About to throw this TB/plenum setup in the trash

white95 · Aug 30, 2016

Gratuitous engine bay picture

DKblue98GT · Aug 30, 2016

Have you cleaned out the IAC?

I put a70mm SR TB/Plenum combo on my GT a few years ago and had bad hanging idle. I made a restrictor plate and it didn't work very well. I cleaned the IAC with MAF cleaner and it fixed the problem.

Worth at shot...

g36 monkey · Aug 30, 2016

Nighttrain said:
What is the right fix? If you dont fool the sensor, can you set it differently with a computer?

Clean all the sensors, replace as necessary, ensure there are zero vacuum leaks, reset the idle by disconnecting the battery for 30 mins, then starting the car and letting it sort itself out.

The car wants to run correctly. All of those things help it.

The restrictor plate covers up where one of those things is failing. I made a restrictor plate too, but I am not fooling myself, the hanging idle problem is from a huge vac leak between my lower intake and the block.

Tally_4.6 · Aug 30, 2016

Def. missed the amazing 2.73 gas mileage for the first trip or two to Tally, then swapped rear ends and that went out the window.

96Mystic1189 · Aug 30, 2016

Frank.JD.Perez said:
2500 in 5th. its fun no doubt about it i just need more gear. more gear and some better gas mileage for the moment are my only issues with 410s. no joke 65mph vs 70mph is about 150rpm difference. 80mph is about 3k. ive gone over 100mph (maybe 110?) and it was under 4500rpm

What ya need more gear for lol?

96Mystic1189 · Aug 30, 2016

Also this settup does not fit under my factory strut tower bar, i had to push down as hard as I could to get the bolts to line up. It buckled the rubber coupling between the throttle body and the JLT intake but I guess that will have to do. I need it because the car is a convertible. Do any of the aftermarket ones offer more clearance?

Tally_4.6 · Aug 30, 2016

I wonder how much a stb would improve my convertible.

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96Mystic1189 · Aug 30, 2016

Tally_4.6 said:
I wonder how much a stb would improve my convertible.

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So much stiffer all around, especially on turning.

Nighttrain · Aug 30, 2016

96Mystic1189 said:
Also this settup does not fit under my factory strut tower bar, i had to push down as hard as I could to get the bolts to line up. It buckled the rubber coupling between the throttle body and the JLT intake but I guess that will have to do. I need it because the car is a convertible. Do any of the aftermarket ones offer more clearance?

Custom fab one around the tb

Frank.JD.Perez · Aug 30, 2016

96Mystic1189 said:
What ya need more gear for lol?

I don't have a cobra. My red line is like 5650. I want my gears to last longer than a second (1 &2)

Nighttrain · Aug 30, 2016

g36 monkey said:
Clean all the sensors, replace as necessary, ensure there are zero vacuum leaks, reset the idle by disconnecting the battery for 30 mins, then starting the car and letting it sort itself out.

The car wants to run correctly. All of those things help it.

The restrictor plate covers up where one of those things is failing. I made a restrictor plate too, but I am not fooling myself, the hanging idle problem is from a huge vac leak between my lower intake and the block.

Gotcha....didnt think of a vacuum leak dohh

96Mystic1189 · Aug 31, 2016

Oh ok I got ya now. I am doing pi heads with MHS stage 2.5 cams so I will be revving mine to about 6200ish rpm.

96Mystic1189 · Aug 31, 2016

Nighttrain said:
Custom fab one around the tb

I wish I was that cool lol.

96Mystic1189 · Aug 31, 2016

Hey guys question, If the plenum bolts lined up through the plenum gasket, that means it has to be on correctly right? Isn't there a tab that would hold it up if it wasn't sitting just right? The C&L plenum does not fit the curves of the gasket perfectly making it look out of place but I think its just the casting of the plenum.

Nighttrain · Aug 31, 2016

Loosen the bolts and wiggle lightly, see if it drops down any

ttocs · Aug 31, 2016

get some pics

lwarrior1016 · Sep 1, 2016

Just to put it out there, you can rev the 2v higher than 6200.

96Mystic1189 · Sep 1, 2016

lwarrior1016 said:
Just to put it out there, you can rev the 2v higher than 6200.

And still make power with a pi intake?

96Mystic1189 · Sep 2, 2016

Ok I thought this was fixed but it still kind of sucks. Its a lot better than it was but still hangs for a long time when the clutch is pressed. It seems to be worse once the car has heated up, but that could be in my head. Who knows, so I guess ill keep my windows up so people wont see me while I burn my clutch up.