GT30 Turbo
12-07-2004, 09:42 AM
#1
GT30 Turbo
HI all,
Am thinking of putting a gt30 turbo on me rwd saff. What i want to know (so does my tuner) is will a gt30 be suitable for a standard cossie head. Mine hasn't had the ports enlarged and we were wondering if there would be a huge surge with the bigger blower. Obviuosly once we know the answer to this we can sort out fuelling and mapping.
Am asking because i dont want to buy a £1500 turbo only to find it isnt suitable.
Maybe Stu or one of the other mapping specialists have seen a gt30 on a standard head?
Any help would be nice.
Cheers
Rich
Am thinking of putting a gt30 turbo on me rwd saff. What i want to know (so does my tuner) is will a gt30 be suitable for a standard cossie head. Mine hasn't had the ports enlarged and we were wondering if there would be a huge surge with the bigger blower. Obviuosly once we know the answer to this we can sort out fuelling and mapping.
Am asking because i dont want to buy a £1500 turbo only to find it isnt suitable.
Maybe Stu or one of the other mapping specialists have seen a gt30 on a standard head?
Any help would be nice.
Cheers
Rich
12-07-2004, 09:54 AM
#2
Professional Waffler
what spec gt30 would help for a start!
i havent any knowledge of the gt series so wouldnt really be able to tell!
you say your tuner would like to know??? are you sure hes a tuner?
i havent any knowledge of the gt series so wouldnt really be able to tell!
you say your tuner would like to know??? are you sure hes a tuner?
12-07-2004, 10:00 AM
#3
I wasnt aware there were different specs of gt30! I know there are different turbos within the gt series but i thought a gt30 to fit a rwd exh manifold would be just that. but i stand to be corrected.
Its M.A Developments, so yes very sure.
Its M.A Developments, so yes very sure.
12-07-2004, 10:02 AM
#4
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Originally Posted by GARETH T
you say your tuner would like to know??? are you sure hes a tuner?
What sort of power are you going for as well??
12-07-2004, 10:06 AM
#7
Jap Crap: what did you think? whether my tuner is a tuner or a gt30 for a rwd exh is just that?
No idea of power figures. Hopefully over 400 bhp is possible, but without knowing if the turbo work ok and no surge problems then its a bit hard to say.
No idea of power figures. Hopefully over 400 bhp is possible, but without knowing if the turbo work ok and no surge problems then its a bit hard to say.
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12-07-2004, 10:11 AM
#8
He would be able to answer if he had done a conversion like that. He has only put gt30 on modified heads which is why i wanted to no if anyone had put one on a standard head. Dont want to spend that sort of money without knowing first.
Porkie: internal wastegate but as for trims ect, dont no.
Porkie: internal wastegate but as for trims ect, dont no.
12-07-2004, 10:14 AM
#9
DEYTUKURJERBS
If i remember right theres 3 different ex housing/wheel, and 2 different comp housing/wheel options on "proper" GT30s.
Then theres always the slight differences in spec various turbo building people always seem to do and still call em GT30s...
Then theres always the slight differences in spec various turbo building people always seem to do and still call em GT30s...
12-07-2004, 10:22 AM
#10
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ahh. What I meant was, Mark Shead (m.a.developments) is a well respected tuner, just ask any of the maddettes 
Thought he might know the answer to this question. though, like you say, he has no experience with this conversion so I guess he wouldnt..
Sorry to be no use to your question, as I have no experience with the turbo and as its so new I doubt anyone will have on a standard head...
Thought he might know the answer to this question. though, like you say, he has no experience with this conversion so I guess he wouldnt..Sorry to be no use to your question, as I have no experience with the turbo and as its so new I doubt anyone will have on a standard head...
12-07-2004, 10:31 AM
#13
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Rich,
Karl is prob the best person to ask (Karl Norris)........as I know for a fact that one of his favorite conversions on a standard engine is a T4 (with greys).....so I am thinking that surely he has tried or dismissed the GT 30 as well.
Also he is a big fan of the GT series turbo's in general.......so he knows these turbo's quite well
Karl is prob the best person to ask (Karl Norris)........as I know for a fact that one of his favorite conversions on a standard engine is a T4 (with greys).....so I am thinking that surely he has tried or dismissed the GT 30 as well.
Also he is a big fan of the GT series turbo's in general.......so he knows these turbo's quite well
12-07-2004, 11:16 AM
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Originally Posted by cossierich330
If the turbo works ok then i am going to see about 750cc injectors which I am told Stu can map too on a level 8. So well over 400 bhp could be achieved. 
12-07-2004, 11:21 AM
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surely headwork is needed to get the best results from a large turbo like that
why not lift the head and sort it now rather than fit it, map it, it surges (ive no idea if it will or not), lift head, sort the head, remap it etc
cheaper in the long run and will flow more if done properly
why not lift the head and sort it now rather than fit it, map it, it surges (ive no idea if it will or not), lift head, sort the head, remap it etc
cheaper in the long run and will flow more if done properly
12-07-2004, 12:02 PM
#20
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Originally Posted by SapphyMike
Originally Posted by cossierich330
If the turbo works ok then i am going to see about 750cc injectors which I am told Stu can map too on a level 8. So well over 400 bhp could be achieved.
The head is a stage 1 port and yes Stu can map 750cc injectors on level 6 or 8 but only 8 will have lambda control....
12-07-2004, 12:22 PM
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Re: GT30 Turbo
Originally Posted by cossierich330
What i want to know (so does my tuner) is will a gt30 be suitable for a standard cossie head. Mine hasn't had the ports enlarged and we were wondering if there would be a huge surge with the bigger blower.
12-07-2004, 12:29 PM
#23
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Sorry....
The way I saw it was Sapphy mike was asking if "am going to see about 750cc injectors which I am told Stu can map too on a level 8. So well over 400 bhp could be achieved. " was with a standard head but after reading it again it could be asking if 400bhp is achievable on standard ports (the answer is yes).....
The Sapph was mapped on 750cc plus level 8 and closed loop lambda, an MD240R turbo (with air to air) and a stage 1 ported head....
The way I saw it was Sapphy mike was asking if "am going to see about 750cc injectors which I am told Stu can map too on a level 8. So well over 400 bhp could be achieved. " was with a standard head but after reading it again it could be asking if 400bhp is achievable on standard ports (the answer is yes).....
The Sapph was mapped on 750cc plus level 8 and closed loop lambda, an MD240R turbo (with air to air) and a stage 1 ported head....
12-07-2004, 12:35 PM
#24
sapphy mike wasn't asking: I was. Never mind. And yes i wanted to know if a GT30 would work with a STANDARD 2wd cossie head.
Theres no point in me having one if a standard head couldnt handle over 400, coz otherwise i could just stick with a t34 with .63 exh.
Theres no point in me having one if a standard head couldnt handle over 400, coz otherwise i could just stick with a t34 with .63 exh.
12-07-2004, 12:38 PM
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Originally Posted by SapphyMike
Originally Posted by cossierich330
If the turbo works ok then i am going to see about 750cc injectors which I am told Stu can map too on a level 8. So well over 400 bhp could be achieved.
12-07-2004, 12:40 PM
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omg...
no, i wasnt exactly asking.. i was stating
i was told that the standard head couldnt produce over a certain level of power, and that is less than 400bhp...
no, i wasnt exactly asking.. i was stating
i was told that the standard head couldnt produce over a certain level of power, and that is less than 400bhp...
12-07-2004, 12:43 PM
#28
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Originally Posted by SapphyMike
omg...
no, i wasnt exactly asking.. i was stating
i was told that the standard head couldnt produce over a certain level of power, and that is less than 400bhp...
no, i wasnt exactly asking.. i was stating
i was told that the standard head couldnt produce over a certain level of power, and that is less than 400bhp...
TIB ran a standard head and so does Lee,s 3door IIRC and that must over 400bhp...
12-07-2004, 12:44 PM
#29
fair play daz c. My mistake. 
SapphyMike: i was also told that the flow stops at 360ish bhp on a standard head, but me and Mark are hoping that the volume of air produced by the gt30 may over come this, but will have to wait and see.
Maybe Karl or Stu could shed some light on this.
SapphyMike: i was also told that the flow stops at 360ish bhp on a standard head, but me and Mark are hoping that the volume of air produced by the gt30 may over come this, but will have to wait and see.
Maybe Karl or Stu could shed some light on this.
12-07-2004, 12:47 PM
#30
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Daz,
Maybe so, but it was also shock lol...
I thought Lee's sapph was ported? 470bhp on a standard head would surely mean that all the people who get their heads ported etc to get 500bhp are wasting their money?
Rich,
If no one answers this question, theres only one way to find out
Maybe so, but it was also shock lol...
I thought Lee's sapph was ported? 470bhp on a standard head would surely mean that all the people who get their heads ported etc to get 500bhp are wasting their money?
Rich,
If no one answers this question, theres only one way to find out
12-07-2004, 12:51 PM
#31
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Originally Posted by SapphyMike
Daz,
I thought Lee's sapph was ported? 470bhp on a standard head would surely mean that all the people who get their heads ported etc to get 500bhp are wasting their money?
I thought Lee's sapph was ported? 470bhp on a standard head would surely mean that all the people who get their heads ported etc to get 500bhp are wasting their money?
Plus that was 470 including NOS wasn't it?
12-07-2004, 01:04 PM
#34
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Originally Posted by SapphyMike
Daz,
I didnt think Lee's NOS was working very well that day???
I didnt think Lee's NOS was working very well that day???
12-07-2004, 03:05 PM
#36
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Karl is prob the best person to ask (Karl Norris)........as I know for a fact that one of his favorite conversions on a standard engine is a T4 (with greys).....so I am thinking that surely he has tried or dismissed the GT 30 as well.
he converted my RS500 and it goes very well, rolling roaded at nobles at 371 BHP on std engine at 25psi boost (but chip will boost to 28psi) still going well after about 9 months use
cossyman
12-07-2004, 05:26 PM
#37
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Originally Posted by DazC
Originally Posted by SapphyMike
Daz,
I didnt think Lee's NOS was working very well that day???
I didnt think Lee's NOS was working very well that day???
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