IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: SuperSix on April 04 2011, 12:15:38 PM

Title: When is an external wastegate required?
Post by: SuperSix on April 04 2011, 12:15:38 PM: I am tinkering with the needed parts to get the new GN running, and one of the things it needs is a downpipe.

I saw this over "there"..
http://www.turbobuicks.com/forums/parts-sale/96902-large-list-remaining-v8-swap.html
279 downpipe 3" cottons performance for external wastegate, used
500 rg-45 external wastegate used

Prices are what he paid, not what i would offer.

At what point is an external wastegate required or help? I don't plan on racing much at all (at the track at least)

Car specs are:
PT51
030 bore
202/202 cam
RJC Powerplate
Mototron 06's
Chip from Eric
3" singleshot from Cotton
Airbags
10" converter
Title: Re: When is an external wastegate required?
Post by: Scoobum on April 04 2011, 07:58:44 PM: You should be able to control boost easily with an internally gated DP with the PT 51 you have. RJC now sells a larger puck to help control boost with the larger turbos. I've run as high as 24 PSI with my 70 and my RJC internally gated DP...with no boost creep. Norbs and I had to do some wastegate porting to achieve this tho.
Title: When is an external wastegate required?
Post by: Steve Wood on April 04 2011, 08:34:05 PM: maybe in the nines?
Title: When is an external wastegate required?
Post by: Scoobum on April 04 2011, 08:39:49 PM: Quote from: "Steve Wood @ Mon Apr 04, 2011 7:34 pm"
maybe in the nines?

You'd be correct Steve. I found a pic of Grumpys car with the hood up that ran the 9. It's got an internally gated DP...and I believe he ran a 67...and prolly up around 30 PSI.
Title: When is an external wastegate required?
Post by: Steve Wood on April 04 2011, 09:41:32 PM: or more LOL
Title: When is an external wastegate required?
Post by: SuperSix on April 04 2011, 09:42:18 PM: OK, Thanks. Aside from looking cool, it's a waste of $$$.

Anyone have a DP for sale? :P
Title: When is an external wastegate required?
Post by: Scoobum on April 04 2011, 10:27:53 PM: Quote from: "SuperSix @ Mon Apr 04, 2011 8:42 pm"
OK, Thanks. Aside from looking cool, it's a waste of $$$.

Anyone have a DP for sale? :P

A word to the wise. If you can't find an authentic used THDP...then I highly suggest you buy a 3" DP from RJC. Buy once...not twice...like I did.
Title: When is an external wastegate required?
Post by: SuperSix on April 04 2011, 10:43:41 PM: I haven't heard than name in awhile, Kinda like Mease.
Thanks, I will look into one.
Title: Re: When is an external wastegate required?
Post by: $1987 GN$ on April 04 2011, 11:28:30 PM: ...
Title: When is an external wastegate required?
Post by: Grumpy on April 08 2011, 04:35:20 PM: Quote from: "Steve Wood @ Mon Apr 04, 2011 8:41 pm"
or more
Title: When is an external wastegate required?
Post by: G. Price on April 09 2011, 07:10:22 AM: ...
Title: When is an external wastegate required?
Post by: Steve Wood on April 09 2011, 09:31:21 AM: On what planet, Dan? :D