305 or 350 Intake Plenum and runners
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Car: 88 IROC convertible, 88 Sport Convertible---both RED
Engine: 350 TPI in the IROC, 305 TBI in the Sport
Transmission: 700R4 in both
305 or 350 Intake Plenum and runners
1988 IROC-Z engine was swapped from 305 to 350. Everthing was reused from 305 except new injectors were installed. I was told today that there are two sizes of intake plenum and runners and that I was loosing HP because the old one was reused from the 305. Is this true? Are there different sizes for the 305 and the 350?
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Car: 1991 Camaro Z28
Engine: 350
Transmission: 700R4
I think the knock sensor is also different. I'm not sure how the computer will do since it still thinks you are running the smaller injectors.
Last edited by Black 91 Z28; 11-03-2003 at 10:56 PM.
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Car: Check The Sig
Re: 305 or 350 Intake Plenum and runners
Originally posted by justadba
1988 IROC-Z engine was swapped from 305 to 350. Everthing was reused from 305 except new injectors were installed. I was told today that there are two sizes of intake plenum and runners and that I was loosing HP because the old one was reused from the 305. Is this true? Are there different sizes for the 305 and the 350?
1988 IROC-Z engine was swapped from 305 to 350. Everthing was reused from 305 except new injectors were installed. I was told today that there are two sizes of intake plenum and runners and that I was loosing HP because the old one was reused from the 305. Is this true? Are there different sizes for the 305 and the 350?
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Car: 88 IROC convertible, 88 Sport Convertible---both RED
Engine: 350 TPI in the IROC, 305 TBI in the Sport
Transmission: 700R4 in both
305-350
I DID already change the injectors (bought some 21# from JEGS). Couldn't get the car to pass state emissions inspection (Texas). So, they were changed over a year ago. AND, I purchased a stock 350 chip from a Chevy house at the same time. I was just talking to a guy at a Camaro Store yesterday and he said that there are 2 sizes for the runners and that I was loosing HP as a result of not changing it also. Was just curious if true or not....
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Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
As stated before, false. Only dif in Intake/runners is 85-88 which have a cold start setup and 89-92 that dont.
Size is same between 305 and 350.
But u should still grab some aftermarket intake/runners for it as u will get more power.
Personaly I'd remove the LTR setup and grab a HSR, cheaper and better for future upgrading.
Size is same between 305 and 350.
But u should still grab some aftermarket intake/runners for it as u will get more power.
Personaly I'd remove the LTR setup and grab a HSR, cheaper and better for future upgrading.
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