R34 With Gcg Hiflow Problem

[paulr33]

bend the actuator rod

[666DAN]

had same problem with slide performance stage 3 hiflow

swapped for hks gtrs and holds boost perfectly at 1.4 bar

everything else was identical , exhaust , intake etc

i personally suspect turbine housing but I am no expert

Have you got any dyno charts?

[32vspecII]

have not had a dyno run with the gtrs

but graphing on the power fc controller is flat as

[666DAN]

have not had a dyno run with the gtrs

but graphing on the power fc controller is flat as

I meant with the slide hiflow....the GT RS would be fine, that I'm sure of

[32vspecII]

chart!

[666DAN]

chart!

That's massively laggy, I'm making the same boost at 3800rpm....your drop-off definately isn't as excessive as Bikeys, hmm wonder what Bikey has come up with????

[SECURITY]

im pretty sure he did that mod to his intake and it worked. it must have been sucking closed.

Edited November 26, 2007 by SECURITY

[bikey]

Well guys, i tried that intake pipe mod, but as i was connecting the airfilter+afm back, i realised it was bending abit much so im sure the airflow is restricting. im gonna get back into it, and cut off abit more of the steel pipe i put between the intake pipe, hopefully sometime during this week, or the weekend. there was still some boost drop (reading off the boost gauge). my mate decided that we'd replace the blitz bov while we were still in the engine bay, so we put in the stockie, and piped it back plumback style, and for the first time it seems, boost is holding at about 1.1 bar or just over 16psi! This is my mate observing the boost gauge.. So first ill fix up the intake pipe, and then ill throw it on the dyno, and see if were progressing or not. Ill keep you guys posted.

[666DAN]

Well guys, i tried that intake pipe mod, but as i was connecting the airfilter+afm back, i realised it was bending abit much so im sure the airflow is restricting. im gonna get back into it, and cut off abit more of the steel pipe i put between the intake pipe, hopefully sometime during this week, or the weekend. there was still some boost drop (reading off the boost gauge). my mate decided that we'd replace the blitz bov while we were still in the engine bay, so we put in the stockie, and piped it back plumback style, and for the first time it seems, boost is holding at about 1.1 bar or just over 16psi! This is my mate observing the boost gauge.. So first ill fix up the intake pipe, and then ill throw it on the dyno, and see if were progressing or not. Ill keep you guys posted.

Watching intently

[bikey]

Looks like ive solved the problem boys!! i swapped over the 13cm steel pipe i had in my intake pipe, with a 10cm one, and it sat perfectly, though slightly smaller than standard. so after eliminating the bend i had with the 13cm pipe, my car is boosting way better. im hitting 1.5bar(22psi) which is then backing off to 1.2bar(17.64psi). seems like its spiking... it'll be goin on the dyno hopefully on the weekend.

will keep you posted...

zero traction in 1st and 2nd

nice....

[r32sky_line]

Seems to be a pretty common problem with the factory intake pipe sucking closed.

I'm suprised no one has come up with a bolt-on alterative.

[OVADRV]

good to hear bikey,that intake mod solved my problem,waiting to see what you come up with on the dyno

[bikey]

looks like i spoke too soon.... car went on the dyno this afternoon, and its still dropping boost. in fact according to the dynograph, there isnt any change from before at all! ive ruled my blitz boost gauge as faulty... a few people reckon it might be the boost controller, so with the less expensive options knocked out of the way, my next move is to go electronic on the boost controller.. spin out!!

btw, a friend was saying that by upping the gain through an electronic boost controller, youre causing stress on the turbo.. any insight on the matter???

[Simon-S14]

Try an ell cheapo turbotech bleed valve virst, but i doubt it will do any better then the blitz.

have you bent the actuator arm yet?

[666DAN]

looks like i spoke too soon.... car went on the dyno this afternoon, and its still dropping boost. in fact according to the dynograph, there isnt any change from before at all! ive ruled my blitz boost gauge as faulty... a few people reckon it might be the boost controller, so with the less expensive options knocked out of the way, my next move is to go electronic on the boost controller.. spin out!!

btw, a friend was saying that by upping the gain through an electronic boost controller, youre causing stress on the turbo.. any insight on the matter???

Yep clone situation of what happened to my car, the dyno never lies The boost controller won't fix it either, trust me I've been down this path and spent enough money on the folly. It always comes back to the same conclusion....GT-RS is the way to go.

[bikey]

For all those interested, i finally got my AVCR installed 2day. produced 261.1rwkw on a dyno dynamics. held 18psi throughout. ill be leaning it out abit in a few weeks, as it is a tad bit too rich for my liking.

BUT, the boost controller fixed the prob.

666DAN: what kind of boost controller u got there bro?

[SABBAi]

good to hear you have it sorted.

[666DAN]

I was using a Profec B-Spec II, I also used and HKS actuator, the stock actuator, an RB20 actuator and a combination of boost controller and all the actuators. I also ran with *NO* actuator and still got a ceiling of around 16psi and boost drop-off.

[bikey]

hmm profec b, the boys at Unique autosports patched in one of those in the midst of my boost problems... even though it held the boost better, there was still significant boost drop. the avcr on the other hand worked the treat. you can increase the duty according to rpm, and throughout each gear. also has a self-learn process, so itll adjust better as you drive. might wanna try out the avcr. my 2c..

[666DAN]

hmm profec b, the boys at Unique autosports patched in one of those in the midst of my boost problems... even though it held the boost better, there was still significant boost drop. the avcr on the other hand worked the treat. you can increase the duty according to rpm, and throughout each gear. also has a self-learn process, so itll adjust better as you drive. might wanna try out the avcr. my 2c..

Yep just bought one, worth it just to see if I can get some sort of improvement before I shell out on something more expensive (GTRS) I like the fact is has graphing and 60sec recall....I'm a whore for features like that