Taking FC to 500+BHP

[maz13b]

I have written to pineapple racing shop and so far this is what I have got from them.

""The S5 motor can make 500hp, but you would be close to the limit of strength without doing a lot of work.
A special thick rear plate would help out and studding the motor is a good idea if you don\'t run the stronger
FD rotor housing.

If the motor is not strong enough you will keep breaking rear plates.""

This is going to be very interesting. I cant wait to see where its going and how much it would cost me.

Archbish: thats exactly what I am going to try and do... use none branded parts when I can and only buy something branded if I have to.

I dont understand why should someone pay £1k for V-mount intercooler from lets say HKS or Dragon performance when you get one for $500(thats the fact) delivered to UK.

Thanks
Maz13b

[antnicuk]

i dont see why anyone would spend $500 on an intercooler from USA when you can buy for £140 from UK that will do the job just fine

Bish,   you are correct, but on my FC i used a power FC from an FD.  I\'m using a Mtec on the kit car.

The back plate is a week point on the fc,  some late series 5 engines had the stronger ones but they are like hens teeth.  Prof broke his back plate with  much less than 500 bhp.  I strengthened by own plate by welding a support to it and it seemed to work ok.

[Prof]

The back plate is a week point on the fc, some late series 5 engines had the stronger ones but they are like hens teeth. Prof broke his back plate with much less than 500 bhp. I strengthened by own plate by welding a support to it and it seemed to work ok.

True indeed - because the FC engine mounts are on the centre section, the engine can experience torque twist when accelerating hard, and the force is exerted through the dowels to the rear iron and out through the bell housing / gearbox.  The twisting action can crack the dowel seat near the oil pedestal, and then you get a nice pretty oil leak !
 
Here\'s my thread of woe...
 
http://www.mazdarotaryclub.com/forums/showthread.php?t=40119&highlight=rear+iron
 
And an article on Rotary Resurection about this problem:
 
http://www.rotaryresurrection.com/2ndgen/tech_rear_iron_break.html

[maz13b]

antnicuk: I was talking about V-mount intercooler and upgraded radiator for $500 delivered

Anyhow good point mate.

So I would need to check whether the back plate is reinforced or still reinforce it? Would reinforcement eleminate the problems in the future or just prospond them?

thanks

Maz13b

[BlitzBoy]

I wonder how long it made 700bhp for? :Talking1 :Giggle

Read the story about the guy he is using a 13Bre motor from the cosmo in his FC which has massive intake ports anyway, the engine is also dowelled and pinned runs 35psi on race gas with a huge turbo, and its still running after doing various dyno pulls, he is going to the strip soon

[Archbish]

35 psi?  Holy ****!!  Anyone over here running more than half that???  (Intentionally anyway)

[BlitzBoy]

not on a FC, but Chris Impey they run around at 25psi in his FD, dont know what psi Dragon used to run at.
Im planning 22psi

[Brett]

Got a link for the FC with the COsmo lump?

[BlitzBoy]

There you go 769rwhp, I think all he did was port matched the primary ports same as the Turbo FC motor, secondaries untouched and used Turbo II housings I believe

http://www.rx7club.com/showthread.php?t=747542

[Brett]

I\'ll take two

[bnaellis]

antnicuk: I was talking about V-mount intercooler and upgraded radiator for $500 delivered

Anyhow good point mate.

So I would need to check whether the back plate is reinforced or still reinforce it? Would reinforcement eleminate the problems in the future or just prospond them?

thanks

Maz13b

Can you and Antnicuk elaborate a bit more on where you can get these intercoolers so cheap??

rgds
Brian

[Archbish]

I would guess they\'re from the Bay of E... *grin*

[Brett]

Ebay - its a blessing I tell you! :Giggle

[Prof]

There you go 769rwhp, I think all he did was port matched the primary ports same as the Turbo FC motor, secondaries untouched and used Turbo II housings I believe
 
http://www.rx7club.com/showthread.php?t=747542

 
Where the hell is his intercooler/cooler - the pipe goes off into the bulkhead !?

[maz13b]

Brian,

in the few weeks check out mazdanetwork.co.uk. Well be selling them there soon.

Regards

Maz13b