5KTQ broken when Ice racing now fixed

[Timmmy]

Hi Nate,

Thanks for the heads up on the additional injection. I had no idea the
034efi setups were so well developed, or widely used. Definately looks
like the way foreward. Probably not the full blown setup as I am trying to
(hahahah) keep this thing a low budget toy. Undoubtedly I will probably
end up doing the whole thing though.

As for the granger valve, that is definatly after I resolve my current
fueling issues. On that note, if there a better way to move past the
limitations I have with my current modded computer to remove the fuel cut?
Will the efi 034 help with that? (I am still learning about this 5K
system, very different to either carbs or the newer systems I am use to.)

Finally I would love to come along to the maine rally, and bring my dirt
bike. Send me some more info so we can set something up.

Cheers


Timmmy

Timmmy (Imlivinalie)
86 5KTQ - Fast...ish
01 MX5 - RWD Autocross Toy
98 Triumph Daytona 955i - Cop Bate.
91 RM125 - Oh yeah!(I broke it again)
Various others!



> Timmmy said:
>> Hi ALL
>>
>> way back when it was still snowy I managed to do something to my 5KTQ
>> while ice racing that caused it to not build any boost , and not rev
>> past
>> about 3.5K.
>>
>> After much investigation I could not find the issue, gave it to Chris at
>> Force5auto, and he had it for ages and couldnt find the problem either.
>> Between us we checked just about everything. Then Chris had a flash of
>> inspiration and found the problem.
>>
>> Melted the new 3" highflow cat, so bad it blocked the exhaust to the
>> point
>> it could not exhaust enough gas to let the engine build boost.
>
> Yup, that'll do it. :)
>
>> Have since fixed it, put and AR gauge on it and it was definately
>> running
>> lean. Anyone out there have any recommendations for additional injectors
>> I
>> can trigger with a couple of boost pressure switches. I would like to
>> only
>> use one or 2 if possible. Has anyone ever tried using the cold start
>> injector to add additional fuel at high boost.
>
> No, no way, don't do it. It's been hashed over time and time again here.
> Don't use the cold start valve for fuel enrichment under boost. With the
> added boost you have now, your fueling accuracy is even more critical.
> Just dumping more fuel in is not the answer, and will most likely lead to
> more problems than solutions. You need to either figure out if the CIS
> system can be adapted to supply more fuel/less timing to match the boost
> you are running, use a 3rd party secondary fuel system to add fuel when
> needed, or go whole hog and put a complete EFI system on the car. Trust
> me, there's no going back once you've seen what an opened up I5t will do
> with a good engine management system and some room to breathe. Javad has
> both the summplemental systems, and the full EFI ecu's availible at
> http://www.034efi.com . No affiliation, just a happy customer, and the
> 034's probably have the largest active I5 base around. More info on my
> website (in dire need of updating) at  http://www.motorgeek.com/90tq and
> our forums at http://www.motorgeek.com The 034IIc Ran my 10vt engine
> without even trying, and now it's running the V8 I have in there
> perfectly.
>
>>
>> I intend to add a granger valve to the computer line to allow me to
>> boost
>> past the hard fuel cut at 1.9bar, but I definately need more fuel at the
>> top end now.
>
> Ick, you can do that, but if you're already running lean you need to get
> that fixed first, then think about running the boost up.
>
>
>
> On a completely seperate note..... you gonna be making the Maine Forest
> Rally this year? There may be a group of Audi nuts from ME/NH/VT there on
> dirtbikes when we're not watchin the races.....
>
>
> Later!
> -Nate
> '89 90v8q
> http://www.motorgeek.com
>