TPI on BB
Thread Starter
Instructor
Joined: Jun 2002
Posts: 191
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From: Hillsboro OR
TPI on BB
Has anyone tried putting a late model TPI intake manifold on a early Gen IV big block? And, will it fit under a stock '73 BB hood? I'm tired of messing with my Holley throttle body and want to convert to TPI.
Thanks for any help.
Thanks for any help.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: TPI on BB (Yellow73BB)
Check out Edelbrock, they make a DPFI unit for a BB.....
it's not a tuned port thing though....I don't think you can use a TPI type unit on a BB, the ports just aren't big enough even IF you could make something up the design is not what you want....
GENE
it's not a tuned port thing though....I don't think you can use a TPI type unit on a BB, the ports just aren't big enough even IF you could make something up the design is not what you want....
GENE
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Re: TPI on BB (mrvette)
have you checked out speed and peformance http://www.hotrodlane.cc/bigblocktpi.html
http://www.arizonatpi.com/products/SuperRamBB.jpg
http://www.arizonatpi.com/products/Stealth.jpg
[Modified by patsnitrovette, 3:51 PM 5/10/2003]
http://www.arizonatpi.com/products/SuperRamBB.jpg
http://www.arizonatpi.com/products/Stealth.jpg
[Modified by patsnitrovette, 3:51 PM 5/10/2003]
Thread Starter
Instructor
Joined: Jun 2002
Posts: 191
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From: Hillsboro OR
Re: TPI on BB (Yellow73BB)
I'm hoping not to spend too much money, so Accel, Holley, etc. are out of the question. I already have a computer to drive the thing, I just need the intake manifold and injectors. That is why I am thinking about the 90's Gen V TPI system. I can probably get a manifold at a junk yard for a few hundred dollars with injectors. I just wonder if it will fit under my hood.
Melting Slicks
Joined: May 2001
Posts: 2,159
Likes: 64
From: Nichols Florida
Re: TPI on BB (Yellow73BB)
Start with something llike this:
http://www.holley.com/HiOctn/ProdLin.../9901-209.html
then use this:
http://www.bgsoflex.com/megasquirt.html
EFI setup cost is $120 or so software is free as is advice. These efi setups are being used on everything from motorcycles to rotarys.
Other bits:
http://www.holley.com/HiOctn/ProdLin...IA/FMSFIA.html
Another hint is to use the c5 filter/pressure regulator setup, this way you can avoid having to run a return line from the front of the car. It works for a Z06 should be enough for a BB.
Tyler Townsley
[Modified by Tyler Townsley, 4:56 PM 5/10/2003]
http://www.holley.com/HiOctn/ProdLin.../9901-209.html
then use this:
http://www.bgsoflex.com/megasquirt.html
EFI setup cost is $120 or so software is free as is advice. These efi setups are being used on everything from motorcycles to rotarys.
Other bits:
http://www.holley.com/HiOctn/ProdLin...IA/FMSFIA.html
Another hint is to use the c5 filter/pressure regulator setup, this way you can avoid having to run a return line from the front of the car. It works for a Z06 should be enough for a BB.
Tyler Townsley
[Modified by Tyler Townsley, 4:56 PM 5/10/2003]
Pro
Joined: Oct 2001
Posts: 621
Likes: 1
Re: TPI on BB (Yellow73BB)
Don't think there is such a thing as a factory big-block TPI. TBI, yes. There hasn't been a factory high performance big-block in many years. They are all big-torque-at-low-RPM towing beasts of burden.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
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Burning Brakes
Joined: Oct 2001
Posts: 1,146
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From: Milford NH
Re: TPI on BB (L79vette)
Don't think there is such a thing as a factory big-block TPI. TBI, yes. There hasn't been a factory high performance big-block in many years.
A big block with EFI would be awesome! :cool:
Racer
Joined: May 2001
Posts: 472
Likes: 0
From: Tampa Bay Area
Re: TPI on BB (69stingray)
The 454SS's were TBI. There is no such thing as a TPI big block as L79vette said. TPI is a very perticular system, some people use TPI to refer to all factory MPFI fuel injection. TPI was used only on 85-92 Y & F body 5.0L and 5.7L, that is it.
Josh
Josh
Pro
Joined: May 2001
Posts: 596
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From: Yardley PA
Re: TPI on BB (Tyler Townsley)
WOW. I just read the MegaSquirt description. That sounds like my kind of thing. Anybody have any experience with it?
$150 for the EFI controller. $300 for a throttle body. $400 for a machined manifold. $100 for fuel pump. And another $300 or so for injectors. Puts you at what? ~$1350. Does that sound about right? Wouldn't be a TPI, but at least and MPFI. Anf for the price of GOOD Demon carb... SOunds definitely worth considering. ZWEDE- what do you say?
Prost:cheers:
Stefan
$150 for the EFI controller. $300 for a throttle body. $400 for a machined manifold. $100 for fuel pump. And another $300 or so for injectors. Puts you at what? ~$1350. Does that sound about right? Wouldn't be a TPI, but at least and MPFI. Anf for the price of GOOD Demon carb... SOunds definitely worth considering. ZWEDE- what do you say?
Prost:cheers:
Stefan
Thread Starter
Instructor
Joined: Jun 2002
Posts: 191
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From: Hillsboro OR
Re: TPI on BB
Although it is too expensive, this is what I was thinking of. Does anyone know who makes this?
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2414531694
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2414531694
Thread Starter
Instructor
Joined: Jun 2002
Posts: 191
Likes: 0
From: Hillsboro OR
Re: TPI on BB (Tyler Townsley)
Tyler,
That megasquirt system looks cool, but it doesn't look like it controls the ignition. The computer I am using is the GM 1227747, commonly found on GM vans and pickups in the 89-92 time frame. There is lots of info on the internet on how to program this, and I actually had it working pretty well with my Holley 4 barrel throttle body until one of my injectors died. Holley doesn't make those old injectors anymore apparently, so I am looking for another solution.
The problem with most of the manifolds on the market that have injector bosses is that they are too high and won't fit under the hood of the vette.
I may just decide to weld in some bosses into my cast iron manifold, and use my Holley throttle body to let in air. Then, with my computer driving the injectors, I may be able to get there.
That megasquirt system looks cool, but it doesn't look like it controls the ignition. The computer I am using is the GM 1227747, commonly found on GM vans and pickups in the 89-92 time frame. There is lots of info on the internet on how to program this, and I actually had it working pretty well with my Holley 4 barrel throttle body until one of my injectors died. Holley doesn't make those old injectors anymore apparently, so I am looking for another solution.
The problem with most of the manifolds on the market that have injector bosses is that they are too high and won't fit under the hood of the vette.
I may just decide to weld in some bosses into my cast iron manifold, and use my Holley throttle body to let in air. Then, with my computer driving the injectors, I may be able to get there.
Racer
Joined: Oct 2002
Posts: 328
Likes: 0
From: Marlborough MA
Re: TPI on BB (Yellow73BB)
Although it is too expensive, this is what I was thinking of. Does anyone know who makes this?
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2414531694
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2414531694
I've heard the Accel unit (BBC SuperRam) has been discontinued. I've never seen the Holley version. I thought they only had a TPI style for the small block. Most common BBC stuff is TBI, or a carb-style throttle body and MPFI.
Instructor
Joined: Jul 2002
Posts: 245
Likes: 0
From: Raleigh NC
Re: TPI on BB (mean8t)
The 454SS's were TBI. There is no such thing as a TPI big block as L79vette said. TPI is a very perticular system, some people use TPI to refer to all factory MPFI fuel injection. TPI was used only on 85-92 Y & F body 5.0L and 5.7L, that is it.
Josh
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: TPI on BB (Enkil)
The 454SS's were TBI. There is no such thing as a TPI big block as L79vette said. TPI is a very perticular system, some people use TPI to refer to all factory MPFI fuel injection. TPI was used only on 85-92 Y & F body 5.0L and 5.7L, that is it.
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
Racer
Joined: May 2001
Posts: 472
Likes: 0
From: Tampa Bay Area
Re: TPI on BB (Fevre)
The 454SS's were TBI. There is no such thing as a TPI big block as L79vette said. TPI is a very perticular system, some people use TPI to refer to all factory MPFI fuel injection. TPI was used only on 85-92 Y & F body 5.0L and 5.7L, that is it.
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
When properly set up a tpi system can be an excellent choice for street use.
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
When properly set up a tpi system can be an excellent choice for street use.
Just change the runners, base, and choose the right cam and you have a killer street setup.
Pro
Joined: May 2001
Posts: 596
Likes: 0
From: Yardley PA
Re: TPI on BB (Enkil)
The 454SS's were TBI. There is no such thing as a TPI big block as L79vette said. TPI is a very perticular system, some people use TPI to refer to all factory MPFI fuel injection. TPI was used only on 85-92 Y & F body 5.0L and 5.7L, that is it.
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
Josh
Correct, and not only that, but TPI sucks. Not to offend any of the people that have done a TPI conversion, but... it's probably one of the worst forms of fuel injection. Sure, it's a great, torque-y system, but it's not the cheapest or easiest to modify, and it has a huge wall right around 4500rpm. There are FAR better fuel injection systems out there, like the MPFI's you can buy out of Jegs and such.
Please tell me if I'm wrong. Always willing to learn.
Prost:cheers:
Stefan
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: TPI on BB (Stefan69)
Stefan
I believe you are correct, the LS1 intake is a modified tpi. The tpi was really made to give torque to low end of the 5.0 since gm thought they where going to deep six the 350. But FI proved to breath new life into the 350 with increased gas mileage and lower emissions. THe LT1 was greatf or high end but lost a bit on the low end torque. The LS1 is kinda in the middle, shorter runners than the tpi for higher rpm's but longer than the LT1 for more low end torque.
And lets be honest, how often do you drive a street car above 5000 rpm's anyways? :confused: Plus the orig tpi just looks too :cool: compared to the LT1 and LS1.
[Modified by Fevre, 6:43 PM 5/12/2003]
I believe you are correct, the LS1 intake is a modified tpi. The tpi was really made to give torque to low end of the 5.0 since gm thought they where going to deep six the 350. But FI proved to breath new life into the 350 with increased gas mileage and lower emissions. THe LT1 was greatf or high end but lost a bit on the low end torque. The LS1 is kinda in the middle, shorter runners than the tpi for higher rpm's but longer than the LT1 for more low end torque.
And lets be honest, how often do you drive a street car above 5000 rpm's anyways? :confused: Plus the orig tpi just looks too :cool: compared to the LT1 and LS1.
[Modified by Fevre, 6:43 PM 5/12/2003]