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Old 04-19-2010, 04:30 PM   #101
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Crashtke what do you think this turbo should spool at even with the 272 Kelford cams, Joe at goodspeed thinks the large Diameter runners on the AMR header is hurting the spool up on the turbo and Clark thinks the .70 is just too big.
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Old 04-19-2010, 04:34 PM   #102
06rexwagon
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.70 on a twinscroll is pretty small really.
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Old 04-19-2010, 04:36 PM   #103
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Im not running a twinscroll its a singlescroll
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Old 04-19-2010, 04:36 PM   #104
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This is the .70 open, not the divided. What gear was the 4700 in?
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Old 04-19-2010, 04:37 PM   #105
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Also curious to know what gear that is in. In 2nd gear that would be pretty good 5th, that would suck, lol.
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Old 04-19-2010, 04:37 PM   #106
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That was in third gear, he said it should spool a little faster in 4th due to the increased load. Can the headers really move my full boost by 700 rpms I know it had 2inch runners but 700.
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Old 04-19-2010, 04:41 PM   #107
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Quote:
Originally Posted by ASU View Post
Im not running a twinscroll its a singlescroll
Oh, didn't know.
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Old 04-19-2010, 04:44 PM   #108
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Depends on a lot of factors. Those headers are more suited to a S364, S366 or something along those lines. Also, depending on the wall thickness you could be losing some heat too. That will effect spool time as well. The S362 I posted had the headers and the up pipe wraped in thermal heat wrap with 2 1/4 inch collector on the header going to a 2.25" up pipe.

Personally I would not want to go any smaller on the turbine side as I would be afraid it would choke off top end. It would be a waste to have cams, intake and heads that promote better top end flow only to choke it off with too small of a turbine housing.

Edit: looked back and it was 2.25" up as well.

Last edited by crashtke; 04-19-2010 at 10:02 PM.
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Old 04-19-2010, 04:46 PM   #109
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I agree on that about the cams etc etc. Im thinking the Header is the culprit at this point as well. Ill have a complete dyno sheet hopefully in 10 days for you all
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Old 04-19-2010, 04:52 PM   #110
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Trust Clark. He knows his stuff
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Old 04-20-2010, 06:22 PM   #111
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Quote:
Originally Posted by ASU View Post
I agree on that about the cams etc etc. Im thinking the Header is the culprit at this point as well. Ill have a complete dyno sheet hopefully in 10 days for you all
Just an update, I switched the AMR header with a Perrin. The gate is opening at 4100 rpm in 3rd gear. That is 6-700 rpm sooner with the smaller diameter Perrin header.

Joe
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Old 04-20-2010, 06:53 PM   #112
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Nice.
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Old 04-21-2010, 12:52 AM   #113
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I knew it was the header. Plus. This motor needs to break in. Its got 20 miles on it

C
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Old 04-21-2010, 04:32 PM   #114
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^^nice call, didn't think 700rpm was possible; amazing...was the top end effected?
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Old 04-21-2010, 04:38 PM   #115
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Probably not by much if any with that sized turbo.
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Old 04-21-2010, 05:21 PM   #116
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I have a larger turbo then this car. I have had 5 different types of headers on the car. The only ones that will outspool stock manifolds are the Small perrins or the Synic equal. From small to large headers I see no more then 10 to 15 hp lost at redline. Thats a fine trade off for 700 to 800 rpm extra power band. This car did not lose any power. Remember that most of these cars have a 44mm gate blowing to the ground. Once that opens. The headers just dont make a huge difference.

C
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Old 04-21-2010, 06:03 PM   #117
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Had the exact same problem with my car the first time around the weld cracked right down the middle at the collector.
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Old 04-22-2010, 02:41 PM   #118
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What psi was it hitting at 4100 Clark?
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Old 04-22-2010, 03:49 PM   #119
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off topic, What is the size of diameter of the Full-Race headers compared to Perrin and AMR?
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Old 04-23-2010, 05:04 AM   #120
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Ill trade 15 to 20 Whp for a wider and more usable power band. Goodjob by goodspeed and clark to get this problem solved I would of never thought it to be the header. Oh well a 1500 dollar mistake on my part.
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Old 04-23-2010, 06:13 AM   #121
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BW S366
Event: Dyno pull
Location: The Shop, CT
Ambient Temp: 85
Elevation: About 100?
Weather: Humid
Wheels/Tires: 225/45/17

Car: 2005 LGT
Mileage: 1200 on engine
Tuner: Jr
Dyno Info: Dyno Dynamics
Peak HP at RPM: 550whp corrected
Peak Torque at RPM: 475
Baseline hp/tq for a stock on same dyno: unk

Target Boost: 27psi
Target AFR: 12
Fuel: 93
Tranny: 04 STI 6spd
Engine/Power Modifications: 2.5L EJ257 with ACL bearings, stock crank, pauter rods, wiseco 100mms, ported heads, BC valves, springs retainers, BC 272 cams (poopy), dual walbro pumper, DW1100s, custom built 3" FMIC and dp w/ Ecutout, aquamist hfs5 w/ dual pumps and dual 1mm nozzle set up, etc
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btw, all for sale here
also the motor is for sale here built up with sleeves and better cams


Last edited by groff; 04-23-2010 at 09:01 AM. Reason: added fs threads
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Old 04-23-2010, 03:15 PM   #122
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Gear the pull was done in? And turbine wheel diameter and turbine AR?
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Old 04-23-2010, 04:10 PM   #123
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4th gear
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Old 04-26-2010, 11:09 AM   #124
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Im very excited about more and more people running BW setups and the BW hybrids out there. Just proving that you dont have to have BB to get fast spool and awesome power numbers and the best part of it all it the price is 300 to 400 dollars cheaper than there Garret brothern.
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Old 04-26-2010, 11:31 AM   #125
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Glad you are happy.. Now Put some miles on her and get it broken in. Then we can turn it up.

C
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