99lspwr

Well I originally started with your typical 6-7 psi boost range with maybe 1 psi spike, then moved to 9 psi with about a 1.5 psi spike....Now currently running 11 psi, I am getting 2 psi spikes...I know this is cause the internal gate and all, but can any greddy owners tell me if they are running more boost than this ,and what kind of spikes they are getting???Just tying to get an idea of what I am in for at higher boost levels since the turbo seems to be spiking more and more as the boost levels rise...

VTC_CiViC

As you up the boost, you make it that much harder for the wastegate to regulate flow. I hope you've got the fuel for 14psi+..

99lspwr

plenty of fuel + wideband = safe a/f Timing, well a whole nother topic...

BoostedITR41

with the boost at 7-8psi set at the wastegate I was spiking too. now I have a profec-b and the boost is much much more stable....I run 15psi daily with no spikes

99lspwr

no **** huh?????Thats awesome man, I was under the impression that I could not prevent the internally wastegated 18g from spiking a pound or two...What did the profec cost?????I am guessing easy install correct? Thanks

BoostedITR41

I bought the whole turbo set up and the boost controller came with it. I didn't install it when I put the kit on I ran 8psi for awhile then wanted more. the boost controller is very very easy to install. a power, gound, and vaccum lines that is about it. you should be able to pick up a profec b pretty cheap on here

99lspwr

thanks man..

roydogg

Still getting spikes @15psi? I get spikes to 18psi when I set it to 15 then as rpms increase toward redline the boost goes from 14-15-13 dam gate won't hold steady . I'm about to go external, any suggestions anyone?

boostin GSR

the avc-r helped smooth the spikes up top for me when i ran 14psi with the greddy kit

boostdmp5

switch over to an external wastegate-no more spikes roydogg how much are you looking to spend on one, delta-gate is pretty cheap and works fine for me(some people don't like these) or you can go with a more expensive tial wastegate...

Pikachu

You can't convert to an external WG with the greddy manifold can you?

99lspwr

I shortened up the vacc line from the mbc to the wg along with some more fooling with the mbc, and now I can boost up to 15 psi with only a psi or so of a spike...

roydogg

I wanna go external but what manifold would I get? I probaly have to fool around with the duty cycle on my avcr or I'll just buy a 1.0bar actuator .


Modified by roydogg at 11:03 AM 3/28/2004

SOHCArchangel

you can have the internal wg housing port ported, that usually helps a bit if your up in the higher boost range

roydogg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHCArchangel &raquo;</TD></TR><TR><TD CLASS="quote">you can have the internal wg housing port ported, that usually helps a bit if your up in the higher boost range</TD></TR></TABLE>
Would I have to upgrade the flapper?

99blusi

Does anybody make an upgrade flapper...I know the 34mm from TRE won't fit...

TheShodan

iTrader: (14)

Try Forced Performance, or SLOWBOY Racing, they have wastegate flappers and can port the housing.