hey guys I have been thinking of putting a turbo on a holden six I have read a few threads on it in this forum and the old one and now have my red 186 in bits on the floor I was planning a full rebuilt for it or maybe a transplant to a black 202. If I want to set it up for a turbo now is the time, as always a funds are kind of tight.
I know that I should set it up as low comp engine with a turbo ground cam ( or a standard cam if I can get a way with it) but as far as the turbo set up I was planning a blow though system,the motor already has roller rockers and an msd coil, leads, elec-dzzy etc and the head is a standard 186 head that has been ported
my question is
1 what size carby to buy ? I am looking at a 500cfm 2 barrel holley will that be to big, I can jet it down a bit if needed?
2what size turbo to use? One of my mates is a car wecker and I would like to be able to use a turbo out of his yard. Anyone know what jap car turbo would match best for a 202 or 186?
3 is using a an intercooler the best way to go for this appilaction?
I know the best choice is a turbo kit designed for a holden six but if I can build my own I would be happy
any help about spec and ideas on how to build and design a good system on a tight budget would be great
Sorry I kind of rambled on but I pretty new to old holden motors and would love to turbo an old school holden six
cheers antony
turbo set up and design?
Started by
_superlowuc_
, Jan 08 2006 02:03 AM
15 replies to this topic
#2
Struggler
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Posted 08 January 2006 - 07:32 AM
You're bound to get a few different replies to this, so this is my opinion only.....
1. The 500 will work but a 350 might be better (more airspeed and a better signal)
2. Something of a similar size engine ie VL turbo, VG30 etc. Series IV or V RX7 is a great turbo but might be a bit slow to spool up but will make great power.
3. A 'cooler would be nice but adds more expense. Consider water/windex injection.
A budget deal would be to fit 202 pistons in your 186 (to lower comp), use the standard or a regrind cam, standard exhaust manifold with a cast iron J pipe to mount the turbo on.
It won't run ten sec. quarters but it will be a blast on the street.
Good luck with it !!
1. The 500 will work but a 350 might be better (more airspeed and a better signal)
2. Something of a similar size engine ie VL turbo, VG30 etc. Series IV or V RX7 is a great turbo but might be a bit slow to spool up but will make great power.
3. A 'cooler would be nice but adds more expense. Consider water/windex injection.
A budget deal would be to fit 202 pistons in your 186 (to lower comp), use the standard or a regrind cam, standard exhaust manifold with a cast iron J pipe to mount the turbo on.
It won't run ten sec. quarters but it will be a blast on the street.
Good luck with it !!
#3
_superlowuc_
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Posted 08 January 2006 - 08:17 AM
hey thanks mate for the info I would be interested to find out more about the "J dump pipe " to mount the turbo on I think i will give you a pm about it
thanks again
antony
thanks again
antony
#4
_high_rpm_
_high_rpm_
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Posted 08 January 2006 - 01:15 PM
heres a pic of a home made kit showing the "J" pipe idea
#5
_superlowuc_
_superlowuc_
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Posted 08 January 2006 - 02:38 PM
cheers mate gives me something look and think about
#6
_mike_nofx_
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Posted 08 January 2006 - 02:49 PM
High RPM.. is that a blow through set up?
Did you make it up all yourself? It looks great!!
As for which turbo to use... Mines running a T04 and it goes hard, running 6 PSI.
I seen a turbo decompression plate on ebay, which has now ended. It would be a good idea tho. Take a look here!
There was even a strata 2 turbo kit with turbo, water injection, manifolds wastegate.. for $1300... also which ended . But as you said you wanted blow through, and on a budget, so its prob no good for you. Take a look anyway Just for ideas.
Did you make it up all yourself? It looks great!!
As for which turbo to use... Mines running a T04 and it goes hard, running 6 PSI.
I seen a turbo decompression plate on ebay, which has now ended. It would be a good idea tho. Take a look here!
There was even a strata 2 turbo kit with turbo, water injection, manifolds wastegate.. for $1300... also which ended . But as you said you wanted blow through, and on a budget, so its prob no good for you. Take a look anyway Just for ideas.
#7
_dave720gtr_
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Posted 08 January 2006 - 09:04 PM
Hay mabe you should try supercharging .I recently fitted a toyota blower [ cheap] on ebay/ same as the kit rod hadfield sells for holden six. on to 202 in a LJ for under $600. we made all the mounting hard wear . had pully made to run 2/2one . it makes 8psi boost. and smokes VL turbos essy. and gen 111 V8s.alot cheper....... 
#8
_jap-xu1_
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Posted 08 January 2006 - 09:55 PM
dont kid yourself man.Hay mabe you should try supercharging .I recently fitted a toyota blower [ cheap] on ebay/ same as the kit rod hadfield sells for holden six. on to 202 in a LJ for under $600. we made all the mounting hard wear . had pully made to run 2/2one . it makes 8psi boost. and smokes VL turbos essy. and gen 111 V8s.alot cheper.......
you wont be smokin anyone with one of those superchargers.
please dont take my comment as being smartass,just take it from someone who has been around the traps of forced induction for a while.
go the turbo
#9
_high_rpm_
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Posted 08 January 2006 - 09:56 PM
nah this is one that turbotorana made a while ago terrible one also used it then toranaz had it and sold itHigh RPM.. is that a blow through set up?
Did you make it up all yourself? It looks great!!
ive been thinking of making up something simular just havnt had the cash to buy a turbo and shi7
#10
_superlowuc_
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Posted 09 January 2006 - 11:04 AM
hey "high rpm" do you know were the waste gate is on the set up you posted?
I like the idea of the "J" pipe but I would like to keep the carby up on the inlet manifold I was wondering if any one has built one that worked well with the "J" pipe going the other way so the turbo was between the radiator and inlet mainfold,
as this might make it easier to pipe in the intercooler and mabe some kind of cooling vent though the front grill, "struggler" emailed me a photo of his 308 set up little like that so I guess some one out there has a photo of it on a 202/186
any help with the pipe design would be great as some of you guys have "been there and done that" and know what works and does not
cheers antony
I like the idea of the "J" pipe but I would like to keep the carby up on the inlet manifold I was wondering if any one has built one that worked well with the "J" pipe going the other way so the turbo was between the radiator and inlet mainfold,
as this might make it easier to pipe in the intercooler and mabe some kind of cooling vent though the front grill, "struggler" emailed me a photo of his 308 set up little like that so I guess some one out there has a photo of it on a 202/186
any help with the pipe design would be great as some of you guys have "been there and done that" and know what works and does not
cheers antony
#11
_high_rpm_
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Posted 09 January 2006 - 02:55 PM
it may be a internal waste gate but im not 100% hopefully terrible one will find this thread soon.....
#12
_Terrible One_
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Posted 13 January 2006 - 02:46 PM
Hey, it might interest you to know that the kit didn't use a wastegate at all. I think it just relied on restriction to cap the boost. On my 173 the highest it ever made was somewhere around 13psi in top gear, close to 5000rpm. Off the speedo as well. 
That one used a T04 sized turbo, the actual brand of the turbo is unknown, hence the reason why I never tried to get it rebuilt.
I'm thinking of throwing another one very similar together (probably blow through) so I can get my LJ re-registered as a turbo 202 before these apparent new RTA rules come in to effect. If you have a little bit of knowledge and can weld ok, you should be able to make up a very simple setup on your own that'll work a treat.
That one used a T04 sized turbo, the actual brand of the turbo is unknown, hence the reason why I never tried to get it rebuilt.
I'm thinking of throwing another one very similar together (probably blow through) so I can get my LJ re-registered as a turbo 202 before these apparent new RTA rules come in to effect. If you have a little bit of knowledge and can weld ok, you should be able to make up a very simple setup on your own that'll work a treat.
#13
_Terrible One_
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Posted 13 January 2006 - 02:48 PM
Oh yeah, why has the stainless pipe been cut in half now? 
#14
_superlowuc_
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Posted 18 January 2006 - 12:53 PM
yeah I was trying to work out why the intake pipie from the turbo was cut, also were is the carb located on this setup? was it right after the trubo between the pipes, I am getting the parts to build one of these, It lookes like the inlet mainfold is factory as well, are the inlet and outlet mainfolds welded together by the turbo support plate?
also does the pipe have to be steam pipe or is a heavy gauge (3-5 mm) reg steel pipe ok?
sorry about all the questions
cheers antony
also does the pipe have to be steam pipe or is a heavy gauge (3-5 mm) reg steel pipe ok?
sorry about all the questions
cheers antony
#15
Struggler
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Posted 18 January 2006 - 07:07 PM
also does the pipe have to be steam pipe or is a heavy gauge (3-5 mm) reg steel pipe ok?
Go to your local metal centre and ask for "red roo" or equivalent. They will know what your talking about. Most big centres will have the preformed bends as well. They will all be the same diameter and when welded up will look quite neat.
Good luck with it.
P.S. The pictured setup is a draw thru (the carb is located on the front cover of the turbo), pay no attention to the intake side. You will be mounting the carb in its original location.
Edited by Struggler, 18 January 2006 - 07:10 PM.
#16
_superlowuc_
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Posted 19 January 2006 - 01:37 AM
thanks agian struggler, will take a drive down and see what I can get
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