TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Please i need to know how much hp i will get out of my tbi with these mods.

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Old Feb 28, 2003 | 10:03 PM
  #1  
tbfirebird's Avatar
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From: waukesha,WI
Car: Black 89 Formula
Engine: ??????????
Transmission: ??????????
Please i need to know how much hp i will get out of my tbi with these mods.

Okay i plan on putting all theses mods on in summer so could you tell me how much YOU think i would get out of each,okay heres the list its kind of long.


1.Injector spacer
2.Throttle Body spacer
3.K&N X stream Lid
4.K&N 14x3 Open element
5.Edelbrock TBI manifold
6.Worlds S/R Toruer 305 (Jegs Item #955-042650)
7.Crane Power max (summit item #CRN-114122 1,500-4,500rpm
8.MSD Blaster coil
9.Edelbrock T.E.S headers 1 5/8 3inch cat
10.Flowmaster muffler 80 Series
11.Complete 3 inch exhaust
12.March under drive aluminum pulley 3 set
13.aluminum Drive shaft
14.Holley 670 cfm 2-BBL 89 5.0L
15.ram air box dual in take



Heres the list im hoping for more than 300 horspower.
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Old Feb 28, 2003 | 11:00 PM
  #2  
vjo90RS8's Avatar
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From: San Jose, CA
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
i would do an LT1 cam, you can pick up a used one for around 30-50 shipped

I ran a best of 15.294 with the mods in my sig, next i plan on doing an exhaust cutout (maybe), a 1/2" TBI spacer and, some timing and fuel pressure tuning. I also plan to run no air filter at the track with my ghetto cold air and remove my endlinks, i might even take out my back seats and passenger seat, i want to hit 14.9s. Ill have more track time March 26th.

You will probably be in the mid to high 13s with some gears and posi, and youll definately need some performance suspension parts if you plan on gettin that thing down the track.

And, how many miles do u have on your car?
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Old Mar 1, 2003 | 09:02 AM
  #3  
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From: waukesha,WI
Car: Black 89 Formula
Engine: ??????????
Transmission: ??????????
114,998


so how much horsepower do you think i might get?
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Old Mar 1, 2003 | 02:28 PM
  #4  
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From: 600 yds out
Car: Bee-Bowdy
Engine: blowd tree-fity
Transmission: sebin hunnerd
Axle/Gears: fo-tins
I got 313 hp @ 5000 rpm and 382 ft-lbs @ 3500 rpm in DTD.

I had to guess the intake lobe center tho...
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Old Mar 2, 2003 | 02:41 PM
  #5  
NJ SPEEDER's Avatar
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From: Ewing, NJ
skip the spacers if you are gonna do the holley tb. i can't say i have seen any actual evidence of spacers beign much help anyway, at least not to match their price.
i would chose an LT1 cam over that cam based on price and rpm rage.
torquers are very good heads for the price, good pick.
you will want to take the edelbrock intake to a shop and have the bores opened up to match teh holly tb.
if you are gonna get a holley tb, get teh 350 injectors, the 305 ones are not enough to get the job done easily once you add cam and heads.
i never noticed any gain from teh pulley s when they were on my car. nothign at the track or on the street really form them.
the drive shaft is a godd idea, a lot fo guys over look chassis and drive train when chosing mods.

once everythign is tuned in i woudl say you coiudl easily come up with 275+ to teh wheels, that is after you get it all tuned in with a proper chip and everything.

later
tim
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Old Mar 3, 2003 | 03:48 PM
  #6  
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From: "When the going gets weird, the weird turn pro." -RIPHST
Car: 1991 RS
Engine: 383TBI Fastburns and 2"TB
Transmission: T56 held up by Spohnstuff
If you have all the specs, you should consider getting a desktop dyno program. Then you could make more accurate and controlled predictions of the power your selected items would produce.

People on this board do have huge amounts of experience, that is for sure. But for a reasonably accurate estimate, you'd need to find someone with essentially all the same mods you suggest and has dyno results to prove it.

Am not knocking anyones expertise- there is a ton of excellent info and people on these boards. But for truly accurate and relevant info, I'd go with the dyno program. This will also allow you make substitutions (cam for instance) and then see what changes result.

If you're going with the under drive pulley, should probably pick up a new altenator.
I'm hearing that the under drives place additional strain on the altenator and it usually fries them.
Search "March Underdrive".

Anywho-
Best of luck

S-D
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Old Mar 4, 2003 | 06:21 PM
  #7  
tbfirebird's Avatar
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From: waukesha,WI
Car: Black 89 Formula
Engine: ??????????
Transmission: ??????????
is there any other bolt on heads that will give me more horse power?
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Old Mar 4, 2003 | 08:17 PM
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vjo90RS8's Avatar
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From: San Jose, CA
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
do a search man, everything you will ever want to know about a thirdgen is on this board. Do a lot of research before you decide exactly what you want to do to your car. The engine is not the only thing to mod out, you going to have to mod your transmission, suspension, and rear end to make all that power even worth it.
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Old Mar 6, 2003 | 12:16 PM
  #9  
BahamutRS's Avatar
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From: Parlin, NJ
Let's put it this way: you better get some gears, a torque converter, and a posi along with all that...because if you spend that money and can't run low 14s...then it's time to sell.
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