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t66 turbos on rb25det

dabigbolf

By dabigbolf,
in Engines & Forced Induction

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dabigbolf Proficient

dabigbolf

Posted
Posted

hey,

just wondering about the t66 turbo, and how'd they go on an rb25det. what modifications would need to be made, manifold, exhaust etc?

what power would be made on around say 16psi (for starters), and how much the it would cost to get one set up.

can they be made to spool up at around 3500 rpm.

anyone with t66's on there rb25det's would love to see ya results.

cheers

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dabigbolf Proficient

dabigbolf

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only reason i ask is because i figure bigga turbo+"less" boost= still big power. meaning dont have to boost as much for same results, but u get a little lag instead.

there was an rb30et with one and it made over 330rkw, but that was on around 22 psi. just wondered if many had them on rb25det's.

dabigbolf Proficient

dabigbolf

Posted
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thanks.

if i was to say that on 16psi a t66 would make around 280rwkw, with other mods such as fuel system, intercooler, exhaust, and ecu, would i be close to the mark. or would it be more like 240rwkw.

the thing is, i have a dream. and in this dream i want to run 11's, and when running 11's ......

hungry6 Experienced

hungry6

Posted
Posted

I did the exact set up on my last engine and it started to spool up about 3700-4000 rpm and then by 4001 rpm she hit full boost(20+psi) and three lanes from where u were, when u last looked at the rd, and the time it take to go from 4001-7500rpm is 0.000001 of a sec.

YBSLO4 Proficient

YBSLO4

Posted
Posted

Ever looked at something like a T04R or T51R from HKS? Big power, not as much lag as a T66. The T04R kit is a medium-large HKS single turbo capable of 730+rwhp (Dynojet / 860 flywheel horsepower) on high boost. The JUN s15 has one and pushes out big power, so if it works well on SR20's, it should work just as well on an RB :D

TO4R specs

T04R Turbine wheel dimensions are 74.2mm/64.7mm

T04R compressor A/R is .70

Available T04R turbine A/R's are .81, .84, .96 and 1.15

HKS turbo inducer / exducer sizes

HKS T04R 66.7mm/84mm

HKS T51R KAI 70.3mm/94mm

HKS T51R SPL 76.5mm/102.2mm

dabigbolf Proficient

dabigbolf

Posted
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Posted

hey,

thanks for all the info. i am not to sure about which way i want to go. Ball bearing is much more expensive, and dont really cant justify spending into the $3000 mark on just a turbo. The large garret items however can be gotten for around the $2000 mark. but a t04e might be another option.

hungry6 wat sorta power were you making at the treads, and wat sort of times would a turbo like this be good for. 1250 kg car. i know theres heaps of other variables, but did u manage a good time.

thanks

any more input welcome from other guys with big turbo setups

dabigbolf Proficient

dabigbolf

Posted
  • Author
Posted

hey,

i sorta thinking away from the t66 idea. 4000rpm spool sounds a bit boring for street use.

was thinking of getting a turbo which can still make around the wsame power, but just have a smaller housing.

is that how it works?

if not how can i make the same sort of power but have boost coming on a hell of a lot earlier.

is this possible or is it a compromise.

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