FAO Tuttle

[andy mac]

Good luck with all the stuff Gaz... Remember, only report back here once you hit 400 bhp!!

[tuttle]

C'mon Gaz spill the beans,How your new toys doin'?
All the best m8 <-see oldies can be cool too

[andy mac]

Gazboy said:

The instruction manual that matey borrowed didn't have 'settings', so we couldn't program the damn thing. It also doesn'r run PSI or BAR. It runs GAIN -/+ vacum/boost WHATTHEISGAIN? Gain of what? It's running +095 GAIN, which we think is 0.95 bar, but not sure. We ran out of time to dyno it (appointment was 4pm, I dropped the car of at 8.30, I didn't get it back until 5.30! I have to run over to Buckingham tomorow and spend £15 on a manual, then go back to Aylesbury to get it sorted and dyno'd. The journey home was an utter nightmare. I pulled out of a T-junction and almost spun the damn thing (in the dry), then used 2nd for a mini roundabout, and the back still came unstuck at 3.5k rpm. Once in a straight line, there was nose to tail traffic until Wendover, then I followed a effing Focus at 45mph in a NSL to west Wycombe, which is where I noticed how disgusting the wind screen was. Then I had a clear run of 1/2 a mile, so from 30 in third (1900rpm), I put my foot down- nothing, whistle, WOOOOOOOOOOOOOSSSSSHHHHHHHH F-U-C-K M-E! I let off damn near instantly, the revs are at 5000rpm, and I'm doing 85mph already. If I had an uneducated guess at the output, I'd take a stab at 'around' 300bhp, with a shitload of midrange, and I mean absolute stacks of it. The car it reminded me most of was Joust's Noble when he first got it and took me for a ride in it. It comes off boost very violently, and sounds like something out of the Fast and the Furious, with a very loud (not to mention cringingly embarresing) PHATISSSSHHHHH. From a recurc DV! A very scared Gazboy. >> Edited by Gazboy on Thursday 28th October 22:30

Know what you mean. the increse in performance with an extra 50 bhp is unreal. It feels like a whole other motor, and to be honest, it felt great! Just be careful in the wet.. When the boost comes on strong, it can get leary! The good thing about the tubby is that when you see the dyno graph, when the boost comes in it just stays at say 300, until 6.5... Just so much power on tap. Try going from 80-120 in 5th. See what the difference is. I had a mate who had a modded 200sx, and he couldn't believe the pulling power just in 5th

[andy mac]

The torque, and hp on the tubbies stay pretty much the same for some reason. Sounds like it has overboost with the 280 ft/lbs.

[andy mac]

Quite a good remap then.

[tuttle]

Sorry chap been away & missed all the fun!
To convert kpa to psi:

100kPa=1.01972kg/cm2(squared)=14.5psi

your unit should be able to change units with the mode knob!Do you have a decentish boost gauge?<-highly reccomended.
Sounds like you've got it under control now.Running 95% gain sounds scary.As I understand it your cars standard boost(prolly0.6bar or similar)would be 0%gain-therefore 100% gain is 100% greater value of that!-with the R33 30% gain is my hi boost setting & gives me 1.0bar<-sensible figure for every day driving!I havent read all of your above manual bits-these Jap manuals are'nt very helpful are they?-Greddy one is similarly obscure
Best luck tomorrow

[tuttle]

Again only read thru quickly.
SET GAIN function,i likened this to lag control really,its how fast your spooling up to desired boost level is.Normally you want this as quick as poss,downside is-too fast can cause spiking(this is where a good boost gauge pays off).
This is how I did it,with the Greddy kit.Set gain at a low figure-if pressure spikes during accel/pedal down,the up it by 5% continue doing this until you get a nice smooth pressure rise-you'll 'feel it' when its right.

[tuttle]

Gazboy said:

Right, had it fettled by G-force, and reccomended no more than 1 bar, with a 1.2 bar over boost. It pulls 258bhp at 5700rpm (278bhp with overboost), and 280ftlb torque at 4100 rpm (dunno what the overboost was on that).

Agree with those Bar figs,tho with your steel gasket-will prolly go A LITTLE BIThigher
Good bhp figs-you must be like a dog with two diXX!

[tuttle]

BIG grins allround

[andy mac]

Gaz... You need to get some incar footage around some nice little roads and plonk it on pistonheads.tv. I miss my car . Need to see yours in action to keep the feelings of mr2 related suicide at bay!

[tuttle]

Gazboy,1 or 2 forum links which may(or not)be of use,Top one is Blitz DSBC & explains setup procedures(some is in your above thread),2nd deals with actual boost settings,others are of a more generic nature.

www.geocities.com/MotorCity/Speedway/9589/dsbc_manual.html

http://forums.nasioc.com/forums/showthread.php?t=63380


www.lancerregister.com/showthread.php?threadid=35770

http://forums.clubsi.com/showflat.php?Cat=&Board=UBB12&Number=3458713&page=16&view=expanded&sb=6&o=&fpart=1

www.3si.org/forum/showthread.php?p=1976441#post1976441

>> Edited by tuttle on Sunday 31st October 12:18

[andy mac]

Tubbies.. A marvel of science! Gaz... See how I could do well with that 355?? Doesn't take much to make them friggin quick!

[andy mac]

Don't need to be funny, BUT...

... WE NEED FOOTAGE!! ENGINE NOISE!!! IN CAR FOOTAGE!!!!! HOONAGE!!!!

[andy mac]

:

>> Edited by andy mac on Wednesday 3rd November 15:10

[tuttle]

Gazboy very glad you had a good day @ Brunters,sounds like'Mister Two'did you proud.Can't wait to see some footage.Next upgrade?....BIGGER injectors?,cams+balancing?-don't get hooked

[andy mac]

If you are going to try for big power, then maybe the unichip is not best. Ask on www.imoc.co.uk and see what they say about unichips. OK for smaller power gains, but not good for larger modifications.

[andy mac]

oooh..Ok! Sounded like you were gonna go nuts!

[andy mac]

Nooo.. moving to the states in january, so not bothering. Selling the astra shitbox and driving around in shitbox accord!

That torque level doesn't seem that good. I would of thought that 400+HP would mean more than 338 ft/lbs? I might be wrong, but I'm sure you could egt a stronger torque level than that?? IIRC I think I remember one chap who had 230 bhp, but 280 ft/lb's of delicious torque, from rev 2 tubby. Will recommend an nice downpipe though! Aussie, or HKS, blitz or something.They are supposed to release lots of power from the engine, and I'd also reccomend a nice intercooler, ot chargecooler from celica, and Water injection. You can have 50/50 water/methanol mix to improve octane as well. Then some nice forged pistons, and a nice ball bearing turbo to improve spool up I think with the hybrid turbo's you can run slightly less boost without losing hp, but you'd have to check on that. Fuel pump, injectors, the list could go on, and I could spend lots!
Personally... anything more than 350 in an MR2 and it gets a bit daft. Fine for the drag strip, but not very usable for everyday. You could easily get a nice reliable car with a well thought out setup, with some quality parts, not cheap 'orrid tat from ebay!

>> Edited by andy mac on Thursday 4th November 01:22

>> Edited by andy mac on Thursday 4th November 01:50

[tuttle]

Agreed really big power would'nt 'suit' the mr2 particularly well.A good suspension/stiffening upgrade is ALWAYS money well spent IMO-allows you to use all that new power with control & confidence.AS you've suggested;get the charge temps & fuel delivery up to the task before going for internal engine mods.
Is the uni chip user programmable?for tinkering/tweaking a programmable ECU is very desireable,Motad are amongst the best but big £££'s.
Gazboy,you got any dyno sheets to post up yet?

>> Edited by tuttle on Thursday 4th November 09:29

[andy mac]

If he just wants 325 or so the unichip will be fine. You can run WI, etc, from it, and it is fully mappable to your setup. It is just a bit limited if you want really daft power! here I am.. spending all of Gaz's money on his car! I'm going to the states, and they have the cruddy MR2 over there. 200 bhp stock.. is that all... Wonder if its easy to get the 3S-GTE over there??