Jump to content
SAU Community

Recommended Posts

Hello guys.. I just Got my Turbo package wcich is GT3040 with .63 exhaust housing, Tial 38mm wastegate and i also got an apointment with my mech. for the next thursday :) and he said after installation we power run it to see if i need to upgrade my Injectors and if so he will get me 600ccs (God help me with my fuel cunsumption ;)). so fingers crossed.

IF YOU GUYS WANT to know the resault i can post in this thread and let u all know..

JimX Thanks for you reminder pal... ;)

  • Replies 174
  • Created
  • Last Reply

Top Posters In This Topic

R31Nismoid and Rob77, his info says he has an R32. That would mean his injectors are 270cc, not 370.

ya, i was reffering to R0b77 when i was bring up all the formula's etc.

But you can substitute 370 for 270 or any other number really

and INASNT... remember it's RB20, so a .63 housing would go nicely.

0.63 is a rather small exh housing for a 3040, i got a 0.82 rear on mine

How do you knwo 0.63 is small? Check my post above. You haven't put yours on yet, might be a lag monster.

Guy here changed from 0.61 on HKS 3037 (bit smaller comp wheel only compared to 3040) to 0.87 and went from 256rwkW @ 1 Bar with full boost at 3500rpm to 280 at 1.2 bar but no boost until 5200rpm. Would be heaps slower on the road.

Gotta remember the A/R is a ratio, not an absolute number so if you have a big exhaust wheel then the area inside the exhaust housing will also be big to maintain the ratio of 0.63. And it's the area that gives the flow at the top end + the exhaust wheel diameter.

Probably find the gt3040 will spool up a bit quicker, I have a td06-20g comes on full boost around 4200rpm, thus far on 1bar we made 339hp. I have just started playing with my boost controller and wound it up to 1.1bar and it feels like its made a large difference, definately getting more wheelspin... eventually we'll get it on the dyno and tune it for 1.2bar I'll post the results when on hand.

Probably find the gt3040 will spool up a bit quicker, I have a td06-20g comes on full boost around 4200rpm, thus far on 1bar we made 339hp. I have just started playing with my boost controller and wound it up to 1.1bar and it feels like its made a large difference, definately getting more wheelspin... eventually we'll get it on the dyno and tune it for 1.2bar I'll post the results when on hand.

Rob your TD06 has the exhaust housing meant for a 13B rotory, so do you really think if you gave a Garret 3040 (Internal or external gate) a 1.12 A/R exhaust housing that it would still spool up quicker.

If you used the recommended Trust housing on your car (12cm^2), then it would provide a lot more midrange hit. The response you are getting could probably be matched by the bigger Trust TD06-25g (Trust recommend 10cm^2 for an RB25...remember what Freebaggin said about A/R sizes and wheel sizes :rolleyes: )

...but this aint a thread about Trust turbos, just pointing out that a turbos characteristics can vary a lot depending on the A/R housings used.

How do you knwo 0.63 is small?  Check my post above.  You haven't put yours on yet, might be a lag monster.  

Guy here changed from 0.61 on HKS 3037 (bit smaller comp wheel only compared to 3040) to 0.87 and went from 256rwkW @ 1 Bar with full boost at 3500rpm to 280 at 1.2 bar but no boost until 5200rpm.  Would be heaps slower on the road.

Gotta remember the A/R is a ratio, not an absolute number so if you have a big exhaust wheel then the area inside the exhaust housing will also be big to maintain the ratio of 0.63.  And it's the area that gives the flow at the top end + the exhaust wheel diameter.

Same guys that are putting my car together had a 3037 on a stock sr20 and made 300rwkw at 1.6bar and it had a 0.82 rear on it or similiar. The owner said it wasent laggy at all, and after seeing it being canned around the streets i agree with him.

The 0.82 seems to be the best combination for making good power without being a lag monster, as recommended by the shop that built my turbo.

Well, with 0.87 turbine housing boost is now coming in alot earlier, hard to know exactly, but experimenting with peak hold on power fc, I now get 1.2bar at 4200rpm, 3rd gear. ( and it was [email protected], not 280:D:p, 270 at 1.1bar, 300 at 1.5bar - top end was choking, which it doesnt feel like it is doing anymore:) -fitted new 90mm catback) - feels stonger everywhere now, on and off boost - but havent re-dynoed yet, so just seat of the pants, cant wait to get it up and push the redline to 8000rpm (before the exhaust upgrade power peaked at only 7000rpm before tapering back a little.)

anyways the car pulls hard, but boost doesnt come in quite as hard as with 0.61 housing (1bar at appox 3000rpm) - car was stepping out in 4th at 90-100kph and only a bit more than lazy accellerating - made it very scary to drive on the road in traffic, cos boost was like an on/off switch, and when it came on the back end would step out every time with as little as 1.2bar - the only way to control the car was by turning boost down:(

I can actually control boost with the right foot to a fair degree now, which is really nice, more boost, just push the right foot in a bit further. So gentle traffic driving, stays in traffic off boost no probs, at lights or if overtaking. I have 1.7bar set for the road, vs the 1.0 with the smaller housing.

Under 0.5bar, the boost comes in very linearly, from approx 0.5bar, she starts pulling hard.

but the best part is now I can control the boost ramp with my right foot to a fair degree, so no more surprises in heavy traffic - really is very nice to drive and very controllable.

All in all, alot better for the street, and much happier with the 0.87now, but wouldnt mind going a 0.73 to see how it compares (anybody got a spare one they want to sell/loan me?)

For interest too, and comparison to trust turbos, HKS rate their turbine housing sizes:

0.61 = 8cm

0.73 = 10cm

0.87 = 12cm

thats what the tags on the housings say when you buy them new anyways.

HKS actully recommend the 0.87 for the 3037 kit they sell for RB25.

I have done cams too (256/264) but I also dropped CR to 8.6:1 which I think it is fair to say would offset the increase from the cams to a fair degree.

anyway, sorry I waffled a bit

Steve

PS Lachlan, can you pm me the name and contact details of your dyno guy?

Cheers

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I did a skidpan night at SMSP this week, it was much cheaper than $350. But yeah, you need to slap an LSD in that thing.  I put an OS Giken in the 370Z and it's f**king MARVELOUS even compared to Nissan's viscous LSD. So you're saying it's free now that it's a housing estate? 😂
    • Nah, the car seems to run exactly as it did prior, in saying this it does "seem" to be better down low, like more eager to rev, but that may be 100% placebo effect from intake noise But, I'm not worried about it at all, in the end it is a fairly low compression NA engine that has a well shrouded intake,  if it is getting hotter IAT I cannot notice anything negative performance wise from the seat of my pants thrashing it about on the street or sitting in traffic, so meh, car now now makes induction noise so I'm happy
    • Do you have an IAT sensor? It's worth checking it to see. You may be suprised how little gap you actually need to flood your engine with hot air. (I tape up my airbox for a reason) :p
    • @KinkstaahKrinkle paint the "silver" alloy, not the red filter frame Engine bay heat won't be a issue worth worrying about as the silver alloy blocks it off on 3 sides, as for the top, the bonnet seals most of it and the big OEM CAI intake snorkel is still fitted in its original position  I will head into Clark's Rubber when I have some time to grab some pinch weld to tidy up the alloy after I paint it As for performance, I honestly wasn't expecting any, the only reason I got it is because the intake noise sounds cool to my old ears when I'm feeding it the beans Sometimes it's the silly things you do in in life that gives the most fun, and I do love anything that makes cool car noises In other news: I survived 4 nights at sea with Jackie not throwing me over board, holidays are continuing now as we are currently chilling at the Beachcomber in Toukley, after taking the coast roads from Sydney in the MX5, top down all the way, Toukley is where I spent a good deal of my youth holidaying during the summer months, there's lots of reminiscing going on,  and lots of beaches and old houses to visit Next on the list is to head to Batemans Bay for a few days, but we will take the Commodore out to stretch its legs, then Commodore hasn't really moved for months
    • There’s probably people who’d like to do it and then when it comes to putting their hands in their pockets they’ll all disappear into the shadows 
×
×
  • Create New...