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Discussion Starter · #21 ·
I always loved the look of the TPI intake. They are great for low rpm torque but fall short once the revs build.
That new system should work great and probably improve top end power.
Fred has a lot of great info and ideas.
I'll be selling that pretty tpi system with the ECM as soon as I get it pulled. Maybe I'll recoup a buck or two.
 

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I always loved the look of the TPI intake. They are great for low rpm torque but fall short once the revs build.
That new system should work great and probably improve top end power.
Fred has a lot of great info and ideas.
dual plane will make more low end torque than TPI. TPI shines in the 3000-3500 range.

there is no such thing as a 4L65. it's an internet myth that 5 pinion planets are stronger than 4 pinions. They are actually weaker and if they are non-gm 5 pinions they are total garbage. Not saying that GM 5 pinion are bad, but they are nothing special and I wouldn't waste money on them. The OE high energy band is superior to any kevlar band, more marketing "hype".
 

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Discussion Starter · #23 ·
dual plane will make more low end torque than TPI. TPI shines in the 3000-3500 range.

there is no such thing as a 4L65. it's an internet myth that 5 pinion planets are stronger than 4 pinions. They are actually weaker and if they are non-gm 5 pinions they are total garbage. Not saying that GM 5 pinion are bad, but they are nothing special and I wouldn't waste money on them. The OE high energy band is superior to any kevlar band, more marketing "hype".
Well it seems that I'm an unfortunate victim of all that "hype" considering that's the hand(and trans) that I've been dealt. Thank you for pointing out a potential weak spot in my drivetrain though. Il be sure to pay special attention to it from here on out.
 

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Where are you going to put the filters? If you are using two sides, 3 inch should be sufficient for intake tubes. The fewer/shallower elbows you have for the intake tubes the better. You might be able to put them under the front of the hood, and have louvers or NACA scoops on the hood (like an old Mustang). You need some kind of tray under the scoop to keep water off of everything.

If you use the skinny hat, you may be able to use a single plane intake manifold if it is not too tall. That would give you more top end performance, but the bottom end will suffer. If you go to a single plane intake manifold, you may need a higher RPM stall speed converter.
 

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Discussion Starter · #25 ·
Where are you going to put the filters? If you are using two sides, 3 inch should be sufficient for intake tubes. The fewer/shallower elbows you have for the intake tubes the better. You might be able to put them under the front of the hood, and have louvers or NACA scoops on the hood (like an old Mustang). You need some kind of tray under the scoop to keep water off of everything.

If you use the skinny hat, you may be able to use a single plane intake manifold if it is not too tall. That would give you more top end performance, but the bottom end will suffer. If you go to a single plane intake manifold, you may need a higher RPM stall speed converter.
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Hood scoop from a mini cooper. I definitely need to work out a drainage system.
 

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Also, I already have the dual plane intake manifold. Weiand Speed Warrior air gap.
I know that from a previous post. It was just an option I thought of. I wanted to inform the poster who added a comment before mine as to what will increase the higher RPM range HP. A dual plane manifold is good for low end torque, but not high end HP.
 
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@Shammoosnewdriver If you don't mind me asking, why are you getting rid of the TPI system? I have one going in my 91 wagon, so I'm curious why you're swapping it out.
 

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Discussion Starter · #29 ·
@Shammoosnewdriver If you don't mind me asking, why are you getting rid of the TPI system? I have one going in my 91 wagon, so I'm curious why you're swapping it out.
There's a built 406 in the car now not the factory motor. The ECM is from 1915 and is programmed with smoke signals and tribal herbs. I wanted something from this century that had a bit more tuneability and would make more power. From what I've heard the tpi setup won't do much more than 400 hp. I'm not sure where the previous owner got these numbers but I don't want to leave myself short at the end of the day
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Ok, that makes sense for sure. The long runners on a stock TPI do tend to restrict high end hp. I'm replacing with my factory TBI 305 with a TPI 350, I'm planning on using a much more modern EFI setup with a 411 PCM, though your new EFI looks much simpler lol. I'm only looking for around 300hp though, so the TPI should work for me.

there is no such thing as a 4L65
Sorry, but I do believe you're misinformed here?
The 4L65E is definitely a real GM transmission, came in vehicles like the 04'-06' GTO, and the 05' Vette. 4L65E Transmission Specs and Updates - Gearstar
it's an internet myth that 5 pinion planets are stronger than 4 pinions. They are actually weaker and if they are non-gm 5 pinions they are total garbage.
I can't speak for GM vs aftermarket trans parts, but a 5 pinion planetary should be capable of taking 25% more power, if all else is equal (material alloys, design, ect.) I have my doubts that a 5 pinion planetary would be weaker than a 4 pinion, outside of weaker material choices.
 
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Ok, that makes sense for sure. The long runners on a stock TPI do tend to restrict high end hp. I'm replacing with my factory TBI 305 with a TPI 350, I'm planning on using a much more modern EFI setup with a 411 PCM, though your new EFI looks much simpler lol. I'm only looking for around 300hp though, so the TPI should work for me.


Sorry, but I do believe you're misinformed here?
The 4L65E is definitely a real GM transmission, came in vehicles like the 04'-06' GTO, and the 05' Vette. 4L65E Transmission Specs and Updates - Gearstar

I can't speak for GM vs aftermarket trans parts, but a 5 pinion planetary should be capable of taking 25% more power, if all else is equal (material alloys, design, ect.) I have my doubts that a 5 pinion planetary would be weaker than a 4 pinion, outside of weaker material choices.
He has a 4L60 aka 700R4. Someone has thrown some 4L65E parts in and called it a 4L65. Notice there is no "E" on the end of what i wrote. Material is not equal (powder metal on the 5 pinions). like I said the OEM 5 pinions are fine if you have them but they are NOT an upgrade over the 4 pinion. absolutely stay away from after market 5 pinions.
 

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The filter, being you have an opening in the hood , could you not build a tray under a great big " conventional" round drop filter that seals to a matching panel in the hood ?
That or panel filters in the hood that seal down o a throttle body tray.
 

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Discussion Starter · #34 ·
He has a 4L60 aka 700R4. Someone has thrown some 4L65E parts in and called it a 4L65. Notice there is no "E" on the end of what i wrote. Material is not equal (powder metal on the 5 pinions). like I said the OEM 5 pinions are fine if you have them but they are NOT an upgrade over the 4 pinion. absolutely stay away from after market 5 pinions.
It's an upgraded 4l65e as far as I know. I will verify that asap. This car has been around for quite some time so there might be people that know things that I don't. Any constructive info is greatly appreciated.
 

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As noted your car was the non electronic trans and the previous owner put 5 pinion parts in it .
That making it a NON E 4l65.
Not an actual production part.
Did the original owner mention on going issues with that engine?
A deep dive on old threads might be a help to you.
 

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Discussion Starter · #36 ·
As noted your car was the non electronic trans and the previous owner put 5 pinion parts in it .
That making it a NON E 40l65.
Not an actual production part.
Did the original owner mention on going issues with that engine?
A deep dive on old threads might be a help to you.
Oh yeah. I have them pinned on my home screen. I'm still in touch with him. He just now responded and said that it was originally a 4l60 out of a 93 occ. The main reason for the efi upgrade is the amount of grief he went through over the years. I want to actually drive the car not just throw money at it.
 

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I would suggest you make a project car build thread for this. It'll keep all of your content in one place, and if you ever need to sell it, provides a great spot to point people to documentation.

Don't worry about the transmission for now. Get it running, make sure the shifts are crisp but smooth, and you'll be fine. Eventually I would get a line pressure gauge and monitor for fluctuations in line pressure which will quietly kill your trans before you feel it.
 

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Discussion Starter · #38 ·
I would suggest you make a project car build thread for this. It'll keep all of your content in one place, and if you ever need to sell it, provides a great spot to point people to documentation.

Don't worry about the transmission for now. Get it running, make sure the shifts are crisp but smooth, and you'll be fine. Eventually I would get a line pressure gauge and monitor for fluctuations in line pressure which will quietly kill your trans before you feel it.
Excellent suggestion. Thank you for the trans info also!
 

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Oh yeah. I have them pinned on my home screen. I'm still in touch with him. He just now responded and said that it was originally a 4l60 out of a 93 occ. The main reason for the efi upgrade is the amount of grief he went through over the years. I want to actually drive the car not just throw money at it.
They did not make an OCC in 93.
 
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