Firstgen_Driver

I've been lookin into buying the rb road race header for a while...and was actually thinkin about doing the same thing...so a lil help from someone would be helpfull...keep us updated

Firstgen_Driver

I've been lookin into buying the rb road race header for a while...and was actually thinkin about doing the same thing...so a lil help from someone would be helpfull...keep us updated

wankel=awesome

Ok everyone, the MSD/DLDFIS mod is installed, but i havent started it yet. I got called in to work at the last minute.


Ok, as far as the exhaust is concerned, i dont have exact diminsions yet, but hers how it goes:

RB Dual road race header+Dual connecting pipe (muffler shop piece) 2.25 inch dual straight tubing with 2 Thrush glass pack mufflers staggered on each pipe (about the same area as the presilencers on the RB dual system) connected to a few more feet of dual piping, which is then bent close together over the rear-end and exits true dual tailpipes...with your choice of the availability of exhuast tips (preferably stainless) that your muffler shop has.


I have used glasspacks before, and they sound amazing on both high rpm engines and low revvers.....they are a perfect muffler...and dont forget their unique shape and size...it allows mounting the muffler nearly anywhere!


When i build mine i will take pictures and post a price estimate.




BTW...Dldfis and the msd box have proven to be expensive.

MSD 6al=224.39

Blaster 3 coil X3=150.00(approx)

Custom wire kit=80.00((approx) MSD 8.5 superconducter 8 cyl)

wiring goodies and wire=50.00 approx.

I hope this mod is as good as i have been told.....

glewsRx

iTrader: (1)

Those glasspacks are going to last about as long as a fart in a hot skillet.

gsl-se addict

iTrader: (3)

Also, your low/mid-range is going to take a big hit by not collecting the exhaust. Try collecting at the muffler like the RB Streetport setup.

wankel=awesome

As for the glasspack not lasting idear....WTF? I have actually used them on several applications before and never had a problem with them "not lasting" .


However, I do understand that the rotary burns hot, and is why im testing it.....To see if you are correct, glews.

Besides, they cost about 60 bucks a piece...if they fail, they fail....next muffler type.......Progressive tesing.....

Joker1337

Just FYI:

https://www.rx7club.com/1st-generation-specific-1979-1985-18/rotary-vs-piston-exhaust-temp-683748/

glewsRx

iTrader: (1)

yes but its regressive testing to retest something that has been proven time and time again. Glass packs don't last under rotary heat.

you've used them on several applications before... on poontangs?

and after you waste $120? Then what? Are you gonna spend another $120 on thin walled exhaust piping?

Do yourself a favor and listen to the people on the forum. Us first genners are so cheap that we've tried everything. So if you want to come in and try to reinvent the wheel, and tell us you gonna start by making it sqaure (it works for tables), and if that doesn't work maybe going to a pentagon (it works for military buildings), we're gonna tell you good luck with that, but it won't work and its a waste of time and effort.

Sooooo,
gl with the glass packs and thin walled exhaust tubing.

djessence

+1 on both. Cheap ***** mufflers dont last AT ALL. thats why they are cheap. and *****.

wankel=awesome

As for all of that ****....


This is the first one of these cars i have owned. I am new to the forums. I have spoken with racing beat salespeople about there exhuast system, I know rotarys are hotter, I never intended to use thin walled exhaust pipe.....

Also, although these forums can be helpful, theyre often full of tyranical ******** whose information often clashes with that of experts! Lets take DLDFIS for example....It is suggested to help with the driveability and reliability by Jeff20b, but I have seen people comment on it actually making the car more powerful. What about the guys who say it doesnt work at all?

All im saying is that the world (and these forums) are full of people that are so full of **** they stink, which is why; If i have the resource and THE WANT TO HELP OTHER FIRST GEN OWNERS, I might as well try it so I know myself.

No offense glews, but if i simply listened to everything everyone told me, id have a SB Chevy powered Fb.

Kentetsu

Who's the idiot saying that DLDFIS doesn't work?

As to everything else you've said, some things are "known truths". Using a glasspack on a rotary would fall into that category.

By the way, the experienced members do try to keep the BS to a low level, and will straighten out the folks giving bad info. So far, nobody in this thread has tried to feed you any BS.

If you are truly mule headed and stubborn, then go ahead and find out for yourself how long fiberglass packed mufflers will last on your rotary. Good luck with all that...

Glazedham42

iTrader: (4)

Just a tip, but instead of using the $60 glasspacks, you can get some 4" round Magnaflow mufflers. They would have a better chance of lasting longer, are the exact same dimensions as a Racing Beat presilencer, and are the same price as your glasspack. I think that I used Magnaflow part #10414. They go for about $50-60 on E-bay. They are stainless steel and I think they have a warranty too. They would at least have a good sporting chance of holding up to the rotary heat. Much more so than a budget glasspack. Heck they're the same price, so why not? Here's a link.

http://cgi.ebay.com/ebaymotors/MAGNA...spagenameZWD1V

gsl-se addict

iTrader: (3)

We know that you are new. We are not trying to be harsh or feed you BS. We are telling you real world experiences. I myself have owned my SE for 13yr now..there are people on here that have owned FBs since they were brand new. There is a lot of experience gained over the years with owning these cars. You are not the 1st to try glasspacks. You have to remember that 1st gen owners are cheap and are always looking for a cheaper way to do something. Glasspack will not last on a rotary. It is that simple. If you won't listen to us, see what Mazdatrix has to say:

http://www.mazdatrix.com/e1.htm

It is good to experiment and try new things, but if it is something that has already failed 100 times, don't expect your results to be better. Exhaust is one of those things where it pays to do it right the 1st time. Many parts that work fine w/ pistons, can't stand the rotary heat. Noise is also an issue with the rotary. Many aftermarket exhausts will just be too loud.

You will want to collect your exhaust. The further back it is collected, will shift your powerband to a higher RPM range. I suggest collecting at the muffler like the RB Streetport setup. If you do not collect, your low/mid range will suffer and your high end won't be really better than the collected setup.

I'm sorry that you think we are being hard on you..this is not the case. The people on here are sharing their experience so that you will not have to waste time/money by re-doing your exhaust in a few weeks from now. You need quality parts and a well thought out design when dealing with the rotary exhaust. Take some time and read up on the experiences of others so you know what combinations last, sound good, quiet enough, etc. From that, you can use the time/money that others have spent experimenting and use that to your advantage when building your setup.

Kent

Glazedham42

iTrader: (4)

Well said Kent. I almost shed a tear reading that.

rotornoob

iTrader: (2)

well firstly, welcome to the forums...and the darkside...

secondly, i have run glass packs, fart cans, aftermarket stock replacements, and a magnaflow muffler. of all of them the magnaflow held up the longest. now the cat on the other hand..... damn that rotary heat

also make sure to get the thick walled pipe both for noise and longetivity.

i myself run the 2gcdldfis setup and i love that ****. cheap ( about $20 ) at the junk yard for a second gen coil, a few sessions of searching on this site and boom...way more *****

i agree that collecting at the back will probably be more fun/beneficial for you since your trying to make it go faster instead of *** dragging like a grandma at a prune festival.

glewsRx

iTrader: (1)

You can put glasspacks on that.

rotornoob

iTrader: (2)

lol

gsl-se addict

iTrader: (3)

Let me understand your idea for exhaust..you want something like this?:

road race header --> dual glasspacks --> straight out the back (no rear muffler)

If that is the case, I can feel my ear drums starting to bleed already!

Seriously, that is going to be LOUD! You are going to need a rear muffler and it will take something like the RB Steetport muffler to get it quiet. You might be able to put a magnaflow or borla on the rear and be okay. Just depends how loud is too loud. I would follow Jaime's advice and use those magnaflow mufflers instead of the glasspacks as pre-silencers.

wankel=awesome

Im not set only on glasspacks because of anything other than their shape....[I]and[I]affordability. I knew there were other alternatives (as glazed ham suggests) but had no idea of cost or manufacturer so i did not post it. I was told by both atkins dan and 680 rwhp 12a that the dldfis was "like snakeoil", and that "any differences are purely in those peoples heads". I havent finished my set up so i dont any input yet, but fundamentally i figure it should work.

I did not mean to be defensive about the glasspack idea....it wasnt specifically "glasspacks" that was the importance of the idea...Its goal is to be a the right shape DIY exhuast set up.

I wasnt referring to anyone feeding me B.S. on this thread, but I am cautious of anything that i cant prove.

No, i actually have privately made provisions for collecting the rear pipes, and the rear muffler has been chosen:http://www.rivalperformance.com/dtc.php