Power gains from Buschur Ported Exhuast Manifold
i have the b/r ported stock manifold, 10.5 hotside, t/b and i/m. i noticed more of a gain then i expected. im supper pleased with the job and what i got from it. and i dont even have the best of the best parts as my other mods. so i am with dave here. it works. and with the right parts it works even better. im slowly converting. lol
blueevo, you gained nothing from those three parts, my question is, what downpipe, cat and catback do you have?
Making power is quite simple, just look at the threads we have been posting lately.
I was just telling someone the other day I can just about look at an EVO now and tell you if it is going to make good power or not.
Here is the combination: IN THE ORDER IT HAS TO BE DONE.
FREE flowing catback, no resonator, no reducers, completely 3" through the mufflers, no baffles and last no extreme bends
OFFROAD pipe, 3"
3" downpipe, least bends possible, no reducers, no flex joint.
Now if you have that the engine can get it's exhaust gases out. Next parts needed:
SS 02 housing. I have tested NUMEROUS housings now. Ported stock housings, W housing, I housing and the SS housing we buy and sell. The one we buy and sell has performed the best and has proven itself on every car it has gone on that I can remember.
10.5 housing. There are two versions of this housing. Both have their own benefits to making power and controlling boost. Both outflow the 9.8 housing. Port match it to the 02 housing and the manifold gasket.
Last thing that needs to be addressed in the exhaust is the exhaust manifold. Best performing part available is the Full Race header for the stock turbo. It will make about 5-7 more whp than our ported stock manifold. Next choice is a PROPERLY ported stock manifold. No other header I have tested will outperform a PROPERLY ported stock manifold. I have seen some pretty funny things when it comes to porting your manifold. Some would for sure loose power. No I am not giving porting classes or advise.
IF you do not have a downpipe/offroad pipe/catback that is EXTREMELY HIGH FLOWING, then don't waste your money buying an 02 housing, 10.5 and porting your manifold, if it can't flow out of the exhaust system putting those parts on will not gain power.
Most guys who add those three parts that don't gain power have a crap turbo back exhaust, easy to explain.
Frankly, this information isn't out there for discussion, I've proven it so many times at this point I can tell you the above is fact and the end of discussion.
I have offered numerous customers the "bet". I say, "The problem with your car is "this". If I put "this" part on and it doesn't gain power like I say it will you can have the part, tuning and dyno time free." They say go ahead and install the part. I haven't had to give away many parts. I can think of one guy who we just could not make more power on, Evolutionary, he is on these boards.
The intake/tb also make great power. On average 15 whp. Tested it over and over. If you aren't making those gains chances are you have a restriction elsewhere just like the exhaust system. Like maybe the stock MAF, a poor FMIC, crappy I/C pipes, a boost leak, a BOV leaking, a poor stock cylinder head (some are better than others).
You may find that your boost drops doing some of these mods as now the engine is breathing better it is harder to keep full of air.
If the ported intake/TB didn't help I wouldn't be using them on these 550+whp builds we are turning out constantly.
As of right now the 4 quickest/fastest Green turbo cars all have these mods above on them. Curt's, mine, Bobby's and Trevors. In the next few weeks more are coming and a few of these will bust into the 10's.
You have to get air into and out of the engine FREELY. Any restriction will kill the power, plain and simple.
Look at these 450+ (even 525) whp numbers on pump gas, big turbos with big non restrictive turbine wheels, big FMIC, well designed i/c pipes, ported stock intakes and 65mm TB's.
It works. You just have to get it right. One crap part can ruin a car, multiple crap parts are sure to ruin it.
Making power is quite simple, just look at the threads we have been posting lately.
I was just telling someone the other day I can just about look at an EVO now and tell you if it is going to make good power or not.
Here is the combination: IN THE ORDER IT HAS TO BE DONE.
FREE flowing catback, no resonator, no reducers, completely 3" through the mufflers, no baffles and last no extreme bends
OFFROAD pipe, 3"
3" downpipe, least bends possible, no reducers, no flex joint.
Now if you have that the engine can get it's exhaust gases out. Next parts needed:
SS 02 housing. I have tested NUMEROUS housings now. Ported stock housings, W housing, I housing and the SS housing we buy and sell. The one we buy and sell has performed the best and has proven itself on every car it has gone on that I can remember.
10.5 housing. There are two versions of this housing. Both have their own benefits to making power and controlling boost. Both outflow the 9.8 housing. Port match it to the 02 housing and the manifold gasket.
Last thing that needs to be addressed in the exhaust is the exhaust manifold. Best performing part available is the Full Race header for the stock turbo. It will make about 5-7 more whp than our ported stock manifold. Next choice is a PROPERLY ported stock manifold. No other header I have tested will outperform a PROPERLY ported stock manifold. I have seen some pretty funny things when it comes to porting your manifold. Some would for sure loose power. No I am not giving porting classes or advise.
IF you do not have a downpipe/offroad pipe/catback that is EXTREMELY HIGH FLOWING, then don't waste your money buying an 02 housing, 10.5 and porting your manifold, if it can't flow out of the exhaust system putting those parts on will not gain power.
Most guys who add those three parts that don't gain power have a crap turbo back exhaust, easy to explain.
Frankly, this information isn't out there for discussion, I've proven it so many times at this point I can tell you the above is fact and the end of discussion.
I have offered numerous customers the "bet". I say, "The problem with your car is "this". If I put "this" part on and it doesn't gain power like I say it will you can have the part, tuning and dyno time free." They say go ahead and install the part. I haven't had to give away many parts. I can think of one guy who we just could not make more power on, Evolutionary, he is on these boards.
The intake/tb also make great power. On average 15 whp. Tested it over and over. If you aren't making those gains chances are you have a restriction elsewhere just like the exhaust system. Like maybe the stock MAF, a poor FMIC, crappy I/C pipes, a boost leak, a BOV leaking, a poor stock cylinder head (some are better than others).
You may find that your boost drops doing some of these mods as now the engine is breathing better it is harder to keep full of air.
If the ported intake/TB didn't help I wouldn't be using them on these 550+whp builds we are turning out constantly.
As of right now the 4 quickest/fastest Green turbo cars all have these mods above on them. Curt's, mine, Bobby's and Trevors. In the next few weeks more are coming and a few of these will bust into the 10's.
You have to get air into and out of the engine FREELY. Any restriction will kill the power, plain and simple.
Look at these 450+ (even 525) whp numbers on pump gas, big turbos with big non restrictive turbine wheels, big FMIC, well designed i/c pipes, ported stock intakes and 65mm TB's.
It works. You just have to get it right. One crap part can ruin a car, multiple crap parts are sure to ruin it.
Dave,
back when I was on my stock turbo set-up I was using a Espelir 2.75" DP, an Ebay 3" Test pipe, and a 3" JIC Spartan catback exhaust. From what I remember the flange that connects to the cat back had a slight taper.... and the cat back also had a resonator.......but I know the muffler was a straight thru, with 3" piping from the flange back.
Now on my AMS 50 Trim set-up I'm using the full 3" AMS Turboback set-up.....
I dont doubt your ported OEM intake manifold and t-body at all, as a matter of fact I'll have you do it for me when I'm financially ready to drop my car off at your shop to do the BR stage 3 2.3L block, and stage 3 race head, GT37R, and one of your bushwacker trannies....other than that I already have all the other supporting mods....
My theory just got backed up Blue, thanks. As you can see, the exhaust combo on your car was, let's say, not ideal. If you have a restriction down stream from something that is suppose to flow more, then you will gain very little or maybe even nothing.
Good to hear you are getting ready to go nuts with the car
Good to hear you are getting ready to go nuts with the car
Tym has done all of the work on the car (I'm pretty confident he knows what to port properly) -SS O2 housing & PPI 65 mm TB
I will be at Norwalk Monday & hopefully see at least a couple of 10's w/ the Green
So Dave, how well does the car run on the stock ecu w/the ported/coated intake mani and 65mm throttle body? Looking on finishing up my setup for my green within the next month or so. Still gotta grab a new Bov in order to run some race gas. Currently using the stock MR, holding 24psi.
Hey Dave I have a Buschur Magnaflow TBE (BR stage 1) will the Magnaflow flow enough (since it's 3") for a ported manifold, 10.5, and 02 housing or do I need to get the bullet?
Last edited by 5k6; May 10, 2007 at 02:51 PM.
No doubt about it, i should be looking into a standalone, but since this is my only car and my IM expires this year, i'm planning on running the stock ecu till i can get a beater for the winter months. Haha, read that AEM EMS needs to be properly tuned to weather as well and where i'm at, we don't have a certified AEM tuner. We have EcuTek but thats it. Looking into those times and everyone in the 10's are on standalones. Dave i'm going to shoot you a pm about the intake mani and tb for pricing, thanks.
Suck A$$
Well, good data would mean each piece dynoed, and there are 6 different combinations, and most people don't really want to do that. Usually everyone throws this stuff on all at one. DB has posted results of this, but it was awhile ago.
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