94' chevy 2500 TBI Upgrade Questions

breaker187 · 09-12-2009, 08:22 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, 09:23 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, 09:38 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, 09:57 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, 02:14 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, 09:46 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, 09:10 PM

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

breaker187 · 09-14-2009, 09:10 PM

they are the L98 heads.

Wyley87 · 09-14-2009, 09:16 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, 07:51 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, 08:22 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, 09:46 PM	#6
Crmzendrgone Senior Member Join Date: Apr 2009 Location: Arizona Posts: 3,167	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. __________________

09-14-2009, 09:10 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 07:52 PM. Reason: no linking related forums

09-14-2009, 09:16 PM	#9
Wyley87 Senior Member Join Date: Jul 2009 Location: Arlington, Tx Posts: 663	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 305 2WD K&N FIPK C.A.I. Rebuilt Motor and Trans Mobil 1 15w50/Mobil 1 Filter 05 Nissan Xterra 4.0 V6 Royal Purple 5w30/Mobil 1 Filter Cost money to go fast...How fast do you wanna go?

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09-12-2009, 09:23 AM	#2
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,642	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, 09:38 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, 02:14 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, 07:51 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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