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Thread: Billet 70mm TB, first batch arrived!

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Posts: 41-50 of 53
2010-09-20 23:49:21
#41
Originally Posted by Teal97
Dre. whats a cold start valve do? for the past 5 years i've been running my VE with my old lowport DE t/b. there are 3 ports on it. i've had those capped off for all 5 years and not had ANY cold start issues. i live in western washington state. so why does a (N1) t/b (or any other for that matter) have to have a cold start valve?


The N1 TB and standard VE TB does have a Cold start valve or fast idle.

If your is working fine with no cold start issues then you are kucky, this is not the norm.
2010-09-21 04:25:16
#42
It's better for the throttle body to be without the VE cold start and fast idle valve if you hope to have a good cold idling and running engine. Most of the complaints are from people who are running with the VE cold start valve and not the people running the stock B13 or B14 throttle body. Here's why.

Most are running DE ecu with the VE, and the DE bins don't have the VE warmup strategy and programming to get a good cold running and idle. The fuel and timing is not optimum for the VE TB. The DE based bins have a target idle speed at different engine temperatures. It's usually at 1500rpm below 68*F. The problem is, if you are running the VE TB, the added throttle opening by the cold start/fast idle valve, when the engine is cold, causes the idle to be more than 1500 rpm. The ecu will try to correct this and to get the engine to idle at 1500, it will retard the timing. We all know how crappy the engine drives with retarded timing.

This problem will magnify if the TB is bigger. The bigger TB will have a bigger throttle opening per throttle angle. The cold idle speed will be higher and so the ecu has to compensate even more by trying to retard the timing. For the people runing the VE TB, you can see this by disconnecting the tps sensor and starting the engine when it's cold. You will see how high it idles without the help of the ecu idle stability program. Once you unplug the tps, the ecu won't try to retard the timing.
2010-09-21 05:36:22
#43
I personally have all that, cold idle valve disconected and have no issues with cold idle, but anyway its a nice looking piece!!
2010-09-21 06:12:35
#44
i had super high idle issues with my car when i had the stock ve TB on, also have issues with the iacv tho.. car idles great when warm couldnt be better, but when cold i gotta hold the pedal a tad to start it an continue holding it for 30 seconds an then slowly release.. it drives poorly when cold but not as bad as some stock cars i've drivin..

5speed mentioned something in another thread a while back concerning the injectors bein bigger then what the stock de ecu is used to an that would cause issues with startup an reccomended to adjust it in the ecu, i tryed this an it worked nicely! i use to have to hold the throttle for a few minutes before i could let go of the pedal, an if it wasnt completely warm before i took off it'd want to die.. props 5speed!
2010-09-24 23:29:24
#45
contact me plz
Originally Posted by Autech

70mm is 70mm. But when it comes down to 440usd for a genuine N1 vs 260usd, theres a bit of a difference.


i pm'd and emailed you. the email was returned as undeliverable. contact me plz. TIA
2010-09-25 18:03:11
#46
Nice TB you made.

But there lots on ebay that is pretty cheap too. like this one 100buck.
70mm Universal Throttle Body CNC BILLET SENTRA SER GTI: eBay Motors (item 160483632887 end time Sep-27-10 14:02:31 PDT)
2010-09-25 19:16:28
#47
Originally Posted by Redline
Nice TB you made.

But there lots on ebay that is pretty cheap too. like this one 100buck.
70mm Universal Throttle Body CNC BILLET SENTRA SER GTI: eBay Motors (item 160483632887 end time Sep-27-10 14:02:31 PDT)


2010-09-26 09:07:46
#48
^^ This...
2010-09-26 19:46:49
#49
My mod list is in my signature.

Now with a 70mm throttle body, everything else remain untouched, what gains will I be looking at?

Thanks
2010-09-26 21:20:23
#50
NeoVVL Forums :: View topic - Porting intake manifold + Bigger TB

6hp and 5Nn from porting stock IM and 66mm TB.
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