c3 throttle body spacers
Le Mans Master
Joined: Oct 2010
Posts: 6,930
Likes: 842
From: melbourne florida
2023 C3 of the Year Finalist - Modified
it is said it takes about 20 H.p to feel an increase in the seat of your pants, i would think 20 h.p with just that addition optimistic at best.
those systems need lots of work to get anywhere.
those systems need lots of work to get anywhere.
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
With the stock air cleaner removed, I think you'll be bumping into your hood with that set up. The biggest bang for the buck is the Hypertec chip then if opportunity strikes, aluminum heads with the renegade manifold will put you near the 300 hp mark without sacrificing any low end torque that crossfire are known for
Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
With the stock air cleaner removed, I think you'll be bumping into your hood with that set up. The biggest bang for the buck is the Hypertec chip then if opportunity strikes, aluminum heads with the renegade manifold will put you near the 300 hp mark without sacrificing any low end torque that crossfire are known for
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
With the stock air cleaner removed, I think you'll be bumping into your hood with that set up. The biggest bang for the buck is the Hypertec chip then if opportunity strikes, aluminum heads with the renegade manifold will put you near the 300 hp mark without sacrificing any low end torque that crossfire are known for
Supposedly the spacers help with the air flow. I know I have never had any problems with what was called puddling of fuel under the tbi's when vanes are removed. My vanes are still there, but the vertical sides of the vane body are dremeled away.
Hard to tell what improvement came from the spacers as I did alot of mods at the same time - porting, vane modification, fuel pressure bump, 85 fuel pump, open air cleaners (like the picture posted in this thread), injector spacers, iridium plugs, DUI coil, magnecor wires.
Do know the performance is a good bit better than stock. Am in the mid to high 6 second 0-60, vs the upper 7's for stock.
If you remember Twinnie/Twin Turbo, he made fun of my setup - called it a submarine sandwich. Twinnie is long gone and I am still here. He was too full of himself, albeit knowledgeable.
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
actually huggie they fit quite nice under the hood see first pic. it even has a 1/2 inch spacer under throttle body you can see from second pic. i might rework the inside of the hood a bit to get some of the cool air: second pic.... also already have the hypertec chip and 160 thermostat, 2 inch throttle bodies, reworked the intake runners, ported the heads, opened the stock headers as much as i could.... done alot on this build and not quite done...... yet.
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
I used wing nuts for hold downs. Not the best, but I don't care. Wing nut on passenger side will hit the lid if turned the wrong way. Have new engine mounts so not a problem with too much engine move. I am just, literally, at the limit. Sometimes I think about removing the spacers. Twinnie said they are useless. But we were having a pizzing contest way back when, so I left them. Have the gaskets to get rid of them. Maybe when weather gets warmer and I am no longer on a consulting job I will get rid of them.
Pro
Joined: Sep 2012
Posts: 600
Likes: 6
From: Key West Florida
i would look more at porting the intake manifold, when i removed the intake from an 84CFI i was surprised to see that nearly half of the intake runner is left filled in, it seems to leave alot on the table so to speak in terms of flow.
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Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
I used wing nuts for hold downs. Not the best, but I don't care. Wing nut on passenger side will hit the lid if turned the wrong way. Have new engine mounts so not a problem with too much engine move. I am just, literally, at the limit. Sometimes I think about removing the spacers. Twinnie said they are useless. But we were having a pizzing contest way back when, so I left them. Have the gaskets to get rid of them. Maybe when weather gets warmer and I am no longer on a consulting job I will get rid of them.
Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
wait till ya see what i did with mine : ).... i'll post pics soon
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Here is picture of the offset for the lid screw down.
Also shows how I put a fuel pressure guage WITHIN the air cleaner. Another thing Twinnie and Ken73 could not be done. Again, neither show a presence here. Practical solutions drove them crazy.
Also shows how I put a fuel pressure guage WITHIN the air cleaner. Another thing Twinnie and Ken73 could not be done. Again, neither show a presence here. Practical solutions drove them crazy.
Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
i see how you did your gauge. is the material thick enough to get good threads there? you could actually hook a hose there and remote mount your gauge.
i dont know twinnie or ken... i am very new to forums although i've been a professional mechanic all my life.
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
i bought my vette as a basket case allready in pieces. is that the original location for the stud with the oem air cleaner? mine is also offset like that.
i see how you did your gauge. is the material thick enough to get good threads there? you could actually hook a hose there and remote mount your gauge.
i dont know twinnie or ken... i am very new to forums although i've been a professional mechanic all my life.
i see how you did your gauge. is the material thick enough to get good threads there? you could actually hook a hose there and remote mount your gauge.
i dont know twinnie or ken... i am very new to forums although i've been a professional mechanic all my life.
Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
I had a mechanic where I work tap the injector top. Gave him the 2 90* brass elbows. He tapped them overnight and never mentioned a problem. Had that setup for about 10 years. No leaks or anything. Did use teflon tape, though think I have heard that it does not do well with contact with gasoline. Again, no leaks.
i woked and engineered hydraulic systems for many years with pressures over 200 times the 15psi on these tbi
your setup i'm sure works fine
Thread Starter
Heel & Toe
Joined: Jan 2014
Posts: 16
Likes: 0
