Jeff's MSP GTR Build

[jeffmsp]

been driving the car for a while now. Clutch is broken in and the n/a bp05 is pretty much ready for boost. I spent alot of tuning redoing the ITBs over and over and ended up getting over 20VAC at idle with them once I spent a long time syncing everything. Once I got everything perfect, I pulled the manifold again and now I am having Silex weld me up a classy version of it.

I also picked up some mazda3 rims for the car a little while ago and finally got a chance to put em on the car.

the stock msp rims are gona get a set of track tires so I can swap em out whenever I go to the track this summer.

seemed like a better idea than wasting good track tires on DD.

the car starts on the first try everytime.

once you get the megasquirt setup nice it doesnt disappoint. I finished breaking in the clutch properly, and boost will come soon if I can get a bit more time to finish the 3" downpipe with the weird saab outlet.

you will know its me if you see me in traffic as I must have the loudest riciest MSP to date right now (1.8l n/a with 3" exhaust). Everywhere I go I am setting off car alarms lol needs a turbo to muffle a bit lol

 

[95blkprobe]

thats awesome you got the megasquirt figured out. i may have some questions for you once i get mine in the car and wired up.

 

[bullshark524]

sounds awesome but you need to give us more (pics)

 

[jeffmsp]

ok what you wanna see? I am 1000 miles from my car right now fixing computers in the middle of nowhere (aka winnipeg manitoba) but will be back home on the weekend.

 

[ajkulish]

Subz

 

[Ricktalife]

I love seeing crazy ass builds like this. Kudos to you for thinking outside the box.

 

[mazdaspeedp]

sick car yo subbin

 

[jeffmsp]

 

[Spiced MSP]

looking good so far

 

[jeffmsp]

Quote:
haha, vids!
well my buddy pulled out his cell cam while we were cruising a road just off the forks of the credit.

mostly just puttering along but I go WOT a few times so you can hear how loud the car is with the 3" exhaust on a n/a bp. not a fan of driving crazy stupid through public roads so I am not pushing it or anything.

i dunno if your windows media player can view this without a codec(mine plays fine win7 media player), you cant see anything but you can hear how it sounds when I go WOT a couple times in the vid.

http://www.ctselite.ca/gtr/mspbp.3GP

its the meanest sounding n/a bp ive ever heard lol my guess is 100whp with the 3" catless exhaust with no resonators. I bet I am losing quite a bit with the 4-1 turbo manifold and big exhaust as it is for a turbo setup. Pretty much no power until 6000rpm then it pulls like a champ. I am running 7600rpm max right now via megasquirt. Narrowest powerband ever lol

Just waiting on a new oil drain for the T25 then she is going under boost for the summer. Also got my damaged rx7 460cc injector repaired so I am back to the 460s for now. Still looking for a deal on huge injectors.

 

[shane02pro5]

How about some rc750's ($200) bought them used not knowing they weren't plug n play then my sti 565's crapped out and put them in. Wasn't happy without sequential injection running 10.5afr's at idle.

I thought I'd do better with some brand new 730cc Denso Forester Injectors. But they did the same until I can afford a Haltech stepper motor I drilled a 1/8" hole in my tb butterfly to bump up idle to 900rpms. Idle surges a little but stable and doesn't stall any more

 

[MSP2003.5_Nick]

why would you drill a hole in your throttle body?? theres like 3 idle adjustment screws on it already. I had that problem running haltech with 565cc sti pinks. Just played with the throttle screws and got it to idle perfect. I was gonna get the stepper motor but mine idles like a boss with no IACV or anything. Cold start maps help a bunch with that.

 

[jeffmsp]

so far I havent had trouble achieving target AFRs, but then again I am on 460cc and stock cams and cam timing. i just adjusted my throttle stop until it idled nicely at 750rpm. Then I ran a vac line to a solenoid that is operated by a switch in my cabin. When I flick the switch the solenoid opens and idle goes up to 1300rpm. That way when I wanna warm up my car I just turn the switch on. Its nice because I can keep the car quiet when I start it in my garage and then roll out in reverse to the street. Doesnt wake up my neighbor that way ") Then I just flick on the switch once I get to the end of my street. My MS has provisions for a idle control but I havent gotten around to setting it up. Havent had a use for TPS yet either but will need to hook it up when I get around to playing with the flat shift option. (holds rpm at set point while you shift at WOT rather than have the engine bounce off the limiter)

the most surprising part of the swap so far has been how smooth the BP is at idle and low load comapared to the FS. With my FSDEs with just 2 solid mounts the car had lots of NVH. with the BP I have the medieval mount on the passenger side from the FS, then both the front and rear trans mounts are almost completely 100% solid (filled stock bp mounts with very hard compound) both attached to the crossmember. I reused the stock MSP crossmember rubber inserts on the new crossmember(undercarriage). The top trans mount is 100% stock MSP with a bracket welded to a flange I cut out in the shape of the BP flange.

The NVH is still there, but is considerably less than with the FS.

The 6 puck clutch with solid mounts took a bit to get used to, especially when you are getting drive through and you have to inch up in a line of cars.

 

[MSP2003.5_Nick]

I hear you on inching in traffic or drive through! I'm rocking ACT Heavy Duty pressure plate with 4 puck unsprung clutch. My clutch isn't variable its on or off. I hate when you get some dick in front of you in an automatic accelerating at snail speeds and you cant even get into first for a second before you have to push the clutch back in and put the brakes on cause you're car goes faster than his in first with no throttle. GOD!!!

If I even think about traffic I get angry.

 

[shane02pro5]

Thanks for the tip but running 750's is a bit more tricky promise!

 

[funkalicious21]

sub, for more reading... =)

 

[jeffmsp]

Thanks for the tip but running 750's is a bit more tricky promise!

I hope i dont run into the same issue, I am looking at a set of 800cc on ebay right now. I figure I might as well do a built BP after the BP05 and GTR eventually wear out so I am try to plan ahead.

 

[MSP2003.5_Nick]

Yeah we'll have to see, I'm also thinking of getting 800cc or more when I go back to the dyno cause I wanna go for 400 and the 565ccs wont be enough. From my experience with bigger injectors in hondas it's more the quality of the injector and how well it anodizes small amounts of fuel in the tiny idle pulses. Cause you can get 800cc and the nozzle looks like the end of a garden hose or you can get ones with 16 tiny little holes. Which one do you think is gonna mist better lol.

 

[shane02pro5]

My biggest problem I think is using my old ass Haltech F10a for fuel only (j&s controlling timing retard) that still allows stock ecu input for idle bypass (which I have backed out as far as it will go without hissing at me) and any change made to the throttle plate position. All will be solved when I switch to a Haltech 500 and stepper motor along with sequential injection.

My rc750's would repond differently than the denso's
rc's cut off below 1.350Ms and denso's cut off below 1.530Ms but both put me at a 10.5-11afr idle at that minimum flow number
I had to totally remap for a different flow range which was weird to me going from a 750cc to a 730cc injector??

75% duty cycle on 730's at 25-30psi at 12.2afrs

 

[MSP2003.5_Nick]

thats a lot of duty cycle for such a big injector. I'm at 80% running 22psi with 360whp. Full sequential injection FTW!! Your injectors must be wasting a s*** load of fuel firing on the exhaust stroke. Definetly get that going man.