John Millican

iTrader: (1)

Please tell us if you used the stock throttle body and post a close up picture of the linkage side if you can.
Seems there is a question about the linkage hitting the coolant fitting. I can't tell for sure, I have an aftermarket Accel 58mm TB.

ThirdGenZ28 92

Also Id like to see timeslip proven comparisons between the stock and LT1 manifolds with the only difference being the manifold if possible. Someone should surely have had a chance to fine tune things by now and get some numbers?? Anyone??

tpi_roc

How does this relate to johns post? Stop hijacking other peoples posts and go post your own if you have a question. Times have nothing to do with fitment.

GofasterFirebird

iTrader: (3)

I used the stock TB. I do not have pics yet. I had to very slightly clearance the TB pulley. Also, I plan to have mine running very soon and will attempt to run the car with the only change being the intake.

John Millican

iTrader: (1)

OK, are you running an early style TB ('85-87) or late style ('88-92)?

Formula383

iTrader: (3)

John I will be using an aftermarket TB from Holley (Late Style 89). I guess this has someting to do w/ the question I had asked you.

GofasterFirebird

iTrader: (3)

I have a 1990 L98

John Millican

iTrader: (1)

OK, upon further research it looks like the problem might be limited to Corvette TB's with the bicycle "pulley" style throttle cable type.
Camaro's sem to only use the "singe point pivot" type cable.

ThirdGenZ28 92

My bad for asking a question out of place youre correct and I wasnt paying attention but I dont go hijacking other people's posts like you insinuated, I made one post with a question which you alerted to my attention. If I want to know Ill make a new topic I was just looking for some info since the search of this topic doesnt yield much in terms of ETs.

Blackened

When my camaro was stock and had a TPI on it, it had the "bicycle" type pulley on it. I think it's more like... 89-up have the bycicle type pulley on it and 85-89 have the single point pivot style

John Millican

iTrader: (1)

OK thanks! This is what I was looking for. I had thought only the Corvettes got the bicycle cable.

You guys/gals are awesome.

Rob P

iTrader: (1)

John, both my 92 TB's have the bicycle type TB.

super83Z

well I got a 89-92 style and I got that bicycle style too.

89ProchargedROC

they are correct, from 89 and up on F-bodies they had the bicycle type. 88 and earlier were the other style

89Irocz23

so which style do you need for the lt1 intake? I put my order in for john, but im ordering a after market throttle body. Which year should I tell them then. I have a 89, but I also have a 87 throttle cable sitting in my garage so the cable is no biggie I just need to know which year I should order it from.

John Millican

iTrader: (1)

I have the early style TB. It's an Accel 58mm. It's a '85-88 apparently due to the single point pivot cable. It does work fine.

I am still looking for pictures of completed LT1 intake swaps of the TB area.

89Irocz23

hey john are ya getting any of my e-mails? Jw hotmail has been acting up on my lately?

John Millican

iTrader: (1)

Yes I have. My mail account has been of and on for the last 2 days. related maybe?
I did send a reply today.

RCR

The master asks for a picture, the master get two pictures:hail:



Mine is a stock '88 throttle body. I was concerned about clearance so I put the coolant line in the back. The second picture shows where the throttle is at WOT. In both pictures you can see where I plugged the original hole. No problems with the coolant yet, and it's been pretty warm. I also have the stock 305 single fan still on it

John Millican

iTrader: (1)

You cheated RCR.

Anyway, I am having problems with '89+ TB hitting the coolant fitting. The '89 TB's changed the linkage style. Damn GM.

AaronIROCZ

iTrader: (5)

What type of bracket is that??? I ordered one from a 93 lt1 camaro and it DOES NOT even come close to lookint like that. Also I am running the 87 style hrottle body and I have NO problems what so ever. I just rotated the 90 angle hose away from the intake to fit even better.

John Millican

iTrader: (1)

RCR made his own throttle bracket. He's good like that.

The reason your '87 TB fits so well is due to the linkage, they changed design in '89 and those people are having troubles.

slayer2000

iTrader: (1)

is there any internal difference between the older and newer style throttle bodies? I'm getting ready to mod my lt1 intake onto a 90 gta but I also have a spare 86 model tb. Also I wonder if it would hurt to drill and tap the pipe tap hole for the coolant fitting into the manifold at a slight angle, maybe 5 to 10 degrees?

John Millican

iTrader: (1)

I don't know of any internal differamces in early vs. late style TB's unless maybe it's the IAC ports. Can someone shed some more light on this?

Yes, I could drill/tap the coolant fittings on the LT1 intake at a slight angle, think that would clear the late style TPI TB?

For what it's worth the LT1 TB clears the fittings no problem.

anesthes

iTrader: (12)

The ports are a little different for the IAC, also the bores have thinner walls. We bore ours out to 52MM and the older style throttle bodies seem to have less matter to bore

-- Joe

GofasterFirebird

iTrader: (3)

John, I moved my drivers side coolant fitting back as far as it would go and still align with the coolant passage in the head. You can work the throttle and see how it get the close about 20 degrees of opening. So I clearanced there.
I modified my throttle bracket and I think it works very well. Plus, I didn't have to shorten my cable. Basically a .5 inch think spacer with a set screw to hold the plastic cable end. I found it at the local hardware store.

GhoSSt

iTrader: (1)

Ask and ye shall get.. well.. something.

It's hard to tell from the pictures since the powdercoating makes it all look the same. This is my small block 400 I pulled from the Caprice to fix an issue with the rear seal..

But I'm using an 89+ TPI TB, with a 1994 LT1 IAC setup and I have LOTS of room. But note that I'm using AN10 fittings instead of pipe nipples.




Hope this is helpful.

Formula383

iTrader: (3)

John what about a Throttlebody Spacer. Go to www.airaid.com they have one for a Vette up to 1992.Its for the stock TB,the thickness of the spacer is 1 inch.Maybe that would help. If this is a possible maybe the holes can be opened up at a machine shop to match the openings for the 58MM TB.

SATURN5

From what pics I've seen, that clearancing is already needed to clear the TPS and IAC at the idler mount. Moving the TB forward will only make more cutting to clear..and theres no way your gonna get an extra inch..

On a side note, John are you considering selling the angled adapter seperatly? cheers, Bob

tpi_roc

I was going to ask you the same

That spacer up for sale?

slayer2000

iTrader: (1)

hey RCR, could you post a pic of how you ran the coolant lines? I think running them from the back of the intake would be a lot cleaner looking. Also to john I was wondering is the distributor spacer bolted on or do you just have to silicon where it touches the manifold then use a regular gasket on the other side?

John Millican

iTrader: (1)

The distributor spacer is screwed down and RTV sealed.

I don't sell the angled spacer seperately.

RCR

Slayer:
I don't really have a clear pic, but this one might help with an explanation:


As seen from my above pics, I blocked the coolant passage under the throttle cable. I used the passage at the back of the head. This line runs to the remote thermostat at the bottom right of this picture. Right next to that line on the same side of the thermostat housing is the temperature sensor. I flipped the divertor valve upside down so the coolant line ran towards the fender. You can see the bottom of the divertor next to my oil dipstick. I ran that line and the second line from the head (in front) together around the back of the fan shroud. You can see both lines in front of my air filter. They loop down under the main coolant hose to the front of the thermostat housing.
I hope that helps.

slayer2000

iTrader: (1)

thanks rcr, I was thinking about trying to run both lines from the back but I thought some one mentioned overheating problems with that setup. Have you had any trouble with yours?

tpi_roc

slayer2000

iTrader: (1)

I was talking about running both lines from the back. I read RCRs comments but from what I saw he's only running one line. I just wonder if I were to run both lines from the back if that might cause a local overheating problem with the front 2 cylinders?

RCR

Honestly, I don't know enough about how the coolant system works to say whether having the two lines in the back will hurt you. I was told having one in the back would screw things up, but so far so good. I don't have hard numbers, but in stop and go traffic with 90+* temps, my car was at 221* yesterday, which might be a little lower than last year before the swap. I don't know if it's better, but I keep a close eye on the gauge. Someday I'll get a dual fan.

Swapmaster

Running the lines from the back will not hurt anything. In fact it
will help keep the engine cooler. The back of the block runs hotter
than the front during normal operation. There is not much water
circulation going on back there. Convection is relied on to carry
away the heat. So drawing from the back would be a good thing.
That is what I am planning to do.

Chris Etemadi

I just received my LT1 intake today. And put my 91 throttle body on, There is definately contact that would prevent ANY throttle movement when bolted down. I think it is fixable with a cut off tool, and five minutes. But the Intake looks great, Thanks John.
I will see If I can get some pics with my friends digital camera. It looks that if the nipple was 3/4 of and inch shorter that It would clear. (with out the hose)
I will go by NAPA towmorrow and pick up a couple 90degree hoses.

Iroc n roll

Hello everybody. Sorry for the several month hiatus but I'm back again. Here are two pics from my install I posted awhile ago back in January. I have the 85-87 style setup and could not clear the coolant lines in the manifold. It hit at about 1/2 throttle. Luckily I use a NOS plate which basically saved my ***. Since I have a V-belt setup I did not have to worry about clearing the tensioner. I did have to hack the alternator bracket though. The first pic shows the linkage without the plate and the second shows the plate.

Iroc n roll

second pic

Omega

iTrader: (1)

Hmm, I see an interesing plate between the TB and intake

Would it not be easier to use a 90 deg. fitting and route the hose from the front?

Blackened

Yeah and I think one of his manifold hold down bolts is half way screwed in !

John Millican

iTrader: (1)

Nope, it just won't go any farther due to the angle change. The hole was slotted and the bolt is all the way in and touching the inboard side of the intake.

Iroc n roll

I explained the plate in my post. The plate was easier to use since I already used it anyway. I have since replaced those old bolts whith smaller allen head bolts that go all the way down.

89Irocz23

Hey I've noticed you guys seem to have something over the injector wires. Mine are just wires. What do you have over those.

tpi_roc

There is rubber boots over injector wires from the factory, to make it look perdy.

PhoenixxZ

I realize I'm bringing this post back from the dead ... but I have a question abou the Corvette fuel rail covers in the above post. It looks like they can't be used because the throttle cable would be in the way. Is that true ?

Iroc n roll

To use the fuel rail covers some rigging is required. I had to cut some pieces off of both sides to make them fit properly. But that was needed to clear the fuel lines and such. My throttle cable isn't in the right place either. I'm in the process of creating a bracket for my setup. I don't know about the other guys but my cable didn't fit into a 93 bracket. My fuel rail covers do fit, but hacking either way was required. As for the throttle cable, I have enough clearance for it to use the covers even with the way I have it now.

John Millican

iTrader: (1)

The '93 throttle cable bracket must be modified if you are to retain the stock TPI TB and cable. I have a picture of the mod on the "updates" section of my webpage.
http://www.lt1intake.com/update.htm