tbi headers long tube on a vortec

[f350_6x6]

Will the long tube headers from a say 95 model tbi 5.7 fit a 98 vortec 5.7 understanding that will need to weld on a egr tube and relocated the o2 sensors. reason I ask is a set for 4x4 on the 95 is $155 compared to over $400 for the vortec.

Thanks
Mac

[mud_slinger]

i would like to know too

[GreaseDog]

yes, you should be able to do that no problem. exhaust from there back will have to be fabricated, which shouldnt be an issue since the stock heapipes are crap anyways.

[f350_6x6]

Thank you for the reply, I just didn't want to drop the money on something that would be useless to me.

Thanks
Mac

[SuperChevy17]

I bought headers for my 95 and did a test fit to the 98 vortec engine I'm putting in it. Everything looked fine. I think those vortec headers assume you are keeping all of your original egr and O2 crap. That's why they cost more.

[f350_6x6]

thank, that's what i like to hear. since i ordered a set this morning...LOL

Thanks
Mac

[SuperChevy17]

Where is Justin, TX??

[f350_6x6]

North of Fort Worth, south of Denton Very close to Texas Motor Speedway.

[SuperChevy17]

Oh ok. That's cool. I've been to Forth Worth a couple times.

[f350_6x6]

Set a email to Hedman, this is there reply.
Hello:

Yes, the 69440 will for the truck, but your Vortec heads prefer d port hedders, and that hedder is not available in d port.

Thank you,

Hedman

[ZZ4Blazer]

The 96+ headers have an exhuast port on them since the vortec motors use an EGR fitting on the stock manifolds.

Without it hooked up, youll probably throw a code. Id think it would need unplugged too or youd have an exhuast leak when it opened. Id recommend having it deleted via a computer tune.

[96chevy15004x4]

Can you put the egr sensors from the 96+ manifolds in the headers for a 95? id like to put headers on my 96 too, and would love to buy the cheap 88-95 ones if i could.

also, if i put headers on and didnt hook up the sensors, would the motor still run good or not?

[f350_6x6]

I have shorty's on it now, If all goes properly I will try to install the tbi's on mine first of the year. re weld the EGR port to the new headers from the shorties. But with the holidays and kids, no play money at this time.

[Fast305]

North of Fort Worth, south of Denton Very close to Texas Motor Speedway.

Yep, I drive right by there on my way from Grapevine to Bridgeport on 114.

TBI headers will fit fine with Vortec heads. You just need to add bungs in the header collectors for the pre-cat 02 sensors. I would replace the cats with some high flow aftermarket units. Finally the EGR fitting can be bought and added to keep you smog compliant.

[97whitez-71]

Yep, I drive right by there on my way from Grapevine to Bridgeport on 114.

TBI headers will fit fine with Vortec heads. You just need to add bungs in the header collectors for the pre-cat 02 sensors. I would replace the cats with some high flow aftermarket units. Finally the EGR fitting can be bought and added to keep you smog compliant.

yea i was just about to add this. The TBI headers only have a pre cat o2 in one of the headers where a vortec needs a precat o2 in each header. I'm not sure if the o2 sensors are the same style or not. I've got a set of hookers sittin in my garage that I at least need one bung welded into.

[Manbearpig]

So TBI headers will work fine for me since Im blocking my EGR and have no 02 sensor bull****? :D


Pacesetter longtubes for vortecs are to ****ing expensive.

[speedracer326]

Think of O2 sensors less like emissions bull**** (evil) and more like a fuel economy item. I'm getting longtubes in a couple days and have bungs in hand (1 for stock O2, 1 for WB :rocking: ).

[ZZ4Blazer]

The TBI headers should include O2 sensor bungs in them. Just not the EGR fittings.

[97whitez-71]

The TBI headers should include O2 sensor bungs in them. Just not the EGR fittings.

They only have them in one side. Not in both. I have a set in the box in my garage right now. They will need one o2 sensor welded in the other header to work on a vortec motor.

[Pauly]

They only have them in one side. Not in both. I have a set in the box in my garage right now. They will need one o2 sensor welded in the other header to work on a vortec motor.
Yup, he's right, teh TBI headers willonly have a single O2 sensor bung and its not in the correct Vortec position.

I always thought you could use the TBI O2 sensor bung as an EGR feed, then install 2 other O2 sensor bungs in the collectors.

I have been running the 2462 1hkr TBI headers on my Vortec 350 for 8 years now.

peace
PAuly

[97whitez-71]

Yup, he's right, teh TBI headers willonly have a single O2 sensor bung and its not in the correct Vortec position.

I always thought you could use the TBI O2 sensor bung as an EGR feed, then install 2 other O2 sensor bungs in the collectors.

I have been running the 2462 1hkr TBI headers on my Vortec 350 for 8 years now.

peace
PAuly

so if i had two sensor bungs welded in for the vortec sensors what should i do with the spot for the tbi sensor

[speedracer326]

Plug it.

[GreaseDog]

Think of O2 sensors less like emissions bull**** (evil) and more like a fuel economy item. I'm getting longtubes in a couple days and have bungs in hand (1 for stock O2, 1 for WB :rocking: ).
its not a "fuel economy item" its a make your truck get the right amount of fuel to run properly item. get yourself another o2 bung for the wideband, and leave 2 o2 sensors in place, one for each bank. a wideband in each bank may be beneficial if your controller can handle it, at which point, you'll need 2 more bungs.

[speedracer326]

Without the O2 sensors it'll just run off the map with no correction which typically is fatter than 14.7:1 which is where your fuel mileage goes. When trying to get an aftermarket sensor to work in my Trueno (on my first failed attempt) my AFR's went from stoich to 12.5:1 cruising. Car ran fine, just drank more gas. Here's where I got my bungs: http://www.xenocron.com/catalog/steel-bung-and-plug-set-p-139.html

[SuperChevy17]

Try these. Bungs already welded in place.

http://www.jegs.com/p/JEGS/751310/10002/-1

I'm going to try them.

[97whitez-71]

Already had my exhaust guy pop one in the headers.

[JCribb]

is it possible to get an extention tube for EGR to connect to TBI O2 port?

[speedracer326]

Yeah, you can fab up pretty much anything if you want to keep that abomination of an EGR system. It's just plumbing.

[JCribb]

Yeah, you can fab up pretty much anything if you want to keep that abomination of an EGR system. It's just plumbing.

I was only asking due to my inexpirience of blocking emissions crap off. My "project" in question was purchased w/o cats....and they're not gonna be any returning. The beauty of it being tagged in Oklahoma...no emissions.

What would need to be purchased to block off the EGR from motor?

I have read in here that you can have the custom tune "delete" it. I will have the rear o2's deleted as well.

I'm really kinda ignorant to the emissions side of life on these trucks. (no expirience)

I know what the EGR does, but does it really affect gas mileage?

Thanks,
Jeremy

[97whitez-71]

I was only asking due to my inexpirience of blocking emissions crap off. My "project" in question was purchased w/o cats....and they're not gonna be any returning. The beauty of it being tagged in Oklahoma...no emissions.

What would need to be purchased to block off the EGR from motor?

I have read in here that you can have the custom tune "delete" it. I will have the rear o2's deleted as well.

I'm really kinda ignorant to the emissions side of life on these trucks. (no expirience)

I know what the EGR does, but does it really affect gas mileage?

Thanks,
Jeremy

the motor side just needs to be plugged. and yes you can delete the egr and rear O2s

I just did this last night so I can say first hand whats gonna work now

[JCribb]

the motor side just needs to be plugged. and yes you can delete the egr and rear O2s

I just did this last night so I can say first hand whats gonna work now

So just a general EGR block off plate http://www.jegs.com/i/Trans+Dapt/969/2056/10002/-1 like this?

Found O2 plug, that was easy. Again does EGR have anything to do with fuel economy? I know it recirculates exhaust gases back into intake for cleaner burn.

I'm on a quest of trying to knock down 21-22 MPG with my 305 5 speed. I got 19.5 prior to head taking a dump on me.

[Pauly]

so if i had two sensor bungs welded in for the vortec sensors what should i do with the spot for the tbi sensor
It comes from Hooker with teh bung welded on but the tubing has NOT been drilled out. You wont HAVE to do anything.

peace
PAuly

[97whitez-71]

So just a general EGR block off plate http://www.jegs.com/i/Trans+Dapt/969/2056/10002/-1 like this?

Found O2 plug, that was easy. Again does EGR have anything to do with fuel economy? I know it recirculates exhaust gases back into intake for cleaner burn.

I'm on a quest of trying to knock down 21-22 MPG with my 305 5 speed. I got 19.5 prior to head taking a dump on me.


actually on my truck i had to cobble some stuff together and make a plug for it.

[speedracer326]

When functioning properly, the EGR is supposed to increase mileage. Mine was plugged so if anything it was only hurting performance. Add that to the fact that I hate looking at all that extra crap and I had my reasons for removing it. I used this blockoff plate (http://cgi.ebay.com/ebaymotors/CHEVY-TBI-LT1-EGR-BLOCK-OFF-PICKUP-SUBURBAN-SATURN_W0QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1 247QQcategoryZ33607QQihZ012QQitemZ220080625709QQrd Z1QQsspagenameZWD1V) on my 350 TBI. It looks a little out of place on my dirty ass engine, but then again so does the brand new alternator, longtubes, and other random crap. :aniteef:

[SuperChevy17]

Correction to the statement I made above... those header reducers with the O2 bungs pre-welded are for the 3-bolt flanged headers. Mine are ball and socket, so I won't be using those afterall. Most likely will use the hedman universal header x-tensions
http://store.summitracing.com/partdetail.asp?part=HED-18718
and a weld-in bung
http://store.summitracing.com/partdetail.asp?part=SUM-G2990