94' chevy 2500 TBI Upgrade Questions

breaker187 · 09-12-2009, 09:22 AM

Alright. I used to have a 96' suburban, learned everything i could about the vortec engine and now i have a TBI. What I am wanting to do is as follows:

Rebuild bottom end to 355

Change heads to 64cc vortec heads(can i use any heads that are considered vortec heads and they still bolt up to my block?)

Change rockers to 1.6

Vortec to Tbi intake(or could i go carbed intake with a TBI adapter Plate)????

Bore intake and throttle body

Headers, y pipe, high flow catalytic converter and a muffler with a bite

Electric fans

Cam?????? Really dont know on this one, so many people have said it is so hard to get an aftermarket cam to bolt up in a tbi motor. ANy suggestions or has anyone done this successfully yet???????????

One of the main questions is my EGR vavle. I have seen where some people have totally cut the EGR off in the computer, but will that throw up codes. I need this truck to pass inspection in Texas. Can i cut it off in the computer with a custom chip or tune?

Let me know what you guys think and give me some suggestions here. I am wanting to get atleast 300hp. Would love to exceed that if possible.

gmctrucks · 09-12-2009, 10:23 AM

First of all welcome to the forum and hello fellow TEXAN. Where abouts in Texas central/coast/upper/lower/west? It is hard to find a cam for a TBI engine my buddy got one from Summit Racing also when you place those type of rockers on your heads one has to do some drilling that's all I know about that I bet some other member here can help with that.
Good luck! GMC

breaker187 · 09-12-2009, 10:38 AM

I'm in Houston. Yeah i expect to have to do some modifications with this motor. I think if i call summit they can tell me which ones will work since they deal with them all day.

dk-93silverado · 09-12-2009, 10:57 AM

Quote:

Originally Posted by breaker187

Alright. I used to have a 96' suburban, learned everything i could about the vortec engine and now i have a TBI. What I am wanting to do is as follows:

Rebuild bottom end to 355

Change heads to 64cc vortec heads(can i use any heads that are considered vortec heads and they still bolt up to my block?)

Change rockers to 1.6

Vortec to Tbi intake(or could i go carbed intake with a TBI adapter Plate)????

Bore intake and throttle body

Headers, y pipe, high flow catalytic converter and a muffler with a bite

Electric fans

Cam?????? Really dont know on this one, so many people have said it is so hard to get an aftermarket cam to bolt up in a tbi motor. ANy suggestions or has anyone done this successfully yet???????????

One of the main questions is my EGR vavle. I have seen where some people have totally cut the EGR off in the computer, but will that throw up codes. I need this truck to pass inspection in Texas. Can i cut it off in the computer with a custom chip or tune?

Let me know what you guys think and give me some suggestions here. I am wanting to get atleast 300hp. Would love to exceed that if possible.

Vortec heads bolt to your block no problem. However they have a different intake manifold bolt pattern than the TBI. I have found aftermarket intake manifolds for a vortec setup that adapt to TB or carburetor. This was aftermarket. On the camshaft, I have found several aftermarket cams for TBI. Is this TBI a hydraulic roller motor or flat tappet? My buddy has a cam that was designed to increase torque with little to no tuning for his flat tappet motor. I have a Hydraulic roller camshaft setup, I am using a cam with similar profile to that of an LT1.

breaker187 · 09-12-2009, 03:14 PM

I dont know if my motor is flat tappet or roller. It is a 94' stock TBI 5.7. I can change out to what ever i have to.

Crmzendrgone · 09-12-2009, 10:46 PM

I think most of the later 5.7s are roller. don't quote me but 90%, maybe 85% well never mind the percent I think they are.

breaker187 · 09-14-2009, 10:10 PM

If you guys want some good knowledge check out TBICHIPS.com His name is Brian and is awesome.

breaker187 · 09-14-2009, 10:10 PM

they are the L98 heads.

Wyley87 · 09-14-2009, 10:16 PM

hey breaker187 i know im not a moderator but links to other forums have to be in pm only. please remove the link

breaker187 · 09-15-2009, 08:51 PM

Sorry about that. Didnt mean to show love to another forum, this one has helped out too much with me to do that to it.

09-12-2009, 09:22 AM	#1
breaker187 Full Member Join Date: Sep 2009 Posts: 14	94' chevy 2500 TBI Upgrade Questions Alright. I used to have a 96' suburban, learned everything i could about the vortec engine and now i have a TBI. What I am wanting to do is as follows: Rebuild bottom end to 355 Change heads to 64cc vortec heads(can i use any heads that are considered vortec heads and they still bolt up to my block?) Change rockers to 1.6 Vortec to Tbi intake(or could i go carbed intake with a TBI adapter Plate)???? Bore intake and throttle body Headers, y pipe, high flow catalytic converter and a muffler with a bite Electric fans Cam?????? Really dont know on this one, so many people have said it is so hard to get an aftermarket cam to bolt up in a tbi motor. ANy suggestions or has anyone done this successfully yet??????????? One of the main questions is my EGR vavle. I have seen where some people have totally cut the EGR off in the computer, but will that throw up codes. I need this truck to pass inspection in Texas. Can i cut it off in the computer with a custom chip or tune? Let me know what you guys think and give me some suggestions here. I am wanting to get atleast 300hp. Would love to exceed that if possible.

09-12-2009, 10:46 PM	#6
Crmzendrgone Senior Member Join Date: Apr 2009 Location: Arizona Posts: 1,420	I think most of the later 5.7s are roller. don't quote me but 90%, maybe 85% well never mind the percent I think they are. __________________ ENGINES PRODUCE POWER. MOTORS RECEIVE POWER. https://lastroundbestround.com/Home_Page.html

09-14-2009, 10:10 PM	#7
breaker187 Full Member Join Date: Sep 2009 Posts: 14	If you guys want some good knowledge check out TBICHIPS.com His name is Brian and is awesome. Last edited by breaker187; 09-15-2009 at 08:52 PM. Reason: no linking related forums

09-14-2009, 10:16 PM	#9
Wyley87 Senior Member Join Date: Jul 2009 Location: Arlington, Tx Posts: 519	hey breaker187 i know im not a moderator but links to other forums have to be in pm only. please remove the link __________________ 96-GMC C1500 305ci 2WD K&N FIPK Cold Air Intake Rebuilt Motor (should have gone 350) and Trans 05 Nissan Xterra 4.0 V6 No mods so far Cost money to go fast...How fast do you wanna go?

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09-12-2009, 10:23 AM	#2
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,035	First of all welcome to the forum and hello fellow TEXAN. Where abouts in Texas central/coast/upper/lower/west? It is hard to find a cam for a TBI engine my buddy got one from Summit Racing also when you place those type of rockers on your heads one has to do some drilling that's all I know about that I bet some other member here can help with that. Good luck! GMC

09-12-2009, 10:38 AM	#3
breaker187 Full Member Join Date: Sep 2009 Posts: 14	I'm in Houston. Yeah i expect to have to do some modifications with this motor. I think if i call summit they can tell me which ones will work since they deal with them all day.

09-12-2009, 03:14 PM	#5
breaker187 Full Member Join Date: Sep 2009 Posts: 14	I dont know if my motor is flat tappet or roller. It is a 94' stock TBI 5.7. I can change out to what ever i have to.

09-15-2009, 08:51 PM	#10
breaker187 Full Member Join Date: Sep 2009 Posts: 14	Sorry about that. Didnt mean to show love to another forum, this one has helped out too much with me to do that to it.

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