modify my VE block for the VG30DE piston squirters, They work like a champ, just be sure not to use the VG30DETT squirters unless your using the matching pistons.

 

the tensioner on the VG has quite a bit of room to go assuming you're using a new OE belt.

 

I have the VE30DE longblock done and am getting the old engine ready to come out of the car. Depending on the weather and work etc. I hope to have it running this week. I will say that the engine turns fine on the stand with no clearance issues whatsover. I think that the VG30DE and VE30DE chambers are identical although I don't have the 2 side by side to compare and I have not CC'd the chambers on either. I have taken a lot of pics and I will post some soon. A lot of the pics were to document the work that I have done. I also took some side by side of the 2 different pistons. I may start another thread with a detailed list of the current mods and potential future ones maybe to get feedback from all of you guys. I bought the car not running so all of the current mods are happening at once.

 

The Mazda has a lot of range on the tensioner too but it still did not make up the difference. I intially tried 3 different brands of T-belts including OEM and none of them worked. That's when I had my local machine shop take measurements on the head to find that it was overworked. The VG30 may be more forgiving than the Mazda was but I would not waste a good pair of heads trying to find out. You would also have to consider that if you take away the timing and belt tension factors that removing that much material may have adverse affects on cooling and/or structural integrity as well. The FSM specs for resurfacing probably lean on the side of caution but you can only go so far out of spec. I think the bottom line for this topic is that one way another if you remove too much material from a head you are going to run into big problems.

 

yeah, I definitely agree with you there. should be plenty of room in the belt and tensioner, but the other issues are what make it not doable..

I'd definitely like to see what you've got concocted for the VE... that's the project as soon as I get the money.

 

Might as well do some turbo measurements so you can have everything ready to go once you get that thar VE runnin well.

 

Actually, a guy from Z31.com made some a while back. I'm not sure if he's still making them or not though.

 

Repeat: there is NO such engine as VG30DE ...at least by Nissan FSM.

 

Yes there is a VG30DE but its in a Z32.. With 10.5:1.. That is what they are refering too

 

Then why not mix Volvo B20 rear exhaust bearings in this thread w/o being explicit.

 

It is a VG30DETT......z32

 

I bet my helmet. THAT was not the engine how this thread started. All is market-bs if ppl cannot understand enough to specify explicitly.

Another thing missing: pics, with measured pistons showing differences, not in BMW'S, but 3gen vehicles.

 

The Z32 (90-96 300zx) had the VG30DE (non-turbo) and the VG30DETT (turbo)

 

Hi bradsm87

Have u got Z32?

---> " How much to shave off VG heads to get 10:1 Compression? ..."

 

Wiking, We were reffering to adding VG30DE pistons to the VE30DE to raise the compression ratio to 10.5:1. It was not referring to bradsman87 but to people interested in raising compression in their VE car. BTW...referring to the Volvo B20, I have owned 3 vintage Volvos.

 

bradsm87: If you still have the heads off the car, you should consider upgrading the exhaust studs to avoid the breakage problem later on. See my post at the bottom of this thread. http://forums.maxima.org/showthread.php?t=435603

 

Thanks. Alot of known issues have been covered here. Let me know if you want to add to this sticky
http://forums.maxima.org/showthread.php?t=128490

 

Still the facts missing for VG30E.
- Exact minimum VG30E head height beyond FSM (=max shave)
- piston critical measures; possibilities to raise VG30E pressure
- rod critical measures; possibilities to raise VG30E pressure
- gasket critical thickness; possibilities to raise VG30E pressure

Notes:
- Manually adjusted valve angles vary tis way tat way lots of degrees. Driver cannot see any difference on produced degr fractions this shavin produces.
- Belt slack is non issue in maximaV6, Mazda >another forum.

Open VG30E issue = nobody here can deliver measured facts (but opinions):
b/c of head shape cc [THKS Mtcookson!], seems that VE30DE piston will not give any gains to VG30E, no other options known. Seems no practical way to raise VG30E pressure.

 

after doing some searching around it looks like most of the piston manufacturers claim 49.5 cc's for the DE(TT) heads.

still searching around for some more info on the VG30E

 

Those who have got THE heads, its very easy to verify: plastic film on head hollow as valves sit closed - pour in water. Then measure the water cc.

 

Mazda is another forum but I used the example to show what can potentially happen. I don't think people realize what a few thousandths difference can make. I have a set of VG30E heads I can dig out and CC when I get the time. I personally would not use (opinion) a VG30DE piston in a VG30E because it is a "fact" that those 2 heads have different chamber designs. It is a "fact" that most pistons are made to be compatible with the chamber they will be working with. There are companies out there that will make any piston you want if they don't have it in their invetory but you will pay.

 

Jeff, were you asking me to add to the sticky?

 

BRC will make custom pistons for a pretty good price. I know a while back some Z31 guys were saying they can be done for the $550 range or so. Not sure if the prices are any different or not now. http://www.brcperformance.com/

 

Grace_Imports: So? How is the project?

 

I have been driving it for a week...I will update the thread I started about the project. Look for "VE30DE build details" I'm no forum whiz so I don't know how to link it to this one.