HELP VH45 in a S15 silvia... guides? inj? will it fit? swap 4 vh41?

[gdz1la]

i brougth a vh45 for a s15 it will be track only similar or same as s14 and s13 engine bays.. is it to big? i measure and it seams to of fit between rails but not sure about rack etc clearance

it has the simeise ports (36 intake ports out iof heads)i havent checked the guides, how do i tell if 94 or above?

if its got **** guides i might trade up for a 41, will this be easier to fit?

i removed the inj and damaged them, i didnt relise already 380cc, i now am insatlling ej20 subaru 380cc as the originals are damaged..

its rhd (New zealand)will the brake clutch cyl the steering rack etc clear? its turbo so ther manifolds will be floing forward, what other clearance issures are there?

the chassis has frontal damage so will be spaced framed froward of strut towers.. so alt and ps pump clearance not a issue

will be running z32 5speed and muiltiplate, link g2 engine managment (8channel fuel and ign) greddy t78 33d or t88 34d single turbo ill be aiming for 600hp (inj max out) will this be all good? i have run std rb30e bottom ends to that so 75hp/rod vs 100hp smaller rod should be a walk in the park..

im also missing 1 of the 2 vvt solinoids, can i simplt cap them or will it make more torque switching them if turbo? any one wana sell me one?
Modified by gdz1la at 8:39 PM 6/27/2006

[doctorchee]

i brougth a vh45 for a s15 it will be track only similar or same as s14 and s13 engine bays.. is it to big? i measure and it seams to of fit between rails but not sure about rack etc clearance

it has the simeise ports (36 intake ports out iof heads)i havent checked the guides, how do i tell if 94 or above?

if its got **** guides i might trade up for a 41, will this be easier to fit?

i removed the inj and damaged them, i didnt relise already 380cc, i now am insatlling ej20 subaru 380cc as the originals are damaged..

its rhd (New zealand)will the brake clutch cyl the steering rack etc clear? its turbo so ther manifolds will be floing forward, what other clearance issures are there?

the chassis has frontal damage so will be spaced framed froward of strut towers.. so alt and ps pump clearance not a issue

will be running z32 5speed and muiltiplate, link g2 engine managment (8channel fuel and ign) greddy t78 33d or t88 34d single turbo ill be aiming for 600hp (inj max out) will this be all good? i have run std rb30e bottom ends to that so 75hp/rod vs 100hp smaller rod should be a walk in the park..

im also missing 1 of the 2 vvt solinoids, can i simplt cap them or will it make more torque switching them if turbo? any one wana sell me one?

Hi I am doing a VH41 into 318is swap now also.

I have the oil sump clearance with cross member. I believe you will face the same problem.

The only solution for me is to let the engine sit higher a bit. This allows more place for exhaust manifold also. However, the engine will sit right out of the bonnet. I will have to think of a nice custom hood for the car.... keke...

I am thinking of twin turbo. turbo to be place in front also. however, the clearance between the exhaust outlet and strut tower is very min. so got to figure out a way. its very very tight.

At the moment, my engine is finding a good position to sit in the engine bay. next I will mate the engine with 350z manual transmission.

Once all things go well, turbo should come in next.

Hope it all goes well with your side.

For more photo, you can check out my "topic -BMW 318s VH41DEtt build up"

Good Luck

RegardsDerrick

[Mettler]

Oh hey dude, good move signing up to NICO, this is the most informative place on the net for VH V8 engine information.

The VH engine is front sumped, like an RB, and should have fine clearance over your crossmember and steering rack. If it doesn't, swap out the crossmember for an RB crossmember & you'll be fine... my VH41 sits perfectly in my engine bay, with the sump between the sway bar and the crossmember.

The 45 should fit fine judging by what I've seen of other VH45 into silvia transplants.

You need to pull the front covers off your motor to see if the timing chain guides are metal or plastic... you can buy the metal replacement ones brand new through Jim Wright Nissan, as they revised them. It's advisable you do this if you find them to be plastic.

Since yours has the siamesed intake ports, the heads won't flow quite as well as the later model VH45 or the VH41... it won't be as noticable since you plan to boost the motor, and may result in lower down torque for you... ideal if you want to drift it, however it'll limit your peak high RPM power. Not a big deal, you could still easily get 600hp+

Don't replace your injectors with subaru ones, go for SR20DET injectors... though if you want 600HP, definitely upgrade to NISMO 500cc+ injectors... factory 370ccs will only take about 500HP absolute max, and you always want a bit more leeway than maxing out injectors.

Your brake booster is going to be too big and interfere with the right head/rocker cover, get a smaller one. Certain Mitsubishi ones share the same pattern on their mounting studs, but the studs are too short. I'm using a mitsubishi colt brake booster (it's only single diaphragm, might need to find a dual one if it doesn't work too well), but it's tiny diameter and it fits.

As for the stud problem, your brake pedal is bolted to a plate/spacer, that spaces it around 20mm off the wirewall. The thread of the booster won't stick out far enough through this spacer in the footwell, so the plate and everything needs removing so it's just firewall with holes... and then the thread extenders are wound on to the brake booster studs, and the shoulders of the thread extenders are the same length dimension as the original pedal spacer plate was from the firewall.

Biggest clearance problem is clutch master cylinder. Find one that hardly sticks out, the guts of which are on the inside of the firewall... then chop and change the back of the rocker cover for clearance, and you should be ok.

As for single turbo, I'd advise twinturbo since it'd be less of a fabrication nightmare than trying to plumb two exhaust systems into one turbo.

Here on NICO, we've established that the VH V8 engine internals should be strong enough to push up to about 800-1000hp (with very good tuning to ensure there's no failure), at 600HP you'll be fine !

The link G2 will be a nice investment if you're running a MAP sensor, but if you're sticking with the factory MAF, then don't even bother. Socket your ECU, and program your own EEPROM... it's actually pretty easy, I can go over it with you if you're interested.

Hope this helps !

i brougth a vh45 for a s15 it will be track only similar or same as s14 and s13 engine bays.. is it to big? i measure and it seams to of fit between rails but not sure about rack etc clearance

it has the simeise ports (36 intake ports out iof heads)i havent checked the guides, how do i tell if 94 or above?

if its got **** guides i might trade up for a 41, will this be easier to fit?

i removed the inj and damaged them, i didnt relise already 380cc, i now am insatlling ej20 subaru 380cc as the originals are damaged..

its rhd (New zealand)will the brake clutch cyl the steering rack etc clear? its turbo so ther manifolds will be floing forward, what other clearance issures are there?

the chassis has frontal damage so will be spaced framed froward of strut towers.. so alt and ps pump clearance not a issue

will be running z32 5speed and muiltiplate, link g2 engine managment (8channel fuel and ign) greddy t78 33d or t88 34d single turbo ill be aiming for 600hp (inj max out) will this be all good? i have run std rb30e bottom ends to that so 75hp/rod vs 100hp smaller rod should be a walk in the park..

im also missing 1 of the 2 vvt solinoids, can i simplt cap them or will it make more torque switching them if turbo? any one wana sell me one?

[Ezekial]

S15's have bigger engine bay's than S12's. Mine fits so there is no reason why your's wont!

You will need the VVT if you are running big boost on unopened engine. keep it at 68 ABDC closing until engine efficiency starts to drop off

BTW 600 flywheel hp is a joke with that turbo. Get yourself some 850 cc injectors and make use of that big turbo

[defrag010]

The siamese port head is the one you want for the best flow. Each valve has its own undisturbed airpath, and will not have to split up once it is in the intake runner. The runner has a little bit smaller volume compared to a non-siamesed head, but the flow differences of siamese vs. non siamese are very much in favor of siamese. Take a look at the ports on a siamese head.

picture

Also, I wouldn't say we have established that the stock VH bottom end will withstand 1000 horsepower yet until we have some dyno sheets and verifiable proof - not just a claim and word of mouth.

[elwesso]

The siamese port head is the one you want for the best flow. Each valve has its own undisturbed airpath, and will not have to split up once it is in the intake runner. The runner has a little bit smaller volume compared to a non-siamesed head, but the flow differences of siamese vs. non siamese are very much in favor of siamese. Take a look at the ports on a siamese head.

Im not doubting you but do you have any proof?

Good thread guys....

[Mettler]

Also, I wouldn't say we have established that the stock VH bottom end will withstand 1000 horsepower yet until we have some dyno sheets and verifiable proof - not just a claim and word of mouth.

I'd say we've discussed it to being beyond reasonable doubt... Having heard of a number of 400-500HP SR20 engines around with stock rods and pistons, I think it's quite safe to assume the VH engine with its larger rods, could sustain such power. Obviously other upgrades would be required... running better coolant, additional oil pressure, better bearings etc. But I do agree with you, I would love to see someone doing this just to confirm it !

[gdz1la]

i can get top feed 630cc cheap as, has anyone adapted top feeds to the vh?any cheap dealers for 500-600 side feeds?

i need another vvt solinoid i only have one any one that can help?i will need a z32 adaptor whats the latest price?

[Ezekial]

use SARD or NISMO side feed's mate. $100 / injector brand new

John Dixon has the adapter plates. If you get stuck i am getting 2 made up in the next few weeks. Australia being a bit closer to NZ might save you some freight

i tend to agree with defrag regarding the siamesed intake runners being better ... purely because of air speed. However i think this is less relevant with turbocharged applications whereby their small size would become a restriction

Mettler ... exactly my point about HP. The radiator could be ALOT better in the Q45!!!! My car goes in monday week to get the new transmission mount and new tailshaft. Not too long for me now

[gdz1la]

is there cooling issues with the 45, i will be v mounting a 600*300*100 i/c above a custom rad, i hope i can design it so its efficent enought for drifting...

single turbo is much easier to plub, idd rather spend a extra hour linking the banks together than spending 3-6 hours making all the i/c pipes link not to mention twin thrttles, exh, etc i also have a few big turbos lying around from rb30dets (im a rb guru on the side)

i am flipping the std manifolds on cyl 3 5 7 and 4 6 8 and swapping the flanges over, that way i only need to link up cyl 1 & 2 to the manifolds, one bank will go under the alternator and upto turbo flange and one will go between ps pump and head, then to turbo flange ill have 2 v band flanges and a custom 2 into 1 pipe with external wasteagte, done.. then flow turbo stright into i/c and upto bov then the std throttle..

[Mettler]

No real cooling issues as such, other than the coils getting hot by being between the cam banks just like on an RB, easily solved.

However I do recall reading Q45tech mentioning that the cooling system in the heads isn't really designed to take more than about 700HP.

I think this could be overcome by replacing water as your coolant with some of that glucose based stuff, which has a better adhesion to the metal than water.

Q45tech knows his stuff, so I'd trust what he says regarding this matter.

[defrag010]

Im not doubting you but do you have any proof?

alot of time on the flowbench with heads of similar design (cosworth vega siamese port, and other "knife-edge" non-siamese port heads). I've been building heads since 2003.