hi all. im going to go mad with my manual over the winter and next summer and as im going to try to make it a bit of a monster i'd like all your opinions on what internals to use (best, strongest, best value, etc).

i'd quite like a stroker engine but i'll settle for a stock size that'll take HUGE boost.

dont care at all about lag, etc. i got an auto for knocking round in now so im going silly with my other one.

im looking at a single turbo conversion (dont laugh, i've thought it out and made the enquiries - it CAN be done) or 2 big ones.

also, i want it to be able to rev higher (even if i have to have the boost trail off) as this will help with keeping the big turbo/s spinning.

im going to need some pretty tough internals to cope with it and since thats the first part of the engine that will need building, thats first.

all help, comments, suggestions i'll be greatful for.

not bothered if it takes a year or 2 to build. i got a spare Z so i just want this one to be the best i can make it for me.

oh, and i can get what i think is a very good price on a HKS T51R SPL so that may be the turbo of choice.

thanks in advance.

si.

Tomei internals are probably the best way to go...

 

As for single turbo, I don't think you'll get as much benefit with the engine being a V. The exhaust pipework is so long you lose some of the energy before it reaches the turbo...

cheers andy. if i dont go for a single it'll be 2 very big ones that'll have to be mounted in a different place anyway (probably higher up and more toward the front) so would they still be better than a single? im not that fussed as long as i can get a huge ammount of boost out of them. the other thing is cost. i can get the T51R for £1300 new but for say 2x T68's im looking over 2k. also, with the one, i only have to have a 3-2-1 exhaust manifold made then the rest is all singular (boost pipes, intercooler, intake manifold, etc) also saves money but importantly in a cramped Z, space. (2x boost pipes, intercoolers, cooler-intake pipes, etc take up more room). i must admit that, at first, i wanted to keep it TT partly to keep the spirit of the engine and i was worried about response, etc. totally agree with you about the longer pipe being bad but where the engine is and how small the car is, you're really limited to turbo choice in the standard mounting place. 20G's make a really fast Z but there are a few VG30's making well over 1000bhp in other applications where turbo space isn't limited. im not after that much (though it'd be nice) but i'd really like to get over 800bhp. oh, and im on about wheel power, not BS power. i'll probably be using a porsche transaxle to take the brunt but we're also toying with the idea of a viper 'box 'cause i like the 6-speed idea. i've seen too many skyline posts saying "i killed my g.box", etc or i'd use one of them. still in the planning stage after 8 months. lol

cheers.

si.

If you junk the AC and PAS then there'll be plenty of room for a pair of monsters in there lol. Wonder if it would be possible to chop the front end off and rebuild it with a 'space frame' design. You would end up with a lot more room then... Going to single intake creates its own problems - one being height. You can't really lose the lower intake as it carries the stud for the upper cambelt idler pulley :( I'd have thought twin pipework would actually be better with the space restraints also, due to the fact that each pipe will be much smaller diameter. I know there are some single turbo setups out there but they don't really seem to be that impressive for the spec. I'll have a look at some flow charts and see if single or twin is the most practical for you if you want. Of course, a single turbo'd VG30 would be pretty unique so you get my vote on that side of things :D

cheers mate. i'd quite like a big single too. as you say it'd be a bit unique on a Z and i'd really like to keep the PAS/aircon (when its getting big power its gonna get HOT in that cabin and i dont want to struggle to turn it).

I'd be eternally greatful if you could look it up for me as flow charts just go straight over my head in a big way.

i dont really care if its s#@t round town or if it doesnt wake up properly untill 5krpm. to me thats fun. i know most people would see it as overkill and a pain in the ass but thats what im after. loads of lag, massive boost pressure and a car thats almost dangerous to drive. thats why i ride big bikes instead of having 600/750cc class bikes that are usually faster. the big one's always more fun and i dont care if i get overtaken by people with far less power. im not out to prove a point lol. thats for sad people. lets face it, if you just want ultimate speed, you wouldnt really go for a Z in the first place as there are lots of lighter, more powerful cars that are easier to get silly power from these days. i just really like the way they drive and now i want a real b1tc# of an engine to make it scare me. lol

i'd like it to rev to about 8.5k too, even if the boost has to tail off after 7k, just so when i change gear its back in the power bulge again.

skyline's have been doing this for 10 years now from less cc's and i think the Z deserves some big power cars too.

i know it'll spin the wwheels when it boosts and i know it'll be undriveable but i really dont care. lol

can you have a look at the flow chart for the HKS T51R for me, especially, please? i think £1300 for one of those is a bargain.

dont forget, it wont be running standard RPM so 3000cc between 4.5 and 8.5krpm would be nice.

cheers in advance mate.

si.

hks made a kit for the z32 comprising of a single turbo .you can find a picture of it on http://www.ooparts-international.com.the car had 900rwhp.the turbo sat in front of the altenator and is the size of new mexico!!.

hks made a kit for the z32 comprising of a single turbo .you can find a picture of it on http://www.ooparts-international.com.the car had 900rwhp.the turbo sat in front of the altenator and is the size of new mexico!!.

 

I'm pretty sure HKS have never developed anything like that for the 300zx, i know jun and blitz have done 300zx's, ive only seen 2 singles and as andy says they didnt work that well, its not overly difficult, all you need is a greddy type log manifold with a feeder pipe to the passenger side one with a flange taking the single to where the A/C used to be.

 

Mike

cant get that link to work. keeps saying server not found. i've never seen a single turbo'd Z TBH but i'd like to. and i dont think of lag as a problem, more waiting for the fun.

cheers.

si.

Just remove the word "the" of the end of his link after .com, then it will work :)

smithy

I know of one using a single gt45 that got 423bhp on 10psi when running in, dont know what he's up to now, but that was on his 5th engine!

cheers smithy. got it working now. mowgs: have you got any pictures?

si.

http://www.z32power.com ;)

Some more pics here http://s89053294.onlinehome.us/gallery/joel/

Hows about twin GT30R's? 752CFM each :eek: Thats a LOT of power lol

here's another single, but slightly different approach:

 

 

 

Although I won't mention the fact that it probably needs to have the melted timingbelt replaced after every run or so :D

can you get GT30R's in? and how much will i be likely to get them for?

si.

http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=GRT-TBO-005&Category_Code=GRT

 

prob looking at around £800 each and should bolt upto the escort front manifolds with a little work

 

good for 500-550 RWHP each!! so a true 1000+ BPH setup ;)

hmm..... quite like the look of them. im still not sure though. where do you get escort manifolds and roughly how much are they gonna kill me for? :)

si.

http://www.amzperformance.com does escort stuff ;) Not the cheapest but IMO deffo the best

nice one for that. good link there. some very nice stuff. will the escort manifolds support the twin gt30R's then or will i still need to lose the aircon, etc?

si.

If i was looking for big power i would junk the vg engine and fit a rb26dett engine and fit a single turbo to that.The RB series engines seem to be more known by tuners .Lots of jap tuners seem to keep clear of vg engines as they know nothing about them or there limits .

i did think about this but i think after you've taken the cost of the engine, all the anciliaries, ECU, etc, one off mounts, and all the stuff under the bonnet you'd have to change then it becomes a VERY expensive option.

then you have the problems of will it actually go in under the bonnet (longer and taller than a VG) and more front and higher up weight it would probably be a strange looking and handling thing.

then you still have to do the same tuning to it and every big power RB i've seen has been stroked which brings a lot more cost into it.

all in all i think its probably more cost-effective to stick with the VG and tune the hell out of it.

and for a better engine swap i'd go for the chevy small block V8 with a huge blower on it. better weight distribution than the RB, more power potential and a hell of a lot more torque.

jap tuners tend to steer clear of the VG more because its harder to get to the engine to do the development work rather than it being harder to work on/etc.

a skyline GTR is a big car with a lot of room in its engine bay so its easy to work on the engine. if the VG had gone into the skyline i think it could have been a better car.

always wandered why they stuck with the RB when they had the VG about. i came to the conclusion that either the RB was already in the car so they just developed it or the VG couldnt meet the stricter emmissions regs? anyone know?

si.

I wouldn't go for the Chevy motor but a VH series. The F1 theory of "if you can't make a bigger bang then make more of them" is a good one. RPM's go along way to overall power and getting a Chev motor to rev as hard as a VH would cost a bit. Just my 2 cents (pennies) worth.

You could just buy my engine and turbo kit ;) 800++ RWHP setup with an engine which is guaranteed for 1000RWHP+

 

Save yourself some money and time as its all ready LOL

 

Mike

sounds good, Kirbz but i need to spend the money and time together. the missis wont let me go spend a big bang ammount on it so i have to drag it out as its not due to be ready untill next summer-ish.

also, i already have a spare engine that i brought to build up (off Leigh) so i'd have to re-sell that, etc too.

just from interest though, how much would you be after for it (i read the VERY nice spec list) and is there still room for bigger turbo's or would i have to re-locate them anyway?

cheers.

si.

also, what con-rods, oil and water pumps are you running please?

si.

sounds good, Kirbz but i need to spend the money and time together. the missis wont let me go spend a big bang ammount on it so i have to drag it out as its not due to be ready untill next summer-ish.

also, i already have a spare engine that i brought to build up (off Leigh) so i'd have to re-sell that, etc too.

just from interest though, how much would you be after for it (i read the VERY nice spec list) and is there still room for bigger turbo's or would i have to re-locate them anyway?

cheers.

si.

 

20g's are about as big as your gonna get in the stock position but it makes it easier with them there, moving them turbos to the front will give you more rookm for bigger turbos but means your into getting alot of custom stuff done to the rest like rad, intercooler, PAS, Alt etc etc

 

Do what i do explain its gonna cost you over 10 grand to put together a monster build or i can save money buying kirbz's setup ;)

 

Mike