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Just got my standard ecu remapped/dynotuned (rom tune from hyperdrive). Came up with 232hp at the wheels. DYNO GRAPH http://i13.photobucket.com/albums/a251/aut...ot/scan0003.jpg

My car is an 93 auto gtst with

gcg stage 2 R33 hiflow turbo (500hp)

full 3inch exhaust no cat and no spliter in the dump XFORCE system with 2 a midmuffler and rear cannon

apexi pod filter

gtr injector and z32 afm 040 fuel pump

front mount intercooler.

22$ boost controller still using the rb20 actuator with it presprung a little bit.

Does this sounds like a fairly decent power figure for an auto? i thought it was pritty low but yeah guy that did the tune seems to think its about all you will get from it.

ALso sometimes before it changes gears it goes on the limiter and take a while to change is this cause the auto can't keep up. Was thinking about getting a shift kit to fix this but dono if it would

Only problems i can think of that could cause lack of HP are:

I had to rotate the turbo housing cause BHDAVE had a himount manfold or something. Could the seal be leaking since i have done this and cause any problems. I doubt it cause air fuel ratios were good hyperdrive said and seems to hold boost fairly well. Also had a small crack in cooler piping but i patched it up with silcon hosing and put like 4 hose clamps on it (bit of over kill) but i don't htink its leaking

or

As someone mentioned the intake pipe is collapsing inwards with so much boost

Guy i brought the turbo off was running 12psi,with the stock injectors in it at this stage which is why the a/f ratio starts climbing at 6k and made 173rkw's http://image-cache.skylinesaustralia.com/f...-1132642989.jpg

Edited by AntonRx7
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well i think thats what, 175rwkw?

thats pretty reasonable for the RB20... if my mind isnt leading me astray with the kw conversion

A good ECU is going to make a difference also thats for sure

it has gtr injectors

yeah it does feel faster actually runs nice. think maybe ill get shift kit as well to help out with shifting speed.

I just though only running 14psi for most the time is pritt shit.

It was done at hyperdrive in WA

it has a rom tune which is like putting a chip into it as its an auto so aftermarket is pritty hard to use

RB25 hiflow

i brought it of BHDAVE from this forum do you think maybe something could be wrong?

i am using a boost controller from the forums one of the 22$ ones, although the boost line seems to be normal i have been told so this must be ok. Just really thought i would have got more HP than i have

Edited by AntonRx7

yeah even though mines auto seems a bit odd doesn't it

could it be a boost leak from anywhere like the turbo or something i wouldn't have though so but i dono what else could be the reason. I am running more boost and on a hiflow turbo and you have more than me a bit odd. Wat dyno was yours on

you have an extra .5 of a litre but even then somethings is not right ay. Inlet temps were 50 i think it says on the dyno sheet to dono if that owuld make that much difference either

Looks like he's got not timing in there at all. Then again could just be a mushbox as well. Was the trans slipping?

can i point out that its a bit hard to call how laggy a turbo is without seeing the tune ?

Your assuming that all other factors are perfect.

if your timing is way out(cam belt slipped) for example it can be a pig to spool and make no power.

how would i know if my timing is not right. surley they would have told me if the timing was not right. I dono if the trans was slipping i would have thought they would have told me that too.

Did feel a bit quicker last nite as it was cooler but still dissapointed with the hiflow turbo

you got a continuous 170rwkw over 5500-7500rpm without it tapering off.. thats not bad to me from an auto RB20.. but you'd expect maybe another 10% I'd agree at least.

I have a feeling your wastegate is bleeding off boost after 17psi due to the spring not being strong enough.. afterall - its 10psi above (rb25 actuator?) the standard boost the wastegate is set for?

You'd really have to speak to somebody who has the same turbo on an RB20 and find out what boost they have to run to get xxx rwkw to get another base comparison.

Edited by predator2

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