VH50DETT ive been playing with

[carfrk666]

So i figured i would reveal what ive been playing with for the past year, i started out with a 92' VH45DE, the engine will be twin turbo and is 10mm oversize, stock stroke. heres some pictures of what ive done so far.


http://i998.photobucket.com/albums/af10 ... to0051.jpg
This is the deck before i welded all the coolant passages up.


http://i998.photobucket.com/albums/af10 ... to0052.jpg
This is after i welded the coolant passages up. the reason for doing this is to strengthen the deck up and drill and relocate the holes away from the cylinder sleeves that are going in.


http://i998.photobucket.com/albums/af10 ... to0068.jpg
i milled down the main regesters and installed Time Sert inserts into the mains so the threads wont pull out under torque.


http://i998.photobucket.com/albums/af10 ... to0118.jpg
I milled out a new main girdle thats thicker and bolts down to all the mains not just 1,2,3,5


http://i998.photobucket.com/albums/af10 ... to0069.jpg
This is the girdle installed with the ARP studs


http://i998.photobucket.com/albums/af10 ... to0108.jpg
i started sleeving the block for 10mm larger pistons. (ill have more images early this week, i just dont have them right now)

This is what ive got so far, lots of work to come.

[hellbilly66]

NICE!

im in the blueprinting stage of making my own main girdle for a vk56. any chance you can post some specs of your main studs? part#, thread size/pitch and length. id like to see if they would work for me. also are you using wet sleeves or can you get away with dry sleeves on that block?

[Bart]

Very nice work mate
Is the girdle 4 or 6 bolt?
Did you have to replace the sleeves to bore it out?
Just my 2 cents, perhaps you could have made the girdle and sump one piece?

[Yellow4g63]

So i figured i would reveal what ive been playing with for the past year, i started out with a 92' VH45DE, the engine will be twin turbo and is 10mm oversize, stock stroke. heres some pictures of what ive done so far.


This is the deck before i welded all the coolant passages up.


This is after i welded the coolant passages up. the reason for doing this is to strengthen the deck up and drill and relocate the holes away from the cylinder sleeves that are going in.


http://i998.photobucket.com/albums/af10 ... to0068.jpg
i milled down the main regesters and installed Time Sert inserts into the mains so the threads wont pull out under torque.


I milled out a new main girdle thats thicker and bolts down to all the mains not just 1,2,3,5


This is the girdle installed with the ARP studs


i started sleeving the block for 10mm larger pistons. (ill have more images early this week, i just dont have them right now)

This is what ive got so far, lots of work to come.

[carfrk666]

Hillbilly- The main studs are ARP 2000 material which is the stiffer material so keep in mind the torque specs needed. however all i did was call ARP tech and tell them the length and thread and they will find something for you, its quite painless actually, they are nice people there. Im installing dry sleeves (the biggest i could stuff in there) the next one ill be building will be a wet sleeve but for now just dry.

Bart- the girdle is still a 4 bolt but the mains are the 6 bolt from the sides. The stock casted in sleeves are actually only about 0.080" -0.100" thick so it all had to come out. the original aluminum wall left after boring is about 0.060" thick but with how thick the sleeve is it doesnt really matter. i was thinking about doing a billet pan and girdle in one piece but im not set up for it at this point in time so i opted to weld a dry sump pan after because i dont have a car to put it in yet and still are unsure what im gunna put it into, either a S14 or a 350z


EDIT: Hellbilly66 not hillbilly, sorry about that man

[hellbilly66]

thanks for the info.

[klh6686]

Looks like some awesome work and some serious engineering going on in here! Looking forward to seeing more of your work!

[LEMHEAD16]

You are my new hero. What will this be going in?

[klh6686]

You are my new hero. What will this be going in?

a couple posts back he said:
i dont have a car to put it in yet and still are unsure what im gunna put it into, either a S14 or a 350z

[carfrk666]

so i got a few more pics today, later this week ill be cutting the deck and then im sending it out to my buddys shop to align bore the mains so i wont be seeing it for a little bit.

http://i998.photobucket.com/albums/af10 ... to0113.jpg


http://i998.photobucket.com/albums/af10 ... to0112.jpg



http://i998.photobucket.com/albums/af10 ... to0111.jpg

This is another reason for welding all the collant passages for now, u can see in the countersink that it opened into the coolant passages

Yellow4g63 thanks for puttin up the pictures, not the best with posting them

[hellbilly66]

nice work on the sleeves, i might have to send my vk to you when im ready for sleeves.

[Bart]

So will you redrill the coolant passages or find another route to cool the heads?
And did this VH model have a girdle originally or was it the VH model without an original factory girdle as the Japanese spec had a factory girdle.
Keep the pics coming this is a great thread.

[LEMHEAD16]

You are my new hero. What will this be going in?

a couple posts back he said:
i dont have a car to put it in yet and still are unsure what im gunna put it into, either a S14 or a 350z

i saw that after I logged out. My bad!

I'll volunteer my S13, if I can keep it.

Plans on twins or single turbo.

[carfrk666]

So will you redrill the coolant passages or find another route to cool the heads?
And did this VH model have a girdle originally or was it the VH model without an original factory girdle as the Japanese spec had a factory girdle.
Keep the pics coming this is a great thread.

im going to redrill the coolant holes out more away from the cylinders to prevent cracking between and when i have the gasket made ill just have them do the same, this VH had a factory girdle but they miss the 12mm on #4 main and its way too flimsy, infact all VH's that ive seen have had them, i didnt know that there was some without.

[Bart]

So will you redrill the coolant passages or find another route to cool the heads?
And did this VH model have a girdle originally or was it the VH model without an original factory girdle as the Japanese spec had a factory girdle.
Keep the pics coming this is a great thread.

im going to redrill the coolant holes out more away from the cylinders to prevent cracking between and when i have the gasket made ill just have them do the same, this VH had a factory girdle but they miss the 12mm on #4 main and its way too flimsy, infact all VH's that ive seen have had them, i didnt know that there was some without.

Would a 4340 high tensile steel girdle have been a better option?

[carfrk666]

well the problem with steel is that A. the high tensile steel is pretty hard to cut unlike mild steel, B. its alot heavyer then aluminum C. the expansion rates are different between steel and aluminum and sence its an aluminum block you need the girdle to expand the same as it or else the mains will seem to be pulling inward when the block expands outward in a front to back motion

[Bart]

well the problem with steel is that A. the high tensile steel is pretty hard to cut unlike mild steel, B. its alot heavyer then aluminum C. the expansion rates are different between steel and aluminum and sence its an aluminum block you need the girdle to expand the same as it or else the mains will seem to be pulling inward when the block expands outward in a front to back motion

Very good points
Do you think the amount of the material you have bored will reduce the rigidity of the block?
Keeping an eye on your build, keep up the great work

[David Steele]

im going to redrill the coolant holes out more away from the cylinders to prevent cracking between and when i have the gasket made ill just have them do the same, this VH had a factory girdle but they miss the 12mm on #4 main and its way too flimsy, infact all VH's that ive seen have had them, i didnt know that there was some without.

Where have you seen this engine crack?
There are already bored out VH's / resleeve much highpower power level's and haven't cracked.

To the other member:
I've never seen a VH come without a Girdle.

Re tapping the mains on this V8 why do you practice this? It seems like you only did it to match the ARP stud?

Also, I feel your reasoning is flawed on the expansion rates because the girdle is bolted to STEEL mains caps.

[carfrk666]

with how big of a flange i put on the sleeve i got so close to the coolant passages that it very well might, its a preventative mesaure.

i didnt retap the mains, i installed TIme Serts witch is a carbon steel solid insert that is put in so that when the mains are torqued down the threads dont pull out so i may increase the torque and hold the bottme end together better,

the reason for expansion rates isnt flawed, you just cant read, its not that its expanding downward, blocks expand mostly front to back, main caps dont prohibit that, a girdle will, infact thats the reason for havingn a girdle, to limit the amount of moving that the mains will do. if you add a steel girldle it will be too rigid

[kingkilburn]

When was the last or even first time you have ever heard of a VH block failing structurally?


I think you may be wasting your time and money focusing on the wrong parts of the block. I would be a hell of a lot more worried about oil drain back and general flow than structural weaknesses.

[carfrk666]

i dont feel like being the first one to have it happen, gunna put a lot of boost to it and want it to hold, as far as oiling ill be taking care of that when i do the dry sump

[DRFTBLD]

Great build!! Diff be watching this!

As for the car go with the S14.... Live the S chassis and the fitment is way better especially with the TT set up.

[David Steele]

i didnt retap the mains, i installed TIme Serts witch is a carbon steel solid insert that is put in so that when the mains are torqued down the threads dont pull out so i may increase the torque and hold the bottme end together better,

YOU ARE RETAPPING you bored out the hole threaded it and added a timesert.

What is a Timesert?
A timesert is a sleeve with a threaded OD it still has to thread into an aluminum block in the end so where are you getting your benefit from you now have less material (aluminum) and you are playing with different expansion rates by adding another dissimilar material.

Aluminum grows quicker.

the reason for expansion rates isnt flawed, you just cant read, its not that its expanding downward, blocks expand mostly front to back, main caps dont prohibit that, a girdle will, infact thats the reason for havingn a girdle, to limit the amount of moving that the mains will do. if you add a steel girldle it will be too rigid

Expanding? I think the distortion of 8 cylinder power pulses are of greater concern.

I can't read? You're acting like you've done some testing with greater ability than Nissan Motor Co testing labs . You're too busy changing things on the block that don't need it. Years ago the first twin turbo boat using a VH45De did it with complete stock parts, boat run constant RPM that don't vary much he didnt run into such issue.

Jeff Taylor is doing 680whp on E85 he's still using a factory internal e ngine!

This block doesn't need some of the touching up you're doing, I'm 100% sure you haven't brought the limits out on this engine to be justifying this, your retapping wasn't such a good idea. The girdle is a good move with the upgraded studs.

[silv8]

Now now kids lets not F@#k up another perfectly good thread by putting in your point of veiws and 2 cents worth.
If this is what this guy wants to do let him, he is doing you a favor by sharing his Tried and PROVEN methods its at his expense not yours.
There are to many people that talk s*** on forums about Vh45s and very few who are willing to show PROVEN built engines.
Now if you have any positive input into what this guy is doing let him know, if not go talk bullsh!t else where.
Do you really think that Jeff taylors engine is unopened? And where are all these other big horse powered Vh45s?

Good effort on sharing you build mate. I hope you dont get discouraged by these little d!ck Cun75

[DRFTBLD]

Now now kids lets not F@#k up another perfectly good thread by putting in your point of veiws and 2 cents worth.
If this is what this guy wants to do let him, he is doing you a favor by sharing his Tried and PROVEN methods its at his expense not yours.
There are to many people that talk s*** on forums about Vh45s and very few who are willing to show PROVEN built engines.
Now if you have any positive input into what this guy is doing let him know, if not go talk bullsh!t else where.
Do you really think that Jeff taylors engine is unopened? And where are all these other big horse powered Vh45s?

Good effort on sharing you build mate. I hope you dont get discouraged by these little d*** Cun75

PERFECTLY SAID!!!!!!!!

[carfrk666]

Thanks for the supprt Silv8, i really dont want this thread to be an argueing one, i do however enjoy everyones input on matters because it always helps to see someone elses perspective and throw some ideas back and forth. However i rather dont like someone telling me that im blatanly wrong. To David and Kingkillburn, perhaps we got off on the wrong foot, and for that i appalogize, i am however an engine machinist and have built quite a few engines and have spent alot of time thinking about how i want to go about this engine and i am doing it exactly how i want to. afterall it is mine.

Now onto a better subject, if someone had a good sugjestion of where i can get some nissan type piston oil squirters at a decent price that would be appricatied

[kingkilburn]

Now now kids lets not F@#k up another perfectly good thread by putting in your point of veiws and 2 cents worth.
If this is what this guy wants to do let him, he is doing you a favor by sharing his Tried and PROVEN methods its at his expense not yours.
There are to many people that talk s*** on forums about Vh45s and very few who are willing to show PROVEN built engines.
Now if you have any positive input into what this guy is doing let him know, if not go talk bullsh!t else where.
Do you really think that Jeff taylors engine is unopened? And where are all these other big horse powered Vh45s?

Good effort on sharing you build mate. I hope you dont get discouraged by these little d*** Cun75

Go be condescending somewhere else.



@ OP I wouldn't say you are wrong in your modifications, just that maybe you are spending money in places that don't necessarily need it. As has been said people have been running crazy rpms and horsepower out of mostly stock VHs for years.

The money you have spent would have gone to cams, springs, and dry sump if it were my engine/money. A cast pan for the dry sump would have taken care of your beefed up girdle at the same time.

[Pdfflyer001]

i like this thread and I do enjoy everyones input on matters because it always helps to see someone elses perspective and throw some ideas back and forth. i have spent alot of time thinking about how i want to go about this engine and i am doing it exactly how i want to. afterall it is mine.
CarFrk666,
Now onto another subject, do you have a good suggestion of where i can get some nissan DOHC Heads that will mount onto to a Z31 VG30ET Turbo engine? Or, how to go about that welding and re-machining of heads/ block ?
Pdfflyer

[hellbilly66]

Now onto a better subject, if someone had a good sugjestion of where i can get some nissan type piston oil squirters at a decent price that would be appricatied

these might be able to work for you. their in the new ford 5.0

[kingkilburn]

Gotta love simple ingenuity. I wonder if that would work on the VH.