Lt1 intake on 350 Tpi
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Lt1 intake on 350 Tpi
Hey guys, i was trying to find out all i needed to know on how to do this intake swap!The car is a 1989 iroc-z with a 350 tpi. I am only running 305 injectors which i believe are 19#? so if i get the lt1 intake, from a pick-n-pull i will grab the whole assembly as well. Such as injectors, fuel rail, everything needed!
Will this intake bolt right on? I will just be installing this intake and nothing else, no Heads or cam (for now). Im going to have to make a dizzy hole right?
Just basically i would like to know as much as possible about doing this swap!
Thanks!
Will this intake bolt right on? I will just be installing this intake and nothing else, no Heads or cam (for now). Im going to have to make a dizzy hole right?
Just basically i would like to know as much as possible about doing this swap!
Thanks!
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Car: 89 iroc-z
Engine: 305tpi
Transmission: wc-t5
Axle/Gears: 10 bolt 3.08 posi (4 now)
Re: Lt1 intake on 350 Tpi
no it doesnt just bolt on...... the ports will need to be raised by welding material to the top of the runner exits. or a high temprature epoxy.
also you will need to have a remote thermostat housing.
the hole for the dizzy sits at a slight angle as well btw.... something to keep in mind, its not just an easy (cut the hole and your done) hence why im not currently using 1 lol......
use your search feature and you will find out more than you need to know about the swap.
also you will need to have a remote thermostat housing.
the hole for the dizzy sits at a slight angle as well btw.... something to keep in mind, its not just an easy (cut the hole and your done) hence why im not currently using 1 lol......
use your search feature and you will find out more than you need to know about the swap.
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
i have tried to use my "search feature" and every time i find something about this, i find an old posting from years ago and they all say to go to lt1intake.com which is a no longer available website!
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
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Axle/Gears: QP 9" 3.73
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
Thanks a lot vetteoz! Those seem like very good sources, i would have never found those!
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
Even after looking at those websites, it doesnt really tell me "how" to do it.
The only real thing that i know about this swap is that you will need to make a dizzy hole. But what happens to the thermostat? I hear about these Remote thermostats but i cant figure out what they are and how they work! Where is this thing mounted??
Thanks
The only real thing that i know about this swap is that you will need to make a dizzy hole. But what happens to the thermostat? I hear about these Remote thermostats but i cant figure out what they are and how they work! Where is this thing mounted??
Thanks
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Lt1 intake on 350 Tpi
Problem #3,
No front coolant passages to return to the radiator. I just drilled and tapped two 3/4" heater nipples vertically where the coolant would normally exit the head. I will run 3/4" heater hose to a remote thermostat housing I found on-line. it will be mounted on the fender well. It will use the same outlet neck and return to the radiator as it should.
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Lt1 intake on 350 Tpi
As stated in the links you drill and tap the manifold for 2 pipe fittings.You then run 2 heaters hose to a remote thermo housing like this
http://www.streetperformance.com/par...8-7134win.html
which houses the thermostat and allows you to join to the radiator hose .You mount the housing anywhere you like out the front where it is easy to hook up the radiator hose
http://www.streetperformance.com/par...8-7134win.html
which houses the thermostat and allows you to join to the radiator hose .You mount the housing anywhere you like out the front where it is easy to hook up the radiator hose
Last edited by vetteoz; 11-08-2009 at 05:37 AM.
#10
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Re: Lt1 intake on 350 Tpi
Originally Posted by Grants89iroc-z
Even after looking at those websites, it doesnt really tell me "how" to do it. The only real thing that i know about this swap is that you will need to make a dizzy hole. But what happens to the thermostat? I hear about these Remote thermostats but i cant figure out what they are and how they work! Where is this thing mounted?? Thanks....
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
okay so you can run egr on this intake, which is what im going to have to do.
So i understand the part about drilling my own holes to bolt the intake on, got that.
Weld in dizzy hole from a donor tpi intake.
Make your own coolant passage so it can return to radiator.
install the egr on back on intake
That should be it right? it should work after that?
So i understand the part about drilling my own holes to bolt the intake on, got that.
Weld in dizzy hole from a donor tpi intake.
Make your own coolant passage so it can return to radiator.
install the egr on back on intake
That should be it right? it should work after that?
Last edited by Grants89iroc-z; 11-08-2009 at 12:57 PM.
#12
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Re: Lt1 intake on 350 Tpi
Originally Posted by Grants89iroc-z
Sooo..can you run egr on this intake?
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
so your saying that if i put the egr from my tpi intake, and put it on the lt1 intake, it will leak??
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Re: Lt1 intake on 350 Tpi
Originally Posted by Grants89iroc-z
so your saying that if i put the egr from my tpi intake, and put it on the lt1 intake, it will leak??
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
Okay! im starting to get this now..So i just put a block off plate on the back of the intake. Since i cant use my EGR valve there becuase it will hit the distributor.
So if you cant mount the egr on the intake, Where do you put it??
So if you cant mount the egr on the intake, Where do you put it??
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Re: Lt1 intake on 350 Tpi
Originally Posted by Grants89iroc-z
Okay! im starting to get this now..So i just put a block off plate on the back of the intake. Since i cant use my EGR valve there becuase it will hit the distributor. So if you cant mount the egr on the intake, Where do you put it??
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
What would happen if i did NOT disable it from the prom, and still blocked off the EGR?
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Re: Lt1 intake on 350 Tpi
Originally Posted by Grants89iroc-z
What would happen if i did NOT disable it from the prom, and still blocked off the EGR?
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
well it would seem a lot easier to not go into the prom, since i dont have any computer programs to change prom settings
But there wouldnt be any damages if i didnt change the prom right?
like im not going to ruin my engine because i was lazy am i?
But there wouldnt be any damages if i didnt change the prom right?
like im not going to ruin my engine because i was lazy am i?
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Re: Lt1 intake on 350 Tpi
Originally Posted by Grants89iroc-z
well it would seem a lot easier to not go into the prom, since i dont have any computer programs to change prom settings But there wouldnt be any damages if i didnt change the prom right? like im not going to ruin my engine because i was lazy am i?
.... just kidding.
You'll be fine, you can always have someone burn a chip for you....
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
lol yeahh, Thanks for answering all my questions lol.
Maybe later in the future this will be a project for me but if i do any intake work, ill probably just be porting my intake for now! But first..i gotta fix my car first
Maybe later in the future this will be a project for me but if i do any intake work, ill probably just be porting my intake for now! But first..i gotta fix my car first
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Re: Lt1 intake on 350 Tpi
Or you can buy them on ebay with the dizzy hole drilled, and and manifold bolts redone for like $150 I think.
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
i looked on ebay and cant find any custom lt1 intake for the 1st gen engines.
It would be great just to buy an intake that had all the work done to it, like the bolt holes in the right spot, basically where i can just bolt it onto my engine.
If anyone is selling an lt1 intake thats modified i might be interested in buying!
It would be great just to buy an intake that had all the work done to it, like the bolt holes in the right spot, basically where i can just bolt it onto my engine.
If anyone is selling an lt1 intake thats modified i might be interested in buying!
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Re: Lt1 intake on 350 Tpi
Was intending doing major mods on mine requiring welding but machinist thought the intake would warp.
Machined off all EGR bosses so HEI would fit , was going to plate over holes and and weld a alum block for dist hole / mount and have machined to correct angle so as not to have the oil leak potential with the angled spacer most use
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
Would there be any power gains by just doing this intake swap and nothing else??
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Re: Lt1 intake on 350 Tpi
Would there be any power gains by just doing this intake swap and nothing else??
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
yeah i did hear that you lose the low end torque, and get more high end power.
But it is probably better since when you wanna haul *** your revs are high ya know? and tpi doesnt make power up in the higher rpms! So the lt1 intake probably pulls a lot more in the higher in the rpms than the tpi ever would.
But what i was really tryin to figure out is like, what would the time difference be in say 0-60 or 1/4 between the two intakes?
Same times? just different mph?
But it is probably better since when you wanna haul *** your revs are high ya know? and tpi doesnt make power up in the higher rpms! So the lt1 intake probably pulls a lot more in the higher in the rpms than the tpi ever would.
But what i was really tryin to figure out is like, what would the time difference be in say 0-60 or 1/4 between the two intakes?
Same times? just different mph?
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Re: Lt1 intake on 350 Tpi
Id like to know too but it's difficult to find actual posted results from a lot of mods here. Hopefully someone who's done it can chime in with some details of their experience.
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Re: Lt1 intake on 350 Tpi
My questions is about the fuel pressure regulator. The TPI regulator sits under the old plenum cause it's raised. My question is if this new LT1 intake sits flush, how are you going to mount the fuel pressure regulator? Does it need to be mounted somewhere else in the engine, then have fuel lines run to the fuel rails?
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Re: Lt1 intake on 350 Tpi
http://cgi.ebay.com/ebaymotors/LT1-L...item439afa090e
You either attach your new custom lines to the existing LT1 rails or you weld -AN fittings on the rails and use a remote reg
Last edited by vetteoz; 11-09-2009 at 04:52 PM.
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Re: Lt1 intake on 350 Tpi
Yeah I was thinking that. Was there someplace that you can buy this already modded. And with the new upper intake, do you need a new base? Or can you use the old tpi base?
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Re: Lt1 intake on 350 Tpi
So you can simply just buy the lt1 intake manifold, and do all the mods, then jar take off your runners, plenum, and lower intake and slap on that lt1 and your good to go?
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Re: Lt1 intake on 350 Tpi
So you can simply just buy the lt1 intake manifold, and do all the mods, then just take off your runners, plenum, and lower intake and slap on that lt1 and your good to go?
#36
Re: Lt1 intake on 350 Tpi
I guess you can,but the mods usually take anyone 2 to 8 hours to complete. I just don't have the time to do it myself. I'd rather buy it already done from someone who has done it a few times.
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
if i had welding tools and an lt1 intake i would do this for sure! but i dont have welding tools lol, so i wanted to buy one madee
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Re: Lt1 intake on 350 Tpi
Now my next question is if you swap to the LT1 intake, do you need to swap to vortec style heads? I know that heads would also not be a bad idea to do at the same time but would the bolt patter on your stock L98 heads match up?
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Car: 1989 Chevrolet Camaro iroc-z
Engine: 350 Tpi
Transmission: t5 Tranny
Axle/Gears: 3.08
Re: Lt1 intake on 350 Tpi
i found this from another website
"From LT1intake.com:
Will the LT1 intake fit Vortec heads?
No, it will not fit. The intake mating flange is too narrow to cover the tall ports that the Vortec head uses. Fastburn heads are drilled with both standard SBC and Vortec bolt patterns."
"From LT1intake.com:
Will the LT1 intake fit Vortec heads?
No, it will not fit. The intake mating flange is too narrow to cover the tall ports that the Vortec head uses. Fastburn heads are drilled with both standard SBC and Vortec bolt patterns."
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Re: Lt1 intake on 350 Tpi
Are there any updates on this setup? I'm now getting all the parts together for the swap on my 89 Vette and I'm having problems with the intake gasket. I was told that the Fel-Pro 1205 works, but it has some "issues" on sealing to the rear of the manifold where the "new" water outlet nipples go. As soon as I can get the gasket thing taken care of, I'm hoping to get it installed, but for now I'm getting data on the "before" drag strip times so I can see what this "manifold only" change offers.
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