twin turbo rebuilt or new ones?
Hey, where did my $$$ go?
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From: Bimingham, AL
Originally posted by Resource
We really find there is no reason to convert the seals over. The major differance in the two is the dynamic seal has a very very very slight amount of less drag. Less than .0100 measured Ft/Lb which which is unnoticeable.
We really find there is no reason to convert the seals over. The major differance in the two is the dynamic seal has a very very very slight amount of less drag. Less than .0100 measured Ft/Lb which which is unnoticeable.
STEPHEN
WTB** Very Low Miles 94-95
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From: Tejas
what was the answer on whether or not the shafts get upgraded on the bistate set?
turbonetics built upgraded stock turbos for years...they no longer do it...wanna know why?...the stock shafts are way too small to handle the increased pressure caused by the larger wheel weight....thus failed turbos...and consistent breaking of the shafts which are just too thin to handle it.
stock shaft turbos also have tendency to crank out high heat....thats why I went m2...the efficiency range is higher and the dual ball bearing twins run about 25 degrees celcius cooler than the stockers. I ran my stock twins for a long time at fourteen psi...they were cooked when i pulled them apart. Id like to avoid that if i can.
j
turbonetics built upgraded stock turbos for years...they no longer do it...wanna know why?...the stock shafts are way too small to handle the increased pressure caused by the larger wheel weight....thus failed turbos...and consistent breaking of the shafts which are just too thin to handle it.
stock shaft turbos also have tendency to crank out high heat....thats why I went m2...the efficiency range is higher and the dual ball bearing twins run about 25 degrees celcius cooler than the stockers. I ran my stock twins for a long time at fourteen psi...they were cooked when i pulled them apart. Id like to avoid that if i can.
j
Last edited by artguy; May 29, 2003 at 05:07 PM.
Banned. I got OWNED!!!
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From: Saint Louis
Originally posted by SPOautos
.01 is 1%. I'd say 1% of a foot/pound extra in drag is quite a lot of extra drag on a very light weight asslymbally that is rotating at 150,000 rpms. I'd think that would increase the friction (thus heat) quite a lot.
STEPHEN
.01 is 1%. I'd say 1% of a foot/pound extra in drag is quite a lot of extra drag on a very light weight asslymbally that is rotating at 150,000 rpms. I'd think that would increase the friction (thus heat) quite a lot.
STEPHEN
Banned. I got OWNED!!!
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From: Saint Louis
Originally posted by artguy
what was the answer on whether or not the shafts get upgraded on the bistate set?
turbonetics built upgraded stock turbos for years...they no longer do it...wanna know why?...the stock shafts are way too small to handle the increased pressure caused by the larger wheel weight....thus failed turbos...and consistent breaking of the shafts which are just too thin to handle it.
stock shaft turbos also have tendency to crank out high heat....thats why I went m2...the efficiency range is higher and the dual ball bearing twins run about 25 degrees celcius cooler than the stockers. I ran my stock twins for a long time at fourteen psi...they were cooked when i pulled them apart. Id like to avoid that if i can.
j
what was the answer on whether or not the shafts get upgraded on the bistate set?
turbonetics built upgraded stock turbos for years...they no longer do it...wanna know why?...the stock shafts are way too small to handle the increased pressure caused by the larger wheel weight....thus failed turbos...and consistent breaking of the shafts which are just too thin to handle it.
stock shaft turbos also have tendency to crank out high heat....thats why I went m2...the efficiency range is higher and the dual ball bearing twins run about 25 degrees celcius cooler than the stockers. I ran my stock twins for a long time at fourteen psi...they were cooked when i pulled them apart. Id like to avoid that if i can.
j
Hey, where did my $$$ go?
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From: Bimingham, AL
Originally posted by Resource
No. If you really understood how little that is you would realize that it's virtually nothing.
No. If you really understood how little that is you would realize that it's virtually nothing.
What is this based on? Did you test the stock assy with both dynamic and carbon seals to conclude that 1% of a foot pound of drag made no difference? IF you really understand it you should have no problem explaining how it makes no difference
STEPHEN
Rotary Enthusiast
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From: Plano, TX
I think it would be best expressed in by a comparison between carbon, dynamic, and ball bearing assuming all other things being equal wheel sizes, housings, etc.
ie.
------------- 50% boost, 100% boost, Outlet temp
Carbon ---- x rpms x+a rpms xt degrees
Dynamic ---- y rpms y+b rpms yt degrees
ball bearing -- z rpms z+c rpms zt degrees
Unfortunately nobody seems to have this experience, anecdotally or otherwise, except maybe for Brian @ BNR.
Would be interesting to know. Also add a longevity column in there
ie.
------------- 50% boost, 100% boost, Outlet temp
Carbon ---- x rpms x+a rpms xt degrees
Dynamic ---- y rpms y+b rpms yt degrees
ball bearing -- z rpms z+c rpms zt degrees
Unfortunately nobody seems to have this experience, anecdotally or otherwise, except maybe for Brian @ BNR.
Would be interesting to know. Also add a longevity column in there
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From: San Lorenzo, California
Originally posted by Resource
That's why we warranty them.
That's why we warranty them.
Does the warranty cover the R&R for replacing the turbos when they break.....
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From: Mechanicsburg, PA USA
I think the BI stateturbos will be could be compared to BNRs Stage 2 turbos which I have - I was going to have him do the stage 3 but I'm selling the car - I was told by Bryan that the hp numbers would be about the same except the 3s would run cooler and have more response. I think Resource is being pretty professional through all of this so let him post his dyno sheets for some competition. I have 380 rwhp at 15 psi but have a HF cat - with a midpipe (which I would assume you'd dyno your test FD with for more power)...our cars would be more comparable.
Are you planning on running these sequential or non-seq?
I like the competition - bring on the dyno sheets
Are you planning on running these sequential or non-seq?
I like the competition - bring on the dyno sheets
Rotary Enthusiast
Joined: Oct 2002
Posts: 1,045
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From: Plano, TX
Anyone ever heard of these guys?
http://www.forcedperformance.net/
They offer rebuilds for Rx7's as well, coupled with warranties. Seem to be pretty reasonable.
Plus they are located in McKinney, TX
http://www.forcedperformance.net/
They offer rebuilds for Rx7's as well, coupled with warranties. Seem to be pretty reasonable.
Plus they are located in McKinney, TX
Last edited by Brentis; May 30, 2003 at 10:36 PM.
Glug Glug Glug Burp
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From: Scott AFB, IL
Originally posted by kwikrx7
I think the BI stateturbos will be could be compared to BNRs Stage 2 turbos which I have - I was going to have him do the stage 3 but I'm selling the car - I was told by Bryan that the hp numbers would be about the same except the 3s would run cooler and have more response. I think Resource is being pretty professional through all of this so let him post his dyno sheets for some competition. I have 380 rwhp at 15 psi but have a HF cat - with a midpipe (which I would assume you'd dyno your test FD with for more power)...our cars would be more comparable.
Are you planning on running these sequential or non-seq?
I like the competition - bring on the dyno sheets
I think the BI stateturbos will be could be compared to BNRs Stage 2 turbos which I have - I was going to have him do the stage 3 but I'm selling the car - I was told by Bryan that the hp numbers would be about the same except the 3s would run cooler and have more response. I think Resource is being pretty professional through all of this so let him post his dyno sheets for some competition. I have 380 rwhp at 15 psi but have a HF cat - with a midpipe (which I would assume you'd dyno your test FD with for more power)...our cars would be more comparable.
Are you planning on running these sequential or non-seq?
I like the competition - bring on the dyno sheets
The car will have a midpipe and the turbos are going to be full non-seq. I'll be breaking in the new motor and turbos with my PMS ECU and stock injectors (Since it is my understanding the PMS won't support aftermarket injectors) at low boost while I put together a fuel system and a PFC.
I don't think any real comparable numbers will come from a 10 or 12psi tune with stock injectors on the PMS. Though I could be wrong...
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From: Tejas
no...you arent wrong....youll put down about 310-320 to the wheels Id imagine at that low of boost...but you see you will be flowing more air so you might only get ten lbs out of it...you should be patient and do your injectors at the same time..sell that pms thingy and get a good ecu...Id wait...its going to be a hassle to retune and repull ***** to get those injectors in there...might as well wait a few weeks and do it right...right?
...larger compressor wheels have an efficiency range that is higher in the boost range...for example...both the bnrs and the m2 set seem to be the peakiest around seventeen psi. that is where the good stuff is...12lbs for me on the m2 set didnt feel any different than stock other than the spoolup times....fourteen-fifteen lbs on the other hand...zoom zoom.
dont get me wrong...im rooting for anyone who puts a good set of parts on the market for all of us...i hope they are successful...competition is good...mmm hmmm
j
...larger compressor wheels have an efficiency range that is higher in the boost range...for example...both the bnrs and the m2 set seem to be the peakiest around seventeen psi. that is where the good stuff is...12lbs for me on the m2 set didnt feel any different than stock other than the spoolup times....fourteen-fifteen lbs on the other hand...zoom zoom.
dont get me wrong...im rooting for anyone who puts a good set of parts on the market for all of us...i hope they are successful...competition is good...mmm hmmm
j
Last edited by artguy; May 31, 2003 at 02:34 AM.
Glug Glug Glug Burp
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From: Scott AFB, IL
Originally posted by artguy
you should be patient and do your injectors at the same time..sell that pms thingy and get a good ecu...Id wait...its going to be a hassle to retune and repull ***** to get those injectors in there...might as well wait a few weeks and do it right...right?
you should be patient and do your injectors at the same time..sell that pms thingy and get a good ecu...Id wait...its going to be a hassle to retune and repull ***** to get those injectors in there...might as well wait a few weeks and do it right...right?
Justin
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