black bnr32

http://www.modified.com/tech/modp-1102-exhaust-test-tech/index.html not sure how important ground clearance is to you, but its something to consider. my 4" system has about 3" of clearance at the rear axle area.

571awhp kind of sounds like 3582R territory

gotta be sure about valve-piston clearance...you might be limited in valve lift

ask him what the Ra of the head and block were. apparently you want under 20 Ra when using a metal head gasket. mls gaskets also need time to settle before their final tourque

I'm in the process of custom right now with my GTR, and 'top of the line' bolt on with my BMW. So far I'm happier with the custom system on my GTR. A couple other pluses with custom: -better fitment (at least it should be with a decent fabricator) -v-band flanges -extra features such as 02 bungs

just curious, how long on the dyno did it take for the re-tune? a couple hours maybe?

http://www.supramania.com/forums/showthread.php?101230-Branch-resonators-ways-of-reducing-exhaust-drone

consider integrating a hemholtz chamber or a hidden apexi valve. dynomax makes an integrated mechanical valve muffler that may 'pass'. also consider adding in a short dual exhaust section with an integrated x-pipe for sound wave cancelation purposes. another idea is a short section of unequal length dual pipes (more sound wave cancelation stuff). i suspect you were recommended using a resonator (instead of a muffler) for sound quality rather than quantity.

just stay in closed loop until you get a re-tune, and you should be perfectly safe.

a journal bearing Precision would be a good, cost effective option.

running mafs or no? makes a big difference in the 'flexibility' of the tune.

there's a group buy for the haltech pro on gtrcanada

a gtx35 result on a turbo bmw from the usa: http://forums.bimmerforums.com/forum/showthread.php?t=1823611

excellent wastegate placement on those cars! So Geoff, after your first outing, any regrets on your choice of turbo size and rear turbine size? Any plans to test different turbo/turbine combos on this car?

looks like peak tq is about 555ftlbs at 4300 rpm on bp98. very nice.

Hey gav, can you please confirm your diff ratio and tire size? i'd like to plot your tq curve with rpm it looks like you have about 504 ftlbs at 3800 rpm at 23psi on bp98. oh my.

hot damn. your spool is comparatively very good, imo. what cams? dumps? boost control info? timing?

full boost at 4400rpm-ish?

block pcv block intake hoses from cam covers to check valve, check valve to exhaust http://vibrantperformance.com/catalog/index.php?cPath=1022_1070_1340

try a different boost gauge

try porting your wastegate port, and smooth the path into it

I have 3 .86 a/r 76 trim turbine housings to fit the 2860r and 2871r, if anybody needs. standard, non-rb26 5 bolt outlets.

Paul, Do you have any good photos of your exhaust system? Specifically, the front pipe. You run a dual 3 inch to single 4 inch, correct?

well then it IS ideal

anybody run a dynomax vt?