4WDFrenzy Posted January 26, 2006 Share Posted January 26, 2006 I know some people have been serching for a flow chart for the VF7(RHB5) turbochargers. SO I bring tidings to you all(don't mind all the markings; one of the guys on the starlet forum added that): I found this while I was chatting on the turbo Starlet forum today. Apparently, the highest boost you can run and still be in the sweet spot on the turbo is about 13psi, but they can be pushed to about 18psi(with fuel system, exhaust, intake mods, and a large, efficient intercooler of course) before you are really out of headroom. That is considering also, that you can make it past fuel cut. Now whether the EA82T can handle that kind of boost in the long run, that is yet to be seen. Just thought this was kind of interesting. **To the Mods: I'm sorry this pic is so big!** Patrick Link to comment Share on other sites More sharing options...
naru Posted January 26, 2006 Share Posted January 26, 2006 I know some people have been serching for a flow chart for the VF7(RHB5) turbochargers. SO I bring tidings to you all I don`t think that is a VF-7 compressor map.AFAIK,compressor spec. BRL 3911E is for a VJ-11 compressor. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 26, 2006 Author Share Posted January 26, 2006 I know some people have been serching for a flow chart for the VF7(RHB5) turbochargers. SO I bring tidings to you all I don`t think that is a VF-7 compressor map.AFAIK,compressor spec. BRL 3911E is for a VJ-11 compressor. Not to be rude, but I do have enough intelligence to read and I know what I am talking about. The VJ11 and the VF7 are the same turbocharger(hence the turbocharger designation: RHB5). I have had both turbochargers at one time and compared the two side by side. The only physical differences are the compressor housing and the exhaust snail, in that each was made to fit a specific application(VF7: Subaru, VJ11: Ford Probe GT & Mazda MX6 turbo[they share the same powerplant]). The actual turbocharger cartridge is the same. An RHB5 is an RHB5 is an RHB5 no matter how you dress it up on the outside. So, this means that the flow map would be very close, if not identical. I'm sorry for being/coming across as rude. Patrick Link to comment Share on other sites More sharing options...
naru Posted January 27, 2006 Share Posted January 27, 2006 Not to be rude, but I do have enough intelligence to read and I know what I am talking about. The VJ11 and the VF7 are the same turbocharger(hence the turbocharger designation: RHB5). I have had both turbochargers at one time and compared the two side by side. The only physical differences are the compressor housing and the exhaust snail, in that each was made to fit a specific application(VF7: Subaru, VJ11: Ford Probe GT & Mazda MX6 turbo[they share the same powerplant]). The actual turbocharger cartridge is the same. An RHB5 is an RHB5 is an RHB5 no matter how you dress it up on the outside. So, this means that the flow map would be very close, if not identical. I'm sorry for being/coming across as rude. Patrick Congratulations on spotting that the replacement CHRAs are the same.They are in fact,IHI# 553T-531.The VJ5 uses this cartridge too.Good news for me,I just picked up a freebee. Note that the original cartridges weren`t identical.For instance,VF2 and VF4 EA-82 Subaru turbos and the VJ5 Mazda turbos all share the same replcement cartridge,but all originally had different trim compressor wheels.VF2-59 trim,VF4-77,VJ5-63. Anybody know what # is cast into a VF7 compressor wheel? As for an RHB5 being an RHB5,no matter what housings you have,That is not true.If it was,nobody would use the T-bird compressor.Look at the number of different RHB5 cartridges there are on this page:http://www.turbointernational.com/search_results.asp?turboModel=409 EA-81T RHB5s don`t share any rotating parts w/EA-82 RHB5s,and you certainly can`t swap housings w/o rotating parts.If you saw the wheels side by side,you wouldn`t think that they had maps that were identical or very close either. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 27, 2006 Author Share Posted January 27, 2006 So what you are saying is that I couldn't bolt the housings from one RHB5 onto another? If you say yes, you had better check your facts a bit closer. When I had the two RHB5s side by side, the looked the same. I took the compressor housings off to eyeball the compressor wheels, and swapped the Probe GT housing on just to see if it would fit. And guess what? It did. So where did you get the "you can't swap housings without rotating parts" from? And as long as the compressor blades fit the new housing without rubbing, and the new housing bolts on the same as the old one, where is the problem? The RHB5 turbo from the Probe had been rebuilt 4 months prior to the car I pulled it off of getting wrecked(I talked with the previous owner). So maybe I got some kind of hybrid or something, as I have no idea who or where he had rebuild it, but the compressor housing did fit on my VF7. And why would people not want to use the Thunderbird compressor? That is a very troubling statement. The RHB5 from the Thunderbird was(note I said "was") one of the most popular turbochargers to fab onto a Civic for a budget turbo kit. This was back when the turbo craze began. What is wrong with them? Now I do agree, however, with the RHB5 compressors having different trim specs, so you are correct in that aspect. Yes I said it. You were right and I was wrong. That had totally slipped my mind. IHI provided different trims for different applications and engine displacements. They were all made for optimal power output and performance for the engine that it was to be installed on. So you get kudo points for that. Patrick Link to comment Share on other sites More sharing options...
naru Posted January 27, 2006 Share Posted January 27, 2006 So what you are saying is that I couldn't bolt the housings from one RHB5 onto another? If you say yes, you had better check your facts a bit closer. Yes,that is what I`m saying.Only RHB5s that share replacement cartridges can swap housings.For instance,any RHB5 that uses a 553T-531 cartridge can swap housings OK. For instance EA-82 VF2s,4s,7s and Mazda VJ5s and 11s. Believe me,an ea-82 wheel won`t fit ea-81 housings on either end. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 27, 2006 Author Share Posted January 27, 2006 So what you are saying is that I couldn't bolt the housings from one RHB5 onto another? If you say yes, you had better check your facts a bit closer. Yes,that is what I`m saying.Only RHB5s that share replacement cartridges can swap housings.For instance,any RHB5 that uses a 553T-531 cartridge can swap housings OK. For instance EA-82 VF2s,4s,7s and Mazda VJ5s and 11s. Believe me,an ea-82 wheel won`t fit ea-81 housings on either end. Well last I checked, we weren't talking about a turbo from an EA-81. I have a VF7 on an EA82T. And when I tell you I put the compressor housing from the VJ11 on my turbo, I'm not lying to you. Link to comment Share on other sites More sharing options...
Phizinza Posted January 27, 2006 Share Posted January 27, 2006 I'm not too big on turbos but my brother owns a 88 TX5 turbo Telstar (MX-6, probe gt, all the same) He says a lot of people put the thunderbird air snail on there exhaust snail because it has better flow (more flow, or quicker pickup flow, or something like that.) So you are saying the subaru wrx turbo uses the same internals as the mx6 turbo? That might explain why my bros telstar flies! I really don't understand what I'm on about. lol. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 27, 2006 Author Share Posted January 27, 2006 Oh yeah, and you still didn't answer my question. What is wrong with the Turbocharger from a Thunderbird? Link to comment Share on other sites More sharing options...
naru Posted January 27, 2006 Share Posted January 27, 2006 Well last I checked, we weren't talking about a turbo from an EA-81. I have a VF7 on an EA82T. And when I tell you I put the compressor housing from the VJ11 on my turbo, I'm not lying to you. Well actually,YOU were.You said: ". An RHB5 is an RHB5 is an RHB5 no matter how you dress it up on the outside. " An EA81 RHB5 VF1 and several other RHB5s are different internally not just "on the outside". Like I said before,I believe you can sucessfully swap housings on VF2s.4s,7s, and VJ5s and 11s so,no,I don`t think you are lying. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 27, 2006 Author Share Posted January 27, 2006 Well actually,YOU were.You said: ". An RHB5 is an RHB5 is an RHB5 no matter how you dress it up on the outside. " An EA81 RHB5 VF1 and several other RHB5s are different internally not just "on the outside". Like I said before,I believe you can sucessfully swap housings on VF2s.4s,7s, and VJ5s and 11s so,no,I don`t think you are lying. Dude, did I not just appologize like 6 posts ago? Geez, I started out talking about VJ11s and VF7s, and I made no mention of the VF1. You brought that into the conversation my friend, and seem as though you can't let it go. Chill Bro! It's not that serious. Link to comment Share on other sites More sharing options...
naru Posted January 27, 2006 Share Posted January 27, 2006 Oh yeah, and you still didn't answer my question. What is wrong with the Turbocharger from a Thunderbird? I was making the point that not all RHB5 internals are the same like you said they were. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 27, 2006 Author Share Posted January 27, 2006 I was making the point that not all RHB5 internals are the same like you said they were. Well what you just said, and the statement you made earlier make no sense. Go back and read what you posted. What does," nobody would use the Thunderbird compressor," have to do with making the point of RHB5s not having the same internals? I appologized. I will not do it again. I just want to know exactly WHY nobody would use the RHB5 from a Thunderbird? It seems like a perfectly good turbo to me. Link to comment Share on other sites More sharing options...
4WDFrenzy Posted January 27, 2006 Author Share Posted January 27, 2006 As for an RHB5 being an RHB5,no matter what housings you have,That is not true.If it was,nobody would use the T-bird compressor.Look at the number of different RHB5 cartridges there are on this page:http://www.turbointernational.com/search_results.asp?turboModel=409 Here is exactly what you said. I justwant to know what your views are on this turbocharger, and what would make people not want to use the compressor? Link to comment Share on other sites More sharing options...
Phizinza Posted January 27, 2006 Share Posted January 27, 2006 Maybe he means if a "RHB5 being an RHB5,no matter what housings you have" you wouldn't bother getting a Thunderbird turbo because it would be the same as the one you already have? I am pretty sure you can't just change the rotor out of a thunderbird turbo into a mx6 turbo, you need the housing too. But I'm not sure, just going on what my brother read on mx6.com Link to comment Share on other sites More sharing options...
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