turboing a L28???

[rochrd]

hi all
looking at turboing my mq, but dont want to spend too much, iv'e rebuilt

the motor 30,000k ago, it's reliable but want a bit more go.

Has anyone got any surrgestions!!!!!

its been bored and polished, extraters and exhurst (2 and half)

[mattstar]

there's alot of dollars in turbo'ing a carbie petrol motor, perhaps an efi conversion first?

[rochrd]

EFI how much? and will i get more power,

[mikesmith]

got a turbo on my mq still setting it up!! be prepared to spend a lot! prob about as much as the truck is worth to set it up rite with a good turbo and all.

[Artificial_Aspiration]

The easier and cheaper way to setup a turbo on a carby motor is to run straight lpg, replace the carby with a throttle body. Use a MSD 5462 Universal Boost Timing Master Box to take care of the ignition side of things. LPG is safter for turbo due to Higher octane. Bolt it all on and your done.

[chops]

if you can find one, grab the complete turbo system from a turbo 280zx - efi, wiring, turbo kit etc etc

[Beastmavster]

Straight gas turbo gets my vote. With electronic dizzy and a new cam

But yeah, you'll get way more power out of an EFI 280ZX donk (or 280C even) if you have to keep it on petrol.

280ZX donk is about 138kw (185hp), the standard L28 Carby MQ is 88kw. Biiiiiiiiiig difference.

[rochrd]

can u supercharge an L28?
just want more balls, i also heard u can get a diesil crank from the states and put it in which strokes it out to a 3.2 its bout $800 just for the crank!
just fishing around to which way too get more power.

[chops]

for a bit more power out of the old L, have a look at a bigger cam, some head work and maybe upgrade the carby to suit.. and definately go for some electronic ignition

[g@z]

I think a V8 conversion would be cheaper, but if I had the money I'd love to turbo mine too. I did speak with one bloke years ago that had a turbo L28 in a patrol, he said it had about 400HP and blew off a few WRXes and SS commorodes, back in the 5.0L days. The look on their faces was said to be good

Have a look here to see what stroking option you have. http://zhome.com/ZCMnL/tech/128combo.html

I think that the storking option is expensive as you're talking a rebuild, and a new set of pistons and maybe rods, then preping everything to make it stronger blah blah, then you need the right head and block too (I've got an f54 block with a P90A head on it, jap import if you want it)

Get an EFI engine and sitck a turbo on it and aftermarket computer, and I think you'll need the turbo injectors and also the turbo oil pump (has higher volume to cater for the turbo oil).

Would be cheaper to drop a V8 in it I think, or a ford 6.

Also looking to sell my MK that you can have as a project

hehehe.

Regards,
g@z.

[MARKx4]

I have a injected set up in my MK, it is great. There is alot more power then the carby and that is with 35s, i would love to see on on 31s it would be great. In sydney i used a place called SPORTS CLASSIC CARS, He would have injection and turbo set ups there and has reasonable prices. He is in western sydney, give him a call

SPORTCLASSIC CARS
Carlos Casmiri
1077 Castlereagh road
Castlereagh NSW 2749
Phone: 02 4776 1174
Mobile: 0418284776
E-mail sales@sportsclassis.com.au

[Beastmavster]

L series skylines also came in EFI so you can get parts of that, as well as the 280ZX and 280C.

Remember guys, L series have decades of racing history behind them, including factory turbos (L20 4 cyl and 6 cyl, and L28 6 cyl turbos). Plenty of datsun performance car workshops can get massive horsepower.


As far as the stroker option, it's a nissan diesel crank if you hadnt worked it out. Once you know that, you can get one MUCH MUCH cheaper yourself than buying off a Z workshop. Z workshops are usually at least twice as expensive as other sources.

As far as more cc's, big bore is the go. You should be able to go to 89 or 90mm. There are other piston options from toyota that are commonly used too, which mean you dont have to cut them. Search the web and you'll find what pistons I'm talking about (I've forgotten now since I havent owned a z for a few years).


Yes you can supercharge a L series 6. Your best option for doing this is probably a Soarer/Lexus superharged 6 cylinder supercharger.



Getting 400 HP out of a L28 is certainly possible, but getting 200rwhp would be ample for most people. Thats more than most V8s put out anyway, and you can acheive this for well under the cost of a v8 conversion.

[g@z]

I really doubt you could do a stroked turbo for less than a V8 conversion.

You're talking a full rebuild plus the cost of a bore increase, then there's getting a doner EFI setup, a new turbo or rebuild of a used one, turbo injectors, stroker crank, new set of pistons, oil pump, maybe a set of rods depending on what pistons you get, then machine shop time of prepping the block, and you should get the head done at the same time, then you have to find someone that knows how to modify the EFI setup to handle the turbo or get an after market computer, turbo manifolds made up etc. The parts will cost many thousands easy and the labour will be expensive.

V8 conversion would be cheaper and the engine would be less stressed and last longer.

However, I've got two books on the subject if anyone's interested, imported from the US many years ago when I wanted to do a turbo / stroker. "How to rebuild your Nissan & Datsun OHC engine" by Monroe and "How to modify your Nissan & Datsun OHC engine" by Honsowetz.

Regards,
g@z.

[Beastmavster]

I really doubt you could do a stroked turbo for less than a V8 conversion.

You're talking a full rebuild plus the cost of a bore increase, then there's getting a doner EFI setup, a new turbo or rebuild of a used one, turbo injectors, stroker crank, new set of pistons, oil pump, maybe a set of rods depending on what pistons you get, then machine shop time of prepping the block, and you should get the head done at the same time, then you have to find someone that knows how to modify the EFI setup to handle the turbo or get an after market computer, turbo manifolds made up etc. The parts will cost many thousands easy and the labour will be expensive.

V8 conversion would be cheaper and the engine would be less stressed and last longer.

However, I've got two books on the subject if anyone's interested, imported from the US many years ago when I wanted to do a turbo / stroker. "How to rebuild your Nissan & Datsun OHC engine" by Monroe and "How to modify your Nissan & Datsun OHC engine" by Honsowetz.

Regards,
g@z.

I doubt you could do a stroked turbo EFI for less, but I reckon you'd be able to turbo it for less, or stroke it for less, or bigbore it for less, or EFI it for less.

You're quoting prices for trying to do all 4 for cheaper than a v8 which you wont do. However, if you do all of that, you'd flog shit out of any V8 under a bigblock anyway, cos you're talking about a turbo EFI 3.2 litre 6.


Ask the v8 supercar guys if they'd like to compete their v8's against a turbo EFI 3.2 litre 6. They couldnt beat 2 litre turbos with v8's.......


You can probably do two of these things for less - turbo and EFI, or stroked and EFI for instance.

Given that he's already got a rebuilt overbored block, EFI and turbo sounds like a good next step.

[mikesmith]

lol the comparing the v8's to the 6's is a bit unfair at bathurst!!.

the skylines had 4wd which makes it a lot easier!.

and the sierra's were just freakey cars. but if u put a v8 in the same size car as the sierra who would win then???

not the best comparision i think.

v8 would be the best for a 4wd application cause of the torque would it not??

with a turbo car u have to get it onto boost which with intercoolers, piping and all that to fill up wont make it the torquiest thing out there.

but hey i am building a turbo l28 atm so i will let u all know how it goes.

i didnt want to pay for the engineers for a v8 or another engine for that matter.

just my thoughts!

[g@z]

Give us details!

I'd love to have one too.

Regards,
g@z.

[Beastmavster]

lol the comparing the v8's to the 6's is a bit unfair at bathurst!!.

the skylines had 4wd which makes it a lot easier!.

and the sierra's were just freakey cars. but if u put a v8 in the same size car as the sierra who would win then???

not the best comparision i think.

The skylines were in the end substantially heavier than the v8's due to the weight penalties they were given. Didnt stop them at all.

The sierra would 1) never weigh the same with a v8 as a 4 cylinder (the engine is just too big)

and

2) Would go slower. The limiting factor on the Ford Sierra Cosworths was the specified wheel and tyre combo being too narrow.

Sierra Cosworths could have been competitive with the skyline with wider tyres, but it wasnt allowed in the group A rules.

v8 would be the best for a 4wd application cause of the torque would it not??

I put up some figures on the (according to the v8 crowd) supposedly revvy, no torque skyline twin turbo. Suffice to say you can go find their torque figures and you'll see that the v8's dont have any noticable grunt increase.

The RB26DETT Z2 put out about 550nm..... substantially more than the current crop of high power HSV and Ford GT V8's.

That was from 2.8 litres, not 3.2 litres by the way.

The Nismo 400R (lets compare "tuned factory" FPV/HSV versus Nismo) put out 470nm

with a turbo car u have to get it onto boost which with intercoolers, piping and all that to fill up wont make it the torquiest thing out there.

but hey i am building a turbo l28 atm so i will let u all know how it goes.

i didnt want to pay for the engineers for a v8 or another engine for that matter.

just my thoughts!

All turbos, boost lag is dependant on many factors - the distance of the turbo away from exhaust ports, the size of the pipes, the size of the turbo etc. Matching them is an art and science.

There's certainly plenty of examples of turbos chosen for torque and fuel economy benefits rather than peak horsepower - any of the SAAB's, Audi A4 1.8's etc immediately come to mind.

In relatively low boost applications, where horsepower is not the end goal, you may be better off deliberately keeping a smaller turbo (eg T25/T28 sized turbo) and losing a few top end HP to keep a better low end torque curve and less lag. It's certainly what I'd do if I was turboing a L28 for offroad use.

Plus of course, there's heaps of turbos of this size kicking around at the wreckers on the cheap from those buying TRUST or similar for their WRX's....




What carbies are you going to use for the task? Proper sidedraughts or will you be adapting a downdraft?

[rochrd]

thanks heaps guys for all ur imput.
as for v8 thats out of the question, by time i buy motor, rebuild,install, labour, and parts plus engineers. too much time, effort, and cash.

im happy with my L28 and even thought im lucky enough to have a very rair p90 head on it, ideal for turboing, i think im gonna EFI it.

not expecting to blow away rexes but thats what ive got my GQ for.hehe
just want that bit more for overtaking trucks on fwy and enough getting round town. and save some fuel would be great.

thanks guys,,,, c u in the bush..........

[mikesmith]

hey gaz

will have pics and write up on this in the next week or 2. i am in process of fitting it all up atm.

[g@z]

hmm. let me know if you wouldn't mind an audience, I'm keen to see what's involved.

Regards,
g@z.

[mikesmith]

i am in melbourne. eastern suburbs.

i will take lots of progress pics.

umm i am going straight gas, gas research throttle body, front mount intercooler.

i had the manifold custom made to suit my turbo which is a garret gt 25\40 ball bearing.

[g@z]

I'm in Wantirna

Regards,
g@z.

[Beastmavster]

GT 25 hybrid sounds the goods. Straight gas > EFI - no issues with compliance and cheaper to run, allows higher boost (approx 114 octane equivalent).

Just means no trips around australia any time soon....