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-   -   my n/a supercharging project complete (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/my-n-supercharging-project-complete-289791/)

Kenku 04-21-04 12:09 PM

Okay, I'm a latecomer to the thread.

Cool idea, and good job making it all yourself for so little money! That's the whole spirit of innovation, trying new ideas for a given result.

You know there's stuff that can be improved. I know there's stuff that can be improved. Some other people know it can be improved too... and then some others seem to not get that, which kind of scares me, but oh well. :D

Not how I'd do things. But that's personal choice, and I applaud you doing this from scratch.

pyrojunkie 04-21-04 12:44 PM


Originally posted by wozzoom
Skip the air pump. If you want to keep the 6-ports operating, then all you have to do is plumb them into the intake... When the SC builds boost of 1-2 PSI in the intake, the 6-ports will open. When there is not boost, the ports will close. Done.
With the supercharger making boost so quickly wouldn't it be the same just to wire open the ports?


Originally posted by wozzoom
Mounting the SC on the drivers side seems to be a move in the right direction, just not sure if we can get it to fit there... I'm waiting for my M90 to get here so I can see.
Actually it seems very logical use of space to those who already don't have power steering :D

DEZERTE 04-21-04 02:01 PM

[QUOTE]Originally posted by pyrojunkie
[B]With the supercharger making boost so quickly wouldn't it be the same just to wire open the ports?

Damn straight.

wozzoom 04-21-04 02:30 PM

[QUOTE]Originally posted by DEZERTE
[B]

Originally posted by pyrojunkie
With the supercharger making boost so quickly wouldn't it be the same just to wire open the ports?

Damn straight.

Until someone shows a dyno run WITH A SUPERCHARGER and the ports operating vs. ports wired open, this is speculation. So I'll disagree with DEZERTE.

The person that posted the question wanted to know how to operate the ports...I can't think of an easier way to do so.

DEZERTE 04-21-04 03:36 PM

pully?
 
Whered u get the pully you used for the SC?

Bauer778 04-21-04 03:49 PM

..

Tsi_Xtreme 04-21-04 03:52 PM

Heres a good question... I'm not sure if that type of supercharger needs oil or not, if so did you tap a oil line?

Bauer778 04-21-04 03:53 PM


Originally posted by zbrown


The pulley i had machined at a place where they rebuild electric motors. I went there because since the s/c has a straight shaft just like electric motors and not a tapered one i figured he could set me up with some thing. All he had to do was drill the shaft hole out slightly and cut a different sized key into a pulley he had on hand.




Bauer778 04-21-04 03:54 PM

An oil line does not need to be run

comeonstart 04-21-04 04:10 PM

Im late to this thread, I am on the search for an S/C to blowthrough my carb, I never knew it could be done like that. Great Job

ronyrx7 04-21-04 05:06 PM

this is way to long write up and can this thread 17 pages wow

fc3skid 04-21-04 05:57 PM


Originally posted by zbrown
I am using the pulley that was used for the smog pump.
If he is using the smog pump pulley, what did he get machined to use on the SC?

fc3skid 04-21-04 06:00 PM

hey DCRotor, did u make the drawings for the other pieces? The first one is awesome.

LeeTheSlacker 04-21-04 07:29 PM

woudlnt putting a turbo intake manifold on a na block take a lot of work? I mean the 6ports get in the way right? Or have a missed a thread where its been done?

V8kilr 04-21-04 07:37 PM


Originally posted by hIGGI
Impressive ! :D

Maybe if you get the dimensions You could cast or make some of these parts and sell on your website.

Drifter101 04-21-04 11:36 PM

I'm so doing this :D thanks for everything, keep you updated

hotty 04-21-04 11:41 PM

I have a few questions as was posted. I know the 89-95 SC tbirds and cougar xr7's are the donor cars for m90's that are proven to work, HOWEVER, are the 3.8 mustangV6 m90's the same?? If so, that would open up a lot more donor cars.. wait a minute.. Why would they be different? I am assuming that they are the same from just thinking about it, since both are ford.. and both m90's on the ford.
Also, since it hasnt been really mentioned much, I know the GSL-SE's injectors are larger, and therefore in theory would be able to handle more hp, and consequently more boost.
I already have my 5/6th ports wired wide open, and have a RB race header, 2.5" straightpiping.. so technically there are few restrictions there. I would also look into an FMIC or TMIC just to make sure things are safer, cooler intake charge, and possibly gain a bit more hp. Also, I have my air conditioning pump removed, and there is enough space there I imagine. I assume that a 1.75 overdrive pulley would be great so that at 2300rpm the S/C is running at a favourable ~4000rpm, and at 7000rpm the S/C is at ~12,000rpm, and if you wish to push it a bit more.. 8000rpm would be the 14,000 S/C redline.
If I was to do this, I would also try to vent the hood slightly to keep things a bit cooler as well.

PS.. you guys have to remember to keep this thread uncluttered. I see a lot of bs crap, and it would be great if you tried to post everything at once so that it isnt so big.. I just read through all 17 pages tonite.
Daryl

RETed 04-21-04 11:44 PM


Originally posted by hotty
I have a few questions as was posted. I know the 89-95 SC tbirds and cougar xr7's are the donor cars for m90's that are proven to work, HOWEVER, are the 3.8 mustangV6 m90's the same??
When did they makes these???


-Ted

hotty 04-22-04 12:16 AM

the 3.8L m90's i can find on ebay are aftermarket for a mustang I assume, such as the 3.8L vortech S/C .. I was just going on a whim of what someone on the 16th page posted about seeing them on ebay. HOWEVER.. there is an m90 from a 2003 Grand Prix GTP.. I am wondering if these are very similar to the tbird s/c's .. anyone?
I am assuming yes.. because the housings do not look molded as was suggested about the 3.8L buick S/C's.

nonameo 04-22-04 12:21 AM


Originally posted by hotty
I have a few questions as was posted. I know the 89-95 SC tbirds and cougar xr7's are the donor cars for m90's that are proven to work, HOWEVER, are the 3.8 mustangV6 m90's the same?? If so, that would open up a lot more donor cars.. wait a minute.. Why would they be different? I am assuming that they are the same from just thinking about it, since both are ford.. and both m90's on the ford.
Also, since it hasnt been really mentioned much, I know the GSL-SE's injectors are larger, and therefore in theory would be able to handle more hp, and consequently more boost.
I already have my 5/6th ports wired wide open, and have a RB race header, 2.5" straightpiping.. so technically there are few restrictions there. I would also look into an FMIC or TMIC just to make sure things are safer, cooler intake charge, and possibly gain a bit more hp. Also, I have my air conditioning pump removed, and there is enough space there I imagine. I assume that a 1.75 overdrive pulley would be great so that at 2300rpm the S/C is running at a favourable ~4000rpm, and at 7000rpm the S/C is at ~12,000rpm, and if you wish to push it a bit more.. 8000rpm would be the 14,000 S/C redline.
If I was to do this, I would also try to vent the hood slightly to keep things a bit cooler as well.

PS.. you guys have to remember to keep this thread uncluttered. I see a lot of bs crap, and it would be great if you tried to post everything at once so that it isnt so big.. I just read through all 17 pages tonite.
Daryl

3.8 mustangs did not come stock with a supercharger. Those are kits that have been adapted to the mustang from xr-7 or super coupe parts.

do NOT run an overdrive pulley just yet. Do you have any idea what kind of boost that is going to make? I think you should try and do some calculations first. I think the s5 n/a moves some 300 or so CFM@ redline? and the m90 moves 550(sucks 550 in...) or so cfm at its max. at 5lbs of boost.

I think you'll have more boost than you want if you run that supercharger to its redline.

hotty 04-22-04 12:30 AM

good point.. well taken.. as I know now as well that the GTP supercharger has the molded output .. however, I am sure this can be modified, and I personally would not worry about this. Nonameo, I assume that Zbrown has his S/C overdriven roughly by 1.5. I am assuming this from his post saying that the blower will not exceed 11,000rpm often.. just from a rough guess if this is at 7000 rpm... that gives a rough 1.5 overdrive.
This all can be set by varying the difference in size of the E-shaft pulley vs the S/C pulley, or in other words.. the size of the S/C pulley.

karism 04-22-04 06:37 AM

Well done Z brown!

People like you make the Rotary world a great engineering(SP?) place!

RETed 04-22-04 07:38 AM


Originally posted by karism
Well done Z brown!

People like you make the Rotary world a great engineering(SP?) place!

Huh?


-Ted

DEZERTE 04-22-04 08:44 AM


Originally posted by RETed
Huh?


-Ted

LOL

Anyways. Where can I have a custom made belt for the SC?

OverDriven 04-22-04 08:47 AM


Originally posted by RETed
Huh?


-Ted

Not everyone on here is an American, and not everyone speaks perfect english.

-Joe


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