I have a TB from an LT1 engine and am planning to use it with my LT1 intake that I'm putting on. It has the cam style throttle linkage but my throttle cable is currently the old style one that goes over a pin, can I just change throttle cables and have it work ok? Will the cable fit the LT1 throttle bracket?

 

The throttle body's "lever" (where the cables connect) on the driver side will always touch the front coolant fitting. You'll have to use a L98 style throttle body.

 

are you saying the L98's TB "lever" will clear the fitting? If not, then why can't I use an LT1 TB? they're interchangeable, the only issue I'm concerned with is the "lever", not the actual TB.

 

The L98 throttle body will clear the front coolant fitting. The LT1 throttle body will not clear the front coolant fitting...I don't even think it will bolt on with the fitting in place.

The LT1 sensors all accept different plugs. Your TPI harness will not plug into the LT1 throttle body sensors. I'm speaking about the 94-97 LT1 throttle body. I do not know if the 1993 LT1 throttle body is different.

Use the L98 style throttle body.

 

ttt, still trying to resolve this. as far as i know the 89-92 tpi tb and lt1 tb throttle linkage is identical so if the tpi one will clear why wouldn't an lt1 type clear?

 

Guys, there must be a good reason, so forgive me for asking this:

Why go through all of the hassle of adapting an LT1 manifold when you can simply get a MiniRam that will likely perform the same or better, and will bolt on to the engine as is? Is it cheaper or something? It just seems like a lot of work... different coolant passages, different flange angle, different port shapes, etc...

 

i'm doing it because it's the cheapest way to go and i'm a semi broke college student. if i'm not happy with the results i'll probably sell it and get a stealth ram or somethin

 

Ah. Been there, done that. It wasn't until I got out of college that I was really able to start building mine. Up until then it was simply "just keep it running".

 

Unless you have an intake that has already been converted with front coolant fittings........John has started putting the coolant passages in the back of the intake so there shouldn't be any problem with using the LT1 TB except that the sensor conections are different. A few snips at a junkyard should cure that.

Hodge

 

the intake has already been modified with front coolant passages so that's no good

 

You have two choices then.

1. plug the front coolant fittings and install them in the rear

2. or scrap the LT1 TB and get a L98 TB.

 

Here's a picture of a LT1 throttle body on a modified LT1 intake with coolant fitting in the front. As you can see there's no way to get the coolant hose attached. Don't forget that the throttle cable will need to be LT1 style as well if you stay with the LT1 TB.

 

Yes the LT1 intake is cheaper overall. It will not perform the same as the MiniRam though.

 

And what do you base that statement on? Sounds like opinion to me.

 

Earth to John.

The MR has shorter runners and larger ports.

Wake up, quit BS'ing and join us here on the dry land.

thanks.

Matthew in Albuquerque

 

Thats funny.. the MiniRam was designed by one of the people involved in diveloping the Lt1. The Lt1 and MiniRam are EXTREMELY similar in design, with the MiniRam being slightly better.

Earth to YOU... think before you speak.

 

Right.

And the Edelbrock LT1 intake had no gains over the stock LT1 intake.

What's funny isn't that you're hanging off Johns sack. It's that all I said was that they would not perform the same. I didn't state numbers. I just said they would perform differently.

Why do people with cheap crap like modded LT1 intakes and poly a-arm bushings have to talk their stuff up like it's the sliced bread best invention ever when it's clearly not? I dont' give a hoot if you want to run something because of price. Your car, your purchase, your decision. But when something is misrepresented just because you run it, it's absolutely funny.

I do think before I speak. And I step up and buy the best there is, instead of pumping up my second-best parts as being the same when they're not.

I have not the means to dyno a MR-II or III vs. the LT1 intake, or I would. Feel free to do so to make me eat my words. I'll patiently await the proof to arise from the pudding.

Look at my original post. I didn't start anything in this post, other than represent that the two intakes would perform differently.

-Matthew

 

How about just replacing the straight coolant fitting with an angled or 90* one?
Or what about making a spacer for the TB to move it forward a bit?

 

Prove it Matthew. I say their the same. Prove me wrong.

 

What do you mean 'cheap crap like modded LT1 intakes'? It's made from the same aluminum as an overpriced Miniram. It does the same job as a Miniram. The only differance is the alleged shorter ports of the MR.
Oh, and one more major differance, the LT1 intake is half the price!
So to sum up your half assed statement, anything that is half price is 'cheap crap like' right?

 

If you are telling someone that they "will not perform the same" but don't have proof then you should at least elaborate as to why you "believe" they will not perform the same.
State factual differences between the two and your views on how those differences will affect the performance.

Your saying that 2 different (although extremely similar) intakes do not perform the "same". Couldn't this be assumed. They are after all not identical.

 

There are 3 things wrong with 90° coolant fittings. First you can't use them in the front because it's too close to the side of the intake. Second, they are even taller then the shorty 3/4" ones I use. Lastly they neck down at the curve reducing the inside diameter even more which I don't like.

 

how about take the intake to a welder and have them TIG in a bent aluminum tube of your choice so it sits perfectly where you need it with the right angle and no restriction?
just throwing out suggestions because a coolant passage seems to trivial to me to cause a major change of plans.

 

Because it's easier to just install the coolant fittings in the rear where there's no restrictions.
I do this on all my latest intakes. No-one has TB problems anymore no matter what TB you use.

 

John,
I am finishing up my first LT1 intake swap right now. I had put the coolant lines in the front because a few machine shops said the cooling would be less even if I put them in the rear.
I don't know a lot about how the cooling system works so I took their advice. Do you have any information as to how or why putting them in the rear is OK? I am just searching for info here. I looked all over the web and the forums but can't see to find any information on how putting them in the rear would affect cooling, or if it does not.
I am starting to fab another intake (alum welding & drilling) and would like to put the fittings in the rear if it is an OK thing to do. Has anyone used an infared temp. meter to measure the front and read head temp. differences with the ports in the rear of the intake?

Thanks,
J

 

keeping it fresh that was a good question

 

I have been installing the coolant fittings in the rear for 1 year now. I probably did 50 intakes last year, not one has complained about cooling issues.

I will update the cooling line picture, I missed that.

 

Is there any advantage to using an LT1 throttle body over an L98 unit?

i.e. Flow differences?

-Z

 

while you're doing that

put the price list on the main page. currently the only way to see them is to click FAQ then the link..

ive sent alot of people to your site, and 3 out of 5 ask me how much.... they just dont see the link.


while you're reading this, i have 3 questions for you.

1. i have Dart Iron eagles... are the cooling ports too big on these for the intake?

2. whats the diff between the caprice "lt1" intake and the regular LT1 intake?

3. im putting it on a 400SBC. and im paronoid about cooling.
you think theres enough metal there that i can drill the coolent nipple hole at a angle, tilted away from the TB, but not all the way thru, then drill up, and meet the 1st hole.... creating a angle?
somthing like the attached pic...
dark gray is the straight hole like now, light gray is the angle/tapped hole and nipple

 

It IS on the main page, top left in bold.


I am not absolutly sure. I know the Dart II heads have very tall coolant ports that the LT1 intake has a hard time covering without welding a little material at all 4 corners. We're not talking much, just about 1/8"-3/16" would do fine.



http://www.lt1intake.com/intakeports.htm


No way, there is just enough to drill/tap straight. If you want an angle you must weld the fitting on.
If you're serious about cooling then look into AFTERMARKET dual electric fans. Not the dual IROC fans, they suck compared to the dual Spal 11" fans. Then if you're still not satisifed with the cooling upgrade the radiator to a Griffen dual 1.25" core universal one. be aware custom upper and lower mounts will be required with the 1.25" version. You can use the stock mounts wth the dual 1" core version though.

 

i must have been to your site 40 times, and never saw that link lol.

i already won my complete LT1 intake assmbly(from TB to fuel rails to injectors) so i guess we're going to find out..... i'll post up when i see.


i already have a BeCool alum radiator, and im shopping for fans right now...

if i end up moving my alt to the smog pump location for my supercharger install, i think i may just tap the front of the head on that side... you know anyone else that has done that?

i realize its overkill, having both sides exit the rear is the same as the front, but id rather be on the thermo in 115* heat then in the red.

 

Just to clarify,
are you all saying that the TPS and IAC on the TPI and LT1 TB's are elctronically the same, just with different connectors on them?

how about the 93 LT1 and the 94-97 LT1 TB's?

 

for the late SD-TPI cars, vs the 94+ LT1 i know thats yes..

from the data i looked over, even the LS1 sensors are the same.


for the older TPI and 93 stuff, i donno.

 

if you look close enough you can see i have my coolant return lines in the rear

 

Who makes & sells that low mount alternator bracket? I had fabbed my own set-up.

 

that ones from march