Can someone recommend a 102mm throttle body for high boost applications.

While the Nick Williams unit looks nice it is not cutout for boosted applications

 

It depends on who you talk to. I've had conflicting statements. Forum members seem to say " No", while some suppliers say "Ok" up to 12 to 15 pounds.

I'm confused and will try today to get some info from the actual manufacturers.

I'll keep you in the loop.

 

I dont Remember the brand.. but i know that KP racing had some 105ish MM TB on a Zr1 they did a while ago.. but i dont know how they act having air pushed through them VS pulled through like on the zr1.

 

Sorry I already have the NW and it closed at wot from boost pressure. Vengeance added more voltage to keep the blade open but it's become symptomatiC again.

Most recently it failed and left me stranded.

I press the pedal and have no throttle position response.

I think tpis makes a unit built for boost. Motor will see 30psi

 

Wow that blows..

 

We usually have the same issues with the aftermarket TBs.. Generally we run the stock 90mm TB's with great success under boost.. As you saw in Ocala though at 32psi the stock tb was shutting down on us on yur2slo's. With the Haltech ECU we went cable pull and put a 102mm Fast on, however, it's not a one two three thing to trick the stock computer that there is still an operable TB on there (Otherwise it wont start, however, we know what works for this so we can share the info)... We actually have the FAST 102 w/ the vanjen welded onto it still up for sale as we have stepped up to a Marcella 125mm TB for the new build.

If you must stay electronic, what about going back to a stock unit ?

 

What is KP using on kelly Bises' 2000 rwhp vette? that should work,

 

Kellys is a 108mm throttle body, and as of yet I have had no issues at 32lbs, but I think we are switch to a cable due to the vast issues with drive by wire throttle mfgs. I don't want to fail safe a tb at an event. We ran 24lbs at the mile with no blade closing issues. There is something up with how the center-line of the blade is on the Nick Williams, I guess the boost tries to close it, on the 108mm and the TPIS I think the blade center line is on the opposite side and tries to keep it open.

 

What is the diff between your 108mm and the NW 102? i hear NOTHING but problems from the NW TB and no issues from your 108mm

 

Housing design I suppose. Its made by Australian company southways

 

TPIS is what I see being used.

 

Well I'll throw my .02 in your thread. I too ran the NW 102 on mine and all seemed fine for a while. It then began acting weird closing just when the car would start coming in to boost. It would close and then re-open instantly causing the car to do a quick nose over and back up. Mind you I'm on Pro EFI and still using the factory computer to operate it. I made 32lbs on it on the dyno and have ran @ 25lbs on the street with the NW's but kept giving me tuning fits so I went back to a stock TB with a Wiggins clamp and called it a day for now. The other larger TB's I found that would supposedly work well on FI cars were outrageously expensive is why it was my choice to go back to a stock TB. I could afford it, but cant justify the gains or lack there of on a FI car such as mine. I made 1200 on my Stock 78mm TB on my old Camaro and a this 90mm should do the 1500 I'm capable of now etc... GL. Post up what you end up doing or purchasing I'd be curious. Thanks
Jeff

 

Im going to try and stay DBW, I finally have the car running perfectly and dont want to risk mucking with ProEFI any more

Looks good, the vendor messaged me so Im working to get this purchased

Im intrested in this as well but they claim to be redesigning the unit and are two months away from production

I am done with NW. It was blowing closed back in may and it took a lot of tuning trickey to even make it operable so I could have my car back.

I too would have the unit close on me and completely lock leaving me on the side of the road four times the most recent resulting in a tow...

 

From the consensus, I suspect that the NW sucks when you blow it.

 

Good info!! I was just about to pull the trigger on a NW for my boosted application... I have a couple moths to wait for TPIS. bullet dodged

 

I just called TPIS and ordered one but it was a bench unit. What ever still should get me running

 

tpis uses the ls2 motor which seems to respond better and is 102 mm, im running the southways 108mm tb right now with an ls7 motor in it and it is also functioning no issues with boost yet

 

I have tried 2 NW 102s and it has been hell and they still don't work under boost. I'm going back to a stock 90 until something better comes out.

Daren

 

Same old, same old.

Here's the response from NW and HP Tuners screenshots what happens when under enough boost:

http://www.camaro5.com/forums/showpo...&postcount=693

 

If the TPIS fixing my symptoms and gets me running you all will be the first to know