View Full Version : What size turbo is best for a B18ft
Hi people just a quick one as you may or may not know i have a 1.7 prima racing renault 5 gt turbo at the mo the engine is being rebuilt.My question is at the mo the car has a modded t2 turbo on there.What size turbo is best to go for on these engines as a t2 seems to small on a 1.7 engine.What works well for fast road use?
Was thinking a good t25?
Many thanks guy
I thought the prima was a 1.7 based on the renault 5 gtx totally different to the volvo. :confused:
I thought the prima was a 1.7 based on the renault 5 gtx totally different to the volvo. :confused:
It uses the same block tho does'nt it.Although head is different.My point is i just want to know what turbo would be best to use on a 1.7 turbo lump.
Hope that reply doesnt sound snotty Phil its not ment to be :)
No probs, i asked about the prima engine when starting on my gt restoration.
The volvo has a t2 as you know, the upgrades as far as im aware are a t25 or t28. Most of the volvo lot are running a t28 from a pulsar or 200sx.
Im sure others will post their comments, t28 seems to be the way to go.
Does the prima run the same manifold as the volvo? you can put either t25 or t28 onto the volvo manifold with very little mods, keeping it at the rear of the engine.
Does the prima run the same manifold as the volvo? you can put either t25 or t28 onto the volvo manifold with very little mods, keeping it at the rear of the engine.[/quote]
No it runs a prima made manifold which puts the turbo in the in the same position as a c1j a few people have said i may need to mod the manifold to get a larger turbo to fit.Thanks for your help Phil
Looks Like T28 is the way then.:)
Markey Mark (BD)
09-10-2010, 16:01
How much boost you intending to run on the engine mate?
I'd say go for at least a T25, i think this will work quite well on the larger capacity engine so won't feel too laggy or flat low down.
i've just picked up a TB2810 from a Fiat Coupe 2.0
i gonna use it with my Big mod conversion.
the unit that i use now is a chinaturbo
A TD04H (t25/28), does his job very good, last tuesday @ the circuit of Assen. i smoked a R26R on the straight @ 1,5 bar ;)
TrixNFlix
09-10-2010, 16:25
I can confirm that t28's are not laggy on this engine. :)
SCHWARTZ
09-10-2010, 16:27
anyone given a t3 a go:D
Markey Mark (BD)
09-10-2010, 16:29
anyone given a t3 a go:D
Depending on the size of the T3 wheels and housings i recon it would work on there, prob feeel like a T28 on a C1J but only guessing really prob worth a try.
SCHWARTZ
09-10-2010, 17:20
after going out in james5 car and seeing what a vnt can do i was thinking about trying one on one of these engines. Aparently a vnt wouldnt work something to do with the sensors and throttle body etc...:confused: anyone have any ideas how to get round this?
Markey Mark (BD)
09-10-2010, 18:38
after going out in james5 car and seeing what a vnt can do i was thinking about trying one on one of these engines. Aparently a vnt wouldnt work something to do with the sensors and throttle body etc...:confused: anyone have any ideas how to get round this?
Yeah, don't fit one! :D;)
SCHWARTZ
09-10-2010, 19:16
Yeah, don't fit one! :D;)
:rolleyes:should have seen that one coming:laugh: t28 it is then.
How much boost you intending to run on the engine mate?
I'd say go for at least a T25, i think this will work quite well on the larger capacity engine so won't feel too laggy or flat low down.
Like to run about 20 psi mate.Would you say go for a t25 over a t28 on my engine?
I can confirm that t28's are not laggy on this engine. :)
Ok thats handy to know was worried it might be.At what rpm is it on full boost?
the prima engines come with a similar spec turbo to the ktr180, slightly larger than a std gtt t2 and max's out about 18psi. heads are similar, gtx has 3 nuts holdin the rocker cover on, the volvo about 10. the prima manifold will need the throat extending for turbos larger than that as the touh the head and wont go on. a t25/28 are the same core just the t28 has a t3 comp housing and larger wheels. t3's are generally old skool, not as effecient as newer t25/28 versions, the fange is different so would need changing so usually not worth the hassle. not heard of anyone trying a vnt but cant see why sensors or thottle body would affect it? for about 20psi you want volvo green injectors with resistor pack, a bypass hole and a turbo from the likes of a twin turno skyline, nissain s14/15, pulsar etc with a .64 ex housing, should make boost bout 3k and on full chat by 4k. the laggier .82 housing i use isn't on full chat til 4800 but produces less torque low down makin the clutch and gearbox last longer. to make proper use of any larger turbo a cam from the b18 e or ep engines is worthwhile, in fact, something i'd do first.
the prima engines come with a similar spec turbo to the ktr180, slightly larger than a std gtt t2 and max's out about 18psi. heads are similar, gtx has 3 nuts holdin the rocker cover on, the volvo about 10. the prima manifold will need the throat extending for turbos larger than that as the touh the head and wont go on. a t25/28 are the same core just the t28 has a t3 comp housing and larger wheels. t3's are generally old skool, not as effecient as newer t25/28 versions, the fange is different so would need changing so usually not worth the hassle. not heard of anyone trying a vnt but cant see why sensors or thottle body would affect it? for about 20psi you want volvo green injectors with resistor pack, a bypass hole and a turbo from the likes of a twin turno skyline, nissain s14/15, pulsar etc with a .64 ex housing, should make boost bout 3k and on full chat by 4k. the laggier .82 housing i use isn't on full chat til 4800 but produces less torque low down makin the clutch and gearbox last longer. to make proper use of any larger turbo a cam from the b18 e or ep engines is worthwhile, in fact, something i'd do first.
Thanks for that haz your a star its something i need to look into.The cam in it is one of prima's own so god knows that that is.Its still running on a carb at the mo so injectors aint a problem.lol
I have just bought a Garrett t28 from a 200sx with the .64 housing.
At present i have my car just running in, t2 running 10psi, i have not given the car full beans yet either, once i have done 1000 miles on the engine i will up it to 16-17psi.
I can honestly say I'm not sure about fitting this t28, the car feels nippy as it is :).
Honestly t28 guys is it worth the upgrade, im just thinking, 230bhp+ = trouble getting the power on the floor, more strain on running gear, i have a 215 valeo clutch in, im then going to have to change that, modifications to injectors, new manifold and down pipe or save the penny's and go the easy way and shoe horn it at the rear.
Whats the resistor pack for and bypass hole?
Who has driven the cars with t2 vs t28 to compare and would you do it again?
Im leaving it on the shelf for now, might get a go in someone else's car to see. Maybe i will just get used to it and want more power.
I just know so many lads evo and scooby etc, mess round and chase the hp with big turbos etc, then ruin there cars.
Feedback chaps :)
SCHWARTZ
02-11-2010, 18:33
mine seems to go well with a t2/25 at 18psi fueling needs sorting out but goes really well. starts boosting at 2.5k full boost by bout 3k isk;)
no probs. as prima tended to use the gtx engine, i'm gonna assume its the gtx cam. i've not tried one but pretty sure they're wilder than std. injectors may not be a problem, but the restriction of the carb, which is usually gtt, will have an effect at some stage.
phil, 16-17? wont make much more power than 14-15 and thats if fuelling allows as the turbo is out of its effeciency range. they are nippy with the std blower, the bigger you go the laggier it gets, but the more feirce it kicks in and harder it pulls to the limiter, also raising the power curve/torque reducing strain on the box, clutch etc. 230 can but a bit of a handful especially in the wet, it does put a bit more strain on everythin but mine was reliable and used/abused on a daily basis. you will need to have a new downpipe made but not the manifold, but you dont have to run 20+psi. even at a bar it'll feel more lively to save changin injectors, clutch etc.
resisitor pack is for the 740 injectors, as the are a different impedence so will blow the ecu outputs if not used. bypass hole it to trick the afm to seeing less air flow so it puts less fuel in at idle.
to answer your question, for everyone who i've fitted a big turbo for, none have gone back to a t2, all came back for more boost and most cam back for bigger injectors, cams etc.
i like to think of these tried and tested mods to be making the most out of the engine, volvo's arent exacly from the factory rally/race cars, and usually de-tuned by volvo after they were mapped.
Ok haz i though the carb would be the main problem try to get it to fuel right on the 1.7.I might run it on the t2 and then go for something like a t25 with .49 rear as i want the car for fast road not the strip.Going to be spending a long time with the wideband getting the carb right i think.:)
no probs. as prima tended to use the gtx engine, i'm gonna assume its the gtx cam. i've not tried one but pretty sure they're wilder than std. injectors may not be a problem, but the restriction of the carb, which is usually gtt, will have an effect at some stage.
phil, 16-17? wont make much more power than 14-15 and thats if fuelling allows as the turbo is out of its effeciency range. they are nippy with the std blower, the bigger you go the laggier it gets, but the more feirce it kicks in and harder it pulls to the limiter, also raising the power curve/torque reducing strain on the box, clutch etc. 230 can but a bit of a handful especially in the wet, it does put a bit more strain on everythin but mine was reliable and used/abused on a daily basis. you will need to have a new downpipe made but not the manifold, but you dont have to run 20+psi. even at a bar it'll feel more lively to save changin injectors, clutch etc.
resisitor pack is for the 740 injectors, as the are a different impedence so will blow the ecu outputs if not used. bypass hole it to trick the afm to seeing less air flow so it puts less fuel in at idle.
to answer your question, for everyone who i've fitted a big turbo for, none have gone back to a t2, all came back for more boost and most cam back for bigger injectors, cams etc.
i like to think of these tried and tested mods to be making the most out of the engine, volvo's arent exacly from the factory rally/race cars, and usually de-tuned by volvo after they were mapped.
Thanks haz, let see what happens, a mate of mine once said to me "once a maxer always a maxer" So will probably have my t28 on by xmas :laugh:
sure you'll get it to fuel fine, a bar is what your aiming for on the t2, so set the carb up to run similar to 18psi on a gtt and you'll be close. they'll be threads with details on that old skool bit of kit ;).
and phil, probably :laugh:
[quote=Haz;185500]sure you'll get it to fuel fine, a bar is what your aiming for on the t2, so set the carb up to run similar to 18psi on a gtt and you'll be close. they'll be threads with details on that old skool bit of kit ;).
Ok mate is it worthless at running my t2 above a bar of boost due to the fact above that it wont be affective? Like you say the spec on my turbo is smilar to the ktr180 as it has a larger front wheel and 360 bearing.
Maybee im being a cheapskate here but my mate has a t3 turbo off an escort rs in his garage he insures me its fine no smoke etc & i can have it for nothing.
heres whats written on the turbo.
garett airresearch,
88 on the front
42 where the boost hose goes
0.38 on the back
we had a look it looks like if we rotate it & buy a t3/t2 adaptor it will fit ok.
my worrys are will there be enough room for it between engine and bulk head?
what boost will it handle?
and how laggy it will be?
or will i be better off just buying a t28 off a 200sx?
ioshi_s_golf
24-03-2011, 03:20
Hi mate one of my friends he put t3 from lancia turbo on b18ft and it kicks from 3000 -3500 rpm. And there is space for the turbo. But go for t28.
BluntyR5GTT
24-03-2011, 05:21
rst t3 are good for about 1 bar max boost and about 180bhp
brilliant thanks guys. spot on :agree:
il keep looking for a t28 then as i want to run a little more than a bar and 180bhp.
How about breaking from the norm and trying a gt2252 the comp map looks quite good.
http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT22/GT2252_452187_6.htm
And from looking at turbo technics catalogue they where fitted to 2.7 engine Nissan used in it's cabstar and terrano as well as the 3.0 trade.
ok maybee i got lucky the guy in the unit next door seems to mess about with alot of jap cars, so i asked him if he had a 200sx turbo hanging about he says yes ive got one over there nothing wrong with it the customer just upgraded i could have it for £100.
theres a small amount of play in the shaft up & down none left to right.
but is this the right turbo?
the numbers on it are.
A/R60 M24 1-2 on the front.
60 where the boost hose goes
6.4 on the back
56F where it goes onto manifold.
heres some pics
http://i830.photobucket.com/albums/zz223/shakespics/latist%20renault%205%20project/40turbo.jpg
http://i830.photobucket.com/albums/zz223/shakespics/latist%20renault%205%20project/39tur.jpg
http://i830.photobucket.com/albums/zz223/shakespics/latist%20renault%205%20project/IMAG0586.jpg
He has the adaptors for air filter hose & boost hose.
but the elbow is facing the wrong way if it were fitted to the b18ft, what elbow do i need for it?
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