Powerdyne BD11A + intercooler bad, refresh my memory please.

[grayman]

I just wanted a refresher cuz its been a while. car has been perfect for couple years so that kinda put me out of practice with these theories and knowledge.

Has anyone had success with that companies 'race rigging' of the bd11a (the fancy bearings, shim, blower shell venting, and/or something with a washer or spacer to keep the internal belt from wondering?) AND THEN using an air-air intercooler? If that race rigging actualy works then smaller pulley could be used to make up for the psi drop from the intercooler....???? (see, told you im rusty)

Background: Wont be going beyond 6psi (bigger injectors + modded fuel rail, etc. is too big of a hassle if the bd11a cant be safely coupled to an air-air IC as a dependable daily driver, IMO) unless needed modifications to my current system are atleast somewhat affordable, benificial and dependable. Yes, i know hi performance = hi stress but i think most of you know what i mean when i say i want to keep my modded car as my daily driver. (if i wanted a weekend only car i would not be modding an iron block v6)
I like the sleeper aspect of the BD11a vs the loudness of the gear driven XB1A.

As for water injection as an intake air cooler: easier said than done. the benifits are far reduced (i understand) if i were to plumb the water nozzle into the upper intake manifold rather than relocating the MAF Sensor closer to the blower so as to allow placing the water nozzle further up stream from the TB rather than behind it. MAFs can be expensive, combined with cost of water injection system and im half way to stage two cylinder heads.

Please refresh my memory or share your experience on these matters. searching mainly yields other peoples similar questions and im mainly wondering if anyone has performed these mods to their powerdyne with or w/o success. TIA, g

[ssms5411]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

If I still had mine I wouldn't of wasted my money with the 928 rebuild venting and shimming. I should of just kept it at a 2.8-2.9 grooved pulley and had a soilid 6-7 psi, then add nitrous to make up for any extra power I wanted. I think the PD is good if you keep it close to stock form but when you start messing with it you'll run into problems like I did. Stock PD and nitrous does work well together look at Shirl's times. Plus you won't have to keep on replacing bearings and internal belts. Thats my input on the PD.

[97rs4life]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

we made a custom powerdyne setup for my brother's car and it has turned out great. Solid 7psi with no belt slippage with the tensioner we setup. He just bought a air-to-air intercooler that we are going to probably try and make work now. We also have a smaller pulley here as well.

You wouldn't have to upgrade the fuel rail at all, just the gtp injectors for 9psi and a walbro pump and it is fine.

But yea I would just add some nitrous if I were you if you see a good 6-7psi right now.

[97rs4life]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

BTW, welcome back to the site!

[Mighty Thor]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

Hey Grayman, welcome back.

I don't recommend air to air because of the pressure it will put on the blower. I do recommend air to water like the Vortech because it is less restrictive. Or you could do water injection.

[dmw319]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

If I still had mine I wouldn't of wasted my money with the 928 rebuild venting and shimming. I should of just kept it at a 2.8-2.9 grooved pulley and had a soilid 6-7 psi, then add nitrous to make up for any extra power I wanted. I think the PD is good if you keep it close to stock form but when you start messing with it you'll run into problems like I did. Stock PD and nitrous does work well together look at Shirl's times. Plus you won't have to keep on replacing bearings and internal belts. Thats my input on the PD.

agreed. i would keep what you have and add a small dry shot :)

[Shodown]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

agreed. i would keep what you have and add a small dry shot :)

I have doubts that an FMU and stock injectors will be able to safely sustain a dry shot + 6psi. I'd go with bigger injectors but, he said they were too big of a hassle.

Wet shot would be better IF nitrous was a serious consideration.

[97rs4life]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

yea if going nitrous I would do wet if sticking with stock injectors as to not tax them as much. You could also then make it a richer fuel jet and add some fuel if you are running lean with the combo

[grayman]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

thx guys,
Im not 'against' NO2, i just prefer a more passive system. I also have no experience with NO2 other than the difference between wet and dry. ready general stickies and articles realy gives me little info on how to hook a system up to my car, with its particular FI system and what not. I havent gotten too deep into researching no2 cuz as i said i want to keep the system passive if at all possible. water/meth injection seems more passive to me in that it can just stay on all the time and i can refill as needed in my own garage rather than making trips to the bottle store, etc. Was hoping to not be the powerdyne/water injection prototype but it seems nobody else has done it jet. Plumbing the water jet post maf (into the upper manifold) reduces the effectiveness of the water/meth shot as well. I may just have to bite the bullet and by a ls1 maff or something so that i can relocate the maf closer to the blower and give me room to put the water nozzle right after the maf, in the discharge pipe, and before the IAT sensor. oh yea, putting the nozzle in the upper intake puts it PAST the IAT sensor so how exactly would i tune for those reduced temps if the IAT sees 'pre water injection' temps?
some of these questions seem noobish, i know, but i cant seem to find an example of any of them on othere members cars, nor write ups, etc.

Im half tempted to make a custom hi flow intercooler.

side note: has there been an advance in something like quick connect wire couplers to go from post 1999 delphi mini injectors back down to the shorter pre 1999 bosch style injectors? i gave up on finding actual delphi mini injectors of a larger flow rate. (i know i could splice in injector connectors but i dont want to hack up my harness if at all possible)

[dmw319]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

I have doubts that an FMU and stock injectors will be able to safely sustain a dry shot + 6psi. I'd go with bigger injectors but, he said they were too big of a hassle.

Wet shot would be better IF nitrous was a serious consideration.

oh woops, i didnt know he still had stock injectors. screw the FMU. get 36lb injectors and a tune with a small shot on it.


why whould a wet shot be better?

[Shodown]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

why whould a wet shot be better?

Because he could simply adjust the AFR by putting in a different sized fuel jet. A wet kit would be better IF he were to stick with the stock injectors and FMU. If he went with bigger injectors, ditched the FMU and tuned via HPT then a dry shot would be fine.

[97rs4life]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

zzp sells adapters to go from the new style injectors to the shorties. Also grab a 95-99 fuel rail or you would have to modify yours for the shorter injectors.

There has been people that have ran meth with the powerdyne. Most turbo guys are using it though right now.

[ssms5411]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

I had a coolingmist setup on mine for a little bit, easy to install. Just make sure it is after the maf and you will have no problems with it. I think I had a M2 or M3 nozzel in there when I had mine going. But if your looking for power, nitrous is perfect. I also didn't know you had stock injectors. I ran 36lb injectors with mine with no problems, I think you'll like it better without the FMU and using Hptuners. You will have a better gain in performance.

[Shodown]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

As for water injection as an intake air cooler: easier said than done. the benifits are far reduced (i understand) if i were to plumb the water nozzle into the upper intake manifold rather than relocating the MAF Sensor closer to the blower so as to allow placing the water nozzle further up stream from the TB rather than behind it. MAFs can be expensive

water/meth injection seems more passive to me in that it can just stay on all the time and i can refill as needed in my own garage rather than making trips to the bottle store, etc. Was hoping to not be the powerdyne/water injection prototype but it seems nobody else has done it jet. Plumbing the water jet post maf (into the upper manifold) reduces the effectiveness of the water/meth shot as well. I may just have to bite the bullet and by a ls1 maff or something so that i can relocate the maf closer to the blower and give me room to put the water nozzle right after the maf, in the discharge pipe, and before the IAT sensor. oh yea, putting the nozzle in the upper intake puts it PAST the IAT sensor so how exactly would i tune for those reduced temps if the IAT sees 'pre water injection' temps?

You will want the meth/water injection placed AFTER the MAF in the upper intake manifold not before the MAF. Its not supposed to spray over the IAT.

You dont need an LT1 or LS1 MAF either.

Here are a few pics of guys who have meth on their turbo cars...

You can see the nozzle/hose just aft of the TB in both of these pics (different cars):

[techsan23]

Re: Powerdyne BD11A + intercooler bad, refresh my memory please.

I put an ls1 maf sensor closer to the powerdyne unit, and plumbed the meth jet just before the throttle body. I dont have tuners yet, so I dont know how it is affecting things. I have not noticed any diff while driving.