Author Topic: Which Mods to do and in which order?  (Read 2712 times)

Offline Dax

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Which Mods to do and in which order?
« on: March 21, 2016, 10:30:50 PM »
I was wanting to know what you guys considered as must do mods to a standard FD RX7, your reasons for them and in which order to do them?
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Offline C J R

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Re: Which Mods to do and in which order?
« Reply #1 on: March 22, 2016, 12:52:32 PM »
Depends on what you want to do/use the FD for and whether routine maintenance creates the opportunity for mods.

My experience was;
Purchased a reasonably good FD (1993) with rebuilt engine,
OE bushings required attention, so swapped all bushes for Poly.
Next Suspension was OE and tired, so swapped suspension.
Brake Discs and pads were OE and tired, so swapped for Tarox discs and Ferrodo pads,
This continued over a few years (usually a winter rebuild) and now I have changed the above parts (including engine/turbo etc etc) for more uprated parts....and this winter changed even more parts.

The trick is selecting the right upgrade parts.  ;)

or if your FD does not need parts changing, just enjoy driving it  ;D

Chris

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Re: Which Mods to do and in which order?
« Reply #2 on: March 22, 2016, 01:53:22 PM »
And Chris is very modest...his car is a beast!
If yours is bone stock and been off the road awhile need to confirm all healthy b4 you starting modding.
On an fd you cant just bolt on exhaust induction and uprated intercooler like you can on other turbod cars. The map will have be adjusted to suit the better breathing in an out.
Thatsvwhere an Apexi fc ecu comes in...its twice the operating speed of factory ecu and then with all bolts on can be safely mapped.
92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

Offline Dax

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Re: Which Mods to do and in which order?
« Reply #3 on: March 22, 2016, 02:44:40 PM »
Cheers Guys well Mods wise I only have a Greddy induction kit and HKS Hi power exhaust system so pretty much stock.

So is the next step an Apexi FC? is it worth looking for second hand or should I wait and get a new one? 

Also what does a stock FD run boost wise and what is a safe amount of boost to run on stock? or is it not recommended to use a manual boost controller and get any gains that way?

I have read about people dropping the sequential for a non sequential setup what is the upside and downside of both setups?

Cheers Dax

   
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Offline Dax

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Re: Which Mods to do and in which order?
« Reply #4 on: March 22, 2016, 06:34:38 PM »
Just been reading about Chris's motor and your right about it being a beast!
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Re: Which Mods to do and in which order?
« Reply #5 on: March 22, 2016, 06:47:16 PM »
Apexi fc defo if gonna do anything else....and do not put an mbc on. It will need mapping for any future mods.
Cant remember standard boost pattern. 10. 8 . 10 psi i think as the turbos transition.
Ive had non seq on my last set up and had lots of trouble controlling boost despite getting an apexi an mapped.
What do you want to do with it...if your heading to track need to look at the rad and ic as these fd generate heat.
I would say.
Downpipe.
Apexi.
Rad and ic
No boost til its mapped and youll  be 300 plus.
If you go single turbo...then far bit of fabrication downpipe n manifold. Bigger injectors after and fuel pump . defo rad and ic upgrade and remap.
Its important to remember that if you change something that gonna affect the air fuel ratio the map will need to adjusted to put more fuel in. Take a 200 sx...you can put an adjustable wastegate on wind it in til youve got13psi and instant 250bhp...50 increase...the car will adjust fueling via the o2 and maf sensor as there is that capability on the fd there is not a maf and there is not the capability without mapping to adjust the fuel.
Piston engines can take alot more knock/detontation/ pinking than a rotary.
Modern cars will detect knock and detune the engine to a safe limit.
92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

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Re: Which Mods to do and in which order?
« Reply #6 on: March 22, 2016, 06:51:15 PM »
You got a boost gauge...if not defo get 1 see whats going on.
92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

Offline Dax

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Re: Which Mods to do and in which order?
« Reply #7 on: March 22, 2016, 06:57:33 PM »
Well I might do a track day once or twice a year if lucky but really I just want a quick road car for the mo to go to meets and shows, having 4 little people means spare time for the track is a luxury at the min lol. But not impossible ha ha
I would like to keep the twins too for the minute so with the ic, rad, and Apexi I am looking at 300+bhp? is that with the base map or once it's got a proper map on?
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Offline Dax

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Re: Which Mods to do and in which order?
« Reply #8 on: March 22, 2016, 06:59:28 PM »
Yeah got one, but it's not in yet can't decide where to mount the bugger lol but will get it banged in asap lol
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Re: Which Mods to do and in which order?
« Reply #9 on: March 22, 2016, 07:03:43 PM »
With it mapped mate. Mapping is about £350 . Second hand apexis are about £400.
92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

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Re: Which Mods to do and in which order?
« Reply #10 on: March 22, 2016, 07:07:20 PM »
What downpipe is onit? Hopefully stock if on standard ecu? Might have been chipped in Japan? Sometime theres stickers on the ecu....
92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

Offline neil_jdmr

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Re: Which Mods to do and in which order?
« Reply #11 on: March 22, 2016, 07:36:11 PM »
Mate with the mods you already have get a 3" decat pipe,  a thicker intercooler and a power fc then go to a tuner and get mapped to about 0.9 bar.  That will take you over 300bhp easily and give you a very capable Street car. Do not go non seq as it's just an easy way of robbing you of low down power,  the twin pack is not the best power producer but does do a good job in sequential due to their small size. The non seq just acts like a single turbo but without the simplicity and power advantages.

If you want to go further you can push on with seq like I have our take the plunge and just buy a single.  The single will be more powerful in 99% of applications but I can happily say I've sat up the arse of many in my stock twin just down to low end power delivery tbh.

Aside from that it's test the car and replace where things are tired. I've stuck with oem rubber bushes and oem 17" wheels and happy with them tbh. I have replaced the suspension and brakes and tbh many other things for track use.
« Last Edit: March 22, 2016, 07:42:04 PM by neil_jdmr »
Standard sequential, standard engine, Oem body, 1.2bar, WI

Twins retired. KKK K27 1.25bar courtesy of Jason and Stu

Offline Dax

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Re: Which Mods to do and in which order?
« Reply #12 on: March 22, 2016, 08:56:22 PM »
Cool well I will have to keep my eye open now for a 2nd hand Apexi.
So when it comes to IC there are some cheapish ones new on eBay are they not worth bothering with? Is it better to go for a branded one?
As for replacement down pipe again what bore etc and should I go branded again?
Sorry if the questions are stupid?
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Offline neil_jdmr

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Re: Which Mods to do and in which order?
« Reply #13 on: March 22, 2016, 09:55:16 PM »
As long as it's a 3" rhd downpipe it won't really make much difference,  for the ic I would deffo go a good second hand branded one. The xs power and the greddy copies are piss poor
Standard sequential, standard engine, Oem body, 1.2bar, WI

Twins retired. KKK K27 1.25bar courtesy of Jason and Stu

Offline Dax

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Re: Which Mods to do and in which order?
« Reply #14 on: March 22, 2016, 11:08:57 PM »
Cheers I will keep my eyes open over the next weeks and months hopefully I can source what I need.
As for the Apexi do you know anywhere in the northeast of England or surrounding area that you would trust to map it?
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