403ci reusing stock manifolds
*LS2 403 built by Xtreme Horsepower, 4" forged eagle crank, forged eagle H beam rods, ARP rod bolts, ARP main bolts, 4.005" wiseco pistons -8CC, rings file fitted for N20, everthing was balanced blue printed, clearance, etc. I was told CR on the sb is 10.8:1 if i were using stock LS1 heads unmilled.
*Dart 225cc/80cc Stg3 hand ported and hand finished bob at precision porting and coatings, coated, 2.055/1.60, 62cc chambers, 314@.600, patriot gold dual springs
*ARP head bolts, ARP crank bolt,
*powebond 25% underdriven pulley
*DTP STG2 23X/24X lift, .60x/.60x, 112+2, installed -6 Daves total performance in Ohio
*DTP ported fast 90 Daves total performance in Ohio
*S2 ported LS2 90 www.s2performance.net
*billet double roller timing set, LS2 lifters, comp push rods, LS6 rockers, 42# SVO injectors, vortex true ram air, BPP carbon fiber air bridge, corsa cat back
reusing stock C5 Z06 clutch for now it handled 518/459 with the blower just fine for 2k miles and then the LS6 popped.
i ran out of money needed to finish the car ASAP so im running stock manifolds and H-pipe for about a month.
The last motor similar to mine went 534/491 with kooks 1 7/8, auto and 12 bolt with 4:10 gears.
SO how much power am I leaving out there by reusing the stock manifolds and h-pipe?
40-50-60 whp??? torque??
what do you figure it will make?
what im expecting 450/450. this may sound crazy but id be happy with that for now since i havent drove the car since 12/22/05.
Last edited by Blown04Z06; Oct 23, 2006 at 02:37 AM.
A big thanks goes out to Daniel/Scott/Joe of SimplequickRacing for making this work for me. The car drives like a baby cam car and pulls like hell through all gears. I can put around at 1300rpm in 6th no problem.
408 Built by Erik @ HPE
8cc dish Weisco's
Stock 241 heads
10.96:1 Comp.
244/248 612/615 on 115 XE-R Lobe
Though an M6
LS6 Intake
Home Ported TB
Pacesetter Headers
True Duals
SD Tuning by SimplequickRacing
Put 468.8/460.8 down with somewhere near 300 on the clock.
The graph I have a picture of currently is a few shy of that.

honestly if my car makes power the broad like this 408 did ill be extremely happy with it. mod wise i have this guy beat, im just missing headers.
Last edited by Blown04Z06; Oct 15, 2006 at 09:50 PM.
so anyway... im pretty excited. my eyes watered up a little bit when i heard the snap crackle popping of the exhaust note from the cam that is in it. it sounded damn good considering it was idling on its own without missing a beat. the tune that is in it was for a Ati P1 blower with 38lbs injectors.
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after mark shanner is done tuning my car, no one else will ever touch the tune! you would have to meet him and really listen to why he does what he does, others may disagree with his thought process. I have Zero knock retard and its running up to 31.5 degrees of timing on 93 octane. id say that is pretty impressive. and yes the kock sensors are working cause in one situation he made some adjustments just to see if it would knock and then put them back where they were.
i have Zero oil consumption issues with the dart's. i have none of the problems other people have experienced with their LS2's.
ill get it dyno'd maybe next week, after we both are satisfied with the tune. he really takes his time and is wanting me(the customer) satisfied with the tune.
Last edited by Blown04Z06; Oct 22, 2006 at 11:04 PM.
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Mild port Darts have flowed approx 340+ cfm and full ports in the 350-360 cfm range (say like a TEA stage 3 port on a Dart head).
Not criticizing but that is pretty much a cleaned up stock Dart head your running.
Last edited by Blown04Z06; Oct 23, 2006 at 02:40 AM.

