Rev4 Turbo *mini photoshoot*

[jimGTS]

thanks guys.

hopefully i can make a few more events this year again.

Silverstone for a mr2 only session in march! woo!

[2mad]

Curios how you'd get on at the pod .. best of luck Jim

[jimGTS]

ive finally put my hand in my pocket regarding this clutch decision.

have this bad boy on route from Japan! and a few bits also from the US to near finish off the wire tuck and help protect against the abuse i may give the car on the strip this year.

OS Giken R2CD, essentially one of the most badass clutch kits for the MR2



CRW stage 2 axle cage upgrade



TCS motorsports coolant neck



TCS motorsports coolant bypass hose
(this will ditch 2 large coolant hoses and a large hardpipe from the bay)

[2mad]

That is one mega clutch kit jim .. cant wait to see what times you trap now

[jimGTS]

ive been looking high and low for a while for what to get.
alot of what is available is only single plate, and/or doesnt come with a flywheel. and you hear of things needing tweaking, or not road friendly. and most are only suited to street and not for any drag use.
plus once you add in a good flywheel, the cost increases.

i just though sod it. its obviously OTT for my power, but i want reliable launches and a reliable clutch to take the abuse, so, unfortunately these things cost money.
plus future proofs the car up to 1000hp, ha.

ive cranked the 20b up to 1.3bar, and it feels nice, im probably on a fine line now, lol.

im still pretty lean up til 4k rpm with this blitz ecu, uncomfortably.
so i may need to look into a powerFC or something for road use.

circuit or drag, your barely below 4k, so not an issue. i just need to be wary on the road.

[2mad]

If you have afpr crank it up a few psi to richen up your lean spot .. or get an afc .. thats what i did with a minez and it worked great .. obviously a pfc would be better but theres the cost of the unit and mapping sessions .. afc + wideband was the route i took and worked great ... interesting stuff buddy, looking forward to more updates

[jimGTS]

If you have afpr crank it up a few psi to richen up your lean spot .. or get an afc .. thats what i did with a minez and it worked great .. obviously a pfc would be better but theres the cost of the unit and mapping sessions .. afc + wideband was the route i took and worked great ... interesting stuff buddy, looking forward to more updates

itll just richen it up across the board, not just the lean area (the FPR route). so ill loose pickup and power.
its my only gripe with the gen3 ecu's.

yeh ive been down the pfc route on both my previous mr2s, is another potential big cost and time (especially if you have issues with the map, ie cold starts, idle, warm starts etc).
its why i like the stock/blitz/mines ecu's.

but the AFC could be a shout.
issue is, ive not heard of anyone using it on a gen3 engine.

[2mad]

If you have afpr crank it up a few psi to richen up your lean spot .. or get an afc .. thats what i did with a minez and it worked great .. obviously a pfc would be better but theres the cost of the unit and mapping sessions .. afc + wideband was the route i took and worked great ... interesting stuff buddy, looking forward to more updates

itll just richen it up across the board, not just the lean area (the FPR route). so ill loose pickup and power.
its my only gripe with the gen3 ecu's.

yeh ive been down the pfc route on both my previous mr2s, is another potential big cost and time (especially if you have issues with the map, ie cold starts, idle, warm starts etc).
its why i like the stock/blitz/mines ecu's.

but the AFC could be a shout.
issue is, ive not heard of anyone using it on a gen3 engine.

Yes the afpr will richen up across the board i was just looking at the health of you engine not ideal i know .. afc + wideband + afpr worked so sweet for me tuned by me .. if your up for the challenge id recommended it .

Obviously pfc is the ideal solution but i was always chuffed i tuned my car though

[C35Rob]

If you have afpr crank it up a few psi to richen up your lean spot .. or get an afc .. thats what i did with a minez and it worked great .. obviously a pfc would be better but theres the cost of the unit and mapping sessions .. afc + wideband was the route i took and worked great ... interesting stuff buddy, looking forward to more updates

itll just richen it up across the board, not just the lean area (the FPR route). so ill loose pickup and power.
its my only gripe with the gen3 ecu's.

yeh ive been down the pfc route on both my previous mr2s, is another potential big cost and time (especially if you have issues with the map, ie cold starts, idle, warm starts etc).
its why i like the stock/blitz/mines ecu's.

but the AFC could be a shout.
issue is, ive not heard of anyone using it on a gen3 engine.

serious clutch envy there mate... can I have first dibs on your current one when it's out?


Re: S-AFC/S-AFC2/AFC-neo , personally I think if you understand their limitations - i.e. you're not trying to use one to compensate for bigger injectors and just using it for minor fuel trims (and understand that adding fuel will also pull a little bit of ignition, and conversely pulling fuel will slightly advance ignition) then there's nothing that can touch them for the price (I paid £30 for mine used because the wiring plug had been chopped off, you can get them all day long for under £100 in good condition)

I've not used one on a 3Sgte, but I do have one on my Laurel - I had it set up on the rollers and it's adding a little bit of fuel (6%) low down and pulling a little bit out (4-5%) on boost since RB25's run pig rich and drag timing off when on boost.. you will get the nay sayers and internet 'experts' try to tell you your engine will implode if you use one but it's simply not true.

the cost - maybe £200 bought, fitted and set up on the rollers for a SAFC vs the cost of a power fc - £600-ish plus at least a £300 mapping session is the major advantage, assuming you're staying at a similar-ish spec that doesn't truly warrant a proper standalone.

[JAAASH]

Just to echo the other comments. Awesome clutch mate. I've got the OS Giken TS2B in mine and it's fantastic. You really won't be disappointed!

Also keen to see the coolant bypass hose fitted. I've been considering getting one for a while now.

[2mad]

Rob as always is bang on .. in my case i need to get 10.0:1 to 11.5:1 so i turned down my fuel pressure till on boost was a 11.5:1 and added fuel off boost and for spool with a afc .. this worked great .. then tuned for water/meth 50/50 mix .. 10.8:1 was the magic number .. i was so happy i did it myself its not difficult


Afc's are great for tweaking your tune dont be put off be scaremongering

[androo007]

Nice work, nice clutch!

My arsehole starts twitching when you say you're boosting at 1.3 Jim..... watch out mate its blowing a lot of hot air at that boost.... I've seen people blow forged blocks doing the same.

Time for a bigger turbo

[jimGTS]

Thanks for the info above guys, sorry not had a chance to respond properly.
Been thinking of other ideas and routes to take regarding this afr business and your input has helped and intrigued me.
But for sure the clutch should do me well and am super happy with it.

In other news, went on a Dyno day today organised by the guys on the OC.

Not overly impressed, or over disappointed with the results, was expecting more given my tweaks and how well it's been running compared to my Dyno 2 years ago.
But for a stock 20b, not too bad really.
Unfortunately the car was heat soaked before getting on the Dyno, but probably wouldn't have effected things too much really (just thinking of excuses!!).

Happy enough with my top end afr's, but as confirmed by my previous comments, it runs super lean midrange!
I think this is costing me torque, and I'm sure potential Hp higher up the Rev range as the ecu must be pulling timing because of it.

Car still feels great, but this is the danger of taking it to a Dyno!
You are never pleased! Ha.

304.1hp, 268lb
257hp at the wheels
1.1-1.2bar.

[C35Rob]

the power figure isn't bad really, but man, those AFR's

did the dyno operator hear anything in his det cans?

[jimGTS]

Dyno day, so operator not wearing det cans.
Aside from the spike, afr's and its curve of other gen3s looked the same, but generally 0.5-1 point richer.

Most were in the 13/14s till 4K rpm and took a dive just like mine.

Just the way the stock ecu is.

I don't generally use wot on the road till I'm past 4K rpm, so not a huge issue, but I've never liked the lean condition understandably in the low rev range.

[jimGTS]

some may or may not of known about the MR2OC track day at Silverstone, but the event took place on Sunday, and we all had a blast!
had the track to ourselves for 2 sessions, and 3 pit areas for over 20 mr2s!

a few offs, me included on the very first lap, ha! but nothing serious for anyone.

anyways, im still a novice on track, but slowly got quicker and quicker throughout the first session, and 2nd session, well, i dont think i was going to go any quicker without decent track pads (yellowstuff and my brake fluid wasnt cutting it), and im sure some tuition would have helped too. i had to brake quite early in alot of places due to the heat in the brakes which was impeding my entry and exit speeds.

still pretty pleased with how i did.

pics below, and 2 videos i took.
combination of a mk1, mk3, mk2 turbos and NAs and even a 3ltr V6 and x2 3.5ltr 2GR equipped mk2s!

session1
https://www.youtube.com/watch?v=qav4szBu4ms

session2
https://www.youtube.com/watch?v=7Jv05Ctj3ts

[2mad]

Dyno day, so operator not wearing det cans.

really

[2mad]

I got a apexi neo going cheep if you want to sort that lean spot jim

[jimGTS]

still clutch and cv upgrade to fit, but finally got the TCS coolant neck on and bypass hose installed along with removing and painting the whole coolant elbow itself and distributor too.
decided to paint the new neck too match with everything else.

also installed new allen bolts and new t bolt clamps on everything along with new gaskets/orings from toyota.

few issues along the way, because the new bypass hose is off another vehicle, ie its not designed for this job on the mr2, is the coolant neck fitting is too big. So i had to cut off some old hose and wrap the new hose over that, in effect doubling up the clamping area. becuase of this, its super tight trying to clamp the nipple hose.

also issues with the new neck nipple itself for the coolant pipe to the turbo; its quite short, so i had to buy some new 10mm ID coolant hose to comfortably fit over the turbo coolant pipe.
not to mention now the neck is it place, it is impossible to unclip and/or remove the oem pressure sensor, id have to unbolt the new tcs neck to get it off if i ever needed too.
none of this effects the running and it works and looks great, just could be some improvements imo.





all this was removed from the bay


could have used a clean up before pictures, but you get the idea

[2mad]

very beautiful .. i sound like a foreigner lol ... but yeah nice jim