I just got a 76 j spec 13b core low miles... I am thinking about doing the following mods... any one out there dyno a similer motor??? 91 convertable high compression rotors, 3mm seals, lightend rotors, motor balenced, turbo stationary gears, with bridged ported 4 port side housings, and exaughst porting... I will run a RB header, custom duel 2 1/2 in pipes to a rb muffler, RB intake for holly carb match ported to side housings, I dont know what size carb 650? it might need more... set of coils, 12a front cover, electronic ignition, light wieght RB flywheel and counter wieght, a street/ strip rb clutch, I have about 1/2 the parts I need... GOD IT SUCKS TO BE POOR!!! I will also strap on a 125 shot of good old n20 jetted for a v8... any one ever dynoed a simler setup???

 

I have used a set up similar to yours, 405rwhp 1988 turbo II bridge ported plates, 1988 N/A rotor's 9.4 to 1 compression, Racing Beat 4 port intake manifold (made to fit the Turbo II side plates) 650 cfm carb. 165 nitrous oxide shot. I use the fogger set up.

 

Judge Ito, did you run the 13b bp N20 combo over the qtr.... how did it go? Steel seals I assume.

 

The car I have this bridgeport N20 set up on is a Mazda Rx3 Drag car, Best ET so far is 9.41@139mph. Yesterday we were test and tuning the car for this big NHRA import drag race this weekend coming up. When the Rx3 was in one of it's better time shots, the clutch centre HUB let go from the rivets, the car went into neutral and aborded the time hot. next time ill be tunning for a 9.2 or better.

 

forgot to add to your question. Hurley engineering apex seals. 2mm dual springs. I really like them for the bridgeport engines and the Atkins Rotary apex seals..2mm do we need anything else????

 

gosh... got a decent bellhousing or scattershield I trust.

what are the specs on the exhaust, ie: primaries diameter, length, main pipe (if at all...) if you dont mind me asking... (welcome to pm me if you want to keep it quiet, well, the specs at least...).

Any all-motor times, and what kind of rubber.

Gosh I'm a nosey b@$+@r& aren't I....

 

Do any of you N/A BP guys know if the 6th ports are even useful on a secondary bridgeport? Or would it be best to use a 4 port plate (turbo rotor housings for exhaust porting of course)
And Ito: any opinion about carbon seals? Also what is your redline?

 

I've been contemplating a similar setup for street use, without the NOS, and a controlled by a halltech. However still have some problems with my ideas:

1-No $$$
2-Probably not streetable

But someday I'll tell you!

 

node just start with a pre-'86 engine...

 

uhm, GSL-SE's still had them. I thought it was non-RX-7 13Bs that didn't
And that didn't answer much of my question

 

Redline is 10,200 rpm, I have found the turbo II plates to work very well for the N/A BP engines, larger port runners, larger capacity oil pump. You could port your 86 to 91 N/A rotor housings. As far as Carbon aluminium apex seals I don't really like them, back when we had no choice, I would say go with that apex seal for N/A engines, but know we have a better choice. They are called Atkins Rotary and Hurley Engineering apex seals, I only recommend this seals for N/A engines. For turbo charged engines factory mazda 2mm apex seals really meets the demand.

 

wow 9.2 is fasttttt!!!!! I could probably only afford to go mid to low 11's at the most.

 

have a look at Judge Ito's chassis... (I found some pics on the web)... now I know he does it. Is it fair to say that there isn't much hiroshima sheet metal left in that car Mr Judge?

Tymmerx7, low 11's is nothing to be sneezed at from a full bodied street car, regardless of whether it is all-motor, bottled or turboed.

 

Buzz I'm not quit sure what your point is. I never said it was full metal or a street car. I posted it was a drag car. Usually that means back half or full chassis. The Rx3 that we are currently running is my brothers Rx3. The pics you saw on the web, is my New proyect. 1977 Rx3 SP full chassis Chrome Moly, Cosmo Jspec bridgeport engine, FI, alcohol N2o, G-Force clutchless tranny, My Rx3 is not finished yet. I could tell you that, to really make my Rx3 run in the 8's with the N/A N20 set up I need to be extremely light. My Rx3 is 300lbs lighter then my brothers Rx3. here in the states many people have tried to run really fast with the N/A N20 set up, but only 2 out of many have touched the 8 second zone. 1 was a 2nd gen.(Partytime) P-port N20 haltech 8.95@144mph and another 2nd gen.(Pimar) out of Florida just the other day ran 8.9 @140mph. Ill be working reall hard to enter the 8 second N/A N20 club.....

 

Holy ****, I thought he had converted to turbo already. Thats a perfect car in every way My fav

 

So whats that telling you! Ditch the classic and grab everyones favorite, an FC!

 

What for? Even more weight to lose...

 

so its still an FC

 

Node, both of the 2nd gen.'s that ran the 8's on the N/A N20 set up were full carbon fiber cars.. my Rx3 stil uses original metal. Fb,Fc,FD's are super nice cars, but Rx3's don't fall to far behind

 

Sorry Judge, I wasn't trying to bag you / your statements / your car or anything, when I saw the pics of your car I was hell stoked (huge grins all 'round!) - that is a very seriously well built and damn impressive car. I suppose if anything I was trying to make the point that Tymme shouldn't be discouraged with "just 11's" that others are getting hell quick times - the "others" have extreme high performance vehicles.

The quickest rx3 I've hard of is the Pac Performance rx3 sedan, 8.0 something @ 174mph - 20bt. Retains original style nose cone and is a back halved car. I shudder to think how they would go with a chassis as good as yours!

 

No problem buzz, thanks for correcting that for me. when my car get's up and running Ill keep everybody posted and updated on my progress...

 

Oh come on. FC's are annoyingly common. RX-3s are rare, they're lots lighter, and they look about 5,000 times cooler

 

I say Rx3's are

 

Especially with a big bottle out back.

 

Hmm did you say nitrous???????