Does anyone have any info on the 1st gen janspeed turbo? Pictures and spec if possible as i can\'t seem to find anything. Thankyou.
The only thing I\'ve seen that mentioned them was an old advert in a book. No further info ... sorry
I don\'t have anything specifically for the 1st Gen, but I did have a Janspeed turbo conversion on my rally car (opel), which later donated parts for a comprehensive rework of the system. As fas as I know, the basic technology was used on a number of engines, including the Ford Pinto and others.
The opel version has a crude log style exhaust manifold, which has a screw in wastegate and Rotomaster turbo. I understood that Rotomaster later bacame Garrett, but I still like the idea of a Rotomaster turbo on a rotary! The Turbo had a T4 flange size and an A/R60 compressor housing.
The inlet manifold was a simple steel log fabrication linked directly to the compressor outlet - no intercooler. A cast aluminium adapter allowed a 2" SU carburettor to be fitted onto the front of the compressor. Crude, but it did not need to deal with a pressurised float chamber. The draw through system required special seals in the turbo to deal with the very low compressor pressures when the throttle was closed - something that modern turbo\'s don\'t encounter.
A micro dynamics ignition retard device retarded the ignition on command from a simple pressure switch.
That was pretty much it - lag, poor fuel control and distribution, poor ignition control and hot inlet gas. Times have moved on.......
Keith
sounds very much like an elford turbo kit ... is this a conincidence of did Janspeed make the kits that Vic Elford had fitted to cars and sold under the Elford badge ?
According to Brian Long\'s RX-7 book,
Mazda Dealers Bob and Mike Redrup, trading as Bruce Garages had a Janspeed designed installation:
RotoMaster Turbocharger
Intercooler
Twin Choke Weber
Free Flow exhaust
Micro-Dynamics blackbox
It gave 7psi boost and power was about 200bhp
0-60 6.2secs
Top speed 145mph
Cost about £3000 more than an Elford Turbo.
Ray
they were blow thru as opposed to suck thru carbs didn\'t Des (one of the many presidents of rx7club have one for a while) don\'t know if you met him or remember him.
think they only made a couple as they had problems with manifolds cracking.
Thanks for the reply\'s. Does anyone know if there were any changes to the bodywork or were they close to stock looking.
Hi, I know this thread is old but seeing as I have recently obtained one of these beauty\'s I would tell you a little from what I have seen.
Body isnt standard, it has a different rear wing, number plate sits under the rear bumper, there is a plastic \'turbo\' plate in place of the number plate. They have 13 inch alloy wheels, different sideskirts and front bumper.
My car needs setting up, it has a low compression engine so doesnt make the original 200bhp (well not until boost is raised anyway). Its nothing like a NA 1st gen, power peaks at around 5000-6000rpm max and there is little point revving it further.
They even have a remote wastegate, and a cool Janspeed boost gauge.
Ill post some pictures when i get them. I cant wait to see how it is with the boost and carb set up right.
RX motors have a fairly rough looking one listed on their cars for sale page, with pictures -
http://www.rxmotors.co.uk/fb.php
I think you will find that is is not as rough as it looks!!
Indeed, the pictures Matt took were with his mobile phone and look terrible. Here are some better pictures of it.
http://www.mazdarotaryclub.com/forums/showthread.php?t=29176
Quote from: lanciachrisRX motors have a fairly rough looking one listed on their cars for sale page, with pictures -
http://www.rxmotors.co.uk/fb.php
HAHA, dont worry i\'m sure some mug will buy it :Laugh :Laugh
Whats the progress with the car??
Quote from: DRAGONHAHA, dont worry i\'m sure some mug will buy it :Laugh :Laugh
hehehe :D Ross I was thinking of painting it pink, as thats such a manly colour... ...oh sorry you have already done that :D
Quote from: alban1973Whats the progress with the car??
Well it went straight through the MOT but has a problem with the fuel pump (which is not pumping :D) and the wheels are really corroded inside and need beed blasting so one of the tyres keeps going flat. I may try and drive it to Trax but it depends if I can get it running today.
Cheers, Ant.
My apologies - the photos on the RX motors site are a little misleading :P
LoL, had me chuckling reading that.
Ant, is it a standard fuel pump ? they aren\'t that great apparently. and I suspect it\'s having to work hard with a turbo upping the pressure
we took the pump off, and it had a bosch number on it! got one same day for £65 and she\'s back on the road. Im well chuffed :)
hi do you still own htis car??? jut wondering how it was going?
cheers, michael.
Nothing news? :)