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03-18-2008, 12:02 AM | #51 | |
Top Scoob 019
Member#: 43630
Join Date: Sep 2003
Location: Down Under
Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
Quote:
Also the turbo housing has around that size diameter also for each scroll.. Found a silcone joiner 3" that we stretched over to fit 3 1/8" TB... I gave it an absolute stomp on the way home and did it feel quicker hard to say, but its was scary fast either way..hahahha. Its still stuck on and hasnt blown off which is a start.. Will be going on the dyno next friday when i get some other stuff sorted out.. to see if its changed in terms of power.. So if we have time maybe put on the standard mani as a comparison ... Otherwise ill be putting back the standard manifold and doing a direct comparo..
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Last edited by tino; 03-18-2008 at 04:30 AM. |
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03-18-2008, 08:28 AM | #52 |
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Join Date: Apr 2005
Chapter/Region:
Tri-State
Location: PA / Element Tuning
Vehicle:2005 STI.UR gt4088r E85 pro comp sti |
^^^im excited for the new dyno results....anyway you can get on the dyno earlier???...haha jk
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03-18-2008, 08:59 AM | #53 |
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Join Date: Jan 2005
Location: Down Under
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the black baloon hose ftw!
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03-18-2008, 09:14 AM | #54 |
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Join Date: Jun 2005
Location: Lebanon
Vehicle:2004 USDM STI Crawford Performance S5 |
Im sure the 3" silcone joiner will help...
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03-18-2008, 09:15 AM | #55 |
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Vehicle:2004 USDM STI Crawford Performance S5 |
cant wait for Friday's results,Good Luck man.
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03-18-2008, 11:16 AM | #56 |
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Member#: 57871
Join Date: Mar 2004
Chapter/Region:
NESIC
Location: Windham,Maine
Vehicle:2004 WRX 13.4 @ 102 |
In for new results...Good luck in getting everything sorted out man!
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03-18-2008, 01:43 PM | #57 | |
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Join Date: Sep 2003
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SCIC
Location: Bullet-Dodging Fwy Los Angeles
Vehicle:0405 WRX STi/S2000 AspenWhite/Silverstone |
Another well-known tuner here in the the US reported this on a Perrin & stock header thread:
Notice how he says the EL headers "lost" power @ higher rpm's post#108 http://forums.nasioc.com/forums/show...1110218&page=5 Quote:
That's my best guess. Alot of good suggestions from others here. Now, there could be other reasons. So you'll have to carefully analyze where the system is choking. Good thread.. we're all learning ! |
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03-18-2008, 01:53 PM | #58 |
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South East
Location: Atlanta,GA
Vehicle:4 Making them faster then anyone else. |
I swapped out the perrin header on a built GT35r car for a DC Sports and picked up 35hp at 7krpms. The perrin header is good for a STG2 car but works horribly on big turbo cars.
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03-18-2008, 07:19 PM | #59 | |
Top Scoob 019
Member#: 43630
Join Date: Sep 2003
Location: Down Under
Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
Quote:
Thats a fair comment, and I will look into it further i.e full race manifolds or UR.. but if i change the manifold if the restriction is in there then it will move to the upipe as i cant change the diameter of the upipe twin 38mm IDA pipe as it will hit the steering coloumn. So changing the header will it still be beneficial?? |
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03-18-2008, 07:20 PM | #60 | |
Top Scoob 019
Member#: 43630
Join Date: Sep 2003
Location: Down Under
Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
Quote:
Can u point me to the direction of the DC sports.. Whats the IDA of the piping?? And is it equal length.. |
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03-18-2008, 07:31 PM | #61 |
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Join Date: Mar 2006
Location: Chicago
Vehicle:1997 GC8 8.38@165Mph blue |
I am shoe horning a UR GT420R kit into a RHD GC8 right now.
It looks like the UR uppipe will clear the (rack just). |
03-18-2008, 07:34 PM | #62 | |
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Member#: 43630
Join Date: Sep 2003
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Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
Quote:
BTW wat is the internal diamter of the upipe, for each runner?? |
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03-18-2008, 07:41 PM | #63 |
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48mm , I thought the clearances would be similar maybe it wont work in the end !!!!
I will let you know, I did go to a Tilton pedal box to get rid of the brake and clutch master cylinder to give lots of wiggle room |
03-18-2008, 07:46 PM | #64 |
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Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
yes the brake and clutch cylinders as well as the sterring column resivoir are big issues trying to get the turbo for one and the dumpipe shoe horned in..
If that turns out to be the limiting factor then i might just have to live with it for awhile anyway.. Maybe having just the header may help, so will determine the benefits of that for now.. 500 hp atw on pump is more than enough to keep me happy.. Also is the diamter of the dump 3.5" and is the rear housing off the turbo 3.5" also?? Im running 3" from the housing all the way back so wondering if that also could be a restriction.. As for the cams my tuner said that if there were out it would be very obvious. |
03-18-2008, 07:51 PM | #65 |
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do you have a pic of your up pipe .
the downpipe is 4" from the turbo(4" rear housing) all the way back. I dont have power steering also |
03-18-2008, 07:54 PM | #66 |
Top Scoob 019
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Join Date: Sep 2003
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Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
damn u race car drivers.
nah dont have a pic of the upipe as we were in arush to get it all together by the new yr. Even though it turned out that, that didnt even come close to evenuating.. So you should be fine then.. AS for the 3" dump i also have a 2" wastegate tube venting out into the atmo.. so this would then make the exhaust gases flowing out of a 5" diameter?? |
03-18-2008, 08:02 PM | #67 |
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hook up a pressure gauge to your header pipe and see if there is a lot of back pressure, quickest way to see if you have a uppipe exhaust problem?
Last edited by saintluciascooby; 03-18-2008 at 08:11 PM. |
03-18-2008, 08:41 PM | #68 | ||
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Join Date: Apr 2005
Location: Central Pa.
Vehicle:2005 Sti 4094R Twin Scroll |
Quote:
That would make for a lot more stuff to get around that is on the left side of my car... I wish I new where a right hand drive car was around here that I could look at... There has to be a way around it... I am curious to see the difference the silicone coupler makes on your next dyno pulls... Quote:
Nothing against your tuner, I would just like to know his trick in seeing an obvious 5 or 10 degree error in cam timing... |
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03-18-2008, 10:37 PM | #69 | |
Top Scoob 019
Member#: 43630
Join Date: Sep 2003
Location: Down Under
Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
Quote:
yes its hard with RHD... As for degree cam timing, He told me that it wasnt out. As he built the engine so at this stage ill take his word for it.. |
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03-19-2008, 10:18 AM | #70 | |
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International
Vehicle:2006 STi Silver |
Quote:
3' dump = 1.5 (radius) squared times pi 2' dump = 1 (radius) squared times pi 3' area + 2' area = 10.210 square inches Divide that by pi then square root it you should get 1.80277564 (radius) Now double that and you have you total diameter of exhaust dump-age |
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03-19-2008, 02:23 PM | #71 | |
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MAIC
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Vehicle:96 3MI Racing search FIRST, then PM!!! |
Quote:
flow is going to be a bit different and your method would have less flow loss |
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03-19-2008, 07:02 PM | #72 |
Top Scoob 019
Member#: 43630
Join Date: Sep 2003
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Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
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03-19-2008, 10:05 PM | #73 |
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not sure I understand the question...if you are asking whether to go to 3.5", then yes, do it...if you are asking to go to 3.5" and run the wastegate back into the exhaust, I wouldn't.
With gains I've seen on the dyno between returned and atmospheric dump EWG's I will never run an internal unless its for a street car. Even then, I personally won't. |
03-19-2008, 11:16 PM | #74 | |
Top Scoob 019
Member#: 43630
Join Date: Sep 2003
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Vehicle:2004 GT40R-built 2.5 604 whp @1.8 BAR on VP109 |
Quote:
Which to ur answer is a resounding yes.. |
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03-24-2008, 12:41 PM | #75 | ||
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NWIC
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Vehicle:WRX H6-3.0 Turbo www.surgelinetuning.com |
Quote:
Quote:
http://forums.nasioc.com/forums/show...7#post21626737 Jeff |
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