Bought a CC Dually 454 Whipple

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Christian Steffen

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I guess I forget that this is 20 year old tech haha. And that's exactly what I was thinking, if something wen't really wrong you could see if before anything melted, though in most (if not all cases) the wideband would probably show something is wrong too.
 

Supercharged111

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So I did the swap 2 days ago and it sucked, had a massive vacuum leak and slam bang shifts. Last night I addressed the vacuum leak and modded the TPS to reclock it as it was showing something like 17% at idle. Also reset the idle and WOT stop screws and tightened the jam nuts that came nice and loose from the factory. Overall I'm pleased with the throttle body, but it seems I'm not done reclocking the TPS.

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I'm getting a P0122 which is TPS circuit low. I'm not sure what exactly that means, though I definitely had to swing that TPS well past factory zero as you can see. Maybe the TPS is supposed to relearn or something? Hopefully the folks on the EFILive forum can point me in the right direction.

So on the test drive the first night, I did see a slight increase in throttle response but it was overshadowed by the TPS reading artificially low which still caused the truck to downshift like crazy. Last night I made a huge discovery: the 350 uses linear linkage and a TB blade lip to get progressive (AKA garbage) response whereas the big block uses actual progressive linkage. This TB was equipped with a progressive linkage as delivered but thankfully also included a linear arm as you can see from left to right is big block, small block, and Summit.

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So what did I gather from all of this? Well you can't just slap a small block arm on a big block as they clearly draw from opposite sides and the cruise would never work, but there is a factory bolt on and go option that will convert your big block to linear and it's the LS1 car throttle body. If you have an automatic trans big block I HIGHLY recommend bolting one on and enjoying a much better OD holding ability and upshifts that don't hang and take FOREVER, plus a TCC that will actually lock and stay locked.

Here's stock vs 85mm

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And here's stock VS the TB I will upgrade to:

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Same OD on the outlet side, but you can see that the housing is thinner and less restrictive. I think there's a company out there that sells aftermarket housings for the early MAFs too but I'm drawing a blank as to who it is. So hopefully I don't break anything dragging the trailer tomorrow with the slam/bang shifts, it's time to pick up the Z06 from paint. :driver:
 

Christian Steffen

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So I did the swap 2 days ago and it sucked, had a massive vacuum leak and slam bang shifts. Last night I addressed the vacuum leak and modded the TPS to reclock it as it was showing something like 17% at idle. Also reset the idle and WOT stop screws and tightened the jam nuts that came nice and loose from the factory. Overall I'm pleased with the throttle body, but it seems I'm not done reclocking the TPS.

You must be registered for see images attach


I'm getting a P0122 which is TPS circuit low. I'm not sure what exactly that means, though I definitely had to swing that TPS well past factory zero as you can see. Maybe the TPS is supposed to relearn or something? Hopefully the folks on the EFILive forum can point me in the right direction.

So on the test drive the first night, I did see a slight increase in throttle response but it was overshadowed by the TPS reading artificially low which still caused the truck to downshift like crazy. Last night I made a huge discovery: the 350 uses linear linkage and a TB blade lip to get progressive (AKA garbage) response whereas the big block uses actual progressive linkage. This TB was equipped with a progressive linkage as delivered but thankfully also included a linear arm as you can see from left to right is big block, small block, and Summit.

You must be registered for see images attach


So what did I gather from all of this? Well you can't just slap a small block arm on a big block as they clearly draw from opposite sides and the cruise would never work, but there is a factory bolt on and go option that will convert your big block to linear and it's the LS1 car throttle body. If you have an automatic trans big block I HIGHLY recommend bolting one on and enjoying a much better OD holding ability and upshifts that don't hang and take FOREVER, plus a TCC that will actually lock and stay locked.

Here's stock vs 85mm

You must be registered for see images attach


And here's stock VS the TB I will upgrade to:

You must be registered for see images attach


Same OD on the outlet side, but you can see that the housing is thinner and less restrictive. I think there's a company out there that sells aftermarket housings for the early MAFs too but I'm drawing a blank as to who it is. So hopefully I don't break anything dragging the trailer tomorrow with the slam/bang shifts, it's time to pick up the Z06 from paint. :driver:

Man, would not have guesses this would be a pain like that. What is the tps voltage when closed? I might leave my tb alone.
 

Supercharged111

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Not sure, but your best bet would just be to convert to linear linkage if it's not already.
 

Christian Steffen

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I saw some people on the hp tuners forum saying a reflash can sometimes reset tps, as long as the voltage isn't way out of wack. Seemed like below .7v would be acceptable.

I'll take mine off today and figure out what the hell I have, I can't even remember where I bought the damn thing.

Also, we need some pics of the vette, or at least I do haha.
 

Christian Steffen

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Not sure, but your best bet would just be to convert to linear linkage if it's not already.

Looks like i used to be fairly naive lol this thing is not 80mm like I thought, looks like it was ported some though. Throttle blade is still 75mm and it's a progressive linkage. So I'll probably hunt for an ls1 tb.

My five year ago self had a lot to learn lol
 

BowtieBrody

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Boy howdy I'm glad I subscribed to this thread. Big blocks and boost, nice ass cars, and technical **** I never knew you could do!
I'm in love with the Vette; and what's your race car in your sig? I don't think I've seen anything about that unless I looked over it?
 
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