Map?,Tps?, Weber, manifold and 4age?

Zzleeper · Post by **Zzleeper** » Fri Oct 19, 2007 1:03 pm

Hi!... Is there anybody out there who could tell me what to use?
Map sensor or TPS? If You recommend the Map sensor I'd be happy to
see a picture of your arrangement with the vaccum tubes and cannister.
This is going to be a Toyota 4age with a N/A dual Weber 40 side draft DCOE's setup.

Thanks in advance.
Zzleeper

Post by **brentp** » Fri Oct 19, 2007 2:47 pm

Welcome!

We have a recently updated FAQ that will help you choose between the two.
http://www.autosportlabs.net/Choosing_b ... MAP_or_TPS

Also there's an excellent discussion on the results from using balance tubes and a separate vacuum canister.
http://www.autosportlabs.org/viewtopic.php?t=1171

Hope this helps!

Zzleeper · Post by **Zzleeper** » Fri Oct 19, 2007 4:05 pm

Thanks! It looked good. Especially the graph that Matnrach had supplied, made me understand more.

Zzleeper

widebodyhachi · Post by **widebodyhachi** » Sun Nov 25, 2007 10:43 pm

Has anybody had any luck running map and a plenum when using big cams, im building up with 304 and 288 im worried about getting a decent reading from side draft manifold but in saying that I dont know how I can et a TPS reading from the carbs as there purely mechanical linkages?

MartinM · Post by **MartinM** » Sun Nov 25, 2007 10:57 pm

Welcome!

To do TPS, you need a Throttle Position Sensor suitably mounted on the mechanical parts of the carb - to translate the throttle pedal position/angle of the butterflies to a voltage that is measured by the MJLJ to determine the ignition advance.

Although I guess you're not using these carbs, http://www.cate1.co.uk/megajolt/installation.php gives you the general idea.

Regards
Martin

widebodyhachi · Post by **widebodyhachi** » Mon Nov 26, 2007 1:10 am

cheers heaps I dont know how many times ive reed through that set-up and I must have skipped over that same section, lol right in front of the old nose the whole time ay

MartinM · Post by **MartinM** » Mon Nov 26, 2007 1:05 pm

No problem - also, as I wrote my response I was wondering about fitting a TPS to the actual throttle pedal rather than the carb...

...I wonder if anyone has ever done that?

widebodyhachi · Post by **widebodyhachi** » Mon Nov 26, 2007 9:17 pm

I just wonder if there would be a "real time" timing problem, theres a few mechanisims to have to go thru before the throttle plte, TPS already isnt the most acurate lol