I have the BSR tune and a Magnaflow cat-back. The BSR tune made a HUGE difference. I kind of wish I did not have the Magnaflow cat back. Not because of quality etc... It sounds great. BUT, I am getting more into autocross and would like to put a hitch on to tow a small tire trailer. The design of the Magnaflow muffler makes it very difficult to add a hitch. I think either Solo or RPI make one that would allow a hitch much easier. Other than that, I don't think there are huge differences between makes. they are all of pretty good quality from what I have read.
The CAI is an unnecessary expense from what I have read. It appears the stock box works very well. As far as total HP? That ALWAYS is an area of conflict on this board if BSR is mentioned. Anyway, BSR reports that stock with the BSR tune = 312 HP at the crank. I have no reason to doubt it. My GXP is a blast with the tune.
A BSR Stage Two which is set up to be used with the upgraded exhaust and IC is supposed to be out soon. I think there are several BSR users with aftermarket exhaust and IC upgrades on this forum. They may pipe up. Enjoy!!
Last edited by Drivetime : 11-18-2007 at 11:37 AM.
About 250 at the rear wheel, all of which will come from the BSR, the other stuff will improve acceleration and torque and lengthen the power band but not so much on the HP. GM does not make a CAI for the GXP. The cat back is a Borla and works fine it's just expensive. There are a ton of options and this subject has been covered very well. Search is your friend.
__________________ Red Bull Drift Team 2008
Solo Mach and High Flow Cat
Dejon Intercooler, Intake Elbow, BOV spring
Wester's Garage RACE tune II
JPM custom shifter.
Barney Juice with Militec-1
GM Auto-dimming mirror with OnStar and maplights
Rhys Millen Racing, RMR Style Bar. Peak RWHP 286.3, Peak Torque 313 ft/lbs.
SSR Type C wheels, Bridgestone Potenza RE-01's
DDM Works PINK Breastplate
Location: Rosamond, CA - Home of Willow Springs Raceway
Quote:
The cat back is a Borla and works fine it's just expensive.
Not to mention it's the same inner diameter as the stock GXP exhaust. Not worth buying, IMO. Also, the GM exhaust is for the NA Sol not the GXP although it fits. Solo's GXP exhausts are larger diameter (3"), not that expensive, great quality, and the only exhausts to actually make some power (around 16whp). The Magnaflow's GXP exhaust is larger than stock (3") and excellent quality also.
__________________
2007 Cool GXP with Darkside Top, 5 spd, Ebony Cloth, Monsoon with Single CD, Sport Pedals, XM, A/C
Mods - Solo Street/Race Exhaust, K&N Drop-in Air Filter, EDAL
Here's a Dyno Hahn Racecraft did with the BSR tune showing 267 WHP. There will be some 'independent' dyno's showing up soon. Like Lil Goat said.... Do some searches, this has been discussed, disputed, argued about etc.. at great length. Good luck.
This car is kind of funny, the exhaust will add HP the intercooler will add HP then you add the tune and they all get rolled in together, on a stock car the BSR gives about a 40 hp boost on a moded car it gives about a 30 hp boost because you have already increased hp with the other mods. The Westers tune does pretty much the same thing. The other thing to look at is the Dyno used, Hahn uses a Dynojet, they are at 5 to 10% higher than a Dyno dynamics. The stock GXP runs between 216 and 226 on a Dynojet, about 206 to 212 on Dyno Dynamics. They are both just reference numbers, neither mean squat. The before and after is all that matters, what is the gain from the mods. The owner dyno runs I have seen for the BSR put it at about 250 on a Dyno Dynamics. The BSR has a lot of sweet advantages no one else has. The other tunes from PCM4less, Werks and Westers are all HP tuner based and more of a pain. Werks is claiming 285 at the rear wheels with there soon to be released tune, that is with there intercooler and exhaust. Lots and lots of options.
__________________ Red Bull Drift Team 2008
Solo Mach and High Flow Cat
Dejon Intercooler, Intake Elbow, BOV spring
Wester's Garage RACE tune II
JPM custom shifter.
Barney Juice with Militec-1
GM Auto-dimming mirror with OnStar and maplights
Rhys Millen Racing, RMR Style Bar. Peak RWHP 286.3, Peak Torque 313 ft/lbs.
SSR Type C wheels, Bridgestone Potenza RE-01's
DDM Works PINK Breastplate
I have the BSR tune and a Magnaflow cat-back. The BSR tune made a HUGE difference. I kind of wish I did not have the Magnaflow cat back. Not because of quality etc... It sounds great. BUT, I am getting more into autocross and would like to put a hitch on to tow a small tire trailer. The design of the Magnaflow muffler makes it very difficult to add a hitch.
I have a Magnaflow and you're right that it's hard to find an off-the-shelf hitch that will fit. However I had one custom-made by a local shop and that hitch fits just fine and only cost about $50 more.
I also found a recent dyno post from Hahn showing the results from stock, stock + BSR tune, and BSR tune plus Hahn intercooler. If I remember correctly, the intercooler added about another 10 hp beyond the tune itself.
I ordered the tune this AM, and I'll run with just that for a while. After that it's probably shocks and springs, then intercooler, then catback as funding permits.
i too am considering the bsr tune.. . but man....900+ bucks for that tuner... but you are paying for the tune parameters after all... they got you coming and going. wonder if a jar of vaseline comes with it.....hahhahaahha
seriously though..has there been any problems pop up as a result of the tune? premature component failures or emission sets? thanks.
I have the BSR tune, a Dejon CAI and a Magnaflow catback. I also have the Dejon IC pipes. My car was on a Dyno Dynamics dyno last week.
I can guess at the HP and torque at the crank, but I have independant documentation that says that I have a 30WHP gain with the BSR tune from Hahn.
I have the Hahn intercooler on order and I would guess that another Dyno Dynamics test after that install would put my car at around 255WHP .
Might not sound like much, but there has been nobody but the vendors posting dyno results on the BSR tune. Until now.
P.S. I have never had a CEL after any of my mods and make sure you crank down all the IC clamps before your first run with the BSR tune.
Bob O.
I have the Westers tune and actually saw a slight decrease in rwhp when I installed the intercooler, about 2 HP but I have a much flatter torque curve and power comes on earlier and drops off later, moved peak hp from 5200 to 5800. I have a newer tune now that put me up at 267 on a DD dyno. I will be on the dyno again this weekend, with a newer tune to flatten the torque curve a little more. I don't expect much of a change in hp.
__________________ Red Bull Drift Team 2008
Solo Mach and High Flow Cat
Dejon Intercooler, Intake Elbow, BOV spring
Wester's Garage RACE tune II
JPM custom shifter.
Barney Juice with Militec-1
GM Auto-dimming mirror with OnStar and maplights
Rhys Millen Racing, RMR Style Bar. Peak RWHP 286.3, Peak Torque 313 ft/lbs.
SSR Type C wheels, Bridgestone Potenza RE-01's
DDM Works PINK Breastplate
seriously though..has there been any problems pop up as a result of the tune? premature component failures or emission sets? thanks.
I have had the tune for a few months now and have not had any problems. I cannot speak to any long term effects, but imagine that any modification that cranks up the output of an engine has the potential to cause more wear on an engine.
I have really enjoyed the BSR tune and would not hesitate to buy it again.
I have the Westers tune and actually saw a slight decrease in rwhp when I installed the intercooler, about 2 HP but I have a much flatter torque curve and power comes on earlier and drops off later, moved peak hp from 5200 to 5800. I have a newer tune now that put me up at 267 on a DD dyno. I will be on the dyno again this weekend, with a newer tune to flatten the torque curve a little more. I don't expect much of a change in hp.
was it back to back on the same day? I can change 10hp on my dyno by strapping to to the roll harder.
2hp difference isnt typically a repeatable result. Heatsoak,humdity etc can all have much more than a 2hp difference on the same car, same day.
