It's funny i have done a few head gaskets on tb42,s in the past various k's 250 350 and 400 The bores all looked perfect no lip i was surprised.
Pulled down quite a few chevs holden v8's with less k's and seen lips on one half of the bore that deep it wasn't funny.
Tb42 over gm junk any day i say.
Another thing i notice is that their are always gm junk patrols for sale seems like they fit one waste a lot of money spoil a good reliable car and can't wait to flog it off.
WT heck, someone quoted a price for something I have no intention of doing anyway, and I replied more like a larger figure 12k as I would not be using 2nd hand parts even if I entertained that idea, and bugger me I'm suddenly quoted as saying I have posted a budget of 12k.
I tried to play nice and explain why I'm not going down that path and blow me down that's just not good enough.
try to research info on what's the go with improving a particular engine and info on doing something entirely different flows in, why.
And to be fair some useful info did post up and Thank-you very much for that.
I notice I'm not the only person who posted a thread of this nature and got something else in reply.
but someone out there, insists I do it his way.
not going to stick a v8 in my car reguardless of what it may cost so leave it be.
what was the reason the gen 1 engine used 1 litre of oil between changes, hummm let me think, it was their own accepted build quality wasn't it.
IF IT'S NOT A NISSAN.
THEN IT'S A COMPROMISE
It's all good mate, that's what happens with the flow of a thread as people weigh in various points and opinions regarding which way to go - without conjecture and opinion, you'd never end up with "all the info" as it were. No one is suggesting the $4k figure mentioned earlier, no one is suggesting you spend $12k as mentioned yesterday etc, but there has been plenty of effort and time gone in by a few members to respond to make sure you are aware of possible alternatives, varying price ranges, various pitfalls of each, and potential outcomes of performance - from there hopefully some relevant information that'll assist you in the decision.Originally Posted by Robo
I've edited your last post (just the parting comment) as there is no need for it mate, misguided or misinterpreting in your perception or otherwise, people were trying to assist and spent a fair bit of time typing up responses (like this one) with no intent of offending or misquoting you. That's just the way conversations flow sometimes, but usually for the best final outcome.
Sooooo ... what's your thinking to this point? Exhaust, extractors, turbo, intercooler, cam shafts, decompression, etc, etc??? Any of the above??? You won't regret a bit of love on the TB42 and the best thing is, you can stage it so as budget is less of a factor (I.e. do say the exhaust and extractors now and then sit on them whilst you consider the next step; then maybe the turbo alone at low boost; then maybe an intercooler; then maybe some engine work such as decompression, cam shaft, etc; and it just goes on from there).
Fully appreciate the fact you went out of your way to thank those who responded in line with your post also.
Ahhhh, written forms of medium ... aren't they grand!!!! lol
taslucas (25th February 2012)
Well Bigrig alls good.just tired of getting no where fast.
Yes I am thinking turbo cam etc but no one seems to know what goes with and what to avoid when you do this etc.
For instance which garret turbo does what, with this trim spec, and or that manifold and weather or not to use twin pipe dump or just a single pipe dump with a 2 3/4 mandrel xforce system part No.
which size carby & model-brand or stick with oem to go with as a result of, or install gen efi with a particular piggy back computer & cam and a GT38-### turbo will achieve approx-------nm, and so on.
but to be blunt so far I have very little.
I'm dissapointed and frustrated as it seems no one is willing to pass on such advise.
I thought this sort of info would come in from all direction but in reality, didn't at all.
Well, l 'll stand by fingers crossed.
PS, Been watchin your build,and if I get time I'll try a decifer what you have now.
Cheers Bigrig
I gave what I knew mate below - copied again here:
Garret imitation turbo (will get a ball bearing garret down the track)
Standard TD42 manifold
XR6 Turbo Intercooler - front mounted
3" dump pipe/2.75" exhaust mandrel bent no cat
Single dump pipe
Wolf V500 ECU
Bosch 660cc injectors (high performance and larger - have to be)
Wallbro high performance fuel pump
Wholesale Automatic stage II heavy duty valve body
If you're after something that will add some spice to the engine, that list is pretty much it, short of a boost controller .. you don't need the intercooler if only running 6 or 7 lbs of boost (which will still be more than noticeable) so the list would be:
1. Small turbo - either small Garrett or whatever, or like mine, a T3T4 imitation -$1200 approx for the whole kit
2. TD42 manifold - second hand, about $50 from a wrecker/eBay - not sure on new
3. Let's say a 3" dump pipe and exhaust in total - $1400 approx
4. Turbo smart manual boost controller - $80
5. Not sure you'd need bigger injectors for that boost, but if so, VDO injectors 660cc - $480
6. If getting number 5 above, then Wallbro High Performance Fuel Pump - $280
7. ECU upgrade of some description - either piggy back computer (about $400) or new ECU - Haltech, Wolf, EMS, etc range from $1600 to $2100
8. Installation - budget on around $3000 for the above without dyno ($500) and dependant on setup.
So less than $7000 with a piggy back ECU setup and less than $8100 with a new ECU complete. And that includes a full exhaust replacement, bigger injectors and fuel pump which you may not need. You could also add an intake temp sensor ($150-200 fitted), but again, not critical at that level of boost.
Standard figures are around 127kw and 340nm at the flywheel with the above setup probably taking you to something more like 150-160kw and over 400nm of torque - at least a 20-30% gain if not more (I'm being conservative - mine is only pulling 7.5lbs of boost and is doing a shed load more than that - BUT, I have intercooler, new ECU for proper mapping etc, etc)
The more berries wanted, the more money ... don't know if this is more what you were looking for, but even though there's a few old threads on the other forum, turbo'ing a petrol is not all that common, so not a lot of people would be able to weigh into the discussion.
Did you call Quickspool and talk to Will as I suggested when you first posted this up?? He's a top bloke and will certainly provide you ballpark specs and pricing over the phone - if you haven't, then how about giving that a shot rather than waiting and hoping for it on here from people who aren't specialised turbo mechanics/installers? It's a specialist job mate, and as such, you need to look further than the Internet and actually start contacting installers - that'll at least give you some indication of outputs and costs irrespective of what setup they use (i.e. knowing whether it's "one dump pipe or two" for example is irrelevant if the price and guaranteed performance gain is right).
Either way, sincerely hope you sort it and get what you're after, the 4.2 is a workhorse and pulls hard with a little bit of aftermarket 'persuasion'.
And engineering mod plate after it is all done costs bugger all, keeps it legal, and keeps your insurance happy also.
EDIT: just realised yours is carby - sorry. Not sure on a carb upgrade, but strike the ECU for the fuel unless you go efi - that'll keep the price down also. I'll leave this post up though for others reference.
NissanGQ4.2 (25th February 2012), Robo (26th February 2012)
No I haven't rung anyone as yet, been trying to research all I can before I talk seriously to a shop.
I don't wade into any thing without knowing possible all I can before hand what I'm asking about first.
Found this has served me well over the years, can understand things better make more informed decisions.
And as you could appreciate less hassle in the long run.
As I read somewhere only today preparation, preparation,preparation is everything.
From what I recollect, that was quoted by a dead set genius of a bloke!!!! LMFAO
I agree with big (again! Lol). A forum is just a place where like minded people get together and chat about their interests and also try to help each other out. It's not a one-stop-shop for all the answers you need. To say your frustrated and disappointed that no one is willing to give you any help is a bit harsh mate! I think bigs last response has to be the most detailed I've seen on this forum and I'm sure he did a hell of a lot of research himself to be able to give you all that knowledge.
Talking to specialists in the field will get you what you need
Goodluck mate.
Lucas
Hello from Under Down Under!
Bigrig (26th February 2012)
First step i would do, without standing on anyones toes
Put the thing on a dyno and get a real world figure what it produces as it is now
Compare that to what the factory put out way back when
Sometimes, and sometimes doin mods on a tired engine can either be a step backwards , or with mods and engine age put out the same power as it done when new
Ive been playing with engines of various brands,makes,models and there is no magic mods that will produce that magic figure that suits everyone all the time
A race engine from an 11 sec drag car wont gaurantee that engine will do the same in every other car
Scotty has good resulkts from his TB, he is in a very small minority,theres not much on the subject either people want that info kept a secret, like say a shop who makes a livin from the secrets or
theres just not many doin it
You need a base line to start with , a dyno print out is that
You then need to after doin mods get another print out to ensure your goin forward
I don't wade into any thing without knowing possible all I can before hand what I'm asking about first.
This vehicle is a primary source of transport for my Wife, Kids and G/Kids and simply can't be off the Rd for extended period other than initial fitting and tuning.
If I'm going to do any mods, they have to work first time, not spend the next 2 yrs trying this or that.
Hence the reason I'm being so persistent with this thread.
Thanks to all for input so far.
Leaning towards .
After market ecm.
Reco, balanced efi engine.
molly rings.
oil cooler.
lower comp.
larger injectors.
Performance fuel pump and reg.
tuned pipe header.
twin pipe dump for better flow and reduced lag.
Garrett turbo water and oil.
twin electronic turbo controller.
intercooler with recirculating pressure relief valve.
egt sensor and gauge.
Knock sensor monitor.
pcv catch can.
most pipe work and mods done at home.
head de-comp and both ports smoothed out.
engine and most pipe work done prior to fitting into car and up and running.
possibly install 2nd intake manifold tubes for LPG injection also as alternate fuel.
but this is in first stages of thought and planing.
these 2nd fuel rails are available for additional fuel performance applications.
but would have to be taken into consideration from the build starting point and ecm.
Will see.
but don't expect anything to soon.
as this is a long process to do it right first time as you can appreciate .
Cheers.
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