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Are Rb20 Turbos The Same Size As A Rb25

jarryd2nd

By jarryd2nd,
in General Automotive Discussion

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jarryd2nd Contributor

jarryd2nd

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:D HEY ALL :blink:

im in your help again as i need to know weather a rb25 turbo is the same size as a rb20.

****the reason for this is...****

i have dropped a rb20 im my e30 bmw and after this conversion my turbo is just clearing the chassis rail by 20mm so there is not much room to make it any bigger so i need a turbo basically the exact same size. and if the rb25 does happen to be the same size what is involved to install the rb25 e.g. pipes the target for the power it will produce is 200kw atw or a bit over

your helpis required thanks :):rolleyes:

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thrtytwo Veteran

thrtytwo

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dont quote me, i think rb25 turbo on an RB20 will get you about 180-190 with supporting mods, fuel pump, injectors, computer, zorst, cooler. But I think it would be stretching it to get 200. Someone will know better but thats the general power area im pretty sure.

as for the physical size of the turbo It's slightly larger.

hope this helps

edit: http://www.project32.net/img/turbo_actuators.jpg - 25 turbo on left, 20 turbo on right

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jarryd2nd Contributor

jarryd2nd

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dont quote me, i think rb25 turbo on an RB20 will get you about 180-190 with supporting mods, fuel pump, injectors, computer, zorst, cooler. But I think it would be stretching it to get 200. Someone will know better but thats the general power area im pretty sure.

as for the physical size of the turbo It's slightly larger.

hope this helps

edit: http://www.project32.net/img/turbo_actuators.jpg - 25 turbo on left, 20 turbo on right

OKAY thats fairenough but what if i high flowed the turbo is that goin to give me that power gain to get me closer??? i will be doing the above but also chucking in some tomie cams for that bit more punch surley that will get me on the money??? and how much boost could be put through it???

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Rekin Grand Master

Rekin

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an rb25 turbo on a rb20det will push around 180-190kw depending on tune (sometimes hit 200kw depending on dyno)

I currently have a hiflow rb20 turbo which will be getting installed next week along with a tune.

I'll let you know how much power I will gain with the hiflow.

Although there are different stages of hiflow so it depends how much you willing to spent to get it past 200kw

Some info here;

http://www.billetturbochargers.com/Turbo_r...and_hiflows.ews

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jarryd2nd Contributor

jarryd2nd

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an rb25 turbo on a rb20det will push around 180-190kw depending on tune (sometimes hit 200kw depending on dyno)

I currently have a hiflow rb20 turbo which will be getting installed next week along with a tune.

I'll let you know how much power I will gain with the hiflow.

Although there are different stages of hiflow so it depends how much you willing to spent to get it past 200kw

Some info here;

http://www.billetturbochargers.com/Turbo_r...and_hiflows.ews

im after spot on 200 kw atw but if its more thats sweet as but nothing less will be taken bloody wrxs are getting me atm damn there awd im currently lookin @ converting mine not a easy excercise

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thrtytwo Veteran

thrtytwo

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im after spot on 200 kw atw but if its more thats sweet as but nothing less will be taken bloody wrxs are getting me atm damn there awd im currently lookin @ converting mine not a easy excercise

would be easier and probably cheaper to sell up and buy a gts4 :rofl:

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TTT Grand Master

TTT

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A gts4 with rb20 and 1450kg is not a WRX beater in no way shape or form.

besides, this fella has an RB20 in an E30 (I would have gone sr20 but anyway)

that is the reason for his turbo upgrade issue. nothing physically bigger will fit in the stock spot.

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jarryd2nd Contributor

jarryd2nd

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A gts4 with rb20 and 1450kg is not a WRX beater in no way shape or form.

besides, this fella has an RB20 in an E30 (I would have gone sr20 but anyway)

that is the reason for his turbo upgrade issue. nothing physically bigger will fit in the stock spot.

exactly right gtst it is a fair bit lighter good suspension set up and i think it could get to the point of beating a wrx... im not out to even try and kill a sti what you think???

is it possible

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thrtytwo Veteran

thrtytwo

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A gts4 with rb20 and 1450kg is not a WRX beater in no way shape or form.

besides, this fella has an RB20 in an E30 (I would have gone sr20 but anyway)

that is the reason for his turbo upgrade issue. nothing physically bigger will fit in the stock spot.

lol obviously not stock, and i forgot he had the motor in a diff car :)

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