Taking FC to 500+BHP

antnicuk · April 30, 2008, 08:45:42 PM

I would love an RE but i recently paid Â£72 for a complete 13bt engine with all ancilleries. You are looking at Â£800 plus for a 13bre. Thats why i\'m using 13bt. I reckon there is only about 50 hp difference. I\'m not looking to squeeze as much out of as possible so 450 fly should be fine

if you can afford 13bre then go for it.

K1HKS arse · April 30, 2008, 09:09:38 PM

Quote from: maz13b;495291I see. Well I aint selling anything yet and when I will do I will register as trade.
All I want is to get some knowledge on how to get the FC to 500+bhp

regards

Maz13b

U could just buy my complete 13bre cosmo engine package out of my fd and put it in your fc!!!!!!

antnicuk · April 30, 2008, 10:02:35 PM

Quote from: K1HKS arse;495429U could just buy my complete 13bre cosmo engine package out of my fd and put it in your fc!!!!!!

oi !! who asked you!:spank:spank you just keep your nose out and start running some 8s. I aint letting you pull that car apart until you have run it in anger, i dont care how big your are:Giggle:Giggle:Giggle

K1HKS arse · May 01, 2008, 09:53:19 AM

Quote from: antnicuk;495441oi !! who asked you!:spank:spank you just keep your nose out and start running some 8s. I aint letting you pull that car apart until you have run it in anger, i dont care how big your are:Giggle:Giggle:Giggle

Tony, would love to start running some 8\'s.

If i could find someone to chuck some money at it then i could im sure.

OR

I sell up and....

put a 350 small block with Wade supercharger/holley carbs in it and run 8\'s/9\'s with that :flamed and still drive it home.........

maz13b · June 02, 2008, 10:34:12 AM

The FC has landed in the UK and coming to the workshop tomorrow.
After careful considiration I have decided to stick with the FC components and engine and try and take it as much to the limit as possible.

Will post some pictures, parts information and prices as I get along with the project.

Regards
Maz

L18M · March 04, 2009, 02:35:50 AM

yes yes.. this is old (ish thread) but i jus found it and makes an interesting read!
some say fc housing is ok for around 500bhp, others say fd housing is better..

anyone or consensus on which housing is better?

Prof · March 04, 2009, 07:29:22 AM

It\'s not so much the housings as the inlet runners and porting that\'s on the block.

The RE engine has larger ports - which means more air can be pushed in

There are guys running over 500 on a 13BT block on RX7club - but you will have to strengthen the engine with dowels and look to do something about the crazy way the engine is mounted in the middle iron - it means the whole of the back of the engine can twist against the gearbox/drive shaft on a hard launch - could contribute to cracking of the rear iron.

The FD engine mounts on the back iron - so it\'s better. Not sure on the RE - but I suspect it\'s the same.

Waterways in the FD are better, as is oil flow, so they make running higher horsepower easier for cooling - but that alone is no good if you don\'t have good oil flow and cooling outside the engine. And a big ass radiator with plenty of air flow around it for keeping your coolant cool.

L18M · March 04, 2009, 01:21:34 PM

will an engine damper thingie help with the back iron?

colin5524 · March 04, 2009, 02:09:07 PM

some intresting reading about 13bt 13bre
http://www.ausrotary.com/viewtopic.php?f=16&t=82

antnicuk · March 04, 2009, 02:38:56 PM

Quote from: L18M;588836will an engine damper thingie help with the back iron?

no, its weakness on the design of the back plate around the top dowel, there isnt enough metal around it as Prof found out.

I strengthened mine and it wasnt a problem. There were some very late engines with more meat around the dowel but they are like rocking horse ......

L18M · March 04, 2009, 02:51:53 PM

thanks for the input everyone

some interesting reads

Prof · March 04, 2009, 02:57:35 PM

Quote from: antnicuk;588855no, its weakness on the design of the back plate around the top dowel, there isnt enough metal around it as Prof found out.

I strengthened mine and it wasnt a problem. There were some very late engines with more meat around the dowel but they are like rocking horse ......

As Tony said - the newer plates are quite rare. I posted a thread up on it http://www.mazdarotaryclub.com/forums/showthread.php?t=40119&referrerid=4966

Luckily rotechiks found one of those later rear irons with both modifcations on it - and it was fine after that.

L18M · March 04, 2009, 03:01:26 PM

bit worrying about the rear plate as you were running about 300bhp ish =/

Prof · March 04, 2009, 03:12:52 PM

It\'s not really so much about power - but the torque you subject it to - it was a few hard launches - and don\'t forget the cab is that bit heavier so the transmission has to work a little harder to shift that extra weight. I\'d got more solid diff and rear subframe mounts in as well, and the engine mounts are a solid nylon design - so there is very little give in all that - means the power is going to find the weakest spot (usually between tyre and road)

It\'s an easy problem to spot - oil weeping out when the engine is running from under the oil filter seat - but not from the seat itself - literraly comes from the top of the iron where that bolt goes through.

BlitzBoy · March 04, 2009, 04:19:16 PM

In case you wondering the Difference between the FD 13B REW and the Cosmo 13B RE engines, good info here http://www.nopistons.com/forums/To-Cosmo-13b-Rew-Fd-t14153.html,
as Prof said REW is better in terms of hardened stationary gears, better bearings for oil flow , bigger exhaust ports etc, but RE better in terms of bigger intake port size (more meat on the plates also)