What turbo to achieve 350bhp?

sx_turbo

sx_turbo

Lifer
AdamB said:
I looked into those sx_turbo, and there wasn't much difference in spool times between these and the garrett gtx series. My engine builder said hes used the efr series turbo's and said that they don't come close to garrett.
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i dont believe garrett make a gtx charger small enough to perform well on the 4e, hence i havnt recomended them, and there gt stuff is a bit dated now,

the efr series can flow high boost make high power and give a nice early 3.5k spool time (from memory, its been over a year since i worked it all out and went through the compressor charts etc)

according to garrett they can only really recomend the gt2860r which is a relatively late spooling turbo, again from memory roughly 4-4.5kbefore it gets on song,

the efr turbo in theory you could get 10psi @3k rpm, but then have 28psi by 4k, and then go on to well over 2bar past that, this could easily be acheived running a compression ratio of 8:1 (with good mapping)

though to be fair to get the desired power output you wpould have to run the turbo at 2.2-2.4 bar boost to achieve a goal of 350 and that power wouldnt be made till 6.5k
 
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R

rwdstarlet

Member +
AdamB said:
Ideal for a drag car, fast road it's probably pointless, could work on track but that would depend on what track it would be.
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x2
I Had a Black turbo boxy up in enniskillen Drag racing just gone, it was a 4e wit a td05 and went wicked good, was laggy in first gear so allowed for a high rpm launch, with out much wheel spin (but i was running 10" hooziers),haha, then when it kicked in it was Grate fun. Id go for the TD05 if i were you lad the pull of it was amazing. and would see you to 350 with a GOOD map.hope that helps ya some bit :)
 
A

AdamB

Member +
sx_turbo said:
i dont believe garrett make a gtx charger small enough to perform well on the 4e, hence i havnt recomended them, and there gt stuff is a bit dated now,

the efr series can flow high boost make high power and give a nice early 3.5k spool time (from memory, its been over a year since i worked it all out and went through the compressor charts etc)

according to garrett they can only really recomend the gt2860r which is a relatively late spooling turbo, again from memory roughly 4-4.5kbefore it gets on song,

the efr turbo in theory you could get 10psi @3k rpm, but then have 28psi by 4k, and then go on to well over 2bar past that, this could easily be acheived running a compression ratio of 8:1 (with good mapping)

though to be fair to get the desired power output you wpould have to run the turbo at 2.2-2.4 bar boost to achieve a goal of 350 and that power wouldnt be made till 6.5k
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Do agree mate, the smallest gtx series is a little bigger than the gt2860, the efr that I was looking at does spool about 3.5k and the garrett gtx is at about 4.2k.
But in fairness its one thing looking at the chart, but its something completely different in testing each turbo. Which is why I think most people tend to stay td/vf series because its tried and tested. Not many people opt for a gt28, gt30 or borg warner turbo's.
 
sx_turbo

sx_turbo

Lifer
People stick with the td04 because its cheap and there plentiful, and no one offers alternatives,

this makes it difficult to get new products into the starlet market, there isnt the scope for development on starlets as theres not enough people interested,

i was so close to getting one before i sold, but i was offered an offer that i couldnt refuse,

as for the turbos being different in actual testing, to be fair if there flow charts says that an efr will spool quicker than a gt28rs then in real world testing it will, as for the power though they will more than likely differ from whats on paper, and depends on other mods aswell etc
 
A

AdamB

Member +
Skalabala said:
It looks great... Can someone please tell us what the map says? :)
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At 1 bar boost pressure on a 1331cc 4e engine, with a stock head and rev limit at 7200rpm the turbo is 74% efficient and you will spool just before 3600rpm.
At 2 bar boost pressure on a 1331cc 4e engine with a stock head and rev limit at 7200 rpm the turbo is about 71% efficient and you will spool about 3800rpm

:)
 
sx_turbo

sx_turbo

Lifer
David-Starlet said:
what do gt2860rs spool like on 4e? should make 350 anyway
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gt2860rs will achieve 350 maybe more, and full boost wont be achieved till 4.5 from memory, again been a long time, but i pretty certain not much happens with the gt28 till at least 4k, then suddenly BOOM, you get all the power in one wopping great hit, which is quite fun, just not ideal for street, good for track though
 
B

buckets

Member +
sx_turbo said:
gt2860rs will achieve 350 maybe more, and full boost wont be achieved till 4.5 from memory, again been a long time, but i pretty certain not much happens with the gt28 till at least 4k, then suddenly BOOM, you get all the power in one wopping great hit, which is quite fun, just not ideal for street, good for track though
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if the rev limter gets rised its a perfect turbo for a 4e
 
Ted

Ted

Member +
sx_turbo said:
gt2860rs will achieve 350 maybe more, and full boost wont be achieved till 4.5 from memory, again been a long time, but i pretty certain not much happens with the gt28 till at least 4k, then suddenly BOOM, you get all the power in one wopping great hit, which is quite fun, just not ideal for street, good for track though
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good point, power delivery is important too in a fwd car trying to put down over 300 hp. im using a vf29(took a long time to find), full boost at 4400 or maybe slightly earlier. but its making a reasonable amount of boost at 3.5 and it just keeps climbing in a linear fashion. think thats because its ball bearing. means less chance of wheelspin as a big turbo comes in with a bang.

last turbo i used was a vf35. it was good because it gave a td05 size kick up high but spooled 500 rpm sooner thana td05. it wass journal bearing though and there was just no boost worth talking about below 4k-then a big bang.

turbo before that was a vf24 which is similar to the 29(ball bearing) and behaved similarly. didnt like long periods at over 1.4 bar though.

ive got a brand new vf35 sitting in case the 29 shits itself(ball bearing issue) and although it would give 20 hp more than the 29 , i would bet the 29 would be faster both on road and drag racing
 
J

jayc-glanza17

Fresh Recruit
on a track dedicated car not an everyday street car, how would td05 be??
or what turbo that fits the td vf flange, thats bigger then td04 but not as laggy as td05...
think that will give el_man a more definitive anwser to his question.
 
Ted

Ted

Member +
jayc-glanza17 said:
on a track dedicated car not an everyday street car, how would td05 be??
or what turbo that fits the td vf flange, thats bigger then td04 but not as laggy as td05...
think that will give el_man a more definitive anwser to his question.
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it goes in order of size

td04 - vf24/28/29 - vf35/43 - vf30/34 - td05 - vf22.

all the same flange, some ball bearing, some not. td05 is a pretty ancient design now, any of the vf35/43/30/34 will make similar power to a td05-16g but with less lag. there are many others but these are the ones ive used or seen used on a starlet
 
S

Skalabala

Member +
Ted said:
it goes in order of size

td04 - vf24/28/29 - vf35/43 - vf30/34 - td05 - vf22.

all the same flange, some ball bearing, some not. td05 is a pretty ancient design now, any of the vf35/43/30/34 will make similar power to a td05-16g but with less lag. there are many others but these are the ones ive used or seen used on a starlet
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Rep :)
 
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