What to do to get to 400 BHP?

[Gary C]

right i have a standered rx-7 all that has been dont is an exhaust, what things need to be done to get it up to aroung the 400 bhp? I think 400 is a nice power to have on the road dont want to go to mad at the moment but was just woundering how much would be involved?

cheers gary

[james01uk]

ok

well for one are you talking about a wheel figure or flywheel figure.
eveyone will have different opions on what you should do.
as it does depend on what maintance costs you can afford

I would say the importants things are:
Apexi ECU or similiar and commander
Exhaust
Intercooler upgrade
Upgraded Clutch is a must /flywheel would be a good idea
Injector Upgrade
Boost Controller
Spark Plugs and leads 10\'/11\' and magnecor leads
Fuel Pump
Turbo Timer just for looking after turbo\'s
Water injection is a good idea IMO
Please bear in mind the stock turbo\'s don\'t like running much more than 0.9-1.0bar therefore going to a single tub is a good idea but not necessary.


That should see you getting close to your required figure (Basically pretty much what I have)

[Gary C]

I would like it at the wheels but thing ill have to settle for it at the fly atm, that would still be around 350 at the wheels tho wouldnt it?
 
i have a turbo timer already and an exhaust bit i only got from ther cat to the end, im still running a standered cat would i have to change this?
 
i dont really want to change the turbos atm but i will in time, what sort of figure do you think i would be looking at? i would to the work myself (well what i can) i know i would need a map ect...
 
cheers

[james01uk]

ok I would suggest you buy an Apexi ecu as you first mod. as it will be needed when you add any other upgrades to your car. Please make sure this is tuned by a pro as rotary\'s can be very easy to make mistakes with if you don\'t know what you are doing.

then once you have that sorted remove the cat and get a down pipe
then a boost controller is always a good idea.
then intercooler otherwise your inlet temps will be high
then some 850 injectors (THINK PRIMARIES ARE 550 SO REPLACE THEM) as they are cheap Also Spark plugs will need to be changed and magnecor leads wil help an awful lot.
obviously clutch will need to be done when you up the boost

[james01uk]

I run a similar set up and have seen 300@wheels
but now have a more free flowing exhaust and a large street port and ligh flywheel so am hoping for a little more

it will be enough for you till you go single turbo

[pete sparrow]

If you want 400 rear wheel power you\'ve got to go single and get rid of the twins.
T04 or T78,just naming two for example.Those turbo\'s linked with all of the above mention bits will give you that easily at fairly low boost.
Get rid of the cat as well n go straight through.. Might want to concider street porting or even a half bridge done.. All extra cost,but the engine will respond soooooooo much better.
Get your cheque book ready for a complete beating!!:evillaugh

[interloper393]

another option is the mods above and a small 25-50bhp nos shot, if its setup correctely then it will be safe to use save u going to street porting n single tub at the mo, a 2nd hand wizard of nos kit will be about £200 bud

[Bulla]

GT35R with all the other goodies.

[m4drx]

buy an aston

[Warthog]

How many beer tokens do you have to spend........:wave

[antnicuk]

How many beer tokens do you have to spend........:wave

^^^^^^^^^^^  that my friend is the million dollar question ^^^^^^^^^

you need to decide what you want to spend before you do anything

[Gary C]

Well not sure how much i want to spend really im goiong to do it oer a few monts anyway, think im going to get ecu and then go from there.
 
Waat is a half bridge? i was told befor not to go the d-cat rute but to go high flow or sports cat, not sure why just told tht was the best way??

[Nuk Su Kow]

Wasn\'t by someone in the MOT business was it? or someone who goes on tracks quite a lot?
All much of a muchness....go straight through, no probs there...
 
A half bridge is a type of porting....however the bridge/half bridge port is something you wanna do if you\'re going to go crazy end of the spectrum....I know someone with a full bridge port.....and a huge fuel bill....:chat
 
Like people have said here it depends on how deep your pockets are, how much you use your car and what your ultimate goal is instead of chasing figures.
It\'s good to have an idea of how far you want to go but 400 is one of those middle fig marks...
 
I know because this is exactly what I had in mind when I started....I had everything to run 400 atw on twins (because I didn\'t want any lag) then I realised how many boosting problems you can get with twins at that power....think I lasted 4 days before I said, "That\'s it, get me a T78"......
 
Doing it over a few months will drive you nuts and cost you mapping money in the long run....
 
Get an Apexi and a straight through...
maybe an FMIC too....
Then try to do the rest in one go....otherwise the money you think you\'ll save will go on the re-maps...
 
Hope this helps...

[Mims]

buy an aston

hahaahahaa

[james01uk]

agreed with all the guys above.

no need for a CAT just make sure you use the right MOT places that know how to adjust your apexi ;-)