Hks2835 Tune

[75coupe]

yep thats what Im thinking since I heard he didnt adjust it, problem is now it will cost me another tune or atleast partial, damn I wish I could tune...

[Harey]

I can imagine it would be hard to be a tuner just like its hard to do any job but if I did something in my job that my client wasnt happy with they would ask why too wouldnt they...

oh slap, hey I should of just added a smiley face it was a bit pun from other threads I read, I have no experience with hypergear and I think he does a great job...

and I do appreciate your help, its more confirmation for me tbh Im obviously able to see there is a problem, I wouldnt say 'clearly need' though.

so do you have anything constructive to add or are you just venting?

The way it is written looks very different. I think you should change it as the way it is written is basically defamation of a company.

As others have said crank up the wastegate preload. It should only be roughly $100/hour of dyno time. It should be less than 2 hours.

Also pickup one of those $30 turbotech boost valves. It solved the GT3076 problem the other day.

[wolverine]

I would be very tempted to have a cheapy turbotech boost controller handy just in case the PFC boost controller is either playing up or has been setup poorly.

$30 is cheap to rule out a potential problem.

Wastegate pre-load is still the most likely issue that needs to be checked.

I just swapped a GT-RS for a 2835ProS on the Stagea and it made 262rwkw at 16psi (bleeding to 15psi) and it was all in pretty much around 3300rpm (from memory). I know there is more average power to be had with fine tuning light, light/medium load but the headline number is pretty consistent with other results.

You will sort it out.

[75coupe]

Yep Ive got a turbotech controller so I'll chuck that in for the tuner as well...

[75coupe]

Finally got the car back in for another tune with adjustment made to the wastegate... now making 290rwkw, I'll post the dyno sheet once I pick them up...

this time the dyno print should have rpm, boost & afr for a better overview...

[wolverine]

A better result this time.

[Harey]

Thats fantastic news mate! Well done. Awesome peak power figure and knowing the turbo it will have a very strong mid range.

Just concretes my opinion that these are the best turbo for a stockish RB25 engine.

[75coupe]

Thats fantastic news mate! Well done. Awesome peak power figure and knowing the turbo it will have a very strong mid range.

Just concretes my opinion that these are the best turbo for a stockish RB25 engine.

Well all the reading and research lead me to believe this was the best choice turbo for response vs power, the tuner believes the turbo is too small, but maybe he thinks Im chasing power beyond the 2835s range, I would of been happy with 275-285rwkw tbh, which I thought the turbo was well able to do, much less and it would be in gtrs rhelms really wouldnt it...

I cant wait to post dyno sheets and see what people think... Im eager to see afr's myself

[bcozican]

is this an 0.82 rear housing or 0.63??

[75coupe]

Im fairly sure the 2835 all have the .63...

[NickR33]

Just concretes my opinion that these are the best turbo for a stockish RB25 engine.

totally agree... great turbo

[R31 POWER]

The Pro S kit has the .68 . Buying the turbo by it self you have the choice of either .68 or .87 for some strange reason. Keen to see the boost curve!

Edited November 30, 2010 by R31 POWER

[paulr33]

from memory that choice size only applies to SR20

[89CAL]

the .82 rear is optioned for the 1JZ as well.

I've just got my HKS GT2835 KAI kit, so I'm interested to see the difference in this over the Pro S. Supposed to be the new version of the Pro S but I cant find much info on it, other then it makes a couple of KW more at the cost of some torque? But its still a bit sketchy anyway lol.

Glad to see you got yours sorted mate. Will be helpful if something similar happens to me when my tune is started

[paulr33]

can u post some hires pics of the KAI

[PM-R33]

Keen to see the dyno graph, awesome results man!

[Harey]

Guys the 2835 Pro S kit for the RB25 definitely comes with the 0.68 exhaust housing by default:

http://cgi.ebay.com.au/HKS-Turbo-Kit-GT283...=item20b4f48ef8

The 0.68 is how they get the awesome response and mid range, but it still seems to be big enough to flow 280-290rwkw on 98, which is enough for most people on stock rb25s.

If someone can repair turbos this could be a great buy:

http://cgi.ebay.com.au/R33-R34-RB20-RB25-G...=item19c1223b3b

[GTScotT]

The 0.68 is how they get the awesome response and mid range, but it still seems to be big enough to flow 280-290rwkw on 98, which is enough for most people on stock rb25s.

Indeed it is a good turbo mate, HKS back cut the wheel so flow characteristics are anyones guess.. HKS know what they are doing tho, that turbo is GUN.

Numbers are one thing, but seeing on road results from a 2835 is totally another league.

[bcozican]

i musta got the optioned one as i have an 0.82 rear on my Pro S kit sitting on my rb22

awesome... def waiting to see the graph.. +1 great turbo's and good results

[Harey]

i musta got the optioned one as i have an 0.82 rear on my Pro S kit sitting on my rb22

awesome... def waiting to see the graph.. +1 great turbo's and good results

Thats strange I thought the Pro S had either a 0.68 or 0.87 exhaust housing??