TPI AMC 360

[WillyPete]

it's a sunday morning, i'm bored, and i'm looking at chevy engines

how about you take a single plane intake manifold, block off the intake (or use it for a NOx port :cool: ), and grind away at the runners til you have a relatively open surface.

next, fab up a sheetmetal intake, then weld it to the stock intake, and slap a holley projection or a TBI fuel injector on the front.

voila, instant AMC TPI, or am i horribly mistaken?

http://kahuna.sdsu.edu/~darling/images/ram502.gif

that's a ramjet 502, but same principle i think

[Dive 30]

one of the guys on here was having wedge shaped adapters custom machined to fit the 5.7 TPI manifold onto the 360. The other idea I have seen is to take the Edelbrock Torker manifold, drill/machine the runners for the injectors, build your own fuel rail, and add on a hollowed out TBI unit to use as a throttle body (or maybe adapt a TPI one?). Would be sweet but $$.

Phil

[Stolen76]

or you could just buy the TPI setup complete from TPIGUY and be done with it

[WillyPete]

<blockquote>quote:</font><hr>Originally posted by Dive 30:
The other idea I have seen is to take the Edelbrock Torker manifold, drill/machine the runners for the injectors, build your own fuel rail, and add on a hollowed out TBI unit to use as a throttle body (or maybe adapt a TPI one?). Would be sweet but $$.

Phil<hr></blockquote>

that's a really slick idea...MPI :cool:

those adapters have got to be mucho denero

i was lookin at a 94 wrangler 4 banger the other day... and the intake looks like what you just described. just had a fuel rail that tapped into the intake, with a throttle body where the carb normally goes.

the amc 150 even has the exhaust and intake ports on both sides of the head. is that normal? probly heats up the charge pretty bad.

[Dive 30]

I don't think it's an AMC design. Originally the 4 bangers were the infamous 2.8L chevys that everyone avoids like the plague. I don't know what the current 4 cylinder is, but it's probably all Chrysler, so I wouldn't be surprised to see a heated intake on it.

Stolen . . TPIguy sells Throttle Body (TBI) Fuel injection, we are talking about adapting Tuned Port Injection or Multi-Port Injection, big difference in overall efficiency. :D :D More Power!!

I don't know though . . . I'm thinking that ramjet 502 would look sweet under the hood, especially with a supercharger and nitrous . . . can a G-wag hold together for sub 12 second runs? Could you imagine the FSJ cockpit, all caged out, air shifter . . . no rock on the trail would beat you down the mountain.

[TPIGUY]

Phil,

I beg your pardon. Have you not seen this:

www.customefis.com/amcport.html (http://www.customefis.com/amcport.html)

I build these also.

TPIGUY
www.customefis.com (http://www.customefis.com)

[Dive 30]

daaayumm . . . when did you start making those? I thought I had checked your sight recently. I must have missed it. That is some seriously awesome work. How did you make the throttle body?
What type of air cleaner have you mounted to it? That would be perfect for installing a snorkel. One more thing for the wish list.


I'm gonna go wipe the drool from my keyboad now.

Thanks for correcting me!!

Phil

[WillyPete]

mmfmmhmmmuumhrm

*removes foot from mouth*

well, i'm just going to shut up now redface.gif

sorry tpiguy, didn't know you were makin those

about the 150 4 banger, it's an AMC engine. it replaced the iron duke clone that was being used in the CJs as of 1984 (i think it was TBI back then) eventually it progressed to MPI, which is what's on this 94 wrangler i was lookin at.

[TPIGUY]

Phil,

I've been building those since day one two years ago. Its just that I don't sell many because the price is too high for most people and its a lot easier to build TBI kits.

I have found that for a stock AMC 360 that TBI is fine and that the port EFI is overkill as far as economy. Actually, your mileage will go down with port EFI because the throttle response is so good that you stick your foot into it a lot more and use more gas.

TPIGUY

[WillyPete]

TPIguy:

is there any horsepower limit because of injector size on the TBI kit?

d'ya have any idea of how your TPI setup would work would aftermarket ignition modules (ala jacobs or MSD) and other aftermarket stuff like camshafts?

[Thomas DeBusk]

I'm the guy using wedge-shaped adapters to fit the Chevy 5.7 liter intake to the AMC 360 heads. The work's already done and assembled. Now, when I get some spare cash I'm not spending on my garage, I'll spring for the rest of the computer controls and drop this baby into my J10.

Thomas

[TPIGUY]

<blockquote>quote:</font><hr>Originally posted by WillyPete:
TPIguy:

is there any horsepower limit because of injector size on the TBI kit?

d'ya have any idea of how your TPI setup would work would aftermarket ignition modules (ala jacobs or MSD) and other aftermarket stuff like camshafts?<hr></blockquote>


Yes, 454 TBIs have 90 #/hr injectors which are the largest size you can get in a GM TBI. This size injector is limited to about 320 HP, unless you raise the fuel pressure over stock, which I don't like to do.

Any of my GM kits will work fine with either MSD or Jacobs. You know how you trigger an MSD or Jacobs by taking the wire from the negative side of the coil and running that into the MSD on the white wire? Well that wire comes from the ignition module and is what fires the coil (or triggers the MSD). So the wire coming from the GM computer controlled ignition module is what triggers the MSD, and also keeps the timing under control of the computer. I went into a lot of detail about this about two years ago on this forum. You can find the post in the technical section on engines.

Camshafts are a different story. I have learned through experience what to adjust for hot cams. Basically, because of reduced cylinder pressure due to overlap at low RPM, you have to raise the timing at low RPMs at all engine loads. In my truck with a 223/223 @0.050 cam and 108 LSA, I run a minimum of 20 degrees of timing at all loads, even WOT at low RPM. The truck won't run well unless I do this. This is like setting your base timing to 20 degrees. Then at idle, you take out a lot of fuel above 15 in HG vacuum, otherwise it will run too rich at idle. Finally, you add some fuel at WOT and high RPM due to the increased efficiency of the cam at those loads. Cams are the single biggest item you have to retune a chip for, followed by ported heads. I know enough to guess at a good starting point, but the chips on each system need to be fine tuned once on your vehicle, which is why I include free cables that allow you to use a laptop and scan your system.

[WillyPete]

<blockquote>quote:</font><hr>Originally posted by Thomas DeBusk:
I'm the guy using wedge-shaped adapters to fit the Chevy 5.7 liter intake to the AMC 360 heads. The work's already done and assembled. Now, when I get some spare cash I'm not spending on my garage, I'll spring for the rest of the computer controls and drop this baby into my J10.

Thomas<hr></blockquote>

ya got pics? this sounds like a really nice setup smile.gif

[Sundowner]

yeah, I I'd like to know any info you have on the wedge adapters. if you can (or want to) email me the specs on your adapters and I can work up machinist drawings and save them as .jpegs for posting.

[derf]

Originally posted by Dive 30:
I don't think it's an AMC design. Originally the 4 bangers were the infamous 2.8L chevys that everyone avoids like the plague. I don't know what the current 4 cylinder is, but it's probably all Chrysler, so I wouldn't be surprised to see a heated intake on it.The Chevy 2.8 is the V6 that was used in the XJ Cherokee from '84-'86. It only had a few HP more than the 150 ci 4 banger that was also used in that vehicle. Not only that, it had all sorts of reliability problems and was generally considered to be a bad engine.